privsep: Convert 'os_brick.caches.opencas'
Change-Id: I4fec9d99911e47d9c3f225d188407af961acc7d3 Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
This commit is contained in:
Stephen Finucane
Stephen Finucane
parent
3369d168f4
commit
ab02fe2dfc
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@ -23,6 +23,7 @@ os_brick/local_dev/lvm.py
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os_brick/privileged/cryptsetup.py
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os_brick/privileged/luks.py
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os_brick/privileged/nvmeof.py
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os_brick/privileged/opencas.py
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os_brick/privileged/rbd.py
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os_brick/remotefs/remotefs.py
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os_brick/utils.py
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@ -12,24 +12,23 @@
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import abc
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import debtcollector
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from oslo_log import log as logging
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from oslo_utils import importutils
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from os_brick import exception
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from os_brick.i18n import _
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LOG = logging.getLogger(__name__)
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CACHE_ENGINE_TO_CACHE_CLASS_MAP = {
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"opencas": 'os_brick.caches.opencas.OpenCASEngine',
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}
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_NO_ARG_SENTINEL = object()
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class CacheEngineBase(object, metaclass=abc.ABCMeta):
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def __init__(self, **kwargs):
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self._root_helper = kwargs.get('root_helper')
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class CacheEngineBase(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def is_engine_ready(self, **kwargs):
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return
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@ -43,20 +42,36 @@ class CacheEngineBase(object, metaclass=abc.ABCMeta):
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return
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class CacheManager():
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class CacheManager:
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"""Cache manager for volumes.
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This CacheManager uses cache engines to do volume cache.
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"""
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def __init__(self, root_helper, connection_info,
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*args, **kwargs):
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def __init__(
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self,
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root_helper=_NO_ARG_SENTINEL,
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connection_info=_NO_ARG_SENTINEL,
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*args,
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**kwargs,
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):
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if root_helper != _NO_ARG_SENTINEL:
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debtcollector.deprecate(
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"The 'root_helper' argument is no longer used and will be "
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"removed in a future release: please drop this argument."
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)
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if connection_info == _NO_ARG_SENTINEL:
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raise TypeError('missing connection_info')
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data = connection_info['data']
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if not data.get('device_path'):
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volume_id = data.get('volume_id') or connection_info.get('serial')
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raise exception.VolumeLocalCacheNotSupported(
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volume_id=volume_id,
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volume_type=connection_info.get('driver_volume_type'))
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volume_type=connection_info.get('driver_volume_type'),
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)
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self.ori_device_path = data.get('device_path')
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if not data.get('cacheable'):
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@ -64,11 +79,9 @@ class CacheManager():
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return
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self.cacheable = True
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self.root_helper = root_helper
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self.engine_name = kwargs.get('cache_name')
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self.args = args
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self.kwargs = kwargs
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self.kwargs["root_helper"] = root_helper
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self.kwargs["dev_path"] = data.get('device_path')
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self.engine = self._get_engine(self.engine_name, **self.kwargs)
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@ -9,54 +9,35 @@
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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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import os
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from oslo_concurrency import processutils as putils
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import debtcollector
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from oslo_log import log as logging
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from os_brick import caches
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from os_brick import exception
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from os_brick import executor
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import os_brick.privileged.opencas
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LOG = logging.getLogger(__name__)
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class OpenCASEngine(executor.Executor, caches.CacheEngineBase):
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class OpenCASEngine(caches.CacheEngineBase):
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def __init__(self, **kwargs):
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super(OpenCASEngine, self).__init__(**kwargs)
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if 'root_helper' in kwargs:
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debtcollector.deprecate(
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"The 'root_helper' argument is no longer used and will be "
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"removed in a future release: please drop this argument."
