openstack
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cinder
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cinder/cinder/volume/drivers/ibm/storwize_svc/storwize_svc_common.py

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# Copyright 2015 IBM Corp.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
import math
import paramiko
import random
import re
import string
import time
import unicodedata
from eventlet import greenthread
from oslo_concurrency import processutils
from oslo_config import cfg
from oslo_log import log as logging
from oslo_service import loopingcall
from oslo_utils import excutils
from oslo_utils import strutils
from oslo_utils import units
import six
from cinder import context
from cinder import exception
from cinder import ssh_utils
from cinder import utils as cinder_utils
from cinder.i18n import _, _LE, _LI, _LW
from cinder.objects import fields
from cinder.volume import driver
from cinder.volume.drivers.ibm.storwize_svc import (
replication as storwize_rep)
from cinder.volume.drivers.san import san
from cinder.volume import qos_specs
from cinder.volume import utils
from cinder.volume import volume_types
INTERVAL_1_SEC = 1
DEFAULT_TIMEOUT = 15
LOG = logging.getLogger(__name__)
storwize_svc_opts = [
cfg.ListOpt('storwize_svc_volpool_name',
default=['volpool'],
help='Comma separated list of storage system storage '
'pools for volumes.'),
cfg.IntOpt('storwize_svc_vol_rsize',
default=2,
min=-1, max=100,
help='Storage system space-efficiency parameter for volumes '
'(percentage)'),
cfg.IntOpt('storwize_svc_vol_warning',
default=0,
min=-1, max=100,
help='Storage system threshold for volume capacity warnings '
'(percentage)'),
cfg.BoolOpt('storwize_svc_vol_autoexpand',
default=True,
help='Storage system autoexpand parameter for volumes '
'(True/False)'),
cfg.IntOpt('storwize_svc_vol_grainsize',
default=256,
help='Storage system grain size parameter for volumes '
'(32/64/128/256)'),
cfg.BoolOpt('storwize_svc_vol_compression',
default=False,
help='Storage system compression option for volumes'),
cfg.BoolOpt('storwize_svc_vol_easytier',
default=True,
help='Enable Easy Tier for volumes'),
cfg.IntOpt('storwize_svc_vol_iogrp',
default=0,
help='The I/O group in which to allocate volumes'),
cfg.IntOpt('storwize_svc_flashcopy_timeout',
default=120,
min=1, max=600,
help='Maximum number of seconds to wait for FlashCopy to be '
'prepared.'),
cfg.BoolOpt('storwize_svc_multihostmap_enabled',
default=True,
help='This option no longer has any affect. It is deprecated '
'and will be removed in the next release.',
deprecated_for_removal=True),
cfg.BoolOpt('storwize_svc_allow_tenant_qos',
default=False,
help='Allow tenants to specify QOS on create'),
cfg.StrOpt('storwize_svc_stretched_cluster_partner',
default=None,
help='If operating in stretched cluster mode, specify the '
'name of the pool in which mirrored copies are stored.'
'Example: "pool2"'),
cfg.StrOpt('storwize_san_secondary_ip',
default=None,
help='Specifies secondary management IP or hostname to be '
'used if san_ip is invalid or becomes inaccessible.'),
cfg.BoolOpt('storwize_svc_vol_nofmtdisk',
default=False,
help='Specifies that the volume not be formatted during '
'creation.'),
cfg.IntOpt('storwize_svc_flashcopy_rate',
default=50,
min=1, max=100,
help='Specifies the Storwize FlashCopy copy rate to be used '
'when creating a full volume copy. The default is rate '
'is 50, and the valid rates are 1-100.'),
]
CONF = cfg.CONF
CONF.register_opts(storwize_svc_opts)
class StorwizeSSH(object):
"""SSH interface to IBM Storwize family and SVC storage systems."""
def __init__(self, run_ssh):
self._ssh = run_ssh
def _run_ssh(self, ssh_cmd):
try:
return self._ssh(ssh_cmd)
except processutils.ProcessExecutionError as e:
msg = (_('CLI Exception output:\n command: %(cmd)s\n '
'stdout: %(out)s\n stderr: %(err)s.') %
{'cmd': ssh_cmd,
'out': e.stdout,
'err': e.stderr})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
def run_ssh_info(self, ssh_cmd, delim='!', with_header=False):
"""Run an SSH command and return parsed output."""
raw = self._run_ssh(ssh_cmd)
return CLIResponse(raw, ssh_cmd=ssh_cmd, delim=delim,
with_header=with_header)
def run_ssh_assert_no_output(self, ssh_cmd):
"""Run an SSH command and assert no output returned."""
out, err = self._run_ssh(ssh_cmd)
if len(out.strip()) != 0:
msg = (_('Expected no output from CLI command %(cmd)s, '
'got %(out)s.') % {'cmd': ' '.join(ssh_cmd), 'out': out})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
def run_ssh_check_created(self, ssh_cmd):
"""Run an SSH command and return the ID of the created object."""
out, err = self._run_ssh(ssh_cmd)
try:
match_obj = re.search(r'\[([0-9]+)\],? successfully created', out)
return match_obj.group(1)
except (AttributeError, IndexError):
msg = (_('Failed to parse CLI output:\n command: %(cmd)s\n '
'stdout: %(out)s\n stderr: %(err)s.') %
{'cmd': ssh_cmd,
'out': out,
'err': err})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
def lsnode(self, node_id=None):
with_header = True
ssh_cmd = ['svcinfo', 'lsnode', '-delim', '!']
if node_id:
with_header = False
ssh_cmd.append(node_id)
return self.run_ssh_info(ssh_cmd, with_header=with_header)
def lslicense(self):
ssh_cmd = ['svcinfo', 'lslicense', '-delim', '!']
return self.run_ssh_info(ssh_cmd)[0]
def lsguicapabilities(self):
ssh_cmd = ['svcinfo', 'lsguicapabilities', '-delim', '!']
return self.run_ssh_info(ssh_cmd)[0]
def lssystem(self):
ssh_cmd = ['svcinfo', 'lssystem', '-delim', '!']
return self.run_ssh_info(ssh_cmd)[0]
def lsmdiskgrp(self, pool):
ssh_cmd = ['svcinfo', 'lsmdiskgrp', '-bytes', '-delim', '!',
'"%s"' % pool]
return self.run_ssh_info(ssh_cmd)[0]
def lsiogrp(self):
ssh_cmd = ['svcinfo', 'lsiogrp', '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def lsportip(self):
ssh_cmd = ['svcinfo', 'lsportip', '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
@staticmethod
def _create_port_arg(port_type, port_name):
if port_type == 'initiator':
port = ['-iscsiname']
else:
port = ['-hbawwpn']
port.append(port_name)
return port
def mkhost(self, host_name, port_type, port_name):
port = self._create_port_arg(port_type, port_name)
ssh_cmd = ['svctask', 'mkhost', '-force'] + port
ssh_cmd += ['-name', '"%s"' % host_name]
return self.run_ssh_check_created(ssh_cmd)
def addhostport(self, host, port_type, port_name):
port = self._create_port_arg(port_type, port_name)
ssh_cmd = ['svctask', 'addhostport', '-force'] + port + ['"%s"' % host]
self.run_ssh_assert_no_output(ssh_cmd)
def lshost(self, host=None):
with_header = True
ssh_cmd = ['svcinfo', 'lshost', '-delim', '!']
if host:
with_header = False
ssh_cmd.append('"%s"' % host)
return self.run_ssh_info(ssh_cmd, with_header=with_header)
def add_chap_secret(self, secret, host):
ssh_cmd = ['svctask', 'chhost', '-chapsecret', secret, '"%s"' % host]
self.run_ssh_assert_no_output(ssh_cmd)
def lsiscsiauth(self):
ssh_cmd = ['svcinfo', 'lsiscsiauth', '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def lsfabric(self, wwpn=None, host=None):
ssh_cmd = ['svcinfo', 'lsfabric', '-delim', '!']
if wwpn:
ssh_cmd.extend(['-wwpn', wwpn])
elif host:
ssh_cmd.extend(['-host', '"%s"' % host])
else:
msg = (_('Must pass wwpn or host to lsfabric.'))
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
return self.run_ssh_info(ssh_cmd, with_header=True)
def mkvdiskhostmap(self, host, vdisk, lun, multihostmap):
"""Map vdisk to host.
If vdisk already mapped and multihostmap is True, use the force flag.
"""
ssh_cmd = ['svctask', 'mkvdiskhostmap', '-host', '"%s"' % host,
'-scsi', lun, vdisk]
if multihostmap:
ssh_cmd.insert(ssh_cmd.index('mkvdiskhostmap') + 1, '-force')
try:
self.run_ssh_check_created(ssh_cmd)
except Exception as ex:
if (not multihostmap and hasattr(ex, 'message') and
'CMMVC6071E' in ex.message):
LOG.error(_LE('storwize_svc_multihostmap_enabled is set '
'to False, not allowing multi host mapping.'))
raise exception.VolumeDriverException(
message=_('CMMVC6071E The VDisk-to-host mapping was not '
'created because the VDisk is already mapped '
'to a host.\n"'))
with excutils.save_and_reraise_exception():
LOG.error(_LE('Error mapping VDisk-to-host'))
def mkrcrelationship(self, master, aux, system, name, asyncmirror):
ssh_cmd = ['svctask', 'mkrcrelationship', '-master', master,
'-aux', aux, '-cluster', system, '-name', name]
if asyncmirror:
ssh_cmd.append('-global')
return self.run_ssh_check_created(ssh_cmd)
def rmrcrelationship(self, relationship):
ssh_cmd = ['svctask', 'rmrcrelationship', relationship]
self.run_ssh_assert_no_output(ssh_cmd)
def switchrelationship(self, relationship, aux=True):
primary = 'aux' if aux else 'master'
ssh_cmd = ['svctask', 'switchrcrelationship', '-primary',
primary, relationship]
self.run_ssh_assert_no_output(ssh_cmd)
def startrcrelationship(self, rc_rel, primary=None):
ssh_cmd = ['svctask', 'startrcrelationship', '-force']
if primary:
ssh_cmd.extend(['-primary', primary])
ssh_cmd.append(rc_rel)
self.run_ssh_assert_no_output(ssh_cmd)
def stoprcrelationship(self, relationship, access=False):
ssh_cmd = ['svctask', 'stoprcrelationship']
if access:
ssh_cmd.append('-access')
ssh_cmd.append(relationship)
self.run_ssh_assert_no_output(ssh_cmd)
def lsrcrelationship(self, volume_name):
key_value = 'name=%s' % volume_name
ssh_cmd = ['svcinfo', 'lsrcrelationship', '-filtervalue',
key_value, '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def lspartnership(self, system_name):
key_value = 'name=%s' % system_name
ssh_cmd = ['svcinfo', 'lspartnership', '-filtervalue',
key_value, '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def lspartnershipcandidate(self):
ssh_cmd = ['svcinfo', 'lspartnershipcandidate', '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def mkippartnership(self, ip_v4, bandwith):
ssh_cmd = ['svctask', 'mkippartnership', '-type', 'ipv4',
'-clusterip', ip_v4, '-linkbandwidthmbits',
six.text_type(bandwith)]
return self.run_ssh_assert_no_output(ssh_cmd)
def mkfcpartnership(self, system_name, bandwith):
ssh_cmd = ['svctask', 'mkfcpartnership', '-linkbandwidthmbits',
six.text_type(bandwith), system_name]
return self.run_ssh_assert_no_output(ssh_cmd)
def startpartnership(self, partnership_id):
ssh_cmd = ['svctask', 'chpartnership', '-start', partnership_id]
return self.run_ssh_assert_no_output(ssh_cmd)
def rmvdiskhostmap(self, host, vdisk):
ssh_cmd = ['svctask', 'rmvdiskhostmap', '-host', '"%s"' % host, vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def lsvdiskhostmap(self, vdisk):
ssh_cmd = ['svcinfo', 'lsvdiskhostmap', '-delim', '!', vdisk]
return self.run_ssh_info(ssh_cmd, with_header=True)
def lshostvdiskmap(self, host):
ssh_cmd = ['svcinfo', 'lshostvdiskmap', '-delim', '!', '"%s"' % host]
return self.run_ssh_info(ssh_cmd, with_header=True)
def rmhost(self, host):
ssh_cmd = ['svctask', 'rmhost', '"%s"' % host]
self.run_ssh_assert_no_output(ssh_cmd)
def mkvdisk(self, name, size, units, pool, opts, params):
ssh_cmd = ['svctask', 'mkvdisk', '-name', name, '-mdiskgrp',
'"%s"' % pool, '-iogrp', six.text_type(opts['iogrp']),
'-size', size, '-unit', units] + params
return self.run_ssh_check_created(ssh_cmd)
def rmvdisk(self, vdisk, force=True):
ssh_cmd = ['svctask', 'rmvdisk']
if force:
ssh_cmd += ['-force']
ssh_cmd += [vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def lsvdisk(self, vdisk):
"""Return vdisk attributes or None if it doesn't exist."""
ssh_cmd = ['svcinfo', 'lsvdisk', '-bytes', '-delim', '!', vdisk]
out, err = self._ssh(ssh_cmd, check_exit_code=False)
if not len(err):
return CLIResponse((out, err), ssh_cmd=ssh_cmd, delim='!',
with_header=False)[0]
if err.startswith('CMMVC5754E'):
return None
msg = (_('CLI Exception output:\n command: %(cmd)s\n '
'stdout: %(out)s\n stderr: %(err)s.') %
{'cmd': ssh_cmd,
'out': out,
'err': err})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
def lsvdisks_from_filter(self, filter_name, value):
"""Performs an lsvdisk command, filtering the results as specified.
Returns an iterable for all matching vdisks.
