def mds_checkup():
"""
Validates the current MDS setup/configuration and takes actions where required
"""
mds_dict = {}
for vpool in VPoolList.get_vpools():
for mds_service in vpool.mds_services:
storagerouter = mds_service.service.storagerouter
if vpool not in mds_dict:
mds_dict[vpool] = {}
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {'client': SSHClient(storagerouter, username='******'),
'services': []}
mds_dict[vpool][storagerouter]['services'].append(mds_service)
for vpool, storagerouter_info in mds_dict.iteritems():
# 1. First, make sure there's at least one MDS on every StorageRouter that's not overloaded
# If not, create an extra MDS for that StorageRouter
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]['client']
mds_services = mds_dict[vpool][storagerouter]['services']
has_room = False
for mds_service in mds_services[:]:
if mds_service.capacity == 0 and len(mds_service.vdisks_guids) == 0:
client = SSHClient(storagerouter)
MDSServiceController.remove_mds_service(mds_service, client, storagerouter, vpool, reload_config=True)
mds_services.remove(mds_service)
for mds_service in mds_services:
_, load = MDSServiceController.get_mds_load(mds_service)
if load < Configuration.get('ovs.storagedriver.mds.maxload'):
has_room = True
break
if has_room is False:
mds_service = MDSServiceController.prepare_mds_service(client, storagerouter, vpool,
fresh_only=False, reload_config=True)
if mds_service is None:
raise RuntimeError('Could not add MDS node')
mds_services.append(mds_service)
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(vpool)
for storagerouter in mds_dict[vpool]:
client = mds_dict[vpool][storagerouter]['client']
storagedriver_config = StorageDriverConfiguration('storagedriver', vpool.name)
storagedriver_config.load(client)
if storagedriver_config.is_new is False:
storagedriver_config.clean() # Clean out obsolete values
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=mds_config_set[storagerouter.guid]
)
storagedriver_config.save(client)
# 2. Per VPool, execute a safety check, making sure the master/slave configuration is optimal.
for vdisk in vpool.vdisks:
MDSServiceController.ensure_safety(vdisk)
def mds_checkup():
"""
Validates the current MDS setup/configuration and takes actions where required
"""
MDSServiceController._logger.info('MDS checkup - Started')
mds_dict = {}
for vpool in VPoolList.get_vpools():
MDSServiceController._logger.info('MDS checkup - vPool {0}'.format(
vpool.name))
mds_dict[vpool] = {}
for mds_service in vpool.mds_services:
storagerouter = mds_service.service.storagerouter
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {
'client': None,
'services': []
}
try:
mds_dict[vpool][storagerouter]['client'] = SSHClient(
storagerouter, username='******')
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Storage Router {1} - ONLINE'
.format(vpool.name, storagerouter.name))
except UnableToConnectException:
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Storage Router {1} - OFFLINE'
.format(vpool.name, storagerouter.name))
mds_dict[vpool][storagerouter]['services'].append(mds_service)
failures = []
max_load = Configuration.get(
'/ovs/framework/storagedriver|mds_maxload')
for vpool, storagerouter_info in mds_dict.iteritems():
# 1. First, make sure there's at least one MDS on every StorageRouter that's not overloaded
# If not, create an extra MDS for that StorageRouter
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]['client']
mds_services = mds_dict[vpool][storagerouter]['services']
has_room = False
for mds_service in mds_services[:]:
if mds_service.capacity == 0 and len(
mds_service.vdisks_guids) == 0:
MDSServiceController._logger.info(
'MDS checkup - Removing mds_service {0} for vPool {1}'
.format(mds_service.number, vpool.name))
MDSServiceController.remove_mds_service(
mds_service,
vpool,
reconfigure=True,
allow_offline=client is None)
mds_services.remove(mds_service)
for mds_service in mds_services:
_, load = MDSServiceController.get_mds_load(mds_service)
if load < max_load:
has_room = True
break
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Storage Router {1} - Capacity available: {2}'
.format(vpool.name, storagerouter.name, has_room))
if has_room is False and client is not None:
mds_service = MDSServiceController.prepare_mds_service(
storagerouter=storagerouter,
vpool=vpool,
fresh_only=False,
reload_config=True)
if mds_service is None:
raise RuntimeError('Could not add MDS node')
mds_services.append(mds_service)
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(
vpool, True)
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]['client']
if client is None:
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Storage Router {1} - Marked as offline, not setting default MDS configuration'
.format(vpool.name, storagerouter.name))
continue
storagedriver = [
sd for sd in storagerouter.storagedrivers
if sd.vpool_guid == vpool.guid
][0]
storagedriver_config = StorageDriverConfiguration(
'storagedriver', vpool.guid,
storagedriver.storagedriver_id)
storagedriver_config.load()
if storagedriver_config.is_new is False:
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Storage Router {1} - Storing default MDS configuration: {2}'
.format(vpool.name, storagerouter.name,
mds_config_set[storagerouter.guid]))
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=mds_config_set[
storagerouter.guid])
storagedriver_config.save(client)
