241 lines
9.5 KiB
Python
241 lines
9.5 KiB
Python
#
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# Copyright (c) 2013-2014 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# All Rights Reserved.
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#
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""" inventory ipv Utilities and helper functions."""
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import json
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import subprocess
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import sys
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from sysinv.common import constants
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from sysinv.common import exception
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from sysinv.common import utils as cutils
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from sysinv.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class PVOperator(object):
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'''Class to encapsulate Physical Volume operations for System Inventory'''
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def __init__(self):
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pass
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def handle_exception(self, e):
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traceback = sys.exc_info()[-1]
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LOG.error("%s @ %s:%s" % (e, traceback.tb_frame.f_code.co_filename,
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traceback.tb_lineno))
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def ipv_get(self, cinder_device=None):
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'''Enumerate physical volume topology based on:
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:param self
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:param cinder_device: by-path of cinder device
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:returns list of physical volumes and attributes
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'''
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ipv = []
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# keys: matching the field order of pvdisplay command
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string_keys = ['lvm_pv_name', 'lvm_vg_name', 'lvm_pv_uuid',
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'lvm_pv_size', 'lvm_pe_total', 'lvm_pe_alloced']
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# keys that need to be translated into ints
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int_keys = ['lvm_pv_size', 'lvm_pe_total', 'lvm_pe_alloced']
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# pvdisplay command to retrieve the pv data of all pvs present
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pvdisplay_command = 'pvdisplay -C --separator=";" -o pv_name,vg_name,pv_uuid'\
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',pv_size,pv_pe_count,pv_pe_alloc_count'\
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' --units B --nosuffix --noheadings'
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# Execute the command
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try:
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pvdisplay_process = subprocess.Popen(pvdisplay_command,
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stdout=subprocess.PIPE,
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shell=True)
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pvdisplay_output = pvdisplay_process.stdout.read()
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except Exception as e:
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self.handle_exception("Could not retrieve pvdisplay "
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"information: %s" % e)
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pvdisplay_output = ""
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# Cinder devices are hidden by global_filter on standby controller,
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# list them separately.
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if cinder_device:
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new_global_filer = ' --config \'devices/global_filter=["a|' + \
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cinder_device + '|","r|.*|"]\''
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pvdisplay_process = pvdisplay_command + new_global_filer
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try:
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pvdisplay_process = subprocess.Popen(pvdisplay_process,
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stdout=subprocess.PIPE,
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shell=True)
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pvdisplay_output = pvdisplay_output + pvdisplay_process.stdout.read()
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except Exception as e:
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self.handle_exception("Could not retrieve vgdisplay "
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"information: %s" % e)
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# parse the output 1 pv/row
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rows = [row for row in pvdisplay_output.split('\n') if row.strip()]
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for row in rows:
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if "unknown device" in row:
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# Found a previously known pv that is now missing
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# This happens when a disk is physically removed without
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# being removed from the volume group first
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# Since the disk is gone we need to forcefully cleanup
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# the volume group
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try:
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values = row.split(';')
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values = [v.strip() for v in values]
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vgreduce_command = 'vgreduce --removemissing %s' % values[2]
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subprocess.Popen(vgreduce_command,
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stdout=subprocess.PIPE,
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shell=True)
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except Exception as e:
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self.handle_exception("Could not execute vgreduce: %s" % e)
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continue
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# get the values of fields as strings
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values = row.split(';')
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values = [v.strip() for v in values]
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# create the dict of attributes
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attr = dict(zip(string_keys, values))
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# convert required values from strings to ints
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for k in int_keys:
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if k in attr.keys():
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attr[k] = int(attr[k])
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# Make sure we have attributes and ignore orphaned PVs
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if attr and attr['lvm_vg_name']:
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# the lvm_pv_name for cinder volumes is always /dev/drbd4
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if attr['lvm_vg_name'] == constants.LVG_CINDER_VOLUMES:
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attr['lvm_pv_name'] = constants.CINDER_DRBD_DEVICE
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for pv in ipv:
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# ignore duplicates
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if pv['lvm_pv_name'] == attr.get('lvm_pv_name'):
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break
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else:
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ipv.append(attr)