"""
ssh_cmd = ['svcinfo', 'lsvdisk', '-bytes', '-delim', '!',
'-filtervalue', '%s=%s' % (filter_name, value)]
return self.run_ssh_info(ssh_cmd, with_header=True)
def chvdisk(self, vdisk, params):
ssh_cmd = ['svctask', 'chvdisk'] + params + [vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def movevdisk(self, vdisk, iogrp):
ssh_cmd = ['svctask', 'movevdisk', '-iogrp', iogrp, vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def expandvdisksize(self, vdisk, amount):
ssh_cmd = (
['svctask', 'expandvdisksize', '-size', six.text_type(amount),
'-unit', 'gb', vdisk])
self.run_ssh_assert_no_output(ssh_cmd)
def mkfcmap(self, source, target, full_copy, copy_rate, consistgrp=None):
ssh_cmd = ['svctask', 'mkfcmap', '-source', source, '-target',
target, '-autodelete']
if not full_copy:
ssh_cmd.extend(['-copyrate', '0'])
else:
ssh_cmd.extend(['-copyrate', six.text_type(copy_rate)])
if consistgrp:
ssh_cmd.extend(['-consistgrp', consistgrp])
out, err = self._ssh(ssh_cmd, check_exit_code=False)
if 'successfully created' not in out:
msg = (_('CLI Exception output:\n command: %(cmd)s\n '
'stdout: %(out)s\n stderr: %(err)s.') %
{'cmd': ssh_cmd,
'out': out,
'err': err})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
try:
match_obj = re.search(r'FlashCopy Mapping, id \[([0-9]+)\], '
'successfully created', out)
fc_map_id = match_obj.group(1)
except (AttributeError, IndexError):
msg = (_('Failed to parse CLI output:\n command: %(cmd)s\n '
'stdout: %(out)s\n stderr: %(err)s.') %
{'cmd': ssh_cmd,
'out': out,
'err': err})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
return fc_map_id
def prestartfcmap(self, fc_map_id):
ssh_cmd = ['svctask', 'prestartfcmap', fc_map_id]
self.run_ssh_assert_no_output(ssh_cmd)
def startfcmap(self, fc_map_id):
ssh_cmd = ['svctask', 'startfcmap', fc_map_id]
self.run_ssh_assert_no_output(ssh_cmd)
def prestartfcconsistgrp(self, fc_consist_group):
ssh_cmd = ['svctask', 'prestartfcconsistgrp', fc_consist_group]
self.run_ssh_assert_no_output(ssh_cmd)
def startfcconsistgrp(self, fc_consist_group):
ssh_cmd = ['svctask', 'startfcconsistgrp', fc_consist_group]
self.run_ssh_assert_no_output(ssh_cmd)
def stopfcconsistgrp(self, fc_consist_group):
ssh_cmd = ['svctask', 'stopfcconsistgrp', fc_consist_group]
self.run_ssh_assert_no_output(ssh_cmd)
def chfcmap(self, fc_map_id, copyrate='50', autodel='on'):
ssh_cmd = ['svctask', 'chfcmap', '-copyrate', copyrate,
'-autodelete', autodel, fc_map_id]
self.run_ssh_assert_no_output(ssh_cmd)
def stopfcmap(self, fc_map_id):
ssh_cmd = ['svctask', 'stopfcmap', fc_map_id]
self.run_ssh_assert_no_output(ssh_cmd)
def rmfcmap(self, fc_map_id):
ssh_cmd = ['svctask', 'rmfcmap', '-force', fc_map_id]
self.run_ssh_assert_no_output(ssh_cmd)
def lsvdiskfcmappings(self, vdisk):
ssh_cmd = ['svcinfo', 'lsvdiskfcmappings', '-delim', '!', vdisk]
return self.run_ssh_info(ssh_cmd, with_header=True)
def lsfcmap(self, fc_map_id):
ssh_cmd = ['svcinfo', 'lsfcmap', '-filtervalue',
'id=%s' % fc_map_id, '-delim', '!']
return self.run_ssh_info(ssh_cmd, with_header=True)
def lsfcconsistgrp(self, fc_consistgrp):
ssh_cmd = ['svcinfo', 'lsfcconsistgrp', '-delim', '!', fc_consistgrp]
out, err = self._ssh(ssh_cmd)
return CLIResponse((out, err), ssh_cmd=ssh_cmd, delim='!',
with_header=False)
def mkfcconsistgrp(self, fc_consist_group):
ssh_cmd = ['svctask', 'mkfcconsistgrp', '-name', fc_consist_group]
return self.run_ssh_check_created(ssh_cmd)
def rmfcconsistgrp(self, fc_consist_group):
ssh_cmd = ['svctask', 'rmfcconsistgrp', '-force', fc_consist_group]
return self.run_ssh_assert_no_output(ssh_cmd)
def addvdiskcopy(self, vdisk, dest_pool, params):
ssh_cmd = (['svctask', 'addvdiskcopy'] + params + ['-mdiskgrp',
'"%s"' % dest_pool, vdisk])
return self.run_ssh_check_created(ssh_cmd)
def lsvdiskcopy(self, vdisk, copy_id=None):
ssh_cmd = ['svcinfo', 'lsvdiskcopy', '-delim', '!']
with_header = True
if copy_id:
ssh_cmd += ['-copy', copy_id]
with_header = False
ssh_cmd += [vdisk]
return self.run_ssh_info(ssh_cmd, with_header=with_header)
def lsvdisksyncprogress(self, vdisk, copy_id):
ssh_cmd = ['svcinfo', 'lsvdisksyncprogress', '-delim', '!',
'-copy', copy_id, vdisk]
return self.run_ssh_info(ssh_cmd, with_header=True)[0]
def rmvdiskcopy(self, vdisk, copy_id):
ssh_cmd = ['svctask', 'rmvdiskcopy', '-copy', copy_id, vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def addvdiskaccess(self, vdisk, iogrp):
ssh_cmd = ['svctask', 'addvdiskaccess', '-iogrp', iogrp, vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def rmvdiskaccess(self, vdisk, iogrp):
ssh_cmd = ['svctask', 'rmvdiskaccess', '-iogrp', iogrp, vdisk]
self.run_ssh_assert_no_output(ssh_cmd)
def lsportfc(self, node_id):
ssh_cmd = ['svcinfo', 'lsportfc', '-delim', '!',
'-filtervalue', 'node_id=%s' % node_id]
return self.run_ssh_info(ssh_cmd, with_header=True)
class StorwizeHelpers(object):
# All the supported QoS key are saved in this dict. When a new
# key is going to add, three values MUST be set:
# 'default': to indicate the value, when the parameter is disabled.
# 'param': to indicate the corresponding parameter in the command.
# 'type': to indicate the type of this value.
svc_qos_keys = {'IOThrottling': {'default': '0',
'param': 'rate',
'type': int}}
def __init__(self, run_ssh):
self.ssh = StorwizeSSH(run_ssh)
self.check_fcmapping_interval = 3
@staticmethod
def handle_keyerror(cmd, out):
msg = (_('Could not find key in output of command %(cmd)s: %(out)s.')
% {'out': out, 'cmd': cmd})
raise exception.VolumeBackendAPIException(data=msg)
def compression_enabled(self):
"""Return whether or not compression is enabled for this system."""
resp = self.ssh.lslicense()
keys = ['license_compression_enclosures',
'license_compression_capacity']
for key in keys:
if resp.get(key, '0') != '0':
return True
# lslicense is not used for V9000 compression check
# compression_enclosures and compression_capacity are
# always 0. V9000 uses license_scheme 9846 as an
# indicator and can always do compression
try:
resp = self.ssh.lsguicapabilities()
if resp.get('license_scheme', '0') == '9846':
return True
except exception.VolumeBackendAPIException as war:
LOG.warning(_LW("Failed to run lsguicapability. "
"Exception: %s."), war)
return False
def get_system_info(self):
"""Return system's name, ID, and code level."""
resp = self.ssh.lssystem()
level = resp['code_level']
match_obj = re.search('([0-9].){3}[0-9]', level)
if match_obj is None:
msg = _('Failed to get code level (%s).') % level
raise exception.VolumeBackendAPIException(data=msg)
code_level = match_obj.group().split('.')
return {'code_level': tuple([int(x) for x in code_level]),
'system_name': resp['name'],
'system_id': resp['id']}
def get_pool_attrs(self, pool):
"""Return attributes for the specified pool."""
return self.ssh.lsmdiskgrp(pool)
def get_available_io_groups(self):
"""Return list of available IO groups."""
iogrps = []
resp = self.ssh.lsiogrp()
for iogrp in resp:
try:
if int(iogrp['node_count']) > 0:
iogrps.append(int(iogrp['id']))
except KeyError:
self.handle_keyerror('lsiogrp', iogrp)
except ValueError:
msg = (_('Expected integer for node_count, '
'svcinfo lsiogrp returned: %(node)s.') %
{'node': iogrp['node_count']})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
return iogrps
def get_volume_io_group(self, vol_name):
vdisk = self.ssh.lsvdisk(vol_name)
if vdisk:
resp = self.ssh.lsiogrp()
for iogrp in resp:
if iogrp['name'] == vdisk['IO_group_name']:
return int(iogrp['id'])
return None
def get_node_info(self):
"""Return dictionary containing information on system's nodes."""
nodes = {}
resp = self.ssh.lsnode()
for node_data in resp:
try:
if node_data['status'] != 'online':
continue
node = {}
node['id'] = node_data['id']
node['name'] = node_data['name']
node['IO_group'] = node_data['IO_group_id']
node['iscsi_name'] = node_data['iscsi_name']
node['WWNN'] = node_data['WWNN']
node['status'] = node_data['status']
node['WWPN'] = []
node['ipv4'] = []
node['ipv6'] = []
node['enabled_protocols'] = []
nodes[node['id']] = node
except KeyError:
self.handle_keyerror('lsnode', node_data)
return nodes
def add_iscsi_ip_addrs(self, storage_nodes):
"""Add iSCSI IP addresses to system node information."""
resp = self.ssh.lsportip()
for ip_data in resp:
try:
state = ip_data['state']
if ip_data['node_id'] in storage_nodes and (
state == 'configured' or state == 'online'):
node = storage_nodes[ip_data['node_id']]
if len(ip_data['IP_address']):
node['ipv4'].append(ip_data['IP_address'])
if len(ip_data['IP_address_6']):
node['ipv6'].append(ip_data['IP_address_6'])
except KeyError:
self.handle_keyerror('lsportip', ip_data)
def add_fc_wwpns(self, storage_nodes):
"""Add FC WWPNs to system node information."""
for key in storage_nodes:
node = storage_nodes[key]
wwpns = set(node['WWPN'])
resp = self.ssh.lsportfc(node_id=node['id'])
for port_info in resp:
if (port_info['type'] == 'fc' and
port_info['status'] == 'active'):
wwpns.add(port_info['WWPN'])
node['WWPN'] = list(wwpns)
LOG.info(_LI('WWPN on node %(node)s: %(wwpn)s.'),
{'node': node['id'], 'wwpn': node['WWPN']})
def add_chap_secret_to_host(self, host_name):
"""Generate and store a randomly-generated CHAP secret for the host."""
chap_secret = utils.generate_password()
self.ssh.add_chap_secret(chap_secret, host_name)
return chap_secret
def get_chap_secret_for_host(self, host_name):
"""Generate and store a randomly-generated CHAP secret for the host."""
resp = self.ssh.lsiscsiauth()
host_found = False
for host_data in resp:
try:
if host_data['name'] == host_name:
host_found = True
if host_data['iscsi_auth_method'] == 'chap':
return host_data['iscsi_chap_secret']
except KeyError:
self.handle_keyerror('lsiscsiauth', host_data)
if not host_found:
msg = _('Failed to find host %s.') % host_name
raise exception.VolumeBackendAPIException(data=msg)
return None
def get_conn_fc_wwpns(self, host):
wwpns = set()
resp = self.ssh.lsfabric(host=host)
for wwpn in resp.select('local_wwpn'):
if wwpn is not None:
wwpns.add(wwpn)
return list(wwpns)
def get_host_from_connector(self, connector):
"""Return the Storwize host described by the connector."""
LOG.debug('Enter: get_host_from_connector: %s.', connector)
# If we have FC information, we have a faster lookup option
host_name = None
if 'wwpns' in connector:
for wwpn in connector['wwpns']:
resp = self.ssh.lsfabric(wwpn=wwpn)
for wwpn_info in resp:
try:
if (wwpn_info['remote_wwpn'] and
wwpn_info['name'] and
wwpn_info['remote_wwpn'].lower() ==
wwpn.lower()):
host_name = wwpn_info['name']
except KeyError:
self.handle_keyerror('lsfabric', wwpn_info)
if host_name:
LOG.debug('Leave: get_host_from_connector: host %s.', host_name)
return host_name
# That didn't work, so try exhaustive search
hosts_info = self.ssh.lshost()
found = False
for name in hosts_info.select('name'):
try:
resp = self.ssh.lshost(host=name)
except processutils.ProcessExecutionError as ex:
if 'CMMVC5754E' in ex.stderr:
# CMMVC5754E: The specified object does not exist
# The host has been deleted while walking the list.
# This is a result of a host change on the SVC that
# is out of band to this request.
continue
# unexpected error so reraise it
with excutils.save_and_reraise_exception():
pass
if 'initiator' in connector:
for iscsi in resp.select('iscsi_name'):
if iscsi == connector['initiator']:
host_name = name
found = True
break
elif 'wwpns' in connector and len(connector['wwpns']):
connector_wwpns = [str(x).lower() for x in connector['wwpns']]
for wwpn in resp.select('WWPN'):
if wwpn and wwpn.lower() in connector_wwpns:
host_name = name
found = True
break
if found:
break
LOG.debug('Leave: get_host_from_connector: host %s.', host_name)
return host_name
def create_host(self, connector):
"""Create a new host on the storage system.
We create a host name and associate it with the given connection
information. The host name will be a cleaned up version of the given
host name (at most 55 characters), plus a random 8-character suffix to
avoid collisions. The total length should be at most 63 characters.
