1750 lines
74 KiB
Python
1750 lines
74 KiB
Python
# Copyright (c) 2014 Pure Storage, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Volume driver for Pure Storage FlashArray storage system.
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This driver requires Purity version 4.0.0 or later.
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"""
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import math
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import re
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import uuid
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import excutils
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from oslo_utils import units
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import six
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from cinder import context
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from cinder import exception
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from cinder.i18n import _, _LE, _LI, _LW
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from cinder.objects import fields
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from cinder import utils
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from cinder.volume import driver
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from cinder.volume.drivers.san import san
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from cinder.volume import utils as volume_utils
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from cinder.volume import volume_types
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from cinder.zonemanager import utils as fczm_utils
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try:
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from purestorage import purestorage
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except ImportError:
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purestorage = None
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LOG = logging.getLogger(__name__)
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PURE_OPTS = [
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cfg.StrOpt("pure_api_token",
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help="REST API authorization token."),
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cfg.BoolOpt("pure_automatic_max_oversubscription_ratio",
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default=True,
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help="Automatically determine an oversubscription ratio based "
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"on the current total data reduction values. If used "
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"this calculated value will override the "
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"max_over_subscription_ratio config option."),
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# These are used as default settings. In future these can be overridden
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# by settings in volume-type.
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cfg.IntOpt("pure_replica_interval_default", default=900,
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help="Snapshot replication interval in seconds."),
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cfg.IntOpt("pure_replica_retention_short_term_default", default=14400,
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help="Retain all snapshots on target for this "
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"time (in seconds.)"),
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cfg.IntOpt("pure_replica_retention_long_term_per_day_default", default=3,
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help="Retain how many snapshots for each day."),
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cfg.IntOpt("pure_replica_retention_long_term_default", default=7,
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help="Retain snapshots per day on target for this time "
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"(in days.)"),
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cfg.BoolOpt("pure_eradicate_on_delete",
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default=False,
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help="When enabled, all Pure volumes, snapshots, and "
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"protection groups will be eradicated at the time of "
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"deletion in Cinder. Data will NOT be recoverable after "
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"a delete with this set to True! When disabled, volumes "
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"and snapshots will go into pending eradication state "
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"and can be recovered."
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)
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]
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CONF = cfg.CONF
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CONF.register_opts(PURE_OPTS)
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INVALID_CHARACTERS = re.compile(r"[^-a-zA-Z0-9]")
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GENERATED_NAME = re.compile(r".*-[a-f0-9]{32}-cinder$")
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REPLICATION_CG_NAME = "cinder-group"
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CHAP_SECRET_KEY = "PURE_TARGET_CHAP_SECRET"
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ERR_MSG_NOT_EXIST = "does not exist"
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ERR_MSG_NO_SUCH_SNAPSHOT = "No such volume or snapshot"
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ERR_MSG_PENDING_ERADICATION = "has been destroyed"
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ERR_MSG_ALREADY_EXISTS = "already exists"
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ERR_MSG_COULD_NOT_BE_FOUND = "could not be found"
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ERR_MSG_ALREADY_INCLUDES = "already includes"
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ERR_MSG_ALREADY_ALLOWED = "already allowed on"
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ERR_MSG_NOT_CONNECTED = "is not connected"
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ERR_MSG_ALREADY_BELONGS = "already belongs to"
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EXTRA_SPECS_REPL_ENABLED = "replication_enabled"
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CONNECT_LOCK_NAME = 'PureVolumeDriver_connect'
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UNMANAGED_SUFFIX = '-unmanaged'
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MANAGE_SNAP_REQUIRED_API_VERSIONS = ['1.4', '1.5']
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REPLICATION_REQUIRED_API_VERSIONS = ['1.3', '1.4', '1.5']
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REPL_SETTINGS_PROPAGATE_RETRY_INTERVAL = 5 # 5 seconds
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REPL_SETTINGS_PROPAGATE_MAX_RETRIES = 36 # 36 * 5 = 180 seconds
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def pure_driver_debug_trace(f):
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"""Log the method entrance and exit including active backend name.
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This should only be used on VolumeDriver class methods. It depends on
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having a 'self' argument that is a PureBaseVolumeDriver.
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"""
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def wrapper(*args, **kwargs):
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driver = args[0] # self
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cls_name = driver.__class__.__name__
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method_name = "%(cls_name)s.%(method)s" % {"cls_name": cls_name,
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"method": f.__name__}
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backend_name = driver._get_current_array()._backend_id
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LOG.debug("[%(backend_name)s] Enter %(method_name)s" %
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{"method_name": method_name, "backend_name": backend_name})
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result = f(*args, **kwargs)
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LOG.debug("[%(backend_name)s] Leave %(method_name)s" %
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{"method_name": method_name, "backend_name": backend_name})
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return result
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return wrapper
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class PureBaseVolumeDriver(san.SanDriver):
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"""Performs volume management on Pure Storage FlashArray."""
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SUPPORTED_REST_API_VERSIONS = ['1.2', '1.3', '1.4', '1.5']
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def __init__(self, *args, **kwargs):
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execute = kwargs.pop("execute", utils.execute)
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super(PureBaseVolumeDriver, self).__init__(execute=execute, *args,
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**kwargs)
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self.configuration.append_config_values(PURE_OPTS)
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self._array = None
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self._storage_protocol = None
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self._backend_name = (self.configuration.volume_backend_name or
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self.__class__.__name__)
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self._replication_target_arrays = []
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self._replication_pg_name = REPLICATION_CG_NAME
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self._replication_interval = None
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self._replication_retention_short_term = None
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self._replication_retention_long_term = None
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self._replication_retention_long_term_per_day = None
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self._is_replication_enabled = False
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self._active_backend_id = kwargs.get('active_backend_id', None)
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self._failed_over_primary_array = None
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def parse_replication_configs(self):
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self._replication_interval = (
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self.configuration.pure_replica_interval_default)
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self._replication_retention_short_term = (
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self.configuration.pure_replica_retention_short_term_default)
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self._replication_retention_long_term = (
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self.configuration.pure_replica_retention_long_term_default)
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self._replication_retention_long_term_per_day = (
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self.configuration.
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pure_replica_retention_long_term_per_day_default)
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retention_policy = self._generate_replication_retention()
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replication_devices = self.configuration.safe_get(
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'replication_device')
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primary_array = self._get_current_array()
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if replication_devices:
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for replication_device in replication_devices:
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backend_id = replication_device["backend_id"]
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san_ip = replication_device["san_ip"]
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api_token = replication_device["api_token"]
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verify_https = replication_device.get("ssl_cert_verify", False)
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ssl_cert_path = replication_device.get("ssl_cert_path", None)
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target_array = self._get_flasharray(
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san_ip,
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api_token,
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verify_https=verify_https,
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ssl_cert_path=ssl_cert_path
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)
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target_array._backend_id = backend_id
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LOG.debug("Adding san_ip %(san_ip)s to replication_targets.",
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{"san_ip": san_ip})
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api_version = target_array.get_rest_version()
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if api_version not in REPLICATION_REQUIRED_API_VERSIONS:
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msg = _('Unable to do replication with Purity REST '
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'API version %(api_version)s, requires one of '
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'%(required_versions)s.') % {
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'api_version': api_version,
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'required_versions': REPLICATION_REQUIRED_API_VERSIONS
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}
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raise exception.PureDriverException(reason=msg)
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target_array_info = target_array.get()
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target_array.array_name = target_array_info["array_name"]
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target_array.array_id = target_array_info["id"]
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LOG.debug("secondary array name: %s", target_array.array_name)
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LOG.debug("secondary array id: %s", target_array.array_id)
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self._replication_target_arrays.append(target_array)
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self._setup_replicated_pgroups(primary_array,
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self._replication_target_arrays,
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self._replication_pg_name,
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self._replication_interval,
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retention_policy)
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def do_setup(self, context):
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"""Performs driver initialization steps that could raise exceptions."""
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if purestorage is None:
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msg = _("Missing 'purestorage' python module, ensure the library"
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" is installed and available.")
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raise exception.PureDriverException(msg)
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# Raises PureDriverException if unable to connect and PureHTTPError
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# if unable to authenticate.