# 2. Per VPool, execute a safety check, making sure the master/slave configuration is optimal.
MDSServiceController._logger.info(
'MDS checkup - vPool {0} - Ensuring safety for all virtual disks'
.format(vpool.name))
for vdisk in vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk)
except Exception:
message = 'Ensure safety for vDisk {0} with guid {1} failed'.format(
vdisk.name, vdisk.guid)
MDSServiceController._logger.exception(message)
failures.append(message)
if len(failures) > 0:
raise Exception('\n - ' + '\n - '.join(failures))
MDSServiceController._logger.info('MDS checkup - Finished')
def add_vpool(cls, parameters):
"""
Add a vPool to the machine this task is running on
:param parameters: Parameters for vPool creation
:type parameters: dict
:return: None
:rtype: NoneType
"""
# TODO: Add logging
cls._logger.debug('Adding vpool. Parameters: {}'.format(parameters))
# VALIDATIONS
if not isinstance(parameters, dict):
raise ValueError(
'Parameters passed to create a vPool should be of type dict')
# Check StorageRouter existence
storagerouter = StorageRouterList.get_by_ip(
ip=parameters.get('storagerouter_ip'))
if storagerouter is None:
raise RuntimeError('Could not find StorageRouter')
# Validate requested vPool configurations
vp_installer = VPoolInstaller(name=parameters.get('vpool_name'))
vp_installer.validate(storagerouter=storagerouter)
# Validate requested StorageDriver configurations
cls._logger.info(
'vPool {0}: Validating StorageDriver configurations'.format(
vp_installer.name))
sd_installer = StorageDriverInstaller(
vp_installer=vp_installer,
configurations={
'storage_ip': parameters.get('storage_ip'),
'caching_info': parameters.get('caching_info'),
'backend_info': {
'main':
parameters.get('backend_info'),
StorageDriverConfiguration.CACHE_BLOCK:
parameters.get('backend_info_bc'),
StorageDriverConfiguration.CACHE_FRAGMENT:
parameters.get('backend_info_fc')
},
'connection_info': {
'main':
parameters.get('connection_info'),
StorageDriverConfiguration.CACHE_BLOCK:
parameters.get('connection_info_bc'),
StorageDriverConfiguration.CACHE_FRAGMENT:
parameters.get('connection_info_fc')
},
'sd_configuration': parameters.get('config_params')
})
partitions_mutex = volatile_mutex('add_vpool_partitions_{0}'.format(
storagerouter.guid))
try:
# VPOOL CREATION
# Create the vPool as soon as possible in the process to be displayed in the GUI (INSTALLING/EXTENDING state)
if vp_installer.is_new is True:
vp_installer.create(rdma_enabled=sd_installer.rdma_enabled)
vp_installer.configure_mds(
config=parameters.get('mds_config_params', {}))
else:
vp_installer.update_status(status=VPool.STATUSES.EXTENDING)
# ADDITIONAL VALIDATIONS
# Check StorageRouter connectivity
cls._logger.info(
'vPool {0}: Validating StorageRouter connectivity'.format(
vp_installer.name))
linked_storagerouters = [storagerouter]
if vp_installer.is_new is False:
linked_storagerouters += [
sd.storagerouter
for sd in vp_installer.vpool.storagedrivers
]
sr_client_map = SSHClient.get_clients(
endpoints=linked_storagerouters, user_names=['ovs', 'root'])
offline_nodes = sr_client_map.pop('offline')
if storagerouter in offline_nodes:
raise RuntimeError(
'Node on which the vPool is being {0} is not reachable'.