"""
LOG.debug('Enter: create_host: host %s.', connector['host'])
# Before we start, make sure host name is a string and that we have at
# least one port.
host_name = connector['host']
if not isinstance(host_name, six.string_types):
msg = _('create_host: Host name is not unicode or string.')
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
ports = []
if 'initiator' in connector:
ports.append(['initiator', '%s' % connector['initiator']])
if 'wwpns' in connector:
for wwpn in connector['wwpns']:
ports.append(['wwpn', '%s' % wwpn])
if not len(ports):
msg = _('create_host: No initiators or wwpns supplied.')
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
# Build a host name for the Storwize host - first clean up the name
if isinstance(host_name, six.text_type):
host_name = unicodedata.normalize('NFKD', host_name).encode(
'ascii', 'replace').decode('ascii')
for num in range(0, 128):
ch = str(chr(num))
if not ch.isalnum() and ch not in [' ', '.', '-', '_']:
host_name = host_name.replace(ch, '-')
# Storwize doesn't like hostname that doesn't starts with letter or _.
if not re.match('^[A-Za-z]', host_name):
host_name = '_' + host_name
# Add a random 8-character suffix to avoid collisions
rand_id = str(random.randint(0, 99999999)).zfill(8)
host_name = '%s-%s' % (host_name[:55], rand_id)
# Create a host with one port
port = ports.pop(0)
self.ssh.mkhost(host_name, port[0], port[1])
# Add any additional ports to the host
for port in ports:
self.ssh.addhostport(host_name, port[0], port[1])
LOG.debug('Leave: create_host: host %(host)s - %(host_name)s.',
{'host': connector['host'], 'host_name': host_name})
return host_name
def delete_host(self, host_name):
self.ssh.rmhost(host_name)
def map_vol_to_host(self, volume_name, host_name, multihostmap):
"""Create a mapping between a volume to a host."""
LOG.debug('Enter: map_vol_to_host: volume %(volume_name)s to '
'host %(host_name)s.',
{'volume_name': volume_name, 'host_name': host_name})
# Check if this volume is already mapped to this host
mapped = False
luns_used = []
result_lun = '-1'
resp = self.ssh.lshostvdiskmap(host_name)
for mapping_info in resp:
luns_used.append(int(mapping_info['SCSI_id']))
if mapping_info['vdisk_name'] == volume_name:
mapped = True
result_lun = mapping_info['SCSI_id']
if not mapped:
# Find unused lun
luns_used.sort()
result_lun = str(len(luns_used))
for index, n in enumerate(luns_used):
if n > index:
result_lun = str(index)
break
self.ssh.mkvdiskhostmap(host_name, volume_name, result_lun,
multihostmap)
LOG.debug('Leave: map_vol_to_host: LUN %(result_lun)s, volume '
'%(volume_name)s, host %(host_name)s.',
{'result_lun': result_lun,
'volume_name': volume_name,
'host_name': host_name})
return int(result_lun)
def unmap_vol_from_host(self, volume_name, host_name):
"""Unmap the volume and delete the host if it has no more mappings."""
LOG.debug('Enter: unmap_vol_from_host: volume %(volume_name)s from '
'host %(host_name)s.',
{'volume_name': volume_name, 'host_name': host_name})
# Check if the mapping exists
resp = self.ssh.lsvdiskhostmap(volume_name)
if not len(resp):
LOG.warning(_LW('unmap_vol_from_host: No mapping of volume '
'%(vol_name)s to any host found.'),
{'vol_name': volume_name})
return
if host_name is None:
if len(resp) > 1:
LOG.warning(_LW('unmap_vol_from_host: Multiple mappings of '
'volume %(vol_name)s found, no host '
'specified.'), {'vol_name': volume_name})
return
else:
host_name = resp[0]['host_name']
else:
found = False
for h in resp.select('host_name'):
if h == host_name:
found = True
if not found:
LOG.warning(_LW('unmap_vol_from_host: No mapping of volume '
'%(vol_name)s to host %(host)s found.'),
{'vol_name': volume_name, 'host': host_name})
# We now know that the mapping exists
self.ssh.rmvdiskhostmap(host_name, volume_name)
LOG.debug('Leave: unmap_vol_from_host: volume %(volume_name)s from '
'host %(host_name)s.',
{'volume_name': volume_name, 'host_name': host_name})
return host_name
def check_host_mapped_vols(self, host_name):
return self.ssh.lshostvdiskmap(host_name)
@staticmethod
def build_default_opts(config):
# Ignore capitalization
cluster_partner = config.storwize_svc_stretched_cluster_partner
opt = {'rsize': config.storwize_svc_vol_rsize,
'warning': config.storwize_svc_vol_warning,
'autoexpand': config.storwize_svc_vol_autoexpand,
'grainsize': config.storwize_svc_vol_grainsize,
'compression': config.storwize_svc_vol_compression,
'easytier': config.storwize_svc_vol_easytier,
'iogrp': config.storwize_svc_vol_iogrp,
'qos': None,
'stretched_cluster': cluster_partner,
'replication': False,
'nofmtdisk': config.storwize_svc_vol_nofmtdisk}
return opt
@staticmethod
def check_vdisk_opts(state, opts):
# Check that grainsize is 32/64/128/256
if opts['grainsize'] not in [32, 64, 128, 256]:
raise exception.InvalidInput(
reason=_('Illegal value specified for '
'storwize_svc_vol_grainsize: set to either '
'32, 64, 128, or 256.'))
# Check that compression is supported
if opts['compression'] and not state['compression_enabled']:
raise exception.InvalidInput(
reason=_('System does not support compression.'))
# Check that rsize is set if compression is set
if opts['compression'] and opts['rsize'] == -1:
raise exception.InvalidInput(
reason=_('If compression is set to True, rsize must '
'also be set (not equal to -1).'))
if opts['iogrp'] not in state['available_iogrps']:
avail_grps = ''.join(str(e) for e in state['available_iogrps'])
raise exception.InvalidInput(
reason=_('I/O group %(iogrp)d is not valid; available '
'I/O groups are %(avail)s.')
% {'iogrp': opts['iogrp'],
'avail': avail_grps})
if opts['nofmtdisk'] and opts['rsize'] != -1:
raise exception.InvalidInput(
reason=_('If nofmtdisk is set to True, rsize must '
'also be set to -1.'))
def _get_opts_from_specs(self, opts, specs):
qos = {}
for k, value in specs.items():
# Get the scope, if using scope format
key_split = k.split(':')
if len(key_split) == 1:
scope = None
key = key_split[0]
else:
scope = key_split[0]
key = key_split[1]
# We generally do not look at capabilities in the driver, but
# replication is a special case where the user asks for
# a volume to be replicated, and we want both the scheduler and
# the driver to act on the value.
if ((not scope or scope == 'capabilities') and
key == 'replication'):
scope = None
key = 'replication'
words = value.split()
if not (words and len(words) == 2 and words[0] == '<is>'):
LOG.error(_LE('Replication must be specified as '
'\'<is> True\' or \'<is> False\'.'))
del words[0]
value = words[0]
# Add the QoS.
if scope and scope == 'qos':
if key in self.svc_qos_keys.keys():
try:
type_fn = self.svc_qos_keys[key]['type']
value = type_fn(value)
qos[key] = value
except ValueError:
continue
# Any keys that the driver should look at should have the
# 'drivers' scope.
if scope and scope != 'drivers':
continue
if key in opts:
this_type = type(opts[key]).__name__
if this_type == 'int':
value = int(value)
elif this_type == 'bool':
value = strutils.bool_from_string(value)
opts[key] = value
if len(qos) != 0:
opts['qos'] = qos
return opts
def _get_qos_from_volume_metadata(self, volume_metadata):
"""Return the QoS information from the volume metadata."""
qos = {}
for i in volume_metadata:
k = i.get('key', None)
value = i.get('value', None)
key_split = k.split(':')
if len(key_split) == 1:
scope = None
key = key_split[0]
else:
scope = key_split[0]
key = key_split[1]
# Add the QoS.
if scope and scope == 'qos':
if key in self.svc_qos_keys.keys():
try:
type_fn = self.svc_qos_keys[key]['type']
value = type_fn(value)
qos[key] = value
except ValueError:
continue
return qos
def _wait_for_a_condition(self, testmethod, timeout=None,
interval=INTERVAL_1_SEC):
start_time = time.time()
if timeout is None:
timeout = DEFAULT_TIMEOUT
def _inner():
try:
testValue = testmethod()
except Exception as ex:
testValue = False
LOG.debug('Helper.'
'_wait_for_condition: %(method_name)s '
'execution failed for %(exception)s.',
{'method_name': testmethod.__name__,
'exception': ex.message})
if testValue:
raise loopingcall.LoopingCallDone()
if int(time.time()) - start_time > timeout:
msg = (_('CommandLineHelper._wait_for_condition: %s timeout.')
% testmethod.__name__)
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
timer = loopingcall.FixedIntervalLoopingCall(_inner)
timer.start(interval=interval).wait()
def get_vdisk_params(self, config, state, type_id,
volume_type=None, volume_metadata=None):
"""Return the parameters for creating the vdisk.
Takes volume type and defaults from config options into account.
"""
opts = self.build_default_opts(config)
ctxt = context.get_admin_context()
if volume_type is None and type_id is not None:
volume_type = volume_types.get_volume_type(ctxt, type_id)
if volume_type:
qos_specs_id = volume_type.get('qos_specs_id')
specs = dict(volume_type).get('extra_specs')
# NOTE(vhou): We prefer the qos_specs association
# and over-ride any existing
# extra-specs settings if present
if qos_specs_id is not None:
kvs = qos_specs.get_qos_specs(ctxt, qos_specs_id)['specs']
# Merge the qos_specs into extra_specs and qos_specs has higher
# priority than extra_specs if they have different values for
# the same key.
specs.update(kvs)
opts = self._get_opts_from_specs(opts, specs)
if (opts['qos'] is None and config.storwize_svc_allow_tenant_qos
and volume_metadata):
qos = self._get_qos_from_volume_metadata(volume_metadata)
if len(qos) != 0:
opts['qos'] = qos
self.check_vdisk_opts(state, opts)
return opts
@staticmethod
def _get_vdisk_create_params(opts):
easytier = 'on' if opts['easytier'] else 'off'
if opts['rsize'] == -1:
params = []
if opts['nofmtdisk']:
params.append('-nofmtdisk')
else:
params = ['-rsize', '%s%%' % str(opts['rsize']),
'-autoexpand', '-warning',
'%s%%' % str(opts['warning'])]
if not opts['autoexpand']:
params.remove('-autoexpand')
if opts['compression']:
params.append('-compressed')
else:
params.extend(['-grainsize', str(opts['grainsize'])])
params.extend(['-easytier', easytier])
return params
def create_vdisk(self, name, size, units, pool, opts):
LOG.debug('Enter: create_vdisk: vdisk %s.', name)
params = self._get_vdisk_create_params(opts)
self.ssh.mkvdisk(name, size, units, pool, opts, params)
LOG.debug('Leave: _create_vdisk: volume %s.', name)
def get_vdisk_attributes(self, vdisk):
attrs = self.ssh.lsvdisk(vdisk)
return attrs
def is_vdisk_defined(self, vdisk_name):
"""Check if vdisk is defined."""
attrs = self.get_vdisk_attributes(vdisk_name)
return attrs is not None
def find_vdisk_copy_id(self, vdisk, pool):
resp = self.ssh.lsvdiskcopy(vdisk)
for copy_id, mdisk_grp in resp.select('copy_id', 'mdisk_grp_name'):
if mdisk_grp == pool:
return copy_id
msg = _('Failed to find a vdisk copy in the expected pool.')
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
def get_vdisk_copy_attrs(self, vdisk, copy_id):
return self.ssh.lsvdiskcopy(vdisk, copy_id=copy_id)[0]
def get_vdisk_copies(self, vdisk):
copies = {'primary': None,
'secondary': None}
resp = self.ssh.lsvdiskcopy(vdisk)
for copy_id, status, sync, primary, mdisk_grp in (
resp.select('copy_id', 'status', 'sync',
'primary', 'mdisk_grp_name')):
copy = {'copy_id': copy_id,
'status': status,
'sync': sync,
'primary': primary,
'mdisk_grp_name': mdisk_grp,
'sync_progress': None}
if copy['sync'] != 'yes':
progress_info = self.ssh.lsvdisksyncprogress(vdisk, copy_id)
copy['sync_progress'] = progress_info['progress']
if copy['primary'] == 'yes':
copies['primary'] = copy
else:
copies['secondary'] = copy
return copies
def _prepare_fc_map(self, fc_map_id, timeout):
self.ssh.prestartfcmap(fc_map_id)
mapping_ready = False
wait_time = 5
max_retries = (timeout // wait_time) + 1
for try_number in range(1, max_retries):
mapping_attrs = self._get_flashcopy_mapping_attributes(fc_map_id)
if (mapping_attrs is None or
'status' not in mapping_attrs):
break
if mapping_attrs['status'] == 'prepared':
mapping_ready = True
break
elif mapping_attrs['status'] == 'stopped':
self.ssh.prestartfcmap(fc_map_id)
elif mapping_attrs['status'] != 'preparing':
msg = (_('Unexecpted mapping status %(status)s for mapping '
'%(id)s. Attributes: %(attr)s.')
% {'status': mapping_attrs['status'],
'id': fc_map_id,
'attr': mapping_attrs})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
greenthread.sleep(wait_time)
if not mapping_ready:
msg = (_('Mapping %(id)s prepare failed to complete within the'
'allotted %(to)d seconds timeout. Terminating.')