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purestorage.FlashArray.supported_rest_versions = \
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self.SUPPORTED_REST_API_VERSIONS
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self._array = self._get_flasharray(
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self.configuration.san_ip,
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api_token=self.configuration.pure_api_token,
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verify_https=self.configuration.driver_ssl_cert_verify,
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ssl_cert_path=self.configuration.driver_ssl_cert_path
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)
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self._array._backend_id = self._backend_name
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LOG.debug("Primary array backend_id: %s",
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self.configuration.config_group)
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LOG.debug("Primary array name: %s", self._array.array_name)
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LOG.debug("Primary array id: %s", self._array.array_id)
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self.do_setup_replication()
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# If we have failed over at some point we need to adjust our current
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# array based on the one that we have failed over to
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if (self._active_backend_id is not None and
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self._active_backend_id != self._array._backend_id):
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for array in self._replication_target_arrays:
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if array._backend_id == self._active_backend_id:
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self._failed_over_primary_array = self._array
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self._array = array
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break
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def do_setup_replication(self):
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replication_devices = self.configuration.safe_get(
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'replication_device')
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if replication_devices:
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self.parse_replication_configs()
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self._is_replication_enabled = True
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def check_for_setup_error(self):
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# Avoid inheriting check_for_setup_error from SanDriver, which checks
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# for san_password or san_private_key, not relevant to our driver.
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pass
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@pure_driver_debug_trace
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def create_volume(self, volume):
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"""Creates a volume."""
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vol_name = self._get_vol_name(volume)
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vol_size = volume["size"] * units.Gi
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current_array = self._get_current_array()
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current_array.create_volume(vol_name, vol_size)
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if volume['consistencygroup_id']:
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self._add_volume_to_consistency_group(
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volume['consistencygroup_id'],
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vol_name
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)
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self._enable_replication_if_needed(current_array, volume)
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@pure_driver_debug_trace
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def create_volume_from_snapshot(self, volume, snapshot):
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"""Creates a volume from a snapshot."""
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vol_name = self._get_vol_name(volume)
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if snapshot['cgsnapshot_id']:
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snap_name = self._get_pgroup_snap_name_from_snapshot(snapshot)
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else:
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snap_name = self._get_snap_name(snapshot)
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if not snap_name:
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msg = _('Unable to determine snapshot name in Purity for snapshot '
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'%(id)s.') % {'id': snapshot['id']}
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raise exception.PureDriverException(reason=msg)
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current_array = self._get_current_array()
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current_array.copy_volume(snap_name, vol_name)
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self._extend_if_needed(current_array,
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vol_name,
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snapshot["volume_size"],
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volume["size"])
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if volume['consistencygroup_id']:
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self._add_volume_to_consistency_group(
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volume['consistencygroup_id'],
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vol_name)
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self._enable_replication_if_needed(current_array, volume)
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def _enable_replication_if_needed(self, array, volume):
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if self._is_volume_replicated_type(volume):
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self._enable_replication(array, volume)
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def _enable_replication(self, array, volume):
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"""Add volume to replicated protection group."""
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try:
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array.set_pgroup(self._replication_pg_name,
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addvollist=[self._get_vol_name(volume)])
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except purestorage.PureHTTPError as err:
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with excutils.save_and_reraise_exception() as ctxt:
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if (err.code == 400 and
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ERR_MSG_ALREADY_BELONGS in err.text):
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# Happens if the volume already added to PG.
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ctxt.reraise = False
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LOG.warning(_LW("Adding Volume to Protection Group "
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"failed with message: %s"), err.text)
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@pure_driver_debug_trace
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def create_cloned_volume(self, volume, src_vref):
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"""Creates a clone of the specified volume."""
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vol_name = self._get_vol_name(volume)
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src_name = self._get_vol_name(src_vref)
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# Check which backend the source volume is on. In case of failover
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# the source volume may be on the secondary array.
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current_array = self._get_current_array()
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current_array.copy_volume(src_name, vol_name)
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self._extend_if_needed(current_array,
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vol_name,
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src_vref["size"],
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volume["size"])
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if volume['consistencygroup_id']:
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self._add_volume_to_consistency_group(
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volume['consistencygroup_id'],
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vol_name)
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self._enable_replication_if_needed(current_array, volume)
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def _extend_if_needed(self, array, vol_name, src_size, vol_size):
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"""Extend the volume from size src_size to size vol_size."""
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if vol_size > src_size:
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vol_size = vol_size * units.Gi
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array.extend_volume(vol_name, vol_size)
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@pure_driver_debug_trace
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def delete_volume(self, volume):
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"""Disconnect all hosts and delete the volume"""
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vol_name = self._get_vol_name(volume)
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current_array = self._get_current_array()
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try:
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connected_hosts = current_array.list_volume_private_connections(
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vol_name)
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for host_info in connected_hosts:
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host_name = host_info["host"]
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self._disconnect_host(current_array, host_name, vol_name)
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current_array.destroy_volume(vol_name)
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if self.configuration.pure_eradicate_on_delete:
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current_array.eradicate_volume(vol_name)
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except purestorage.PureHTTPError as err:
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with excutils.save_and_reraise_exception() as ctxt:
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if (err.code == 400 and
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ERR_MSG_NOT_EXIST in err.text):
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# Happens if the volume does not exist.
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ctxt.reraise = False
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LOG.warning(_LW("Volume deletion failed with message: %s"),
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err.text)
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@pure_driver_debug_trace
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def create_snapshot(self, snapshot):
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"""Creates a snapshot."""
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# Get current array in case we have failed over via replication.
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current_array = self._get_current_array()
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vol_name, snap_suff = self._get_snap_name(snapshot).split(".")
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current_array.create_snapshot(vol_name, suffix=snap_suff)
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@pure_driver_debug_trace
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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# Get current array in case we have failed over via replication.
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current_array = self._get_current_array()
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snap_name = self._get_snap_name(snapshot)
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try:
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current_array.destroy_volume(snap_name)
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if self.configuration.pure_eradicate_on_delete:
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current_array.eradicate_volume(snap_name)
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except purestorage.PureHTTPError as err:
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with excutils.save_and_reraise_exception() as ctxt:
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if err.code == 400 and (
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ERR_MSG_NOT_EXIST in err.text or
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ERR_MSG_NO_SUCH_SNAPSHOT in err.text):
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# Happens if the snapshot does not exist.
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ctxt.reraise = False
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LOG.warning(_LW("Unable to delete snapshot, assuming "
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"already deleted. Error: %s"), err.text)
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def ensure_export(self, context, volume):
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pass
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def create_export(self, context, volume, connector):
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pass
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def initialize_connection(self, volume, connector):
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"""Connect the volume to the specified initiator in Purity.
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This implementation is specific to the host type (iSCSI, FC, etc).
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"""
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raise NotImplementedError
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def _get_host(self, array, connector):
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"""Get a Purity Host that corresponds to the host in the connector.
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This implementation is specific to the host type (iSCSI, FC, etc).
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"""
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raise NotImplementedError
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@utils.synchronized(CONNECT_LOCK_NAME, external=True)
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def _disconnect(self, array, volume, connector, **kwargs):
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vol_name = self._get_vol_name(volume)
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host = self._get_host(array, connector)
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if host:
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host_name = host["name"]
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result = self._disconnect_host(array, host_name, vol_name)
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else:
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LOG.error(_LE("Unable to disconnect host from volume, could not "
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"determine Purity host"))
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result = False
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return result
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@pure_driver_debug_trace
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def terminate_connection(self, volume, connector, **kwargs):
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"""Terminate connection."""
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# Get current array in case we have failed over via replication.
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current_array = self._get_current_array()
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self._disconnect(current_array, volume, connector, **kwargs)
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@pure_driver_debug_trace
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def _disconnect_host(self, array, host_name, vol_name):
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"""Return value indicates if host was deleted on array or not"""
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try:
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array.disconnect_host(host_name, vol_name)
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except purestorage.PureHTTPError as err:
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with excutils.save_and_reraise_exception() as ctxt:
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if err.code == 400 and ERR_MSG_NOT_CONNECTED in err.text:
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# Happens if the host and volume are not connected.