format('created'
if vp_installer.is_new is True else 'extended'))
sr_installer = StorageRouterInstaller(
root_client=sr_client_map[storagerouter]['root'],
sd_installer=sd_installer,
vp_installer=vp_installer,
storagerouter=storagerouter)
# When 2 or more jobs simultaneously run on the same StorageRouter, we need to check and create the StorageDriver partitions in locked context
partitions_mutex.acquire(wait=60)
sr_installer.partition_info = StorageRouterController.get_partition_info(
storagerouter_guid=storagerouter.guid)
sr_installer.validate_vpool_extendable()
sr_installer.validate_global_write_buffer(
requested_size=parameters.get('writecache_size', 0))
sr_installer.validate_local_cache_size(
requested_proxies=parameters.get('parallelism', {}).get(
'proxies', 2))
# MODEL STORAGEDRIVER AND PARTITION JUNCTIONS
sd_installer.create()
sd_installer.create_partitions()
partitions_mutex.release()
vp_installer.refresh_metadata()
except Exception:
cls._logger.exception(
'Something went wrong during the validation or modeling of vPool {0} on StorageRouter {1}'
.format(vp_installer.name, storagerouter.name))
partitions_mutex.release()
vp_installer.revert_vpool(status=VPool.STATUSES.RUNNING)
raise
# Arakoon setup
counter = 0
while counter < 300:
try:
if StorageDriverController.manual_voldrv_arakoon_checkup(
) is True:
break
except Exception:
cls._logger.exception(
'Arakoon checkup for voldrv cluster failed')
vp_installer.revert_vpool(status=VPool.STATUSES.RUNNING)
raise
counter += 1
time.sleep(1)
if counter == 300:
vp_installer.revert_vpool(status=VPool.STATUSES.RUNNING)
raise RuntimeError(
'Arakoon checkup for the StorageDriver cluster could not be started'
)
# Cluster registry
try:
vp_installer.configure_cluster_registry(allow_raise=True)
except Exception:
if vp_installer.is_new is True:
vp_installer.revert_vpool(status=VPool.STATUSES.RUNNING)
else:
vp_installer.revert_vpool(status=VPool.STATUSES.FAILURE)
raise
try:
sd_installer.setup_proxy_configs()
sd_installer.configure_storagedriver_service()
DiskController.sync_with_reality(storagerouter.guid)
MDSServiceController.prepare_mds_service(
storagerouter=storagerouter, vpool=vp_installer.vpool)
# Update the MDS safety if changed via API (vpool.configuration will be available at this point also for the newly added StorageDriver)
vp_installer.vpool.invalidate_dynamics('configuration')
if vp_installer.mds_safety is not None and vp_installer.vpool.configuration[
'mds_config']['mds_safety'] != vp_installer.mds_safety:
Configuration.set(
key='/ovs/vpools/{0}/mds_config|mds_safety'.format(
vp_installer.vpool.guid),
value=vp_installer.mds_safety)
sd_installer.start_services(
) # Create and start watcher volumedriver, DTL, proxies and StorageDriver services
# Post creation/extension checkups
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(
vpool=vp_installer.vpool, offline_nodes=offline_nodes)
for sr, clients in sr_client_map.iteritems():
for current_storagedriver in [
sd for sd in sr.storagedrivers
if sd.vpool_guid == vp_installer.vpool.guid
]:
storagedriver_config = StorageDriverConfiguration(
vpool_guid=vp_installer.vpool.guid,
storagedriver_id=current_storagedriver.storagedriver_id
)
if storagedriver_config.config_missing is False:
# Filesystem section in StorageDriver configuration are all parameters used for vDisks created directly on the filesystem
# So when a vDisk gets created on the filesystem, these MDSes will be assigned to them
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=mds_config_set[
sr.guid])
storagedriver_config.save(client=clients['ovs'])
# Everything's reconfigured, refresh new cluster configuration
for current_storagedriver in vp_installer.vpool.storagedrivers:
if current_storagedriver.storagerouter not in sr_client_map:
continue
vp_installer.vpool.storagedriver_client.update_cluster_node_configs(
str(current_storagedriver.storagedriver_id),
req_timeout_secs=10)
except Exception:
cls._logger.exception('vPool {0}: Creation failed'.format(
vp_installer.name))
vp_installer.update_status(status=VPool.STATUSES.FAILURE)
raise
# When a node is offline, we can run into errors, but also when 1 or more volumes are not running
# Scheduled tasks below, so don't really care whether they succeed or not
try:
VDiskController.dtl_checkup(vpool_guid=vp_installer.vpool.guid,
ensure_single_timeout=600)
except:
pass
for vdisk in vp_installer.vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk_guid=vdisk.guid)
except:
pass
vp_installer.update_status(status=VPool.STATUSES.RUNNING)
cls._logger.info('Add vPool {0} ended successfully'.format(
vp_installer.name))
def mds_checkup():
"""
Validates the current MDS setup/configuration and takes actions where required
Actions:
* Verify which StorageRouters are available
* Make mapping between vPools and its StorageRouters
* For each vPool make sure every StorageRouter has at least 1 MDS service with capacity available
* For each vPool retrieve the optimal configuration and store it for each StorageDriver
* For each vPool run an ensure safety for all vDisks
:raises RuntimeError: When ensure safety fails for any vDisk
:return: None
:rtype: NoneType
"""
MDSServiceController._logger.info('Started')
# Verify StorageRouter availability
root_client_cache = {}
storagerouters = StorageRouterList.get_storagerouters()
storagerouters.sort(key=lambda _sr: ExtensionsToolbox.advanced_sort(
element=_sr.ip, separator='.'))