% {'id': fc_map_id,
'to': timeout})
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
def start_fc_consistgrp(self, fc_consistgrp):
self.ssh.startfcconsistgrp(fc_consistgrp)
def create_fc_consistgrp(self, fc_consistgrp):
self.ssh.mkfcconsistgrp(fc_consistgrp)
def delete_fc_consistgrp(self, fc_consistgrp):
self.ssh.rmfcconsistgrp(fc_consistgrp)
def stop_fc_consistgrp(self, fc_consistgrp):
self.ssh.stopfcconsistgrp(fc_consistgrp)
def run_consistgrp_snapshots(self, fc_consistgrp, snapshots, state,
config, timeout):
cgsnapshot = {'status': 'available'}
try:
for snapshot in snapshots:
opts = self.get_vdisk_params(config, state,
snapshot['volume_type_id'])
self.create_flashcopy_to_consistgrp(snapshot['volume_name'],
snapshot['name'],
fc_consistgrp,
config, opts)
snapshot['status'] = 'available'
self.prepare_fc_consistgrp(fc_consistgrp, timeout)
self.start_fc_consistgrp(fc_consistgrp)
# There is CG limitation that could not create more than 128 CGs.
# After start CG, we delete CG to avoid CG limitation.
# Cinder general will maintain the CG and snapshots relationship.
self.delete_fc_consistgrp(fc_consistgrp)
except exception.VolumeBackendAPIException as err:
for snapshot in snapshots:
snapshot['status'] = 'error'
cgsnapshot['status'] = 'error'
# Release cg
self.delete_fc_consistgrp(fc_consistgrp)
LOG.error(_LE("Failed to create CGSnapshot. "
"Exception: %s."), err)
return cgsnapshot, snapshots
def delete_consistgrp_snapshots(self, fc_consistgrp, snapshots):
"""Delete flashcopy maps and consistent group."""
cgsnapshot = {'status': 'available'}
try:
for snapshot in snapshots:
self.ssh.rmvdisk(snapshot['name'], True)
snapshot['status'] = 'deleted'
except exception.VolumeBackendAPIException as err:
for snapshot in snapshots:
snapshot['status'] = 'error_deleting'
cgsnapshot['status'] = 'error_deleting'
LOG.error(_LE("Failed to delete the snapshot %(snap)s of "
"CGSnapshot. Exception: %(exception)s."),
{'snap': snapshot['name'], 'exception': err})
return cgsnapshot, snapshots
def prepare_fc_consistgrp(self, fc_consistgrp, timeout):
"""Prepare FC Consistency Group."""
self.ssh.prestartfcconsistgrp(fc_consistgrp)
def prepare_fc_consistgrp_success():
mapping_ready = False
mapping_attrs = self._get_flashcopy_consistgrp_attr(fc_consistgrp)
if (mapping_attrs is None or
'status' not in mapping_attrs):
pass
if mapping_attrs['status'] == 'prepared':
mapping_ready = True
elif mapping_attrs['status'] == 'stopped':
self.ssh.prestartfcconsistgrp(fc_consistgrp)
elif mapping_attrs['status'] != 'preparing':
msg = (_('Unexpected mapping status %(status)s for mapping'
'%(id)s. Attributes: %(attr)s.') %
{'status': mapping_attrs['status'],
'id': fc_consistgrp,
'attr': mapping_attrs})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
return mapping_ready
self._wait_for_a_condition(prepare_fc_consistgrp_success, timeout)
def create_cg_from_source(self, group, fc_consistgrp,
sources, targets, state,
config, timeout):
"""Create consistence group from source"""
LOG.debug('Enter: create_cg_from_source: cg %(cg)s'
' source %(source)s, target %(target)s',
{'cg': fc_consistgrp, 'source': sources, 'target': targets})
model_update = {'status': fields.ConsistencyGroupStatus.AVAILABLE}
ctxt = context.get_admin_context()
try:
for source, target in zip(sources, targets):
opts = self.get_vdisk_params(config, state,
source['volume_type_id'])
pool = utils.extract_host(target['host'], 'pool')
self.create_flashcopy_to_consistgrp(source['name'],
target['name'],
fc_consistgrp,
config, opts,
True, pool=pool)
self.prepare_fc_consistgrp(fc_consistgrp, timeout)
self.start_fc_consistgrp(fc_consistgrp)
self.delete_fc_consistgrp(fc_consistgrp)
volumes_model_update = self._get_volume_model_updates(
ctxt, targets, group['id'], model_update['status'])
except exception.VolumeBackendAPIException as err:
model_update['status'] = fields.ConsistencyGroupStatus.ERROR
volumes_model_update = self._get_volume_model_updates(
ctxt, targets, group['id'], model_update['status'])
with excutils.save_and_reraise_exception():
# Release cg
self.delete_fc_consistgrp(fc_consistgrp)
LOG.error(_LE("Failed to create CG from CGsnapshot. "
"Exception: %s"), err)
return model_update, volumes_model_update
LOG.debug('Leave: create_cg_from_source.')
return model_update, volumes_model_update
def _get_volume_model_updates(self, ctxt, volumes, cgId,
status='available'):
"""Update the volume model's status and return it."""
volume_model_updates = []
LOG.info(_LI(
"Updating status for CG: %(id)s."),
{'id': cgId})
if volumes:
for volume in volumes:
volume_model_updates.append({'id': volume['id'],
'status': status})
else:
LOG.info(_LI("No volume found for CG: %(cg)s."),
{'cg': cgId})
return volume_model_updates
def run_flashcopy(self, source, target, timeout, copy_rate,
full_copy=True):
"""Create a FlashCopy mapping from the source to the target."""
LOG.debug('Enter: run_flashcopy: execute FlashCopy from source '
'%(source)s to target %(target)s.',
{'source': source, 'target': target})
fc_map_id = self.ssh.mkfcmap(source, target, full_copy, copy_rate)
self._prepare_fc_map(fc_map_id, timeout)
self.ssh.startfcmap(fc_map_id)
LOG.debug('Leave: run_flashcopy: FlashCopy started from '
'%(source)s to %(target)s.',
{'source': source, 'target': target})
def create_flashcopy_to_consistgrp(self, source, target, consistgrp,
config, opts, full_copy=False,
pool=None):
"""Create a FlashCopy mapping and add to consistent group."""
LOG.debug('Enter: create_flashcopy_to_consistgrp: create FlashCopy'
' from source %(source)s to target %(target)s'
'Then add the flashcopy to %(cg)s.',
{'source': source, 'target': target, 'cg': consistgrp})
src_attrs = self.get_vdisk_attributes(source)
if src_attrs is None:
msg = (_('create_copy: Source vdisk %(src)s '
'does not exist.') % {'src': source})
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
src_size = src_attrs['capacity']
# In case we need to use a specific pool
if not pool:
pool = src_attrs['mdisk_grp_name']
self.create_vdisk(target, src_size, 'b', pool, opts)
self.ssh.mkfcmap(source, target, full_copy,
config.storwize_svc_flashcopy_rate,
consistgrp=consistgrp)
LOG.debug('Leave: create_flashcopy_to_consistgrp: '
'FlashCopy started from %(source)s to %(target)s.',
{'source': source, 'target': target})
def _get_vdisk_fc_mappings(self, vdisk):
"""Return FlashCopy mappings that this vdisk is associated with."""
mapping_ids = []
resp = self.ssh.lsvdiskfcmappings(vdisk)
for id in resp.select('id'):
mapping_ids.append(id)
return mapping_ids
def _get_flashcopy_mapping_attributes(self, fc_map_id):
resp = self.ssh.lsfcmap(fc_map_id)
if not len(resp):
return None
return resp[0]
def _get_flashcopy_consistgrp_attr(self, fc_map_id):
resp = self.ssh.lsfcconsistgrp(fc_map_id)
if not len(resp):
return None
return resp[0]
def _check_vdisk_fc_mappings(self, name, allow_snaps=True):
"""FlashCopy mapping check helper."""
LOG.debug('Loopcall: _check_vdisk_fc_mappings(), vdisk %s.', name)
mapping_ids = self._get_vdisk_fc_mappings(name)
wait_for_copy = False
for map_id in mapping_ids:
attrs = self._get_flashcopy_mapping_attributes(map_id)
if not attrs:
continue
source = attrs['source_vdisk_name']
target = attrs['target_vdisk_name']
copy_rate = attrs['copy_rate']
status = attrs['status']
if copy_rate == '0':
if source == name:
# Vdisk with snapshots. Return False if snapshot
# not allowed.
if not allow_snaps:
raise loopingcall.LoopingCallDone(retvalue=False)
self.ssh.chfcmap(map_id, copyrate='50', autodel='on')
wait_for_copy = True
else:
# A snapshot
if target != name:
msg = (_('Vdisk %(name)s not involved in '
'mapping %(src)s -> %(tgt)s.') %
{'name': name, 'src': source, 'tgt': target})
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
if status in ['copying', 'prepared']:
self.ssh.stopfcmap(map_id)
# Need to wait for the fcmap to change to
# stopped state before remove fcmap
wait_for_copy = True
elif status in ['stopping', 'preparing']:
wait_for_copy = True
else:
self.ssh.rmfcmap(map_id)
# Case 4: Copy in progress - wait and will autodelete
else:
if status == 'prepared':
self.ssh.stopfcmap(map_id)
self.ssh.rmfcmap(map_id)
elif status == 'idle_or_copied':
# Prepare failed
self.ssh.rmfcmap(map_id)
else:
wait_for_copy = True
if not wait_for_copy or not len(mapping_ids):
raise loopingcall.LoopingCallDone(retvalue=True)
def ensure_vdisk_no_fc_mappings(self, name, allow_snaps=True):
"""Ensure vdisk has no flashcopy mappings."""
timer = loopingcall.FixedIntervalLoopingCall(
self._check_vdisk_fc_mappings, name, allow_snaps)
# Create a timer greenthread. The default volume service heart
# beat is every 10 seconds. The flashcopy usually takes hours
# before it finishes. Don't set the sleep interval shorter
# than the heartbeat. Otherwise volume service heartbeat
# will not be serviced.
LOG.debug('Calling _ensure_vdisk_no_fc_mappings: vdisk %s.',
name)
ret = timer.start(interval=self.check_fcmapping_interval).wait()
timer.stop()
return ret
def start_relationship(self, volume_name, primary=None):
vol_attrs = self.get_vdisk_attributes(volume_name)
if vol_attrs['RC_name']:
self.ssh.startrcrelationship(vol_attrs['RC_name'], primary)
def stop_relationship(self, volume_name):
vol_attrs = self.get_vdisk_attributes(volume_name)
if vol_attrs['RC_name']:
self.ssh.stoprcrelationship(vol_attrs['RC_name'], access=True)
def create_relationship(self, master, aux, system, asyncmirror):
name = 'rcrel' + ''.join(random.sample(string.digits, 10))
try:
rc_id = self.ssh.mkrcrelationship(master, aux, system, name,
asyncmirror)
except exception.VolumeBackendAPIException as e:
# CMMVC5959E is the code in Stowize storage, meaning that
# there is a relationship that already has this name on the
# master cluster.
if 'CMMVC5959E' not in e:
# If there is no relation between the primary and the
# secondary back-end storage, the exception is raised.
raise
if rc_id:
self.start_relationship(master)
def delete_relationship(self, volume_name):
vol_attrs = self.get_vdisk_attributes(volume_name)
if vol_attrs['RC_name']:
self.ssh.stoprcrelationship(vol_attrs['RC_name'])
self.ssh.rmrcrelationship(vol_attrs['RC_name'])
vol_attrs = self.get_vdisk_attributes(volume_name)
def get_relationship_info(self, volume):
vol_attrs = self.get_vdisk_attributes(volume['name'])
if not vol_attrs or not vol_attrs['RC_name']:
LOG.info(_LI("Unable to get remote copy information for "
"volume %s"), volume['name'])
return
relationship = self.ssh.lsrcrelationship(vol_attrs['RC_name'])
return relationship[0] if len(relationship) > 0 else None
def switch_relationship(self, relationship, aux=True):
self.ssh.switchrelationship(relationship, aux)
def get_partnership_info(self, system_name):
partnership = self.ssh.lspartnership(system_name)
return partnership[0] if len(partnership) > 0 else None
def get_partnershipcandidate_info(self, system_name):
candidates = self.ssh.lspartnershipcandidate()
for candidate in candidates:
if system_name == candidate['name']:
return candidate
return None
def mkippartnership(self, ip_v4, bandwith=1000):
self.ssh.mkippartnership(ip_v4, bandwith)
def mkfcpartnership(self, system_name, bandwith=1000):
self.ssh.mkfcpartnership(system_name, bandwith)
def startpartnership(self, partnership_id):
self.ssh.startpartnership(partnership_id)
def delete_vdisk(self, vdisk, force):
"""Ensures that vdisk is not part of FC mapping and deletes it."""
LOG.debug('Enter: delete_vdisk: vdisk %s.', vdisk)
if not self.is_vdisk_defined(vdisk):
LOG.info(_LI('Tried to delete non-existent vdisk %s.'), vdisk)
return
self.ensure_vdisk_no_fc_mappings(vdisk)
self.ssh.rmvdisk(vdisk, force=force)
LOG.debug('Leave: delete_vdisk: vdisk %s.', vdisk)
def create_copy(self, src, tgt, src_id, config, opts,
full_copy, pool=None):
"""Create a new snapshot using FlashCopy."""
LOG.debug('Enter: create_copy: snapshot %(src)s to %(tgt)s.',
{'tgt': tgt, 'src': src})
src_attrs = self.get_vdisk_attributes(src)
if src_attrs is None:
msg = (_('create_copy: Source vdisk %(src)s (%(src_id)s) '
'does not exist.') % {'src': src, 'src_id': src_id})
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
src_size = src_attrs['capacity']
# In case we need to use a specific pool
if not pool:
pool = src_attrs['mdisk_grp_name']
self.create_vdisk(tgt, src_size, 'b', pool, opts)
timeout = config.storwize_svc_flashcopy_timeout
try:
self.run_flashcopy(src, tgt, timeout,
config.storwize_svc_flashcopy_rate,
full_copy=full_copy)
except Exception:
with excutils.save_and_reraise_exception():
self.delete_vdisk(tgt, True)
LOG.debug('Leave: _create_copy: snapshot %(tgt)s from '
'vdisk %(src)s.',
{'tgt': tgt, 'src': src})
def extend_vdisk(self, vdisk, amount):
self.ssh.expandvdisksize(vdisk, amount)
def add_vdisk_copy(self, vdisk, dest_pool, volume_type, state, config):
"""Add a vdisk copy in the given pool."""
resp = self.ssh.lsvdiskcopy(vdisk)
if len(resp) > 1:
msg = (_('add_vdisk_copy failed: A copy of volume %s exists. '
'Adding another copy would exceed the limit of '
'2 copies.') % vdisk)
raise exception.VolumeDriverException(message=msg)
orig_copy_id = resp[0].get("copy_id", None)
if orig_copy_id is None:
msg = (_('add_vdisk_copy started without a vdisk copy in the '
'expected pool.'))