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ctxt.reraise = False
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LOG.error(_LE("Disconnection failed with message: "
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"%(msg)s."), {"msg": err.text})
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if (GENERATED_NAME.match(host_name) and
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not array.list_host_connections(host_name, private=True)):
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LOG.info(_LI("Deleting unneeded host %(host_name)r."),
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{"host_name": host_name})
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try:
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array.delete_host(host_name)
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|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if err.code == 400 and ERR_MSG_NOT_EXIST in err.text:
|
|
# Happens if the host is already deleted.
|
|
# This is fine though, just treat it as a warning.
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Purity host deletion failed: "
|
|
"%(msg)s."), {"msg": err.text})
|
|
return True
|
|
|
|
return False
|
|
|
|
@pure_driver_debug_trace
|
|
def get_volume_stats(self, refresh=False):
|
|
"""Return the current state of the volume service.
|
|
|
|
If 'refresh' is True, run the update first.
|
|
"""
|
|
|
|
if refresh:
|
|
LOG.debug("Updating volume stats.")
|
|
self._update_stats()
|
|
return self._stats
|
|
|
|
def _update_stats(self):
|
|
"""Set self._stats with relevant information."""
|
|
current_array = self._get_current_array()
|
|
|
|
# Collect info from the array
|
|
space_info = current_array.get(space=True)
|
|
perf_info = current_array.get(action='monitor')[0] # Always index 0
|
|
hosts = current_array.list_hosts()
|
|
snaps = current_array.list_volumes(snap=True, pending=True)
|
|
pgroups = current_array.list_pgroups(pending=True)
|
|
|
|
# Perform some translations and calculations
|
|
total_capacity = float(space_info["capacity"]) / units.Gi
|
|
used_space = float(space_info["total"]) / units.Gi
|
|
free_space = float(total_capacity - used_space)
|
|
prov_space, total_vols = self._get_provisioned_space()
|
|
total_hosts = len(hosts)
|
|
total_snaps = len(snaps)
|
|
total_pgroups = len(pgroups)
|
|
provisioned_space = float(prov_space) / units.Gi
|
|
thin_provisioning = self._get_thin_provisioning(provisioned_space,
|
|
used_space)
|
|
|
|
# Start with some required info
|
|
data = dict(
|
|
volume_backend_name=self._backend_name,
|
|
vendor_name='Pure Storage',
|
|
driver_version=self.VERSION,
|
|
storage_protocol=self._storage_protocol,
|
|
)
|
|
|
|
# Add flags for supported features
|
|
data['consistencygroup_support'] = True
|
|
data['thin_provisioning_support'] = True
|
|
data['multiattach'] = True
|
|
|
|
# Add capacity info for scheduler
|
|
data['total_capacity_gb'] = total_capacity
|
|
data['free_capacity_gb'] = free_space
|
|
data['reserved_percentage'] = self.configuration.reserved_percentage
|
|
data['provisioned_capacity'] = provisioned_space
|
|
data['max_over_subscription_ratio'] = thin_provisioning
|
|
|
|
# Add the filtering/goodness functions
|
|
data['filter_function'] = self.get_filter_function()
|
|
data['goodness_function'] = self.get_goodness_function()
|
|
|
|
# Add array metadata counts for filtering and weighing functions
|
|
data['total_volumes'] = total_vols
|
|
data['total_snapshots'] = total_snaps
|
|
data['total_hosts'] = total_hosts
|
|
data['total_pgroups'] = total_pgroups
|
|
|
|
# Add performance stats for filtering and weighing functions
|
|
# IOPS
|
|
data['writes_per_sec'] = perf_info['writes_per_sec']
|
|
data['reads_per_sec'] = perf_info['reads_per_sec']
|
|
|
|
# Bandwidth
|
|
data['input_per_sec'] = perf_info['input_per_sec']
|
|
data['output_per_sec'] = perf_info['output_per_sec']
|
|
|
|
# Latency
|
|
data['usec_per_read_op'] = perf_info['usec_per_read_op']
|
|
data['usec_per_write_op'] = perf_info['usec_per_write_op']
|
|
data['queue_depth'] = perf_info['queue_depth']
|
|
|
|
# Replication
|
|
data["replication_enabled"] = self._is_replication_enabled
|
|
data["replication_type"] = ["async"]
|
|
data["replication_count"] = len(self._replication_target_arrays)
|
|
data["replication_targets"] = [array._backend_id for array
|
|
in self._replication_target_arrays]
|
|
self._stats = data
|
|
|
|
def _get_provisioned_space(self):
|
|
"""Sum up provisioned size of all volumes on array"""
|
|
volumes = self._get_current_array().list_volumes(pending=True)
|
|
return sum(item["size"] for item in volumes), len(volumes)
|
|
|
|
def _get_thin_provisioning(self, provisioned_space, used_space):
|
|
"""Get the current value for the thin provisioning ratio.
|
|
|
|
If pure_automatic_max_oversubscription_ratio is True we will calculate
|
|
a value, if not we will respect the configuration option for the
|
|
max_over_subscription_ratio.
|
|
"""
|
|
if (self.configuration.pure_automatic_max_oversubscription_ratio and
|
|
used_space != 0 and provisioned_space != 0):
|
|
# If array is empty we can not calculate a max oversubscription
|
|
# ratio. In this case we look to the config option as a starting
|
|
# point. Once some volumes are actually created and some data is
|
|
# stored on the array a much more accurate number will be
|
|
# presented based on current usage.
|
|
thin_provisioning = provisioned_space / used_space
|
|
else:
|
|
thin_provisioning = self.configuration.max_over_subscription_ratio
|
|
|
|
return thin_provisioning
|
|
|
|
@pure_driver_debug_trace
|
|
def extend_volume(self, volume, new_size):
|
|
"""Extend volume to new_size."""
|
|
|
|
# Get current array in case we have failed over via replication.
|
|
current_array = self._get_current_array()
|
|
|
|
vol_name = self._get_vol_name(volume)
|
|
new_size = new_size * units.Gi
|
|
current_array.extend_volume(vol_name, new_size)
|
|
|
|
def _add_volume_to_consistency_group(self, consistencygroup_id, vol_name):
|
|
pgroup_name = self._get_pgroup_name_from_id(consistencygroup_id)
|
|
current_array = self._get_current_array()
|
|
current_array.set_pgroup(pgroup_name, addvollist=[vol_name])
|
|
|
|
@pure_driver_debug_trace
|
|
def create_consistencygroup(self, context, group):
|
|
"""Creates a consistencygroup."""
|
|
|
|
current_array = self._get_current_array()
|
|
current_array.create_pgroup(self._get_pgroup_name_from_id(group.id))
|
|
|
|
model_update = {'status': fields.ConsistencyGroupStatus.AVAILABLE}
|
|
return model_update
|
|
|
|
def _create_cg_from_cgsnap(self, volumes, snapshots):
|
|
"""Creates a new consistency group from a cgsnapshot.
|
|
|
|
The new volumes will be consistent with the snapshot.
|
|
"""
|
|
for volume, snapshot in zip(volumes, snapshots):
|
|
self.create_volume_from_snapshot(volume, snapshot)
|
|
|
|
def _create_cg_from_cg(self, group, source_group, volumes, source_vols):
|
|
"""Creates a new consistency group from an existing cg.
|
|
|
|
The new volumes will be in a consistent state, but this requires
|
|
taking a new temporary group snapshot and cloning from that.
|
|
"""
|
|
pgroup_name = self._get_pgroup_name_from_id(source_group.id)
|
|
tmp_suffix = '%s-tmp' % uuid.uuid4()
|
|
tmp_pgsnap_name = '%(pgroup_name)s.%(pgsnap_suffix)s' % {
|
|
'pgroup_name': pgroup_name,
|
|
'pgsnap_suffix': tmp_suffix,
|
|
}
|
|
LOG.debug('Creating temporary Protection Group snapshot %(snap_name)s '
|
|
'while cloning Consistency Group %(source_group)s.',
|
|
{'snap_name': tmp_pgsnap_name,
|
|
'source_group': source_group.id})
|
|
current_array = self._get_current_array()
|
|
current_array.create_pgroup_snapshot(pgroup_name, suffix=tmp_suffix)
|
|
try:
|
|
for source_vol, cloned_vol in zip(source_vols, volumes):
|
|
source_snap_name = self._get_pgroup_vol_snap_name(
|
|
pgroup_name,
|
|
tmp_suffix,
|
|
self._get_vol_name(source_vol)
|
|
)
|
|
cloned_vol_name = self._get_vol_name(cloned_vol)
|
|
current_array.copy_volume(source_snap_name, cloned_vol_name)
|
|
self._add_volume_to_consistency_group(
|
|
group.id,
|
|
cloned_vol_name
|
|
)
|
|
finally:
|
|
self._delete_pgsnapshot(tmp_pgsnap_name)
|
|
|
|
@pure_driver_debug_trace
|
|
def create_consistencygroup_from_src(self, context, group, volumes,
|
|
cgsnapshot=None, snapshots=None,
|
|
source_cg=None, source_vols=None):
|
|
self.create_consistencygroup(context, group)
|
|
if cgsnapshot and snapshots:
|
|
self._create_cg_from_cgsnap(volumes,
|
|
snapshots)
|
|
elif source_cg:
|
|
self._create_cg_from_cg(group, source_cg, volumes, source_vols)
|
|
|
|
return_volumes = []
|
|
for volume in volumes:
|
|
return_volume = {'id': volume.id, 'status': 'available'}
|
|
return_volumes.append(return_volume)
|
|
model_update = {'status': 'available'}
|
|
return model_update, return_volumes
|
|
|
|
@pure_driver_debug_trace
|
|
def delete_consistencygroup(self, context, group, volumes):
|
|
"""Deletes a consistency group."""