offline_nodes = []
for storagerouter in storagerouters:
try:
root_client = SSHClient(endpoint=storagerouter,
username='******')
MDSServiceController._logger.debug(
'StorageRouter {0} - ONLINE'.format(storagerouter.name))
except UnableToConnectException:
root_client = None
offline_nodes.append(storagerouter)
MDSServiceController._logger.error(
'StorageRouter {0} - OFFLINE'.format(storagerouter.name))
root_client_cache[storagerouter] = root_client
# Create mapping per vPool and its StorageRouters
mds_dict = collections.OrderedDict()
for vpool in sorted(VPoolList.get_vpools(), key=lambda k: k.name):
MDSServiceController._logger.info('vPool {0}'.format(vpool.name))
mds_dict[vpool] = {}
# Loop all StorageDrivers and add StorageDriver to mapping
for storagedriver in vpool.storagedrivers:
storagerouter = storagedriver.storagerouter
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {
'client': root_client_cache.get(storagerouter),
'services': [],
'storagedriver': storagedriver
}
# Loop all MDS Services and append services to appropriate vPool / StorageRouter combo
mds_services = vpool.mds_services
mds_services.sort(
key=lambda _mds_service: ExtensionsToolbox.advanced_sort(
element=_mds_service.service.storagerouter.ip,
separator='.'))
for mds_service in mds_services:
service = mds_service.service
storagerouter = service.storagerouter
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {
'client': root_client_cache.get(storagerouter),
'services': [],
'storagedriver': None
}
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - Service on port {2}'.
format(vpool.name, storagerouter.name, service.ports[0]))
mds_dict[vpool][storagerouter]['services'].append(mds_service)
failures = []
for vpool, storagerouter_info in mds_dict.iteritems():
# Make sure there's at least 1 MDS on every StorageRouter that's not overloaded
# Remove all MDS Services which have been manually marked for removal (by setting its capacity to 0)
max_load = Configuration.get(
'/ovs/vpools/{0}/mds_config|mds_maxload'.format(vpool.guid))
for storagerouter in sorted(storagerouter_info,
key=lambda k: k.ip):
total_load = 0.0
root_client = mds_dict[vpool][storagerouter]['client']
mds_services = mds_dict[vpool][storagerouter]['services']
for mds_service in list(
sorted(mds_services, key=lambda k: k.number)):
port = mds_service.service.ports[0]
number = mds_service.number
# Manual intervention required here in order for the MDS to be cleaned up
# @TODO: Remove this and make a dynamic calculation to check which MDSes to remove
if mds_service.capacity == 0 and len(
mds_service.vdisks_guids) == 0:
MDSServiceController._logger.warning(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Removing'
.format(vpool.name, storagerouter.name, number,
port))
try:
MDSServiceController.remove_mds_service(
mds_service=mds_service,
reconfigure=True,
allow_offline=root_client is None)
except Exception:
MDSServiceController._logger.exception(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Failed to remove'
.format(vpool.name, storagerouter.name, number,
port))
mds_services.remove(mds_service)
else:
_, next_load = MDSServiceController.get_mds_load(
mds_service=mds_service)
if next_load == float('inf'):
total_load = sys.maxint * -1 # Cast to lowest possible value if any MDS service capacity is set to infinity