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
if volume_type is None:
opts = self.get_vdisk_params(config, state, None)
else:
opts = self.get_vdisk_params(config, state, volume_type['id'],
volume_type=volume_type)
params = self._get_vdisk_create_params(opts)
new_copy_id = self.ssh.addvdiskcopy(vdisk, dest_pool, params)
return (orig_copy_id, new_copy_id)
def is_vdisk_copy_synced(self, vdisk, copy_id):
sync = self.ssh.lsvdiskcopy(vdisk, copy_id=copy_id)[0]['sync']
if sync == 'yes':
return True
return False
def rm_vdisk_copy(self, vdisk, copy_id):
self.ssh.rmvdiskcopy(vdisk, copy_id)
@staticmethod
def can_migrate_to_host(host, state):
if 'location_info' not in host['capabilities']:
return None
info = host['capabilities']['location_info']
try:
(dest_type, dest_id, dest_pool) = info.split(':')
except ValueError:
return None
if (dest_type != 'StorwizeSVCDriver' or dest_id != state['system_id']):
return None
return dest_pool
def add_vdisk_qos(self, vdisk, qos):
"""Add the QoS configuration to the volume."""
for key, value in qos.items():
if key in self.svc_qos_keys.keys():
param = self.svc_qos_keys[key]['param']
self.ssh.chvdisk(vdisk, ['-' + param, str(value)])
def update_vdisk_qos(self, vdisk, qos):
"""Update all the QoS in terms of a key and value.
svc_qos_keys saves all the supported QoS parameters. Going through
this dict, we set the new values to all the parameters. If QoS is
available in the QoS configuration, the value is taken from it;
if not, the value will be set to default.
"""
for key, value in self.svc_qos_keys.items():
param = value['param']
if key in qos.keys():
# If the value is set in QoS, take the value from
# the QoS configuration.
v = qos[key]
else:
# If not, set the value to default.
v = value['default']
self.ssh.chvdisk(vdisk, ['-' + param, str(v)])
def disable_vdisk_qos(self, vdisk, qos):
"""Disable the QoS."""
for key, value in qos.items():
if key in self.svc_qos_keys.keys():
param = self.svc_qos_keys[key]['param']
# Take the default value.
value = self.svc_qos_keys[key]['default']
self.ssh.chvdisk(vdisk, ['-' + param, value])
def change_vdisk_options(self, vdisk, changes, opts, state):
if 'warning' in opts:
opts['warning'] = '%s%%' % str(opts['warning'])
if 'easytier' in opts:
opts['easytier'] = 'on' if opts['easytier'] else 'off'
if 'autoexpand' in opts:
opts['autoexpand'] = 'on' if opts['autoexpand'] else 'off'
for key in changes:
self.ssh.chvdisk(vdisk, ['-' + key, opts[key]])
def change_vdisk_iogrp(self, vdisk, state, iogrp):
if state['code_level'] < (6, 4, 0, 0):
LOG.debug('Ignore change IO group as storage code level is '
'%(code_level)s, below the required 6.4.0.0.',
{'code_level': state['code_level']})
else:
self.ssh.movevdisk(vdisk, str(iogrp[0]))
self.ssh.addvdiskaccess(vdisk, str(iogrp[0]))
self.ssh.rmvdiskaccess(vdisk, str(iogrp[1]))
def vdisk_by_uid(self, vdisk_uid):
"""Returns the properties of the vdisk with the specified UID.
Returns None if no such disk exists.
"""
vdisks = self.ssh.lsvdisks_from_filter('vdisk_UID', vdisk_uid)
if len(vdisks) == 0:
return None
if len(vdisks) != 1:
msg = (_('Expected single vdisk returned from lsvdisk when '
'filtering on vdisk_UID. %(count)s were returned.') %
{'count': len(vdisks)})
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
vdisk = vdisks.result[0]
return self.ssh.lsvdisk(vdisk['name'])
def is_vdisk_in_use(self, vdisk):
"""Returns True if the specified vdisk is mapped to at least 1 host."""
resp = self.ssh.lsvdiskhostmap(vdisk)
return len(resp) != 0
def rename_vdisk(self, vdisk, new_name):
self.ssh.chvdisk(vdisk, ['-name', new_name])
def change_vdisk_primary_copy(self, vdisk, copy_id):
self.ssh.chvdisk(vdisk, ['-primary', copy_id])
class CLIResponse(object):
"""Parse SVC CLI output and generate iterable."""
def __init__(self, raw, ssh_cmd=None, delim='!', with_header=True):
super(CLIResponse, self).__init__()
if ssh_cmd:
self.ssh_cmd = ' '.join(ssh_cmd)
else:
self.ssh_cmd = 'None'
self.raw = raw
self.delim = delim
self.with_header = with_header
self.result = self._parse()
def select(self, *keys):
for a in self.result:
vs = []
for k in keys:
v = a.get(k, None)
if isinstance(v, six.string_types) or v is None:
v = [v]
if isinstance(v, list):
vs.append(v)
for item in zip(*vs):
if len(item) == 1:
yield item[0]
else:
yield item
def __getitem__(self, key):
try:
return self.result[key]
except KeyError:
msg = (_('Did not find the expected key %(key)s in %(fun)s: '
'%(raw)s.') % {'key': key, 'fun': self.ssh_cmd,
'raw': self.raw})
raise exception.VolumeBackendAPIException(data=msg)
def __iter__(self):
for a in self.result:
yield a
def __len__(self):
return len(self.result)
def _parse(self):
def get_reader(content, delim):
for line in content.lstrip().splitlines():
line = line.strip()
if line:
yield line.split(delim)
else:
yield []
if isinstance(self.raw, six.string_types):
stdout, stderr = self.raw, ''
else:
stdout, stderr = self.raw
reader = get_reader(stdout, self.delim)
result = []
if self.with_header:
hds = tuple()
for row in reader:
hds = row
break
for row in reader:
cur = dict()
if len(hds) != len(row):
msg = (_('Unexpected CLI response: header/row mismatch. '
'header: %(header)s, row: %(row)s.')
% {'header': hds,
'row': row})
raise exception.VolumeBackendAPIException(data=msg)
for k, v in zip(hds, row):
CLIResponse.append_dict(cur, k, v)
result.append(cur)
else:
cur = dict()
for row in reader:
if row:
CLIResponse.append_dict(cur, row[0], ' '.join(row[1:]))
elif cur: # start new section
result.append(cur)
cur = dict()
if cur:
result.append(cur)
return result
@staticmethod
def append_dict(dict_, key, value):
key, value = key.strip(), value.strip()
obj = dict_.get(key, None)
if obj is None:
dict_[key] = value
elif isinstance(obj, list):
obj.append(value)
dict_[key] = obj
else:
dict_[key] = [obj, value]
return dict_
class StorwizeSVCCommonDriver(san.SanDriver,
driver.ManageableVD,
driver.ExtendVD, driver.SnapshotVD,
driver.MigrateVD, driver.ReplicaVD,
driver.ConsistencyGroupVD,
driver.CloneableImageVD,
driver.TransferVD):
"""IBM Storwize V7000 SVC abstract base class for iSCSI/FC volume drivers.
Version history:
.. code-block:: none
1.0 - Initial driver
1.1 - FC support, create_cloned_volume, volume type support,
get_volume_stats, minor bug fixes
1.2.0 - Added retype
1.2.1 - Code refactor, improved exception handling
1.2.2 - Fix bug #1274123 (races in host-related functions)
1.2.3 - Fix Fibre Channel connectivity: bug #1279758 (add delim
to lsfabric, clear unused data from connections, ensure
matching WWPNs by comparing lower case
1.2.4 - Fix bug #1278035 (async migration/retype)
1.2.5 - Added support for manage_existing (unmanage is inherited)
1.2.6 - Added QoS support in terms of I/O throttling rate
1.3.1 - Added support for volume replication
1.3.2 - Added support for consistency group
1.3.3 - Update driver to use ABC metaclasses
2.0 - Code refactor, split init file and placed shared methods
for FC and iSCSI within the StorwizeSVCCommonDriver class
2.1 - Added replication V2 support to the global/metro mirror
mode
2.1.1 - Update replication to version 2.1
"""
VERSION = "2.1.1"
VDISKCOPYOPS_INTERVAL = 600
GLOBAL = 'global'
METRO = 'metro'
VALID_REP_TYPES = (GLOBAL, METRO)
FAILBACK_VALUE = 'default'
def __init__(self, *args, **kwargs):
super(StorwizeSVCCommonDriver, self).__init__(*args, **kwargs)
self.configuration.append_config_values(storwize_svc_opts)
self._backend_name = self.configuration.safe_get('volume_backend_name')
self._helpers = StorwizeHelpers(self._run_ssh)
self._vdiskcopyops = {}
self._vdiskcopyops_loop = None
self.protocol = None
self.replication = None
self._state = {'storage_nodes': {},
'enabled_protocols': set(),
'compression_enabled': False,
'available_iogrps': [],
'system_name': None,
'system_id': None,
'code_level': None,
}
self._active_backend_id = kwargs.get('active_backend_id')
# Since there are three replication modes supported by Storwize,
# this dictionary is used to map the replication types to certain
# replications.
self.replications = {}
# One driver can be configured with multiple replication targets
# to failover.
self._replication_targets = []
# This boolean is used to indicate whether this driver is configured
# with replication.
self._replication_enabled = False
# This list is used to save the supported replication modes.
self._supported_replication_types = []
# Storwize has the limitation that can not burst more than 3 new ssh
# connections within 1 second. So slow down the initialization.
time.sleep(1)
def do_setup(self, ctxt):
"""Check that we have all configuration details from the storage."""
LOG.debug('enter: do_setup')
# Get storage system name, id, and code level
self._state.update(self._helpers.get_system_info())
# Get the replication helpers
self.replication = storwize_rep.StorwizeSVCReplication.factory(self)
# Validate that the pool exists
self._validate_pools_exist()
# Check if compression is supported
self._state['compression_enabled'] = (self._helpers.
compression_enabled())
# Get the available I/O groups
self._state['available_iogrps'] = (self._helpers.
get_available_io_groups())
# Get the iSCSI and FC names of the Storwize/SVC nodes
self._state['storage_nodes'] = self._helpers.get_node_info()
# Add the iSCSI IP addresses and WWPNs to the storage node info
self._helpers.add_iscsi_ip_addrs(self._state['storage_nodes'])
self._helpers.add_fc_wwpns(self._state['storage_nodes'])
# For each node, check what connection modes it supports. Delete any
# nodes that do not support any types (may be partially configured).
to_delete = []
for k, node in self._state['storage_nodes'].items():
if ((len(node['ipv4']) or len(node['ipv6']))
and len(node['iscsi_name'])):
node['enabled_protocols'].append('iSCSI')
self._state['enabled_protocols'].add('iSCSI')
if len(node['WWPN']):
node['enabled_protocols'].append('FC')
self._state['enabled_protocols'].add('FC')
if not len(node['enabled_protocols']):
to_delete.append(k)
for delkey in to_delete:
del self._state['storage_nodes'][delkey]
# Build the list of in-progress vdisk copy operations
if ctxt is None:
admin_context = context.get_admin_context()
else:
admin_context = ctxt.elevated()
volumes = self.db.volume_get_all_by_host(admin_context, self.host)
for volume in volumes:
metadata = self.db.volume_admin_metadata_get(admin_context,
volume['id'])
curr_ops = metadata.get('vdiskcopyops', None)
if curr_ops:
ops = [tuple(x.split(':')) for x in curr_ops.split(';')]
self._vdiskcopyops[volume['id']] = ops
# if vdiskcopy exists in database, start the looping call
if len(self._vdiskcopyops) >= 1:
self._vdiskcopyops_loop = loopingcall.FixedIntervalLoopingCall(
self._check_volume_copy_ops)
self._vdiskcopyops_loop.start(interval=self.VDISKCOPYOPS_INTERVAL)
LOG.debug('leave: do_setup')
# v2 replication setup
self._do_replication_setup()
def _validate_pools_exist(self):
# Validate that the pool exists
pools = self.configuration.storwize_svc_volpool_name
for pool in pools:
try:
self._helpers.get_pool_attrs(pool)
except exception.VolumeBackendAPIException:
msg = _('Failed getting details for pool %s.') % pool
raise exception.InvalidInput(reason=msg)
def check_for_setup_error(self):
"""Ensure that the flags are set properly."""
LOG.debug('enter: check_for_setup_error')
# Check that we have the system ID information
if self._state['system_name'] is None:
exception_msg = (_('Unable to determine system name.'))
raise exception.VolumeBackendAPIException(data=exception_msg)
if self._state['system_id'] is None:
exception_msg = (_('Unable to determine system id.'))
raise exception.VolumeBackendAPIException(data=exception_msg)
# Make sure we have at least one node configured
if not len(self._state['storage_nodes']):
msg = _('do_setup: No configured nodes.')
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
if self.protocol not in self._state['enabled_protocols']:
# TODO(mc_nair): improve this error message by looking at
# self._state['enabled_protocols'] to tell user what driver to use
raise exception.InvalidInput(
reason=_('The storage device does not support %(prot)s. '
'Please configure the device to support %(prot)s or '
'switch to a driver using a different protocol.')