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)
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kwargs.pop('root_helper')
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self.cache_id = kwargs.get('opencas_cache_id')
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def os_execute(self, *cmd, **kwargs):
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LOG.debug('os_execute: cmd: %s, args: %s', cmd, kwargs)
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try:
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out, err = self._execute(*cmd, **kwargs)
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except putils.ProcessExecutionError as err:
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LOG.exception('os_execute error')
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LOG.error('Cmd :%s', err.cmd)
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LOG.error('StdOut :%s', err.stdout)
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LOG.error('StdErr :%s', err.stderr)
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raise
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return out, err
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def is_engine_ready(self, **kwargs):
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"""'casadm -L' will print like:
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return os_brick.privileged.opencas.is_engine_ready(self.cache_id)
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type id disk status write policy device
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cache 1 /dev/nvme0n1 Running wt -
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"""
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cmd = ['casadm', '-L']
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kwargs = dict(run_as_root=True,
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root_helper=self._root_helper)
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out, err = self.os_execute(*cmd, **kwargs)
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for line in out.splitlines():
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fields = line.split()
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if str(self.cache_id) == fields[1] and 'Running' == fields[3]:
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return True
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return False
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def _map_casdisk(self, core_id):
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return os_brick.privileged.opencas.map_device(self.cache_id, core_id)
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def attach_volume(self, **kwargs):
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core = kwargs.get('dev_path')
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@ -66,54 +47,16 @@ class OpenCASEngine(executor.Executor, caches.CacheEngineBase):
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core = os.path.realpath(core)
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return self._map_casdisk(core)
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def _unmap_casdisk(self, core_id):
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return os_brick.privileged.opencas.unmap_device(self.cache_id, core_id)
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def detach_volume(self, **kwargs):
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casdev = kwargs.get('dev_path')
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if casdev is None:
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dev_path = kwargs.get('dev_path')
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if dev_path is None:
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LOG.error('dev_path is not specified')
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raise exception.VolumePathsNotFound()
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coreid, coredev = self._get_mapped_coredev(casdev)
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coreid, coredev = os_brick.privileged.opencas.get_mapping(dev_path)
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LOG.info("opencas: coreid=%s,coredev=%s", coreid, coredev)
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self._unmap_casdisk(coreid)
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return coredev
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def _get_mapped_casdev(self, core):
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cmd = ['casadm', '-L']
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kwargs = dict(run_as_root=True,
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root_helper=self._root_helper)
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out, err = self.os_execute(*cmd, **kwargs)
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for line in out.splitlines():
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if line.find(core) < 0:
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continue
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fields = line.split()
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return fields[5]
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raise exception.BrickException('Cannot find emulated device.')
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def _get_mapped_coredev(self, casdev):
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cmd = ['casadm', '-L']
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kwargs = dict(run_as_root=True,
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root_helper=self._root_helper)
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out, err = self.os_execute(*cmd, **kwargs)
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for line in out.splitlines():
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if line.find(casdev) < 0:
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continue
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fields = line.split()
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return (fields[1], fields[2])
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raise exception.BrickException('Cannot find core device.')
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def _map_casdisk(self, core):
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cmd = ['casadm', '-A', '-i', self.cache_id, '-d', core]
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kwargs = dict(run_as_root=True,
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root_helper=self._root_helper)
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out, err = self.os_execute(*cmd, **kwargs)
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return self._get_mapped_casdev(core)
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def _unmap_casdisk(self, coreid):
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cmd = ['casadm', '-R', '-f', '-i', self.cache_id, '-j', coreid]
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kwargs = dict(run_as_root=True,
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root_helper=self._root_helper)
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out, err = self.os_execute(*cmd, **kwargs)
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@ -0,0 +1,113 @@
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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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import typing as ty
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from oslo_concurrency import processutils
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from oslo_log import log as logging
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from os_brick import exception
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import os_brick.privileged
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LOG = logging.getLogger(__name__)
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# NOTE(stephenfin): This is purposefully not wrapped in an entrypoint since it
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# shouldn't be called directly
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def _list_caches() -> ty.Tuple[str, str]:
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"""Displays each cache instance with relevant details.
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'casadm -L' will print output like::
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type id disk status write policy device
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cache 1 /dev/nvme0n1 Running wt -
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It's the responsibility of the caller to parse this.
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:returns: output from command
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"""
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cmd = ['casadm', '-L']
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return processutils.execute(*cmd)
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@os_brick.privileged.default.entrypoint
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def is_engine_ready(cache_id: int) -> bool:
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"""Determine if the specified cache is active.
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:param cache_id: ID of cache to query status for
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:returns: True if cache is enabled and running, else False
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"""
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out, err = _list_caches()
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for line in out.splitlines():
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fields = line.split()
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if str(cache_id) == fields[1] and 'Running' == fields[3]:
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return True
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return False
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@os_brick.privileged.default.entrypoint
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def get_mapping(dev_path: str) -> ty.Tuple[str, str]:
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"""Get core mapping for the specified device.
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:param dev_path: path to device
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:returns: A tuple of core ID and core device
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:raises: exception.BrickException if no matching device found
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"""
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out, err = _list_caches()
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for line in out.splitlines():
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if line.find(dev_path) < 0:
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continue
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fields = line.split()
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return fields[1], fields[2]
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raise exception.BrickException('Cannot find core device')
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@os_brick.privileged.default.entrypoint
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def map_device(cache_id: int, core_device: str) -> str:
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"""Map a core device to the framework associated with a given cache.