|
|
|
|
try:
|
|
pgroup_name = self._get_pgroup_name_from_id(group.id)
|
|
current_array = self._get_current_array()
|
|
current_array.destroy_pgroup(pgroup_name)
|
|
if self.configuration.pure_eradicate_on_delete:
|
|
current_array.eradicate_pgroup(pgroup_name)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
(ERR_MSG_PENDING_ERADICATION in err.text or
|
|
ERR_MSG_NOT_EXIST in err.text)):
|
|
# Treat these as a "success" case since we are trying
|
|
# to delete them anyway.
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Unable to delete Protection Group: %s"),
|
|
err.text)
|
|
|
|
volume_updates = []
|
|
for volume in volumes:
|
|
self.delete_volume(volume)
|
|
volume_updates.append({
|
|
'id': volume.id,
|
|
'status': 'deleted'
|
|
})
|
|
|
|
model_update = {'status': group['status']}
|
|
|
|
return model_update, volume_updates
|
|
|
|
@pure_driver_debug_trace
|
|
def update_consistencygroup(self, context, group,
|
|
add_volumes=None, remove_volumes=None):
|
|
|
|
pgroup_name = self._get_pgroup_name_from_id(group.id)
|
|
if add_volumes:
|
|
addvollist = [self._get_vol_name(vol) for vol in add_volumes]
|
|
else:
|
|
addvollist = []
|
|
|
|
if remove_volumes:
|
|
remvollist = [self._get_vol_name(vol) for vol in remove_volumes]
|
|
else:
|
|
remvollist = []
|
|
|
|
current_array = self._get_current_array()
|
|
current_array.set_pgroup(pgroup_name, addvollist=addvollist,
|
|
remvollist=remvollist)
|
|
|
|
return None, None, None
|
|
|
|
@pure_driver_debug_trace
|
|
def create_cgsnapshot(self, context, cgsnapshot, snapshots):
|
|
"""Creates a cgsnapshot."""
|
|
|
|
cg_id = cgsnapshot.consistencygroup_id
|
|
pgroup_name = self._get_pgroup_name_from_id(cg_id)
|
|
pgsnap_suffix = self._get_pgroup_snap_suffix(cgsnapshot)
|
|
current_array = self._get_current_array()
|
|
current_array.create_pgroup_snapshot(pgroup_name, suffix=pgsnap_suffix)
|
|
|
|
snapshot_updates = []
|
|
for snapshot in snapshots:
|
|
snapshot_updates.append({
|
|
'id': snapshot.id,
|
|
'status': 'available'
|
|
})
|
|
|
|
model_update = {'status': 'available'}
|
|
|
|
return model_update, snapshot_updates
|
|
|
|
def _delete_pgsnapshot(self, pgsnap_name):
|
|
current_array = self._get_current_array()
|
|
try:
|
|
# FlashArray.destroy_pgroup is also used for deleting
|
|
# pgroup snapshots. The underlying REST API is identical.
|
|
current_array.destroy_pgroup(pgsnap_name)
|
|
if self.configuration.pure_eradicate_on_delete:
|
|
current_array.eradicate_pgroup(pgsnap_name)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
(ERR_MSG_PENDING_ERADICATION in err.text or
|
|
ERR_MSG_NOT_EXIST in err.text)):
|
|
# Treat these as a "success" case since we are trying
|
|
# to delete them anyway.
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Unable to delete Protection Group "
|
|
"Snapshot: %s"), err.text)
|
|
|
|
@pure_driver_debug_trace
|
|
def delete_cgsnapshot(self, context, cgsnapshot, snapshots):
|
|
"""Deletes a cgsnapshot."""
|
|
|
|
pgsnap_name = self._get_pgroup_snap_name(cgsnapshot)
|
|
self._delete_pgsnapshot(pgsnap_name)
|
|
|
|
snapshot_updates = []
|
|
for snapshot in snapshots:
|
|
snapshot_updates.append({
|
|
'id': snapshot.id,
|
|
'status': 'deleted',
|
|
})
|
|
|
|
model_update = {'status': cgsnapshot.status}
|
|
|
|
return model_update, snapshot_updates
|
|
|
|
def _validate_manage_existing_ref(self, existing_ref, is_snap=False):
|
|
"""Ensure that an existing_ref is valid and return volume info
|
|
|
|
If the ref is not valid throw a ManageExistingInvalidReference
|
|
exception with an appropriate error.
|
|
|
|
Will return volume or snapshot information from the array for
|
|
the object specified by existing_ref.
|
|
"""
|
|
if "name" not in existing_ref or not existing_ref["name"]:
|
|
raise exception.ManageExistingInvalidReference(
|
|
existing_ref=existing_ref,
|
|
reason=_("manage_existing requires a 'name'"
|
|
" key to identify an existing volume."))
|
|
|
|
if is_snap:
|
|
# Purity snapshot names are prefixed with the source volume name.
|
|
ref_vol_name, ref_snap_suffix = existing_ref['name'].split('.')
|
|
else:
|
|
ref_vol_name = existing_ref['name']
|
|
|
|
current_array = self._get_current_array()
|
|
try:
|
|
volume_info = current_array.get_volume(ref_vol_name, snap=is_snap)
|
|
if volume_info:
|
|
if is_snap:
|
|
for snap in volume_info:
|
|
if snap['name'] == existing_ref['name']:
|
|
return snap
|
|
else:
|
|
return volume_info
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
ERR_MSG_NOT_EXIST in err.text):
|
|
ctxt.reraise = False
|
|
|
|
# If volume information was unable to be retrieved we need
|
|
# to throw a Invalid Reference exception.
|
|
raise exception.ManageExistingInvalidReference(
|
|
existing_ref=existing_ref,
|
|
reason=_("Unable to find Purity ref with name=%s") % ref_vol_name)
|
|
|
|
@pure_driver_debug_trace
|
|
def manage_existing(self, volume, existing_ref):
|
|
"""Brings an existing backend storage object under Cinder management.
|
|
|
|
We expect a volume name in the existing_ref that matches one in Purity.
|
|
"""
|
|
|
|
self._validate_manage_existing_ref(existing_ref)
|
|
|
|
ref_vol_name = existing_ref['name']
|
|
current_array = self._get_current_array()
|
|
connected_hosts = \
|
|
current_array.list_volume_private_connections(ref_vol_name)
|
|
if len(connected_hosts) > 0:
|
|
raise exception.ManageExistingInvalidReference(
|
|
existing_ref=existing_ref,
|
|
reason=_("%(driver)s manage_existing cannot manage a volume "
|
|
"connected to hosts. Please disconnect this volume "
|
|
"from existing hosts before importing"
|
|
) % {'driver': self.__class__.__name__})
|
|
new_vol_name = self._get_vol_name(volume)
|
|
LOG.info(_LI("Renaming existing volume %(ref_name)s to %(new_name)s"),
|
|
{"ref_name": ref_vol_name, "new_name": new_vol_name})
|
|
self._rename_volume_object(ref_vol_name,
|
|
new_vol_name,
|
|
raise_not_exist=True)
|
|
return None
|
|
|
|
@pure_driver_debug_trace
|
|
def manage_existing_get_size(self, volume, existing_ref):
|
|
"""Return size of volume to be managed by manage_existing.
|
|
|
|
We expect a volume name in the existing_ref that matches one in Purity.
|
|
"""
|
|
|
|
volume_info = self._validate_manage_existing_ref(existing_ref)
|
|
size = int(math.ceil(float(volume_info["size"]) / units.Gi))
|
|
|
|
return size
|
|
|
|
def _rename_volume_object(self, old_name, new_name, raise_not_exist=False):
|
|
"""Rename a volume object (could be snapshot) in Purity.
|
|
|
|
This will not raise an exception if the object does not exist
|
|
"""
|
|
current_array = self._get_current_array()
|
|
try:
|
|
current_array.rename_volume(old_name, new_name)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
ERR_MSG_NOT_EXIST in err.text):
|
|
ctxt.reraise = raise_not_exist
|
|
LOG.warning(_LW("Unable to rename %(old_name)s, error "
|
|
"message: %(error)s"),
|
|
{"old_name": old_name, "error": err.text})
|
|
return new_name
|
|
|
|
@pure_driver_debug_trace
|
|
def unmanage(self, volume):
|
|
"""Removes the specified volume from Cinder management.
|
|
|
|
Does not delete the underlying backend storage object.
|
|
|
|
The volume will be renamed with "-unmanaged" as a suffix
|
|
"""
|
|
|
|
vol_name = self._get_vol_name(volume)
|
|
unmanaged_vol_name = vol_name + UNMANAGED_SUFFIX
|
|
LOG.info(_LI("Renaming existing volume %(ref_name)s to %(new_name)s"),
|
|
{"ref_name": vol_name, "new_name": unmanaged_vol_name})
|
|
self._rename_volume_object(vol_name, unmanaged_vol_name)
|
|
|
|
def _verify_manage_snap_api_requirements(self):
|
|
current_array = self._get_current_array()
|
|
api_version = current_array.get_rest_version()
|
|
if api_version not in MANAGE_SNAP_REQUIRED_API_VERSIONS:
|
|
msg = _('Unable to do manage snapshot operations with Purity REST '
|
|
'API version %(api_version)s, requires '
|
|
'%(required_versions)s.') % {
|
|
'api_version': api_version,
|
|
'required_versions': MANAGE_SNAP_REQUIRED_API_VERSIONS
|
|
}
|
|
raise exception.PureDriverException(reason=msg)
|
|
|
|
def manage_existing_snapshot(self, snapshot, existing_ref):
|
|
"""Brings an existing backend storage object under Cinder management.