else:
total_load += next_load
if next_load < max_load:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Capacity available - Load at {4}%'
.format(vpool.name, storagerouter.name, number,
port, next_load))
else:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: No capacity available - Load at {4}%'
.format(vpool.name, storagerouter.name, number,
port, next_load))
if total_load >= max_load * len(mds_services):
mds_services_to_add = int(
math.ceil((total_load - max_load * len(mds_services)) /
max_load))
MDSServiceController._logger.info(
'vPool {0} - StorageRouter {1} - Average load per service {2:.2f}% - Max load per service {3:.2f}% - {4} MDS service{5} will be added'
.format(vpool.name, storagerouter.name,
total_load / len(mds_services), max_load,
mds_services_to_add,
'' if mds_services_to_add == 1 else 's'))
for _ in range(mds_services_to_add):
MDSServiceController._logger.info(
'vPool {0} - StorageRouter {1} - Adding new MDS Service'
.format(vpool.name, storagerouter.name))
try:
mds_services.append(
MDSServiceController.prepare_mds_service(
storagerouter=storagerouter, vpool=vpool))
except Exception:
MDSServiceController._logger.exception(
'vPool {0} - StorageRouter {1} - Failed to create new MDS Service'
.format(vpool.name, storagerouter.name))
# After potentially having added new MDSes, retrieve the optimal configuration
mds_config_set = {}
try:
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(
vpool=vpool, offline_nodes=offline_nodes)
MDSServiceController._logger.debug(
'vPool {0} - Optimal configuration {1}'.format(
vpool.name, mds_config_set))
except (NotFoundException, RuntimeError):
MDSServiceController._logger.exception(
'vPool {0} - Failed to retrieve the optimal configuration'.
format(vpool.name))
# Apply the optimal MDS configuration per StorageDriver
for storagerouter in sorted(storagerouter_info,
key=lambda k: k.ip):
root_client = mds_dict[vpool][storagerouter]['client']
storagedriver = mds_dict[vpool][storagerouter]['storagedriver']
if storagedriver is None:
MDSServiceController._logger.critical(
'vPool {0} - StorageRouter {1} - No matching StorageDriver found'
.format(vpool.name, storagerouter.name))
continue
if storagerouter.guid not in mds_config_set:
MDSServiceController._logger.critical(
'vPool {0} - StorageRouter {1} - Not marked as offline, but could not retrieve an optimal MDS config'
.format(vpool.name, storagerouter.name))
continue
if root_client is None:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - Marked as offline, not setting optimal MDS configuration'
.format(vpool.name, storagerouter.name))
continue
storagedriver_config = StorageDriverConfiguration(
vpool_guid=vpool.guid,
storagedriver_id=storagedriver.storagedriver_id)
if storagedriver_config.config_missing is False:
optimal_mds_config = mds_config_set[storagerouter.guid]
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - Storing optimal MDS configuration: {2}'
.format(vpool.name, storagerouter.name,
optimal_mds_config))
# Filesystem section in StorageDriver configuration are all parameters used for vDisks created directly on the filesystem
# So when a vDisk gets created on the filesystem, these MDSes will be assigned to them
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=optimal_mds_config)
storagedriver_config.save(root_client)