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:param cache_id: Unique identifier for cache in range 1 to 16384
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:param core_device: Location of the HDD storage/core device. This must
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be a complete device path in the /dev directory, for example /dev/sdb
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:returns: The created mapping name
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"""
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cmd = ['casadm', '-A', '-i', cache_id, '-d', core_device]
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processutils.execute(*cmd)
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out, err = _list_caches()
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for line in out.splitlines():
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if line.find(core_device) < 0:
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continue
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fields = line.split()
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return fields[5]
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raise exception.BrickException('Cannot find emulated device')
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@os_brick.privileged.default.entrypoint
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def unmap_device(cache_id: int, core_id: str) -> None:
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"""Unmap a core device from the framework associated with a given cache.
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:param cache_id: Unique identifier for cache in range 1 to 16384
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:param core_device: Location of the HDD storage/core device. This must
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be a complete device path in the /dev directory, for example /dev/sdb
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:returns: None
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"""
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cmd = ['casadm', '-R', '-f', '-i', cache_id, '-j', core_id]
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processutils.execute(*cmd)
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@ -12,9 +12,8 @@
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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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from unittest import mock
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from oslo_concurrency import processutils as putils
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from unittest import mock
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from os_brick.caches import opencas
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from os_brick import exception
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@ -23,7 +22,7 @@ from os_brick.tests import base
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class OpenCASEngineTestCase(base.TestCase):
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def setUp(self):
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super(OpenCASEngineTestCase, self).setUp()
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super().setUp()
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self.connection_info = {
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"data": {
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"device_path": "/dev/disk/by-path/"
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@ -31,133 +30,61 @@ class OpenCASEngineTestCase(base.TestCase):
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":volume-fake_uuid-lun-1",
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},
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}
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self.root_helper = None
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@mock.patch('os_brick.executor.Executor._execute')
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def test_os_execute_exception(self, mock_execute):
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raise_err = [
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putils.ProcessExecutionError(exit_code=1),
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mock.DEFAULT,
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]
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@mock.patch(
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'os_brick.privileged.opencas.is_engine_ready',
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return_value=True,
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)
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def test_is_engine_ready(self, mock_is_engine_ready):
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engine = opencas.OpenCASEngine(opencas_cache_id=42)
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self.assertTrue(engine.is_engine_ready())
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mock_is_engine_ready.assert_called_once_with(42)
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@mock.patch('os_brick.privileged.opencas.map_device')
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def test_map_casdisk(self, mock_unmap_device):
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engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine.os_execute, 'cmd', 'param')
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine.is_engine_ready)
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine._get_mapped_casdev, 'path')
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine._get_mapped_coredev, 'path')
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine._map_casdisk, 'path')
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mock_execute.side_effect = raise_err
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self.assertRaises(putils.ProcessExecutionError,
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engine._unmap_casdisk, 'path')
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@mock.patch('os_brick.executor.Executor._execute')
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def test_is_engine_ready(self, moc_exec):
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out_ready = """type id disk status write policy device
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cache 1 /dev/nvme0n1 Running wt -"""
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out_not_ready = 'type id disk status write policy device'
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err = ''
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engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