|
|
|
|
We expect a snapshot name in the existing_ref that matches one in
|
|
Purity.
|
|
"""
|
|
self._verify_manage_snap_api_requirements()
|
|
self._validate_manage_existing_ref(existing_ref, is_snap=True)
|
|
ref_snap_name = existing_ref['name']
|
|
new_snap_name = self._get_snap_name(snapshot)
|
|
LOG.info(_LI("Renaming existing snapshot %(ref_name)s to "
|
|
"%(new_name)s"), {"ref_name": ref_snap_name,
|
|
"new_name": new_snap_name})
|
|
self._rename_volume_object(ref_snap_name,
|
|
new_snap_name,
|
|
raise_not_exist=True)
|
|
return None
|
|
|
|
def manage_existing_snapshot_get_size(self, snapshot, existing_ref):
|
|
"""Return size of snapshot to be managed by manage_existing.
|
|
|
|
We expect a snapshot name in the existing_ref that matches one in
|
|
Purity.
|
|
"""
|
|
self._verify_manage_snap_api_requirements()
|
|
snap_info = self._validate_manage_existing_ref(existing_ref,
|
|
is_snap=True)
|
|
size = int(math.ceil(float(snap_info["size"]) / units.Gi))
|
|
return size
|
|
|
|
def unmanage_snapshot(self, snapshot):
|
|
"""Removes the specified snapshot from Cinder management.
|
|
|
|
Does not delete the underlying backend storage object.
|
|
|
|
We expect a snapshot name in the existing_ref that matches one in
|
|
Purity.
|
|
"""
|
|
self._verify_manage_snap_api_requirements()
|
|
snap_name = self._get_snap_name(snapshot)
|
|
unmanaged_snap_name = snap_name + UNMANAGED_SUFFIX
|
|
LOG.info(_LI("Renaming existing snapshot %(ref_name)s to "
|
|
"%(new_name)s"), {"ref_name": snap_name,
|
|
"new_name": unmanaged_snap_name})
|
|
self._rename_volume_object(snap_name, unmanaged_snap_name)
|
|
|
|
def _get_flasharray(self, san_ip, api_token, rest_version=None,
|
|
verify_https=None, ssl_cert_path=None):
|
|
# Older versions of the module (1.4.0) do not support setting ssl certs
|
|
# TODO(patrickeast): In future releases drop support for 1.4.0
|
|
if self._client_version_greater_than([1, 4, 0]):
|
|
array = purestorage.FlashArray(san_ip,
|
|
api_token=api_token,
|
|
rest_version=rest_version,
|
|
verify_https=verify_https,
|
|
ssl_cert=ssl_cert_path)
|
|
else:
|
|
if verify_https or ssl_cert_path is not None:
|
|
msg = _('HTTPS certificate verification was requested '
|
|
'but cannot be enabled with purestorage '
|
|
'module version %(version)s. Upgrade to a '
|
|
'newer version to enable this feature.') % {
|
|
'version': purestorage.VERSION
|
|
}
|
|
raise exception.PureDriverException(reason=msg)
|
|
array = purestorage.FlashArray(san_ip,
|
|
api_token=api_token,
|
|
rest_version=rest_version)
|
|
array_info = array.get()
|
|
array.array_name = array_info["array_name"]
|
|
array.array_id = array_info["id"]
|
|
LOG.debug("connected to %(array_name)s with REST API %(api_version)s",
|
|
{"array_name": array.array_name,
|
|
"api_version": array._rest_version})
|
|
return array
|
|
|
|
@staticmethod
|
|
def _client_version_greater_than(version):
|
|
module_version = [int(v) for v in purestorage.VERSION.split('.')]
|
|
for limit_version, actual_version in zip(version, module_version):
|
|
if actual_version > limit_version:
|
|
return True
|
|
return False
|
|
|
|
@staticmethod
|
|
def _get_vol_name(volume):
|
|
"""Return the name of the volume Purity will use."""
|
|
return volume["name"] + "-cinder"
|
|
|
|
@staticmethod
|
|
def _get_snap_name(snapshot):
|
|
"""Return the name of the snapshot that Purity will use."""
|
|
return "%s-cinder.%s" % (snapshot["volume_name"], snapshot["name"])
|
|
|
|
@staticmethod
|
|
def _get_pgroup_name_from_id(id):
|
|
return "consisgroup-%s-cinder" % id
|
|
|
|
@staticmethod
|
|
def _get_pgroup_snap_suffix(cgsnapshot):
|
|
return "cgsnapshot-%s-cinder" % cgsnapshot.id
|
|
|
|
@classmethod
|
|
def _get_pgroup_snap_name(cls, cgsnapshot):
|
|
"""Return the name of the pgroup snapshot that Purity will use"""
|
|
cg_id = cgsnapshot.consistencygroup_id
|
|
return "%s.%s" % (cls._get_pgroup_name_from_id(cg_id),
|
|
cls._get_pgroup_snap_suffix(cgsnapshot))
|
|
|
|
@staticmethod
|
|
def _get_pgroup_vol_snap_name(pg_name, pgsnap_suffix, volume_name):
|
|
return "%(pgroup_name)s.%(pgsnap_suffix)s.%(volume_name)s" % {
|
|
'pgroup_name': pg_name,
|
|
'pgsnap_suffix': pgsnap_suffix,
|
|
'volume_name': volume_name,
|
|
}
|
|
|
|
def _get_pgroup_snap_name_from_snapshot(self, snapshot):
|
|
"""Return the name of the snapshot that Purity will use."""
|
|
|
|
# TODO(patrickeast): Remove DB calls once the cgsnapshot objects are
|
|
# available to use and can be associated with the snapshot objects.
|
|
ctxt = context.get_admin_context()
|
|
cgsnapshot = self.db.cgsnapshot_get(ctxt, snapshot.cgsnapshot_id)
|
|
|
|
pg_vol_snap_name = "%(group_snap)s.%(volume_name)s-cinder" % {
|
|
'group_snap': self._get_pgroup_snap_name(cgsnapshot),
|
|
'volume_name': snapshot.volume_name
|
|
}
|
|
return pg_vol_snap_name
|
|
|
|
@staticmethod
|
|
def _generate_purity_host_name(name):
|
|
"""Return a valid Purity host name based on the name passed in."""
|
|
if len(name) > 23:
|
|
name = name[0:23]
|
|
name = INVALID_CHARACTERS.sub("-", name)
|
|
name = name.lstrip("-")
|
|
return "{name}-{uuid}-cinder".format(name=name, uuid=uuid.uuid4().hex)
|
|
|
|
@staticmethod
|
|
def _connect_host_to_vol(array, host_name, vol_name):
|
|
connection = None
|
|
try:
|
|
connection = array.connect_host(host_name, vol_name)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
ERR_MSG_ALREADY_EXISTS in err.text):
|
|
# Happens if the volume is already connected to the host.
|
|
# Treat this as a success.
|
|
ctxt.reraise = False
|
|
LOG.debug("Volume connection already exists for Purity "
|
|
"host with message: %s", err.text)
|
|
|
|
# Get the info for the existing connection.
|
|
connected_hosts = (
|
|
array.list_volume_private_connections(vol_name))
|
|
for host_info in connected_hosts:
|
|
if host_info["host"] == host_name:
|
|
connection = host_info
|
|
break
|
|
if not connection:
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to connect or find connection to host"))
|
|
|
|
return connection
|
|
|
|
def retype(self, context, volume, new_type, diff, host):
|
|
"""Retype from one volume type to another on the same backend.
|
|
|
|
For a Pure Array there is currently no differentiation between types
|
|
of volumes other than some being part of a protection group to be
|
|
replicated.
|
|
"""
|
|
previous_vol_replicated = self._is_volume_replicated_type(volume)
|
|
|
|
new_vol_replicated = False
|
|
if new_type:
|
|
specs = new_type.get("extra_specs")
|
|
if specs and EXTRA_SPECS_REPL_ENABLED in specs:
|
|
replication_capability = specs[EXTRA_SPECS_REPL_ENABLED]
|
|
# Do not validate settings, ignore invalid.
|
|
new_vol_replicated = (replication_capability == "<is> True")
|
|
|
|
if previous_vol_replicated and not new_vol_replicated:
|
|
# Remove from protection group.
|
|
self._disable_replication(volume)
|
|
elif not previous_vol_replicated and new_vol_replicated:
|
|
# Add to protection group.
|
|
self._enable_replication(volume)
|
|
|
|
return True, None
|
|
|
|
@pure_driver_debug_trace
|
|
def _disable_replication(self, volume):
|
|
"""Disable replication on the given volume."""