% {'prot': self.protocol})
required_flags = ['san_ip', 'san_ssh_port', 'san_login',
'storwize_svc_volpool_name']
for flag in required_flags:
if not self.configuration.safe_get(flag):
raise exception.InvalidInput(reason=_('%s is not set.') % flag)
# Ensure that either password or keyfile were set
if not (self.configuration.san_password or
self.configuration.san_private_key):
raise exception.InvalidInput(
reason=_('Password or SSH private key is required for '
'authentication: set either san_password or '
'san_private_key option.'))
opts = self._helpers.build_default_opts(self.configuration)
self._helpers.check_vdisk_opts(self._state, opts)
LOG.debug('leave: check_for_setup_error')
def _run_ssh(self, cmd_list, check_exit_code=True, attempts=1):
cinder_utils.check_ssh_injection(cmd_list)
command = ' '.join(cmd_list)
if not self.sshpool:
try:
self.sshpool = self._set_up_sshpool(self.configuration.san_ip)
except paramiko.SSHException:
LOG.warning(_LW('Unable to use san_ip to create SSHPool. Now '
'attempting to use storwize_san_secondary_ip '
'to create SSHPool.'))
if self.configuration.storwize_san_secondary_ip is not None:
self.sshpool = self._set_up_sshpool(
self.configuration.storwize_san_secondary_ip)
else:
LOG.warning(_LW('Unable to create SSHPool using san_ip '
'and not able to use '
'storwize_san_secondary_ip since it is '
'not configured.'))
raise
try:
return self._ssh_execute(self.sshpool, command,
check_exit_code, attempts)
except Exception:
# Need to check if creating an SSHPool storwize_san_secondary_ip
# before raising an error.
if self.configuration.storwize_san_secondary_ip is not None:
if (self.sshpool.ip ==
self.configuration.storwize_san_secondary_ip):
LOG.warning(_LW("Unable to execute SSH command with "
"storwize_san_secondary_ip. "
"Attempting to switch IP back "
"to san_ip %s."),
self.configuration.san_ip)
self.sshpool = self._set_up_sshpool(
self.configuration.san_ip)
return self._ssh_execute(self.sshpool, command,
check_exit_code, attempts)
else:
LOG.warning(_LW("Unable to execute SSH command. "
"Attempting to switch IP to %s."),
self.configuration.storwize_san_secondary_ip)
self.sshpool = self._set_up_sshpool(
self.configuration.storwize_san_secondary_ip)
return self._ssh_execute(self.sshpool, command,
check_exit_code, attempts)
else:
LOG.warning(_LW('Unable to execute SSH command. '
'Not able to use '
'storwize_san_secondary_ip since it is '
'not configured.'))
with excutils.save_and_reraise_exception():
LOG.error(_LE("Error running SSH command: %s"),
command)
def _set_up_sshpool(self, ip):
password = self.configuration.san_password
privatekey = self.configuration.san_private_key
min_size = self.configuration.ssh_min_pool_conn
max_size = self.configuration.ssh_max_pool_conn
sshpool = ssh_utils.SSHPool(
ip,
self.configuration.san_ssh_port,
self.configuration.ssh_conn_timeout,
self.configuration.san_login,
password=password,
privatekey=privatekey,
min_size=min_size,
max_size=max_size)
return sshpool
def _ssh_execute(self, sshpool, command,
check_exit_code = True, attempts=1):
try:
with sshpool.item() as ssh:
while attempts > 0:
attempts -= 1
try:
return processutils.ssh_execute(
ssh,
command,
check_exit_code=check_exit_code)
except Exception as e:
LOG.error(_LE('Error has occurred: %s'), e)
last_exception = e
greenthread.sleep(random.randint(20, 500) / 100.0)
try:
raise processutils.ProcessExecutionError(
exit_code=last_exception.exit_code,
stdout=last_exception.stdout,
stderr=last_exception.stderr,
cmd=last_exception.cmd)
except AttributeError:
raise processutils.ProcessExecutionError(
exit_code=-1,
stdout="",
stderr="Error running SSH command",
cmd=command)
except Exception:
with excutils.save_and_reraise_exception():
LOG.error(_LE("Error running SSH command: %s"), command)
def ensure_export(self, ctxt, volume):
"""Check that the volume exists on the storage.
The system does not "export" volumes as a Linux iSCSI target does,
and therefore we just check that the volume exists on the storage.
"""
volume_defined = self._helpers.is_vdisk_defined(volume['name'])
if not volume_defined:
LOG.error(_LE('ensure_export: Volume %s not found on storage.'),
volume['name'])
def create_export(self, ctxt, volume, connector):
model_update = None
return model_update
def remove_export(self, ctxt, volume):
pass
def _get_vdisk_params(self, type_id, volume_type=None,
volume_metadata=None):
return self._helpers.get_vdisk_params(self.configuration,
self._state, type_id,
volume_type=volume_type,
volume_metadata=volume_metadata)
def create_volume(self, volume):
opts = self._get_vdisk_params(volume['volume_type_id'],
volume_metadata=
volume.get('volume_metadata'))
pool = utils.extract_host(volume['host'], 'pool')
self._helpers.create_vdisk(volume['name'], str(volume['size']),
'gb', pool, opts)
if opts['qos']:
self._helpers.add_vdisk_qos(volume['name'], opts['qos'])
model_update = None
ctxt = context.get_admin_context()
rep_type = self._get_volume_replicated_type(ctxt, volume)
# The replication V2 has a higher priority than the replication V1.
# Check if V2 is available first, then check if V1 is available.
if rep_type:
self.replications.get(rep_type).volume_replication_setup(ctxt,
volume)
model_update = {'replication_status': 'enabled'}
elif opts.get('replication'):
model_update = self.replication.create_replica(ctxt, volume)
return model_update
def delete_volume(self, volume):
ctxt = context.get_admin_context()
rep_mirror_type = self._get_volume_replicated_type_mirror(ctxt,
volume)
rep_status = volume.get("replication_status", None)
if rep_mirror_type and rep_status != "failed-over":
self.replications.get(rep_mirror_type).delete_target_volume(
volume)
self._helpers.delete_vdisk(volume['name'], False)
if volume['id'] in self._vdiskcopyops:
del self._vdiskcopyops[volume['id']]
if not len(self._vdiskcopyops):
self._vdiskcopyops_loop.stop()
self._vdiskcopyops_loop = None
def create_snapshot(self, snapshot):
ctxt = context.get_admin_context()
try:
source_vol = self.db.volume_get(ctxt, snapshot['volume_id'])
except Exception:
msg = (_('create_snapshot: get source volume failed.'))
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
pool = utils.extract_host(source_vol['host'], 'pool')
opts = self._get_vdisk_params(source_vol['volume_type_id'])
self._helpers.create_copy(snapshot['volume_name'], snapshot['name'],
snapshot['volume_id'], self.configuration,
opts, False, pool=pool)
def delete_snapshot(self, snapshot):
self._helpers.delete_vdisk(snapshot['name'], False)
def create_volume_from_snapshot(self, volume, snapshot):
if volume['size'] != snapshot['volume_size']:
msg = (_('create_volume_from_snapshot: Source and destination '
'size differ.'))
LOG.error(msg)
raise exception.InvalidInput(message=msg)
opts = self._get_vdisk_params(volume['volume_type_id'],
volume_metadata=
volume.get('volume_metadata'))
pool = utils.extract_host(volume['host'], 'pool')
self._helpers.create_copy(snapshot['name'], volume['name'],
snapshot['id'], self.configuration,
opts, True, pool=pool)
if opts['qos']:
self._helpers.add_vdisk_qos(volume['name'], opts['qos'])
ctxt = context.get_admin_context()
rep_type = self._get_volume_replicated_type(ctxt, volume)
# The replication V2 has a higher priority than the replication V1.
# Check if V2 is available first, then check if V1 is available.
if rep_type and self._replication_enabled:
self.replications.get(rep_type).volume_replication_setup(ctxt,
volume)
return {'replication_status': 'enabled'}
elif opts.get('replication'):
replica_status = self.replication.create_replica(ctxt, volume)
if replica_status:
return replica_status
def create_cloned_volume(self, tgt_volume, src_volume):
"""Creates a clone of the specified volume."""
if src_volume['size'] > tgt_volume['size']:
msg = (_("create_cloned_volume: source volume %(src_vol)s "
"size is %(src_size)dGB and doesn't fit in target "
"volume %(tgt_vol)s of size %(tgt_size)dGB.") %
{'src_vol': src_volume['name'],
'src_size': src_volume['size'],
'tgt_vol': tgt_volume['name'],
'tgt_size': tgt_volume['size']})
LOG.error(msg)
raise exception.InvalidInput(message=msg)
opts = self._get_vdisk_params(tgt_volume['volume_type_id'],
volume_metadata=
tgt_volume.get('volume_metadata'))
pool = utils.extract_host(tgt_volume['host'], 'pool')
self._helpers.create_copy(src_volume['name'], tgt_volume['name'],
src_volume['id'], self.configuration,
opts, True, pool=pool)
# The source volume size is equal to target volume size
# in most of the cases. But in some scenario, the target
# volume size may be bigger than the source volume size.
# SVC does not support flashcopy between two volumes
# with two different size. So use source volume size to
# create target volume first and then extend target
# volume to orginal size.
if tgt_volume['size'] > src_volume['size']:
# extend the new created target volume to expected size.
self._extend_volume_op(tgt_volume, tgt_volume['size'],
src_volume['size'])
if opts['qos']:
self._helpers.add_vdisk_qos(tgt_volume['name'], opts['qos'])
ctxt = context.get_admin_context()
rep_type = self._get_volume_replicated_type(ctxt, tgt_volume)
# The replication V2 has a higher priority than the replication V1.
# Check if V2 is available first, then check if V1 is available.
if rep_type and self._replication_enabled:
self.replications.get(rep_type).volume_replication_setup(
ctxt, tgt_volume)
return {'replication_status': 'enabled'}
elif opts.get('replication'):
replica_status = self.replication.create_replica(ctxt, tgt_volume)
if replica_status:
return replica_status
def extend_volume(self, volume, new_size):
self._extend_volume_op(volume, new_size)
def _extend_volume_op(self, volume, new_size, old_size=None):
LOG.debug('enter: _extend_volume_op: volume %s', volume['id'])
ret = self._helpers.ensure_vdisk_no_fc_mappings(volume['name'],
allow_snaps=False)
if not ret:
msg = (_('_extend_volume_op: Extending a volume with snapshots is '
'not supported.'))
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
if old_size is None:
old_size = volume['size']
extend_amt = int(new_size) - old_size
ctxt = context.get_admin_context()
rep_mirror_type = self._get_volume_replicated_type_mirror(ctxt,
volume)
rep_status = volume.get("replication_status", None)
target_vol_name = None
if rep_mirror_type and rep_status != "failed-over":
try:
rel_info = self._helpers.get_relationship_info(volume)
self._helpers.delete_relationship(volume)
except Exception as e:
msg = (_('Failed to get remote copy information for '
'%(volume)s. Exception: %(err)s.'), {'volume':
volume['id'],
'err': e})
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
if rel_info:
target_vol_name = rel_info.get('aux_vdisk_name')
self.replications.get(rep_mirror_type).extend_target_volume(
target_vol_name, extend_amt)
self._helpers.extend_vdisk(volume['name'], extend_amt)
if rep_mirror_type and rep_status != "failed-over":
self.replications.get(rep_mirror_type).create_relationship(
volume, target_vol_name)
LOG.debug('leave: _extend_volume_op: volume %s', volume['id'])
def add_vdisk_copy(self, volume, dest_pool, vol_type):
return self._helpers.add_vdisk_copy(volume, dest_pool,
vol_type, self._state,
self.configuration)
def _add_vdisk_copy_op(self, ctxt, volume, new_op):
metadata = self.db.volume_admin_metadata_get(ctxt.elevated(),
volume['id'])
curr_ops = metadata.get('vdiskcopyops', None)
if curr_ops:
curr_ops_list = [tuple(x.split(':')) for x in curr_ops.split(';')]
new_ops_list = curr_ops_list.append(new_op)
else:
new_ops_list = [new_op]
new_ops_str = ';'.join([':'.join(x) for x in new_ops_list])
self.db.volume_admin_metadata_update(ctxt.elevated(), volume['id'],
{'vdiskcopyops': new_ops_str},
False)
if volume['id'] in self._vdiskcopyops:
self._vdiskcopyops[volume['id']].append(new_op)
else:
self._vdiskcopyops[volume['id']] = [new_op]
# We added the first copy operation, so start the looping call
if len(self._vdiskcopyops) == 1:
self._vdiskcopyops_loop = loopingcall.FixedIntervalLoopingCall(
self._check_volume_copy_ops)
self._vdiskcopyops_loop.start(interval=self.VDISKCOPYOPS_INTERVAL)
def _rm_vdisk_copy_op(self, ctxt, volume, orig_copy_id, new_copy_id):
try:
self._vdiskcopyops[volume['id']].remove((orig_copy_id,
new_copy_id))
if not len(self._vdiskcopyops[volume['id']]):
del self._vdiskcopyops[volume['id']]
if not len(self._vdiskcopyops):
self._vdiskcopyops_loop.stop()
self._vdiskcopyops_loop = None
except KeyError:
LOG.error(_LE('_rm_vdisk_copy_op: Volume %s does not have any '
'registered vdisk copy operations.'), volume['id'])
return
except ValueError:
LOG.error(_LE('_rm_vdisk_copy_op: Volume %(vol)s does not have '
'the specified vdisk copy operation: orig=%(orig)s '
'new=%(new)s.'),
{'vol': volume['id'], 'orig': orig_copy_id,
'new': new_copy_id})
return
metadata = self.db.volume_admin_metadata_get(ctxt.elevated(),
volume['id'])
curr_ops = metadata.get('vdiskcopyops', None)
if not curr_ops:
LOG.error(_LE('_rm_vdisk_copy_op: Volume metadata %s does not '
'have any registered vdisk copy operations.'),
volume['id'])
return
curr_ops_list = [tuple(x.split(':')) for x in curr_ops.split(';')]
try:
curr_ops_list.remove((orig_copy_id, new_copy_id))
except ValueError:
LOG.error(_LE('_rm_vdisk_copy_op: Volume %(vol)s metadata does '
'not have the specified vdisk copy operation: '
'orig=%(orig)s new=%(new)s.'),
{'vol': volume['id'], 'orig': orig_copy_id,
'new': new_copy_id})
return
if len(curr_ops_list):
new_ops_str = ';'.join([':'.join(x) for x in curr_ops_list])
self.db.volume_admin_metadata_update(ctxt.elevated(), volume['id'],
{'vdiskcopyops': new_ops_str},
False)
else:
self.db.volume_admin_metadata_delete(ctxt.elevated(), volume['id'],
'vdiskcopyops')
def promote_replica(self, ctxt, volume):
return self.replication.promote_replica(volume)
def reenable_replication(self, ctxt, volume):
return self.replication.reenable_replication(volume)
def create_replica_test_volume(self, tgt_volume, src_volume):
if src_volume['size'] != tgt_volume['size']:
msg = (_('create_cloned_volume: Source and destination '
'size differ.'))