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moc_exec.return_value = (out_ready, err)
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ret = engine.is_engine_ready()
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self.assertTrue(ret)
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moc_exec.return_value = (out_not_ready, err)
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ret = engine.is_engine_ready()
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self.assertFalse(ret)
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moc_exec.assert_has_calls([
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mock.call('casadm', '-L', run_as_root=True, root_helper=None)
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])
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@mock.patch('os_brick.executor.Executor._execute')
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def test_get_mapped_casdev(self, moc_exec):
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out_ready = """type id disk status write policy device
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cache 1 /dev/nvme0n1 Running wt -
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└core 1 /dev/sdd Active - /dev/cas1-1"""
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err = ''
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engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
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moc_exec.return_value = (out_ready, err)
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ret1 = engine._get_mapped_casdev('/dev/sdd')
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self.assertEqual('/dev/cas1-1', ret1)
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@mock.patch('os_brick.executor.Executor._execute')
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def test_get_mapped_coredev(self, moc_exec):
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out_ready = """type id disk status write policy device
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cache 1 /dev/nvme0n1 Running wt -
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└core 1 /dev/sdd Active - /dev/cas1-1"""
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err = ''
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engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
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moc_exec.return_value = (out_ready, err)
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ret1, ret2 = engine._get_mapped_coredev('/dev/cas1-1')
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self.assertEqual('1', ret1)
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self.assertEqual('/dev/sdd', ret2)
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@mock.patch('os_brick.executor.Executor._execute')
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@mock.patch('os_brick.caches.opencas.OpenCASEngine._get_mapped_casdev')
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def test_map_casdisk(self, moc_get_mapped_casdev, moc_exec):
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engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
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moc_get_mapped_casdev.return_value = ''
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moc_exec.return_value = ('', '')
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engine._map_casdisk('/dev/sdd')
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moc_exec.assert_has_calls([
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||||
mock.call('casadm', '-A', '-i', 1, '-d', '/dev/sdd',
|
||||
run_as_root=True, root_helper=None)
|
||||
])
|
||||
|
||||
@mock.patch('os_brick.executor.Executor._execute')
|
||||
def test_unmap_casdisk(self, moc_exec):
|
||||
engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
|
||||
|
||||
moc_exec.return_value = ('', '')
|
||||
engine._unmap_casdisk('1')
|
||||
|
||||
moc_exec.assert_has_calls([
|
||||
mock.call('casadm', '-R', '-f', '-i', 1, '-j', '1',
|
||||
run_as_root=True, root_helper=None)
|
||||
])
|
||||
engine._map_casdisk('1')
|
||||
mock_unmap_device.assert_called_once_with(1, '1')
|
||||
|
||||
@mock.patch('os_brick.caches.opencas.OpenCASEngine._map_casdisk')
|
||||
def test_attach_volume(self, moc_map):
|
||||
def test_attach_volume(self, mock_map_casdisk):
|
||||
engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
|
||||
moc_map.return_value = ''
|
||||
|
||||
args = {'no_dev_path': 'path'}
|
||||
self.assertRaises(exception.VolumePathsNotFound,
|
||||
engine.attach_volume, **args)
|
||||
# Exception raised if we don't pass a dev_path or the dev_path is None
|
||||
self.assertRaises(exception.VolumePathsNotFound, engine.attach_volume)
|
||||
self.assertRaises(
|
||||
exception.VolumePathsNotFound,
|
||||
engine.attach_volume,
|
||||
dev_path=None,
|
||||
)
|
||||
|
||||
# No exception if dev_path set correctly
|
||||
args = {'dev_path': 'path'}
|
||||
engine.attach_volume(**args)
|
||||
engine.attach_volume(dev_path='path')
|
||||
mock_map_casdisk.assert_called_once_with(mock.ANY)
|
||||
|
||||
@mock.patch('os_brick.executor.Executor._execute')
|
||||
def test_detach_volume(self, moc_exec):
|
||||
out_ready = """type id disk status write policy device
|
||||
cache 1 /dev/nvme0n1 Running wt -
|
||||
└core 1 /dev/sdd Active - /dev/cas1-1"""
|
||||
err = ''
|
||||
@mock.patch('os_brick.privileged.opencas.unmap_device')
|
||||
def test_unmap_casdisk(self, mock_unmap_device):
|
||||
engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
|
||||
|
||||
moc_exec.return_value = (out_ready, err)
|
||||
engine._unmap_casdisk('1')
|
||||
mock_unmap_device.assert_called_once_with(1, '1')
|
||||
|
||||
args = {'no_dev_path': 'path'}
|
||||
self.assertRaises(exception.VolumePathsNotFound,
|
||||
engine.detach_volume, **args)
|
||||
@mock.patch('os_brick.privileged.opencas.get_mapping')
|
||||
@mock.patch('os_brick.caches.opencas.OpenCASEngine._unmap_casdisk')
|
||||
def test_detach_volume(self, mock_unmap_casdisk, mock_get_mapping):
|
||||
mock_get_mapping.return_value = ('1', '/dev/sdd')
|
||||
|
||||
engine = opencas.OpenCASEngine(root_helper=None, opencas_cache_id=1)
|
||||
|
||||
# Exception raised if we don't pass a dev_path or the dev_path is None
|
||||
self.assertRaises(exception.VolumePathsNotFound, engine.detach_volume)
|
||||
self.assertRaises(
|
||||
exception.VolumePathsNotFound,
|
||||
engine.detach_volume,
|
||||
dev_path=None,
|
||||
)
|
||||
|
||||
# No exception if dev_path set correctly
|
||||
args = {'dev_path': '/dev/cas1-1'}
|
||||
engine.detach_volume(**args)
|
||||
engine.detach_volume(dev_path='/dev/cas1-1')
|
||||
mock_unmap_casdisk.assert_called_once_with('1')