|
|
|
|
current_array = self._get_current_array()
|
|
LOG.debug("Disabling replication for volume %(id)s residing on "
|
|
"array %(backend_id)s." %
|
|
{"id": volume["id"],
|
|
"backend_id": current_array._backend_id})
|
|
try:
|
|
current_array.set_pgroup(self._replication_pg_name,
|
|
remvollist=([self._get_vol_name(volume)]))
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
ERR_MSG_COULD_NOT_BE_FOUND in err.text):
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Disable replication on volume failed: "
|
|
"already disabled: %s"), err.text)
|
|
else:
|
|
LOG.error(_LE("Disable replication on volume failed with "
|
|
"message: %s"), err.text)
|
|
|
|
@pure_driver_debug_trace
|
|
def failover_host(self, context, volumes, secondary_id=None):
|
|
"""Failover backend to a secondary array
|
|
|
|
This action will not affect the original volumes in any
|
|
way and it will stay as is. If a subsequent failover is performed we
|
|
will simply overwrite the original (now unmanaged) volumes.
|
|
"""
|
|
|
|
if secondary_id == 'default':
|
|
# We are going back to the 'original' driver config, just put
|
|
# our current array back to the primary.
|
|
if self._failed_over_primary_array:
|
|
self._set_current_array(self._failed_over_primary_array)
|
|
return secondary_id, []
|
|
else:
|
|
msg = _('Unable to failback to "default", this can only be '
|
|
'done after a failover has completed.')
|
|
raise exception.InvalidReplicationTarget(message=msg)
|
|
|
|
current_array = self._get_current_array()
|
|
LOG.debug("Failover replication for array %(primary)s to "
|
|
"%(secondary)s." % {
|
|
"primary": current_array._backend_id,
|
|
"secondary": secondary_id
|
|
})
|
|
|
|
if secondary_id == current_array._backend_id:
|
|
raise exception.InvalidReplicationTarget(
|
|
reason=_("Secondary id can not be the same as primary array, "
|
|
"backend_id = %(secondary)s.") %
|
|
{"secondary": secondary_id}
|
|
)
|
|
|
|
secondary_array, pg_snap = self._find_failover_target(secondary_id)
|
|
LOG.debug("Starting failover from %(primary)s to %(secondary)s",
|
|
{"primary": current_array.array_name,
|
|
"secondary": secondary_array.array_name})
|
|
|
|
# NOTE(patrickeast): This currently requires a call with REST API 1.3.
|
|
# If we need to, create a temporary FlashArray for this operation.
|
|
api_version = secondary_array.get_rest_version()
|
|
LOG.debug("Current REST API for array id %(id)s is %(api_version)s",
|
|
{"id": secondary_array.array_id, "api_version": api_version})
|
|
if api_version != '1.3':
|
|
target_array = self._get_flasharray(
|
|
secondary_array._target,
|
|
api_token=secondary_array._api_token,
|
|
rest_version='1.3',
|
|
verify_https=secondary_array._verify_https,
|
|
ssl_cert_path=secondary_array._ssl_cert
|
|
)
|
|
else:
|
|
target_array = secondary_array
|
|
|
|
volume_snaps = target_array.get_volume(pg_snap['name'],
|
|
snap=True,
|
|
pgroup=True)
|
|
|
|
# We only care about volumes that are in the list we are given.
|
|
vol_names = set()
|
|
for vol in volumes:
|
|
vol_names.add(self._get_vol_name(vol))
|
|
|
|
for snap in volume_snaps:
|
|
vol_name = snap['name'].split('.')[-1]
|
|
if vol_name in vol_names:
|
|
vol_names.remove(vol_name)
|
|
LOG.debug('Creating volume %(vol)s from replicated snapshot '
|
|
'%(snap)s', {'vol': vol_name, 'snap': snap['name']})
|
|
secondary_array.copy_volume(snap['name'],
|
|
vol_name,
|
|
overwrite=True)
|
|
else:
|
|
LOG.debug('Ignoring unmanaged volume %(vol)s from replicated '
|
|
'snapshot %(snap)s.', {'vol': vol_name,
|
|
'snap': snap['name']})
|
|
# The only volumes remaining in the vol_names set have been left behind
|
|
# on the array and should be considered as being in an error state.
|
|
model_updates = []
|
|
for vol in volumes:
|
|
if self._get_vol_name(vol) in vol_names:
|
|
model_updates.append({
|
|
'volume_id': vol['id'],
|
|
'updates': {
|
|
'status': 'error',
|
|
}
|
|
})
|
|
|
|
# After failover we want our current array to be swapped for the
|
|
# secondary array we just failed over to.
|
|
self._failed_over_primary_array = self._get_current_array()
|
|
self._set_current_array(secondary_array)
|
|
return secondary_array._backend_id, model_updates
|
|
|
|
def _does_pgroup_exist(self, array, pgroup_name):
|
|
"""Return True/False"""
|
|
try:
|
|
array.get_pgroup(pgroup_name)
|
|
return True
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if err.code == 400 and ERR_MSG_NOT_EXIST in err.text:
|
|
ctxt.reraise = False
|
|
return False
|
|
# Any unexpected exception to be handled by caller.
|
|
|
|
@pure_driver_debug_trace
|
|
@utils.retry(exception.PureDriverException,
|
|
REPL_SETTINGS_PROPAGATE_RETRY_INTERVAL,
|
|
REPL_SETTINGS_PROPAGATE_MAX_RETRIES)
|
|
def _wait_until_target_group_setting_propagates(
|
|
self, target_array, pgroup_name_on_target):
|
|
# Wait for pgroup to show up on target array.
|
|
if self._does_pgroup_exist(target_array, pgroup_name_on_target):
|
|
return
|
|
else:
|
|
raise exception.PureDriverException(message=
|
|
_('Protection Group not '
|
|
'ready.'))
|
|
|
|
@pure_driver_debug_trace
|
|
@utils.retry(exception.PureDriverException,
|
|
REPL_SETTINGS_PROPAGATE_RETRY_INTERVAL,
|
|
REPL_SETTINGS_PROPAGATE_MAX_RETRIES)
|
|
def _wait_until_source_array_allowed(self, source_array, pgroup_name):
|
|
result = source_array.get_pgroup(pgroup_name)
|
|
if result["targets"][0]["allowed"]:
|
|
return
|
|
else:
|
|
raise exception.PureDriverException(message=_('Replication not '
|
|
'allowed yet.'))
|
|
|
|
def _get_pgroup_name_on_target(self, source_array_name, pgroup_name):
|
|
return "%s:%s" % (source_array_name, pgroup_name)
|
|
|
|
@pure_driver_debug_trace
|
|
def _setup_replicated_pgroups(self, primary, secondaries, pg_name,
|
|
replication_interval, retention_policy):
|
|
self._create_protection_group_if_not_exist(
|
|
primary, pg_name)
|
|
|
|
# Apply retention policies to a protection group.
|
|
# These retention policies will be applied on the replicated
|
|
# snapshots on the target array.
|
|
primary.set_pgroup(pg_name, **retention_policy)
|
|
|
|
# Configure replication propagation frequency on a
|
|
# protection group.
|
|
primary.set_pgroup(pg_name,
|
|
replicate_frequency=replication_interval)
|
|
for target_array in secondaries:
|
|
try:
|
|
# Configure PG to replicate to target_array.
|
|
primary.set_pgroup(pg_name,
|
|
addtargetlist=[target_array.array_name])
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if err.code == 400 and (
|
|
ERR_MSG_ALREADY_INCLUDES
|
|
in err.text):
|
|
ctxt.reraise = False
|
|
LOG.info(_LI("Skipping add target %(target_array)s"
|
|
" to protection group %(pgname)s"
|
|
" since it's already added."),
|
|
{"target_array": target_array.array_name,
|
|
"pgname": pg_name})
|
|
|
|
# Wait until "Target Group" setting propagates to target_array.
|
|
pgroup_name_on_target = self._get_pgroup_name_on_target(
|
|
primary.array_name, pg_name)
|
|
|
|
for target_array in secondaries:
|
|
self._wait_until_target_group_setting_propagates(
|
|
target_array,
|
|
pgroup_name_on_target)
|
|
try:
|
|
# Configure the target_array to allow replication from the
|
|
# PG on source_array.
|
|
target_array.set_pgroup(pgroup_name_on_target,
|
|
allowed=True)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if (err.code == 400 and
|
|
ERR_MSG_ALREADY_ALLOWED in err.text):
|
|
ctxt.reraise = False
|
|
LOG.info(_LI("Skipping allow pgroup %(pgname)s on "
|
|
"target array %(target_array)s since "
|
|
"it is already allowed."),
|
|
{"pgname": pg_name,
|
|
"target_array": target_array.array_name})
|
|
|
|
# Wait until source array acknowledges previous operation.
|
|
self._wait_until_source_array_allowed(primary, pg_name)
|
|
# Start replication on the PG.
|
|
primary.set_pgroup(pg_name, replicate_enabled=True)
|
|
|
|
@pure_driver_debug_trace
|
|
def _generate_replication_retention(self):
|
|
"""Generates replication retention settings in Purity compatible format
|
|
|
|
An example of the settings:
|
|
target_all_for = 14400 (i.e. 4 hours)
|
|
target_per_day = 6
|
|
target_days = 4
|
|
The settings above configure the target array to retain 4 hours of
|
|
the most recent snapshots.