LOG.error(msg)
raise exception.InvalidInput(message=msg)
replica_status = self.replication.test_replica(tgt_volume,
src_volume)
return replica_status
def get_replication_status(self, ctxt, volume):
replica_status = None
if self.replication:
replica_status = self.replication.get_replication_status(volume)
return replica_status
def _check_volume_copy_ops(self):
LOG.debug("Enter: update volume copy status.")
ctxt = context.get_admin_context()
copy_items = list(self._vdiskcopyops.items())
for vol_id, copy_ops in copy_items:
try:
volume = self.db.volume_get(ctxt, vol_id)
except Exception:
LOG.warning(_LW('Volume %s does not exist.'), vol_id)
del self._vdiskcopyops[vol_id]
if not len(self._vdiskcopyops):
self._vdiskcopyops_loop.stop()
self._vdiskcopyops_loop = None
continue
for copy_op in copy_ops:
try:
synced = self._helpers.is_vdisk_copy_synced(volume['name'],
copy_op[1])
except Exception:
LOG.info(_LI('_check_volume_copy_ops: Volume %(vol)s does '
'not have the specified vdisk copy '
'operation: orig=%(orig)s new=%(new)s.'),
{'vol': volume['id'], 'orig': copy_op[0],
'new': copy_op[1]})
else:
if synced:
self._helpers.rm_vdisk_copy(volume['name'], copy_op[0])
self._rm_vdisk_copy_op(ctxt, volume, copy_op[0],
copy_op[1])
LOG.debug("Exit: update volume copy status.")
# #### V2.1 replication methods #### #
def failover_host(self, context, volumes, secondary_id=None):
"""Force failover to a secondary replication target."""
self._validate_replication_enabled()
if self.FAILBACK_VALUE == secondary_id:
# In this case the administrator would like to fail back.
volume_update_list = self._replication_failback(context,
volumes)
return None, volume_update_list
# In this case the administrator would like to fail over.
failover_target = None
for target in self._replication_targets:
if target['backend_id'] == secondary_id:
failover_target = target
break
if not failover_target:
msg = _("A valid secondary target MUST be specified in order "
"to failover.")
LOG.error(msg)
raise exception.InvalidReplicationTarget(reason=msg)
target_id = failover_target['backend_id']
volume_update_list = []
for volume in volumes:
rep_type = self._get_volume_replicated_type(context, volume)
if rep_type:
replication = self.replications.get(rep_type)
if replication.target.get('backend_id') == target_id:
# Check if the target backend matches the replication type.
# If so, fail over the volume.
try:
replication.failover_volume_host(context,
volume, target_id)
volume_update_list.append(
{'volume_id': volume['id'],
'updates': {'replication_status': 'failed-over'}})
except exception.VolumeDriverException:
msg = (_LE('Unable to failover to the secondary. '
'Please make sure that the secondary '
'back-end is ready.'))
LOG.error(msg)
volume_update_list.append(
{'volume_id': volume['id'],
'updates': {'replication_status': 'error'}})
else:
# If the volume is not of replicated type, we need to
# force the status into error state so a user knows they
# do not have access to the volume.
volume_update_list.append(
{'volume_id': volume['id'],
'updates': {'status': 'error'}})
return target_id, volume_update_list
def _is_host_ready_for_failback(self, ctxt, volumes):
valid_sync_status = ('consistent_synchronized', 'consistent_stopped',
'synchronized', 'idling')
# Check the status of each volume to see if it is in
# a consistent status.
for volume in volumes:
rep_type = self._get_volume_replicated_type(ctxt, volume)
if rep_type:
replication = self.replications.get(rep_type)
if replication:
status = replication.get_relationship_status(volume)
# We need to make sure of that all the volumes are
# in the valid status to trigger a successful
# fail-back. False will be be returned even if only
# one volume is not ready.
if status not in valid_sync_status:
return False
else:
return False
else:
return False
return True
def _replication_failback(self, ctxt, volumes):
"""Fail back all the volume on the secondary backend."""
if not self._is_host_ready_for_failback(ctxt, volumes):
msg = _("The host is not ready to be failed back. Please "
"resynchronize the volumes and resume replication on the "
"Storwize backends.")
LOG.error(msg)
raise exception.VolumeDriverException(data=msg)
volume_update_list = []
for volume in volumes:
rep_type = self._get_volume_replicated_type(ctxt, volume)
if rep_type:
replication = self.replications.get(rep_type)
replication.replication_failback(volume)
volume_update_list.append(
{'volume_id': volume['id'],
'updates': {'replication_status': 'enabled'}})
else:
volume_update_list.append(
{'volume_id': volume['id'],
'updates': {'status': 'available'}})
return volume_update_list
def _validate_replication_enabled(self):
if not self._replication_enabled:
msg = _("Issuing a fail-over failed because replication is "
"not properly configured.")
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
def _validate_volume_rep_type(self, ctxt, volume):
rep_type = self._get_volume_replicated_type(ctxt, volume)
if not rep_type:
msg = (_("Volume %s is not of replicated type. "
"This volume needs to be of a volume type "
"with the extra spec replication_enabled set "
"to '<is> True' to support replication "
"actions."), volume['id'])
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
if not self._replication_enabled:
msg = _("The back-end where the volume is created "
"does not have replication enabled.")
LOG.error(msg)
raise exception.VolumeBackendAPIException(data=msg)
return rep_type
def _get_volume_replicated_type_mirror(self, ctxt, volume):
rep_type = self._get_volume_replicated_type(ctxt, volume)
if rep_type in self.VALID_REP_TYPES:
return rep_type
else:
return None
def _get_specs_replicated_type(self, volume_type):
replication_type = None
extra_specs = volume_type.get("extra_specs", {})
rep_val = extra_specs.get('replication_enabled')
if rep_val == "<is> True":
replication_type = extra_specs.get('replication_type',
self.GLOBAL)
# The format for replication_type in extra spec is in
# "<in> global". Otherwise, the code will
# not reach here.
if replication_type != self.GLOBAL:
# Pick up the replication type specified in the
# extra spec from the format like "<in> global".
replication_type = replication_type.split()[1]
if replication_type not in self.VALID_REP_TYPES:
replication_type = None
return replication_type
def _get_volume_replicated_type(self, ctxt, volume):
replication_type = None
if volume.get("volume_type_id"):
volume_type = volume_types.get_volume_type(
ctxt, volume["volume_type_id"])
replication_type = self._get_specs_replicated_type(volume_type)
return replication_type
def _do_replication_setup(self):
replication_devices = self.configuration.replication_device
if replication_devices:
replication_targets = []
for dev in replication_devices:
remote_array = {}
remote_array['managed_backend_name'] = (
dev.get('managed_backend_name'))
if not remote_array['managed_backend_name']:
raise exception.InvalidConfigurationValue(
option='managed_backend_name',
value=remote_array['managed_backend_name'])
rep_mode = dev.get('replication_mode')
remote_array['replication_mode'] = rep_mode
remote_array['san_ip'] = (
dev.get('san_ip'))
remote_array['backend_id'] = (
dev.get('backend_id'))
remote_array['san_login'] = (
dev.get('san_login'))
remote_array['san_password'] = (
dev.get('san_password'))
remote_array['pool_name'] = (
dev.get('pool_name'))
replication_targets.append(remote_array)
# Each replication type will have a coresponding replication.
self.create_replication_types(replication_targets)
if len(self._supported_replication_types) > 0:
self._replication_enabled = True
def create_replication_types(self, replication_targets):
for target in replication_targets:
rep_type = target['replication_mode']
if (rep_type in self.VALID_REP_TYPES
and rep_type not in self.replications.keys()):
replication = self.replication_factory(rep_type, target)
try:
replication.establish_target_partnership()
except exception.VolumeDriverException:
msg = (_LE('The replication mode of %(type)s has not '
'successfully established partnership '
'with the replica Storwize target %(stor)s.'),
{'type': rep_type,
'stor': target['backend_id']})
LOG.error(msg)
continue
self.replications[rep_type] = replication
self._replication_targets.append(target)
self._supported_replication_types.append(rep_type)
def replication_factory(self, replication_type, rep_target):
"""Use replication methods for the requested mode."""
if replication_type == self.GLOBAL:
return storwize_rep.StorwizeSVCReplicationGlobalMirror(
self, rep_target, StorwizeHelpers)
if replication_type == self.METRO:
return storwize_rep.StorwizeSVCReplicationMetroMirror(
self, rep_target, StorwizeHelpers)
def migrate_volume(self, ctxt, volume, host):
"""Migrate directly if source and dest are managed by same storage.
We create a new vdisk copy in the desired pool, and add the original
vdisk copy to the admin_metadata of the volume to be deleted. The
deletion will occur using a periodic task once the new copy is synced.
:param ctxt: Context
:param volume: A dictionary describing the volume to migrate
:param host: A dictionary describing the host to migrate to, where
host['host'] is its name, and host['capabilities'] is a
dictionary of its reported capabilities.
"""
LOG.debug('enter: migrate_volume: id=%(id)s, host=%(host)s',
{'id': volume['id'], 'host': host['host']})
false_ret = (False, None)
dest_pool = self._helpers.can_migrate_to_host(host, self._state)
if dest_pool is None:
return false_ret
ctxt = context.get_admin_context()
volume_type_id = volume['volume_type_id']
if volume_type_id is not None:
vol_type = volume_types.get_volume_type(ctxt, volume_type_id)
else:
vol_type = None
self._check_volume_copy_ops()
new_op = self.add_vdisk_copy(volume['name'], dest_pool, vol_type)
self._add_vdisk_copy_op(ctxt, volume, new_op)
LOG.debug('leave: migrate_volume: id=%(id)s, host=%(host)s',
{'id': volume['id'], 'host': host['host']})
return (True, None)
def retype(self, ctxt, volume, new_type, diff, host):
"""Convert the volume to be of the new type.
Returns a boolean indicating whether the retype occurred.
:param ctxt: Context
:param volume: A dictionary describing the volume to migrate
:param new_type: A dictionary describing the volume type to convert to
:param diff: A dictionary with the difference between the two types
:param host: A dictionary describing the host to migrate to, where
host['host'] is its name, and host['capabilities'] is a
dictionary of its reported capabilities.
"""
def retype_iogrp_property(volume, new, old):
if new != old:
self._helpers.change_vdisk_iogrp(volume['name'],
self._state, (new, old))
LOG.debug('enter: retype: id=%(id)s, new_type=%(new_type)s,'
'diff=%(diff)s, host=%(host)s', {'id': volume['id'],
'new_type': new_type,
'diff': diff,
'host': host})
no_copy_keys = ['warning', 'autoexpand', 'easytier']
copy_keys = ['rsize', 'grainsize', 'compression']
all_keys = no_copy_keys + copy_keys
old_opts = self._get_vdisk_params(volume['volume_type_id'],
volume_metadata=
volume.get('volume_matadata'))
new_opts = self._get_vdisk_params(new_type['id'],
volume_type=new_type)
# Check if retype affects volume replication
model_update = None
old_type_replication = old_opts.get('replication', False)
new_type_replication = new_opts.get('replication', False)
# Delete replica if needed
if old_type_replication and not new_type_replication:
self.replication.delete_replica(volume)
model_update = {'replication_status': 'disabled',
'replication_driver_data': None,
'replication_extended_status': None}
vdisk_changes = []
need_copy = False
for key in all_keys:
if old_opts[key] != new_opts[key]:
if key in copy_keys:
need_copy = True
break
elif key in no_copy_keys:
vdisk_changes.append(key)
if (utils.extract_host(volume['host'], 'pool') !=
utils.extract_host(host['host'], 'pool')):
need_copy = True
if need_copy:
self._check_volume_copy_ops()
dest_pool = self._helpers.can_migrate_to_host(host, self._state)
if dest_pool is None:
return False
# If volume is replicated, can't copy
if new_type_replication:
msg = (_('Unable to retype: Current action needs volume-copy,'
' it is not allowed when new type is replication.'