|
||||
|
|
|
|||
|
|
@ -0,0 +1,128 @@
|
|||
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
||||
# not use this file except in compliance with the License. You may obtain
|
||||
# a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
# License for the specific language governing permissions and limitations
|
||||
# under the License.
|
||||
|
||||
import textwrap
|
||||
from unittest import mock
|
||||
|
||||
from os_brick import exception
|
||||
import os_brick.privileged as privsep_brick
|
||||
import os_brick.privileged.opencas
|
||||
from os_brick.tests import base
|
||||
|
||||
FAKE_LIST_CACHES = (
|
||||
textwrap.dedent(
|
||||
"""
|
||||
type id disk status write policy device
|
||||
cache 1 /dev/nvme0n1 Running wt /dev/cas1-1
|
||||
cache 2 /dev/sdc1 Inactive wt /dev/cas1-2
|
||||
""".strip()
|
||||
),
|
||||
None,
|
||||
)
|
||||
|
||||
|
||||
class PrivOpenCASTestCase(base.TestCase):
|
||||
def setUp(self):
|
||||
super().setUp()
|
||||
|
||||
# Disable privsep server/client mode
|
||||
privsep_brick.default.set_client_mode(False)
|
||||
self.addCleanup(privsep_brick.default.set_client_mode, True)
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_is_engine_ready(self, mock_execute):
|
||||
mock_execute.return_value = FAKE_LIST_CACHES
|
||||
|
||||
self.assertTrue(os_brick.privileged.opencas.is_engine_ready(1))
|
||||
self.assertFalse(os_brick.privileged.opencas.is_engine_ready(2))
|
||||
|
||||
# called twice
|
||||
mock_execute.assert_has_calls(
|
||||
[
|
||||
mock.call('casadm', '-L'),
|
||||
mock.call('casadm', '-L'),
|
||||
]
|
||||
)
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_get_mapping(self, mock_execute):
|
||||
mock_execute.return_value = FAKE_LIST_CACHES
|
||||
|
||||
self.assertEqual(
|
||||
('2', '/dev/sdc1'),
|
||||
os_brick.privileged.opencas.get_mapping('/dev/cas1-2'),
|
||||
)
|
||||
|
||||
mock_execute.assert_called_once_with('casadm', '-L')
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_get_mapping__missing(self, mock_execute):
|
||||
mock_execute.return_value = ('', '')
|
||||
|
||||
exc = self.assertRaises(
|
||||
exception.BrickException,
|
||||
os_brick.privileged.opencas.get_mapping,
|
||||
'/dev/cas1-2',
|
||||
)
|
||||
|
||||
self.assertIn('Cannot find core device', str(exc))
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_map_device(self, mock_execute):
|
||||
mock_execute.side_effect = [
|
||||
None,
|
||||
FAKE_LIST_CACHES,
|
||||
]
|
||||
|
||||
self.assertEqual(
|
||||
'/dev/cas1-2',
|
||||
os_brick.privileged.opencas.map_device('2', '/dev/sdc1'),
|
||||
)
|
||||
|
||||
mock_execute.assert_has_calls(
|
||||
[
|
||||
mock.call('casadm', '-A', '-i', '2', '-d', '/dev/sdc1'),
|
||||
mock.call('casadm', '-L'),
|
||||
]
|
||||
)
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_map_device__missing(self, mock_execute):
|
||||
mock_execute.side_effect = [
|
||||
None,
|
||||
('', ''),
|
||||
]
|
||||
|
||||
exc = self.assertRaises(
|
||||
exception.BrickException,
|
||||
os_brick.privileged.opencas.map_device,
|
||||
'2',
|
||||
'/dev/sdc1',
|
||||
)
|
||||
|
||||
self.assertIn('Cannot find emulated device', str(exc))
|
||||
|
||||
@mock.patch('oslo_concurrency.processutils.execute')
|
||||
def test_unmap_device(self, mock_execute):
|
||||
self.assertIsNone(
|
||||
os_brick.privileged.opencas.unmap_device('2', '/dev/sdc1'),
|
||||
)
|
||||
|
||||
mock_execute.assert_called_once_with(
|
||||
'casadm',
|
||||
'-R',
|
||||
'-f',
|
||||
'-i',
|
||||
'2',
|
||||
'-j',
|
||||
'/dev/sdc1',
|
||||
)
|
||||
Loading…
Reference in New Issue