|
|
After the most recent 4 hours, the target will choose 4 snapshots
|
|
per day from the previous 6 days for retention
|
|
|
|
:return: a dictionary representing replication retention settings
|
|
"""
|
|
replication_retention = dict(
|
|
target_all_for=self._replication_retention_short_term,
|
|
target_per_day=self._replication_retention_long_term_per_day,
|
|
target_days=self._replication_retention_long_term
|
|
)
|
|
return replication_retention
|
|
|
|
@pure_driver_debug_trace
|
|
def _get_latest_replicated_pg_snap(self,
|
|
target_array,
|
|
source_array_name,
|
|
pgroup_name):
|
|
# Get all protection group snapshots.
|
|
snap_name = "%s:%s" % (source_array_name, pgroup_name)
|
|
LOG.debug("Looking for snap %(snap)s on array id %(array_id)s",
|
|
{"snap": snap_name, "array_id": target_array.array_id})
|
|
pg_snaps = target_array.get_pgroup(snap_name, snap=True, transfer=True)
|
|
LOG.debug("Retrieved snapshots on target %(pg_snaps)s",
|
|
{"pg_snaps": pg_snaps})
|
|
|
|
# Only use snapshots that are replicated completely.
|
|
pg_snaps_filtered = [s for s in pg_snaps if s["progress"] == 1]
|
|
LOG.debug("Filtered list of snapshots %(pg_snaps_filtered)s",
|
|
{"pg_snaps_filtered": pg_snaps_filtered})
|
|
|
|
# Go through the protection group snapshots, latest first ....
|
|
# stop when we find required volume snapshot.
|
|
pg_snaps_filtered.sort(key=lambda x: x["created"], reverse=True)
|
|
LOG.debug("Sorted list of snapshots %(pg_snaps_filtered)s",
|
|
{"pg_snaps_filtered": pg_snaps_filtered})
|
|
|
|
pg_snap = pg_snaps_filtered[0] if pg_snaps_filtered else None
|
|
LOG.debug("Selecting snapshot %(pg_snap)s for failover.",
|
|
{"pg_snap": pg_snap})
|
|
|
|
return pg_snap
|
|
|
|
@pure_driver_debug_trace
|
|
def _create_protection_group_if_not_exist(self, source_array, pgname):
|
|
try:
|
|
source_array.create_pgroup(pgname)
|
|
except purestorage.PureHTTPError as err:
|
|
with excutils.save_and_reraise_exception() as ctxt:
|
|
if err.code == 400 and ERR_MSG_ALREADY_EXISTS in err.text:
|
|
# Happens if the PG already exists
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Skipping creation of PG %s since it "
|
|
"already exists."), pgname)
|
|
# We assume PG has already been setup with correct
|
|
# replication settings.
|
|
return
|
|
if err.code == 400 and (
|
|
ERR_MSG_PENDING_ERADICATION in err.text):
|
|
ctxt.reraise = False
|
|
LOG.warning(_LW("Protection group %s is deleted but not"
|
|
" eradicated - will recreate."), pgname)
|
|
source_array.eradicate_pgroup(pgname)
|
|
source_array.create_pgroup(pgname)
|
|
|
|
def _is_volume_replicated_type(self, volume):
|
|
ctxt = context.get_admin_context()
|
|
volume_type = volume_types.get_volume_type(ctxt,
|
|
volume["volume_type_id"])
|
|
replication_flag = False
|
|
specs = volume_type.get("extra_specs")
|
|
if specs and EXTRA_SPECS_REPL_ENABLED in specs:
|
|
replication_capability = specs[EXTRA_SPECS_REPL_ENABLED]
|
|
# Do not validate settings, ignore invalid.
|
|
replication_flag = (replication_capability == "<is> True")
|
|
return replication_flag
|
|
|
|
def _find_failover_target(self, secondary):
|
|
if not self._replication_target_arrays:
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to find failover target, no "
|
|
"secondary targets configured."))
|
|
secondary_array = None
|
|
pg_snap = None
|
|
if secondary:
|
|
for array in self._replication_target_arrays:
|
|
if array._backend_id == secondary:
|
|
secondary_array = array
|
|
break
|
|
|
|
if not secondary_array:
|
|
raise exception.InvalidReplicationTarget(
|
|
reason=_("Unable to determine secondary_array from"
|
|
" supplied secondary: %(secondary)s.") %
|
|
{"secondary": secondary}
|
|
)
|
|
pg_snap = self._get_latest_replicated_pg_snap(
|
|
secondary_array,
|
|
self._get_current_array().array_name,
|
|
self._replication_pg_name
|
|
)
|
|
else:
|
|
LOG.debug('No secondary array id specified, checking all targets.')
|
|
for array in self._replication_target_arrays:
|
|
try:
|
|
secondary_array = array
|
|
pg_snap = self._get_latest_replicated_pg_snap(
|
|
secondary_array,
|
|
self._get_current_array().array_name,
|
|
self._replication_pg_name
|
|
)
|
|
if pg_snap:
|
|
break
|
|
except Exception:
|
|
LOG.exception(_LE('Error finding replicated pg snapshot '
|
|
'on %(secondary)s.'),
|
|
{'secondary': array._backend_id})
|
|
|
|
if not secondary_array:
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to find viable secondary array from"
|
|
"configured targets: %(targets)s.") %
|
|
{"targets": six.text_type(self._replication_target_arrays)}
|
|
)
|
|
|
|
if not pg_snap:
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to find viable pg snapshot to use for"
|
|
"failover on selected secondary array: %(id)s.") %
|
|
{"id": secondary_array._backend_id}
|
|
)
|
|
|
|
return secondary_array, pg_snap
|
|
|
|
def _get_current_array(self):
|
|
return self._array
|
|
|
|
def _set_current_array(self, array):
|
|
self._array = array
|
|
|
|
|
|
class PureISCSIDriver(PureBaseVolumeDriver, san.SanISCSIDriver):
|
|
|
|
VERSION = "4.0.0"
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
execute = kwargs.pop("execute", utils.execute)
|
|
super(PureISCSIDriver, self).__init__(execute=execute, *args, **kwargs)
|
|
self._storage_protocol = "iSCSI"
|
|
|
|
def _get_host(self, array, connector):
|
|
"""Return dict describing existing Purity host object or None."""
|
|
hosts = array.list_hosts()
|
|
for host in hosts:
|
|
if connector["initiator"] in host["iqn"]:
|
|
return host
|
|
return None
|
|
|
|
@pure_driver_debug_trace
|
|
def initialize_connection(self, volume, connector):
|
|
"""Allow connection to connector and return connection info."""
|
|
connection = self._connect(volume, connector)
|
|
target_ports = self._get_target_iscsi_ports()
|
|
multipath = connector.get("multipath", False)
|
|
|
|
properties = self._build_connection_properties(connection,
|
|
target_ports,
|
|
multipath)
|
|
|
|
if self.configuration.use_chap_auth:
|
|
properties["data"]["auth_method"] = "CHAP"
|
|
properties["data"]["auth_username"] = connection["auth_username"]
|
|
properties["data"]["auth_password"] = connection["auth_password"]
|
|
|
|
initiator_update = connection.get("initiator_update", False)
|
|
if initiator_update:
|
|
properties["initiator_update"] = initiator_update
|
|
|
|
return properties
|
|
|
|
def _build_connection_properties(self, connection, target_ports,
|
|
multipath):
|
|
props = {
|
|
"driver_volume_type": "iscsi",
|
|
"data": {
|
|
"target_discovered": False,
|
|
"discard": True,
|
|
},
|
|
}
|
|
|
|
port_iter = iter(target_ports)
|
|
|
|
target_luns = []
|
|
target_iqns = []
|
|
target_portals = []
|
|
|
|
for port in port_iter:
|
|
target_luns.append(connection["lun"])
|
|
target_iqns.append(port["iqn"])
|
|
target_portals.append(port["portal"])
|
|
|
|
# If we have multiple ports always report them.
|
|
if target_luns and target_iqns and target_portals:
|
|
props["data"]["target_luns"] = target_luns
|
|
props["data"]["target_iqns"] = target_iqns
|
|
props["data"]["target_portals"] = target_portals
|
|
|
|
return props
|
|
|
|
def _get_target_iscsi_ports(self):
|
|
"""Return list of iSCSI-enabled port descriptions."""