' Volume = %s'), volume['id'])
raise exception.VolumeDriverException(message=msg)
retype_iogrp_property(volume,
new_opts['iogrp'],
old_opts['iogrp'])
try:
new_op = self.add_vdisk_copy(volume['name'],
dest_pool,
new_type)
self._add_vdisk_copy_op(ctxt, volume, new_op)
except exception.VolumeDriverException:
# roll back changing iogrp property
retype_iogrp_property(volume, old_opts['iogrp'],
new_opts['iogrp'])
msg = (_('Unable to retype: A copy of volume %s exists. '
'Retyping would exceed the limit of 2 copies.'),
volume['id'])
raise exception.VolumeDriverException(message=msg)
else:
retype_iogrp_property(volume, new_opts['iogrp'], old_opts['iogrp'])
self._helpers.change_vdisk_options(volume['name'], vdisk_changes,
new_opts, self._state)
if new_opts['qos']:
# Add the new QoS setting to the volume. If the volume has an
# old QoS setting, it will be overwritten.
self._helpers.update_vdisk_qos(volume['name'], new_opts['qos'])
elif old_opts['qos']:
# If the old_opts contain QoS keys, disable them.
self._helpers.disable_vdisk_qos(volume['name'], old_opts['qos'])
# Add replica if needed
if not old_type_replication and new_type_replication:
model_update = self.replication.create_replica(ctxt, volume,
new_type)
LOG.debug('exit: retype: ild=%(id)s, new_type=%(new_type)s,'
'diff=%(diff)s, host=%(host)s', {'id': volume['id'],
'new_type': new_type,
'diff': diff,
'host': host['host']})
return True, model_update
def update_migrated_volume(self, ctxt, volume, new_volume,
original_volume_status):
"""Return model update from Storwize for migrated volume.
This method should rename the back-end volume name(id) on the
destination host back to its original name(id) on the source host.
:param ctxt: The context used to run the method update_migrated_volume
:param volume: The original volume that was migrated to this backend
:param new_volume: The migration volume object that was created on
this backend as part of the migration process
:param original_volume_status: The status of the original volume
:returns: model_update to update DB with any needed changes
"""
current_name = CONF.volume_name_template % new_volume['id']
original_volume_name = CONF.volume_name_template % volume['id']
try:
self._helpers.rename_vdisk(current_name, original_volume_name)
except exception.VolumeBackendAPIException:
LOG.error(_LE('Unable to rename the logical volume '
'for volume: %s'), volume['id'])
return {'_name_id': new_volume['_name_id'] or new_volume['id']}
# If the back-end name(id) for the volume has been renamed,
# it is OK for the volume to keep the original name(id) and there is
# no need to use the column "_name_id" to establish the mapping
# relationship between the volume id and the back-end volume
# name(id).
# Set the key "_name_id" to None for a successful rename.
model_update = {'_name_id': None}
return model_update
def manage_existing(self, volume, ref):
"""Manages an existing vdisk.
Renames the vdisk to match the expected name for the volume.
Error checking done by manage_existing_get_size is not repeated -
if we got here then we have a vdisk that isn't in use (or we don't
care if it is in use.
"""
# Check that the reference is valid
vdisk = self._manage_input_check(ref)
vdisk_io_grp = self._helpers.get_volume_io_group(vdisk['name'])
if vdisk_io_grp not in self._state['available_iogrps']:
msg = (_("Failed to manage existing volume due to "
"the volume to be managed is not in a valid "
"I/O group."))
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
if volume['volume_type_id']:
opts = self._get_vdisk_params(volume['volume_type_id'],
volume_metadata=
volume.get('volume_metadata'))
vdisk_copy = self._helpers.get_vdisk_copy_attrs(vdisk['name'], '0')
if vdisk_copy['autoexpand'] == 'on' and opts['rsize'] == -1:
msg = (_("Failed to manage existing volume due to "
"the volume to be managed is thin, but "
"the volume type chosen is thick."))
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
if not vdisk_copy['autoexpand'] and opts['rsize'] != -1:
msg = (_("Failed to manage existing volume due to "
"the volume to be managed is thick, but "
"the volume type chosen is thin."))
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
if (vdisk_copy['compressed_copy'] == 'no' and
opts['compression']):
msg = (_("Failed to manage existing volume due to the "
"volume to be managed is not compress, but "
"the volume type chosen is compress."))
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
if (vdisk_copy['compressed_copy'] == 'yes' and
not opts['compression']):
msg = (_("Failed to manage existing volume due to the "
"volume to be managed is compress, but "
"the volume type chosen is not compress."))
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
if vdisk_io_grp != opts['iogrp']:
msg = (_("Failed to manage existing volume due to "
"I/O group mismatch. The I/O group of the "
"volume to be managed is %(vdisk_iogrp)s. I/O group"
"of the chosen type is %(opt_iogrp)s.") %
{'vdisk_iogrp': vdisk['IO_group_name'],
'opt_iogrp': opts['iogrp']})
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
pool = utils.extract_host(volume['host'], 'pool')
if vdisk['mdisk_grp_name'] != pool:
msg = (_("Failed to manage existing volume due to the "
"pool of the volume to be managed does not "
"match the backend pool. Pool of the "
"volume to be managed is %(vdisk_pool)s. Pool "
"of the backend is %(backend_pool)s.") %
{'vdisk_pool': vdisk['mdisk_grp_name'],
'backend_pool':
self.configuration.storwize_svc_volpool_name})
raise exception.ManageExistingVolumeTypeMismatch(reason=msg)
self._helpers.rename_vdisk(vdisk['name'], volume['name'])
def manage_existing_get_size(self, volume, ref):
"""Return size of an existing Vdisk for manage_existing.
existing_ref is a dictionary of the form:
{'source-id': <uid of disk>} or
{'source-name': <name of the disk>}
Optional elements are:
'manage_if_in_use': True/False (default is False)
If set to True, a volume will be managed even if it is currently
attached to a host system.
"""
# Check that the reference is valid
vdisk = self._manage_input_check(ref)
# Check if the disk is in use, if we need to.
manage_if_in_use = ref.get('manage_if_in_use', False)
if (not manage_if_in_use and
self._helpers.is_vdisk_in_use(vdisk['name'])):
reason = _('The specified vdisk is mapped to a host.')
raise exception.ManageExistingInvalidReference(existing_ref=ref,
reason=reason)
return int(math.ceil(float(vdisk['capacity']) / units.Gi))
def unmanage(self, volume):
"""Remove the specified volume from Cinder management."""
pass
def get_volume_stats(self, refresh=False):
"""Get volume stats.
If we haven't gotten stats yet or 'refresh' is True,
run update the stats first.
"""
if not self._stats or refresh:
self._update_volume_stats()
return self._stats
def create_consistencygroup(self, context, group):
"""Create a consistency group.
IBM Storwize will create CG until cg-snapshot creation,
db will maintain the volumes and CG relationship.
"""
LOG.debug("Creating consistency group.")
model_update = {'status': fields.ConsistencyGroupStatus.AVAILABLE}
return model_update
def delete_consistencygroup(self, context, group, volumes):
"""Deletes a consistency group.
IBM Storwize will delete the volumes of the CG.
"""
LOG.debug("Deleting consistency group.")
model_update = {}
model_update['status'] = fields.ConsistencyGroupStatus.DELETED
volumes = self.db.volume_get_all_by_group(context, group['id'])
for volume in volumes:
try:
self._helpers.delete_vdisk(volume['name'], True)
volume['status'] = 'deleted'
except exception.VolumeBackendAPIException as err:
volume['status'] = 'error_deleting'
if model_update['status'] != 'error_deleting':
model_update['status'] = 'error_deleting'
LOG.error(_LE("Failed to delete the volume %(vol)s of CG. "
"Exception: %(exception)s."),
{'vol': volume['name'], 'exception': err})
return model_update, volumes
def update_consistencygroup(self, ctxt, group, add_volumes,
remove_volumes):
"""Adds or removes volume(s) to/from an existing consistency group."""
LOG.debug("Updating consistency group.")
return None, None, None
def create_consistencygroup_from_src(self, context, group, volumes,
cgsnapshot=None, snapshots=None,
source_cg=None, source_vols=None):
"""Creates a consistencygroup from source.
:param context: the context of the caller.
:param group: the dictionary of the consistency group to be created.
:param volumes: a list of volume dictionaries in the group.
:param cgsnapshot: the dictionary of the cgsnapshot as source.
:param snapshots: a list of snapshot dictionaries in the cgsnapshot.
:param source_cg: the dictionary of a consistency group as source.
:param source_vols: a list of volume dictionaries in the source_cg.
:returns: model_update, volumes_model_update
"""
LOG.debug('Enter: create_consistencygroup_from_src.')
if cgsnapshot and snapshots:
cg_name = 'cg-' + cgsnapshot.id
sources = snapshots
elif source_cg and source_vols:
cg_name = 'cg-' + source_cg.id
sources = source_vols
else:
error_msg = _("create_consistencygroup_from_src must be "
"creating from a CG snapshot, or a source CG.")
raise exception.InvalidInput(reason=error_msg)
LOG.debug('create_consistencygroup_from_src: cg_name %(cg_name)s'
' %(sources)s', {'cg_name': cg_name, 'sources': sources})
self._helpers.create_fc_consistgrp(cg_name)
timeout = self.configuration.storwize_svc_flashcopy_timeout
model_update, snapshots_model = (
self._helpers.create_cg_from_source(group,
cg_name,
sources,
volumes,
self._state,
self.configuration,
timeout))
LOG.debug("Leave: create_consistencygroup_from_src.")
return model_update, snapshots_model
def create_cgsnapshot(self, ctxt, cgsnapshot, snapshots):
"""Creates a cgsnapshot."""
# Use cgsnapshot id as cg name
cg_name = 'cg_snap-' + cgsnapshot['id']
# Create new cg as cg_snapshot
self._helpers.create_fc_consistgrp(cg_name)
snapshots = self.db.snapshot_get_all_for_cgsnapshot(
ctxt, cgsnapshot['id'])
timeout = self.configuration.storwize_svc_flashcopy_timeout
model_update, snapshots_model = (
self._helpers.run_consistgrp_snapshots(cg_name,
snapshots,
self._state,
self.configuration,
timeout))
return model_update, snapshots_model
def delete_cgsnapshot(self, context, cgsnapshot, snapshots):
"""Deletes a cgsnapshot."""
cgsnapshot_id = cgsnapshot['id']
cg_name = 'cg_snap-' + cgsnapshot_id
snapshots = self.db.snapshot_get_all_for_cgsnapshot(context,
cgsnapshot_id)
model_update, snapshots_model = (
self._helpers.delete_consistgrp_snapshots(cg_name,
snapshots))
return model_update, snapshots_model
def get_pool(self, volume):
attr = self._helpers.get_vdisk_attributes(volume['name'])
if attr is None:
msg = (_('get_pool: Failed to get attributes for volume '
'%s') % volume['name'])
LOG.error(msg)
raise exception.VolumeDriverException(message=msg)
return attr['mdisk_grp_name']
def _update_volume_stats(self):
"""Retrieve stats info from volume group."""
LOG.debug("Updating volume stats.")
data = {}
data['vendor_name'] = 'IBM'
data['driver_version'] = self.VERSION
data['storage_protocol'] = self.protocol
data['pools'] = []
backend_name = self.configuration.safe_get('volume_backend_name')
data['volume_backend_name'] = (backend_name or
self._state['system_name'])
data['pools'] = [self._build_pool_stats(pool)
for pool in
self.configuration.storwize_svc_volpool_name]
data['replication'] = self._replication_enabled
data['replication_enabled'] = self._replication_enabled
data['replication_targets'] = self._get_replication_targets(),
self._stats = data
def _build_pool_stats(self, pool):
"""Build pool status"""
QoS_support = True
pool_stats = {}
try:
pool_data = self._helpers.get_pool_attrs(pool)
if pool_data:
easy_tier = pool_data['easy_tier'] in ['on', 'auto']
total_capacity_gb = float(pool_data['capacity']) / units.Gi
free_capacity_gb = float(pool_data['free_capacity']) / units.Gi
allocated_capacity_gb = (float(pool_data['used_capacity']) /
units.Gi)
provisioned_capacity_gb = float(
pool_data['virtual_capacity']) / units.Gi
rsize = self.configuration.safe_get(
'storwize_svc_vol_rsize')
# rsize of -1 or 100 means fully allocate the mdisk
use_thick_provisioning = rsize == -1 or rsize == 100
over_sub_ratio = self.configuration.safe_get(
'max_over_subscription_ratio')
location_info = ('StorwizeSVCDriver:%(sys_id)s:%(pool)s' %
{'sys_id': self._state['system_id'],
'pool': pool_data['name']})
multiattach = (self.configuration.
storwize_svc_multihostmap_enabled)
pool_stats = {
'pool_name': pool_data['name'],
'total_capacity_gb': total_capacity_gb,
'free_capacity_gb': free_capacity_gb,
'allocated_capacity_gb': allocated_capacity_gb,
'provisioned_capacity_gb': provisioned_capacity_gb,
'compression_support': self._state['compression_enabled'],
'reserved_percentage':
self.configuration.reserved_percentage,
'QoS_support': QoS_support,
'consistencygroup_support': True,
'location_info': location_info,
'easytier_support': easy_tier,
'multiattach': multiattach,
'thin_provisioning_support': not use_thick_provisioning,
'thick_provisioning_support': use_thick_provisioning,
'max_over_subscription_ratio': over_sub_ratio,
}
if self._replication_enabled:
pool_stats.update({
'replication_enabled': self._replication_enabled,
'replication_type': self._supported_replication_types,
'replication_targets': self._get_replication_targets(),
'replication_count': len(self._replication_targets)
})
elif self.replication:
pool_stats.update(self.replication.get_replication_info())
except exception.VolumeBackendAPIException:
msg = _('Failed getting details for pool %s.') % pool
raise exception.VolumeBackendAPIException(data=msg)
return pool_stats
def _get_replication_targets(self):
return [target['backend_id'] for target in self._replication_targets]
def _manage_input_check(self, ref):
"""Verify the input of manage function."""
# Check that the reference is valid
if 'source-name' in ref:
manage_source = ref['source-name']
vdisk = self._helpers.get_vdisk_attributes(manage_source)
elif 'source-id' in ref:
manage_source = ref['source-id']
vdisk = self._helpers.vdisk_by_uid(manage_source)
else:
reason = _('Reference must contain source-id or '
'source-name element.')
raise exception.ManageExistingInvalidReference(existing_ref=ref,
reason=reason)
if vdisk is None:
reason = (_('No vdisk with the UID specified by ref %s.')
% manage_source)
raise exception.ManageExistingInvalidReference(existing_ref=ref,
reason=reason)
return vdisk
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