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LOG.debug("ipv= %s" % ipv)
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return ipv
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def ipv_delete(self, ipv_dict):
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"""Delete LVM physical volume
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Also delete Logical volume Group if PV is last in group
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:param ipv_dict: values for physical volume object
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:returns: pass or fail
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"""
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LOG.info("Deleting PV: %s" % (ipv_dict))
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if ipv_dict['lvm_vg_name'] == constants.LVG_CINDER_VOLUMES:
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# disable LIO targets before cleaning up volumes
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# as they may keep the volumes busy
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LOG.info("Clearing LIO configuration")
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cutils.execute('targetctl', 'clear',
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run_as_root=True)
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# Note: targets are restored from config file by Cinder
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# on restart. Restarts should done after 'cinder-volumes'
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# re-configuration
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# Check if LVG exists
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stdout, __ = cutils.execute('vgs', '--reportformat', 'json',
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run_as_root=True)
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data = json.loads(stdout)['report']
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LOG.debug("ipv_delete vgs data: %s" % data)
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vgs = []
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for vgs_entry in data:
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if type(vgs_entry) == dict and 'vg' in vgs_entry.keys():
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vgs = vgs_entry['vg']
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break
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for vg in vgs:
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if vg['vg_name'] == ipv_dict['lvm_vg_name']:
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break
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else:
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LOG.info("VG %s not found, "
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"skipping removal" % ipv_dict['lvm_vg_name'])
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vg = None
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# Remove all volumes from volume group before deleting any PV from it
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# (without proper pvmove the data will get corrupted anyway, so better
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# we remove the data while the group is still clean)
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if vg:
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LOG.info("Removing all volumes "
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"from LVG %s" % ipv_dict['lvm_vg_name'])
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# VG exists, should not give any errors
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# (make sure no FD is open when running this)
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# TODO(oponcea): Run pvmove if multiple PVs are
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# associated with the same LVG to avoid data loss
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cutils.execute('lvremove',
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ipv_dict['lvm_vg_name'],
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'-f',
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run_as_root=True)
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# Check if PV exists
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stdout, __ = cutils.execute('pvs', '--reportformat', 'json',
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run_as_root=True)
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data = json.loads(stdout)['report']
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LOG.debug("ipv_delete pvs data: %s" % data)
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pvs = []
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for pvs_entry in data:
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if type(pvs_entry) == dict and 'pv' in pvs_entry.keys():
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for pv in pvs:
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pvs = vgs_entry['pv']
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break
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for pv in pvs:
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if (pv['vg_name'] == ipv_dict['lvm_vg_name'] and
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pv['pv_name'] == ipv_dict['lvm_pv_name']):
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break
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else:
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pv = None
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# Removing PV. VG goes down with it if last PV is removed from it
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if pv:
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parm = {'dev': ipv_dict['lvm_pv_name'],
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'vg': ipv_dict['lvm_vg_name']}
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if (pv['vg_name'] == ipv_dict['lvm_vg_name'] and
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pv['pv_name'] == ipv_dict['lvm_pv_name']):
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LOG.info("Removing PV %(dev)s "
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"from LVG %(vg)s" % parm)
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cutils.execute('pvremove',
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ipv_dict['lvm_pv_name'],
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'--force',
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'--force',
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'-y',
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run_as_root=True)
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else:
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LOG.warn("PV %(dev)s from LVG %(vg)s not found, "
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"nothing to remove!" % parm)
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try:
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cutils.disk_wipe(ipv_dict['idisk_device_node'])
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# Clean up the directory used by the volume group otherwise VG
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# creation will fail without a reboot
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vgs, __ = cutils.execute('vgs', '--noheadings',
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'-o', 'vg_name',
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run_as_root=True)
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vgs = [v.strip() for v in vgs.split("\n")]
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if ipv_dict['lvm_vg_name'] not in vgs:
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cutils.execute('rm', '-rf',
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'/dev/%s' % ipv_dict['lvm_vg_name'])
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except exception.ProcessExecutionError as e:
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LOG.warning("Continuing after wipe command returned exit code: "
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"%(exit_code)s stdout: %(stdout)s err: %(stderr)s" %
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{'exit_code': e.exit_code,
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'stdout': e.stdout,
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'stderr': e.stderr})
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LOG.info("Deleting PV: %s completed" % (ipv_dict))
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