# Execute a safety check, making sure the master/slave configuration is optimal.
MDSServiceController._logger.info(
'vPool {0} - Ensuring safety for all vDisks'.format(
vpool.name))
for vdisk in vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk_guid=vdisk.guid)
except Exception:
message = 'Ensure safety for vDisk {0} with guid {1} failed'.format(
vdisk.name, vdisk.guid)
MDSServiceController._logger.exception(message)
failures.append(message)
if len(failures) > 0:
raise RuntimeError('\n - ' + '\n - '.join(failures))
MDSServiceController._logger.info('Finished')
def mds_checkup_single(vpool_guid, mds_dict=None, offline_nodes=None):
# type: (str, collections.OrderedDict, List[StorageRouter]) -> None
"""
Validates the current MDS setup/configuration and takes actions where required
Actions:
* Verify which StorageRouters are available
* Make mapping between vPools and its StorageRouters
* For each vPool make sure every StorageRouter has at least 1 MDS service with capacity available
* For each vPool retrieve the optimal configuration and store it for each StorageDriver
* For each vPool run an ensure safety for all vDisks
:param vpool_guid: Guid of the VPool to do the checkup for
:type vpool_guid: str
:param mds_dict: OrderedDict containing all mds related information
:type mds_dict: collections.OrderedDict
:param offline_nodes: Nodes that are marked as unreachable
:type offline_nodes: List[StorageRouter]
:raises RuntimeError: When ensure safety fails for any vDisk
:return: None
:rtype: NoneType
:raises: MDSCheckupEnsureSafetyFailures when the ensure safety has failed for any vdisk
"""
params_to_verify = [mds_dict, offline_nodes]
vpool = VPool(vpool_guid)
if any(p is not None for p in params_to_verify) and not all(
p is not None for p in params_to_verify):
raise ValueError(
'Both mds_dict and offline_nodes must be given instead of providing either one'
)
if not mds_dict:
mds_dict, offline_nodes = MDSServiceController._get_mds_information(
[vpool])
ensure_safety_failures = []
storagerouter_info = mds_dict[vpool]
# Make sure there's at least 1 MDS on every StorageRouter that's not overloaded
# Remove all MDS Services which have been manually marked for removal (by setting its capacity to 0)
max_load = Configuration.get(
'/ovs/vpools/{0}/mds_config|mds_maxload'.format(vpool.guid))
for storagerouter in sorted(storagerouter_info, key=lambda k: k.ip):
total_load = 0.0
root_client = mds_dict[vpool][storagerouter]['client']
mds_services = mds_dict[vpool][storagerouter]['services']
for mds_service in list(
sorted(mds_services, key=lambda k: k.number)):
port = mds_service.service.ports[0]
number = mds_service.number
# Manual intervention required here in order for the MDS to be cleaned up
# @TODO: Remove this and make a dynamic calculation to check which MDSes to remove
if mds_service.capacity == 0 and len(
mds_service.vdisks_guids) == 0:
MDSServiceController._logger.warning(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Removing'
.format(vpool.name, storagerouter.name, number, port))
try:
MDSServiceController.remove_mds_service(
mds_service=mds_service,
reconfigure=True,
allow_offline=root_client is None)
except Exception:
MDSServiceController._logger.exception(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Failed to remove'
.format(vpool.name, storagerouter.name, number,
port))
mds_services.remove(mds_service)
else:
_, next_load = MDSServiceController.get_mds_load(
mds_service=mds_service)
if next_load == float('inf'):
total_load = sys.maxint * -1 # Cast to lowest possible value if any MDS service capacity is set to infinity
else:
total_load += next_load
if next_load < max_load:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: Capacity available - Load at {4}%'
.format(vpool.name, storagerouter.name, number,
port, next_load))
else:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - MDS Service {2} on port {3}: No capacity available - Load at {4}%'
.format(vpool.name, storagerouter.name, number,
port, next_load))
if total_load >= max_load * len(mds_services):
mds_services_to_add = int(
math.ceil((total_load - max_load * len(mds_services)) /
max_load))
MDSServiceController._logger.info(
'vPool {0} - StorageRouter {1} - Average load per service {2:.2f}% - Max load per service {3:.2f}% - {4} MDS service{5} will be added'
.format(vpool.name, storagerouter.name,
total_load / len(mds_services), max_load,
mds_services_to_add,
'' if mds_services_to_add == 1 else 's'))
for _ in range(mds_services_to_add):
MDSServiceController._logger.info(
'vPool {0} - StorageRouter {1} - Adding new MDS Service'
.format(vpool.name, storagerouter.name))
try:
mds_services.append(
MDSServiceController.prepare_mds_service(
storagerouter=storagerouter, vpool=vpool))
except Exception:
MDSServiceController._logger.exception(
'vPool {0} - StorageRouter {1} - Failed to create new MDS Service'
.format(vpool.name, storagerouter.name))
# After potentially having added new MDSes, retrieve the optimal configuration
mds_config_set = {}
try:
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(
vpool=vpool, offline_nodes=offline_nodes)
MDSServiceController._logger.debug(
'vPool {0} - Optimal configuration {1}'.format(
vpool.name, mds_config_set))
except (NotFoundException, RuntimeError):
MDSServiceController._logger.exception(
'vPool {0} - Failed to retrieve the optimal configuration'.