|
|
current_array = self._get_current_array()
|
|
ports = current_array.list_ports()
|
|
iscsi_ports = [port for port in ports if port["iqn"]]
|
|
if not iscsi_ports:
|
|
raise exception.PureDriverException(
|
|
reason=_("No iSCSI-enabled ports on target array."))
|
|
return iscsi_ports
|
|
|
|
@staticmethod
|
|
def _generate_chap_secret():
|
|
return volume_utils.generate_password()
|
|
|
|
def _get_chap_credentials(self, host, initiator):
|
|
data = self.driver_utils.get_driver_initiator_data(initiator)
|
|
initiator_updates = None
|
|
username = host
|
|
password = None
|
|
if data:
|
|
for d in data:
|
|
if d["key"] == CHAP_SECRET_KEY:
|
|
password = d["value"]
|
|
break
|
|
if not password:
|
|
password = self._generate_chap_secret()
|
|
initiator_updates = {
|
|
"set_values": {
|
|
CHAP_SECRET_KEY: password
|
|
}
|
|
}
|
|
if initiator_updates:
|
|
self.driver_utils.save_driver_initiator_data(initiator,
|
|
initiator_updates)
|
|
return username, password
|
|
|
|
@utils.synchronized(CONNECT_LOCK_NAME, external=True)
|
|
def _connect(self, volume, connector):
|
|
"""Connect the host and volume; return dict describing connection."""
|
|
iqn = connector["initiator"]
|
|
|
|
if self.configuration.use_chap_auth:
|
|
(chap_username, chap_password) = \
|
|
self._get_chap_credentials(connector['host'], iqn)
|
|
|
|
current_array = self._get_current_array()
|
|
vol_name = self._get_vol_name(volume)
|
|
host = self._get_host(current_array, connector)
|
|
|
|
if host:
|
|
host_name = host["name"]
|
|
LOG.info(_LI("Re-using existing purity host %(host_name)r"),
|
|
{"host_name": host_name})
|
|
if self.configuration.use_chap_auth:
|
|
if not GENERATED_NAME.match(host_name):
|
|
LOG.error(_LE("Purity host %(host_name)s is not managed "
|
|
"by Cinder and can't have CHAP credentials "
|
|
"modified. Remove IQN %(iqn)s from the host "
|
|
"to resolve this issue."),
|
|
{"host_name": host_name,
|
|
"iqn": connector["initiator"]})
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to re-use a host that is not "
|
|
"managed by Cinder with use_chap_auth=True,"))
|
|
elif chap_username is None or chap_password is None:
|
|
LOG.error(_LE("Purity host %(host_name)s is managed by "
|
|
"Cinder but CHAP credentials could not be "
|
|
"retrieved from the Cinder database."),
|
|
{"host_name": host_name})
|
|
raise exception.PureDriverException(
|
|
reason=_("Unable to re-use host with unknown CHAP "
|
|
"credentials configured."))
|
|
else:
|
|
host_name = self._generate_purity_host_name(connector["host"])
|
|
LOG.info(_LI("Creating host object %(host_name)r with IQN:"
|
|
" %(iqn)s."), {"host_name": host_name, "iqn": iqn})
|
|
current_array.create_host(host_name, iqnlist=[iqn])
|
|
|
|
if self.configuration.use_chap_auth:
|
|
current_array.set_host(host_name,
|
|
host_user=chap_username,
|
|
host_password=chap_password)
|
|
|
|
connection = self._connect_host_to_vol(current_array,
|
|
host_name,
|
|
vol_name)
|
|
|
|
if self.configuration.use_chap_auth:
|
|
connection["auth_username"] = chap_username
|
|
connection["auth_password"] = chap_password
|
|
|
|
return connection
|
|
|
|
|
|
class PureFCDriver(PureBaseVolumeDriver, driver.FibreChannelDriver):
|
|
|
|
VERSION = "2.0.0"
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
execute = kwargs.pop("execute", utils.execute)
|
|
super(PureFCDriver, self).__init__(execute=execute, *args, **kwargs)
|
|
self._storage_protocol = "FC"
|
|
self._lookup_service = fczm_utils.create_lookup_service()
|
|
|
|
def _get_host(self, array, connector):
|
|
"""Return dict describing existing Purity host object or None."""
|
|
hosts = array.list_hosts()
|
|
for host in hosts:
|
|
for wwn in connector["wwpns"]:
|
|
if wwn in str(host["wwn"]).lower():
|
|
return host
|
|
|
|
@staticmethod
|
|
def _get_array_wwns(array):
|
|
"""Return list of wwns from the array"""
|
|
ports = array.list_ports()
|
|
return [port["wwn"] for port in ports if port["wwn"]]
|
|
|
|
@fczm_utils.AddFCZone
|
|
@pure_driver_debug_trace
|
|
def initialize_connection(self, volume, connector):
|
|
"""Allow connection to connector and return connection info."""
|
|
current_array = self._get_current_array()
|
|
connection = self._connect(volume, connector)
|
|
target_wwns = self._get_array_wwns(current_array)
|
|
init_targ_map = self._build_initiator_target_map(target_wwns,
|
|
connector)
|
|
properties = {
|
|
"driver_volume_type": "fibre_channel",
|
|
"data": {
|
|
'target_discovered': True,
|
|
"target_lun": connection["lun"],
|
|
"target_wwn": target_wwns,
|
|
'initiator_target_map': init_targ_map,
|
|
"discard": True,
|
|
}
|
|
}
|
|
|
|
return properties
|
|
|
|
@utils.synchronized(CONNECT_LOCK_NAME, external=True)
|
|
def _connect(self, volume, connector):
|
|
"""Connect the host and volume; return dict describing connection."""
|
|
wwns = connector["wwpns"]
|
|
|
|
current_array = self._get_current_array()
|
|
vol_name = self._get_vol_name(volume)
|
|
host = self._get_host(current_array, connector)
|
|
|
|
if host:
|
|
host_name = host["name"]
|
|
LOG.info(_LI("Re-using existing purity host %(host_name)r"),
|
|
{"host_name": host_name})
|
|
else:
|
|
host_name = self._generate_purity_host_name(connector["host"])
|
|
LOG.info(_LI("Creating host object %(host_name)r with WWN:"
|
|
" %(wwn)s."), {"host_name": host_name, "wwn": wwns})
|
|
current_array.create_host(host_name, wwnlist=wwns)
|
|
|
|
return self._connect_host_to_vol(current_array, host_name, vol_name)
|
|
|
|
def _build_initiator_target_map(self, target_wwns, connector):
|
|
"""Build the target_wwns and the initiator target map."""
|
|
init_targ_map = {}
|
|
|
|
if self._lookup_service:
|
|
# use FC san lookup to determine which NSPs to use
|
|
# for the new VLUN.
|
|
dev_map = self._lookup_service.get_device_mapping_from_network(
|
|
connector['wwpns'],
|
|
target_wwns)
|
|
|
|
for fabric_name in dev_map:
|
|
fabric = dev_map[fabric_name]
|
|
for initiator in fabric['initiator_port_wwn_list']:
|
|
if initiator not in init_targ_map:
|
|
init_targ_map[initiator] = []
|
|
init_targ_map[initiator] += fabric['target_port_wwn_list']
|
|
init_targ_map[initiator] = list(set(
|
|
init_targ_map[initiator]))
|
|
else:
|
|
init_targ_map = dict.fromkeys(connector["wwpns"], target_wwns)
|
|
|
|
return init_targ_map
|
|
|
|
@fczm_utils.RemoveFCZone
|
|
@pure_driver_debug_trace
|
|
def terminate_connection(self, volume, connector, **kwargs):
|
|
"""Terminate connection."""
|
|
current_array = self._get_current_array()
|
|
|
|
no_more_connections = self._disconnect(current_array, volume,
|
|
connector, **kwargs)
|
|
|
|
properties = {"driver_volume_type": "fibre_channel", "data": {}}
|
|
|
|
if no_more_connections:
|
|
target_wwns = self._get_array_wwns(current_array)
|
|
init_targ_map = self._build_initiator_target_map(target_wwns,
|
|
connector)
|
|
properties["data"] = {"target_wwn": target_wwns,
|
|
"initiator_target_map": init_targ_map}
|
|
|
|
return properties
|