format(vpool.name))
# Apply the optimal MDS configuration per StorageDriver
for storagerouter in sorted(storagerouter_info, key=lambda k: k.ip):
root_client = mds_dict[vpool][storagerouter]['client']
storagedriver = mds_dict[vpool][storagerouter]['storagedriver']
if storagedriver is None:
MDSServiceController._logger.critical(
'vPool {0} - StorageRouter {1} - No matching StorageDriver found'
.format(vpool.name, storagerouter.name))
continue
if storagerouter.guid not in mds_config_set:
MDSServiceController._logger.critical(
'vPool {0} - StorageRouter {1} - Not marked as offline, but could not retrieve an optimal MDS config'
.format(vpool.name, storagerouter.name))
continue
if root_client is None:
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - Marked as offline, not setting optimal MDS configuration'
.format(vpool.name, storagerouter.name))
continue
storagedriver_config = StorageDriverConfiguration(
vpool_guid=vpool.guid,
storagedriver_id=storagedriver.storagedriver_id)
if storagedriver_config.config_missing is False:
optimal_mds_config = mds_config_set[storagerouter.guid]
MDSServiceController._logger.debug(
'vPool {0} - StorageRouter {1} - Storing optimal MDS configuration: {2}'
.format(vpool.name, storagerouter.name,
optimal_mds_config))
# Filesystem section in StorageDriver configuration are all parameters used for vDisks created directly on the filesystem
# So when a vDisk gets created on the filesystem, these MDSes will be assigned to them
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=optimal_mds_config)
storagedriver_config.save(root_client)
# Execute a safety check, making sure the master/slave configuration is optimal.
MDSServiceController._logger.info(
'vPool {0} - Ensuring safety for all vDisks'.format(vpool.name))
for vdisk in vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk_guid=vdisk.guid)
except Exception:
message = 'Ensure safety for vDisk {0} with guid {1} failed'.format(
vdisk.name, vdisk.guid)
MDSServiceController._logger.exception(message)
ensure_safety_failures.append(message)
if ensure_safety_failures:
raise MDSCheckupEnsureSafetyFailures(
'\n - ' + '\n - '.join(ensure_safety_failures))
def mds_checkup():
"""
Validates the current MDS setup/configuration and takes actions where required
"""
logger.info('MDS checkup - Started')
mds_dict = {}
for vpool in VPoolList.get_vpools():
logger.info('MDS checkup - vPool {0}'.format(vpool.name))
mds_dict[vpool] = {}
for mds_service in vpool.mds_services:
storagerouter = mds_service.service.storagerouter
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {'client': None,
'services': []}
try:
client = SSHClient(storagerouter, username = '******')
client.run('pwd')
mds_dict[vpool][storagerouter]['client'] = client
logger.info('MDS checkup - vPool {0} - Storage Router {1} - ONLINE'.format(vpool.name, storagerouter.name))
except UnableToConnectException:
logger.info('MDS checkup - vPool {0} - Storage Router {1} - OFFLINE'.format(vpool.name, storagerouter.name))
mds_dict[vpool][storagerouter]['services'].append(mds_service)
failures = []
max_load = EtcdConfiguration.get('/ovs/framework/storagedriver|mds_maxload')
for vpool, storagerouter_info in mds_dict.iteritems():
# 1. First, make sure there's at least one MDS on every StorageRouter that's not overloaded
# If not, create an extra MDS for that StorageRouter
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]['client']
mds_services = mds_dict[vpool][storagerouter]['services']
has_room = False
for mds_service in mds_services[:]:
if mds_service.capacity == 0 and len(mds_service.vdisks_guids) == 0:
logger.info('MDS checkup - Removing mds_service {0} for vPool {1}'.format(mds_service.number, vpool.name))
MDSServiceController.remove_mds_service(mds_service, vpool, reconfigure=True, allow_offline=client is None)
mds_services.remove(mds_service)
for mds_service in mds_services:
_, load = MDSServiceController.get_mds_load(mds_service)
if load < max_load:
has_room = True
break
logger.info('MDS checkup - vPool {0} - Storage Router {1} - Capacity available: {2}'.format(vpool.name, storagerouter.name, has_room))
if has_room is False and client is not None:
mds_service = MDSServiceController.prepare_mds_service(storagerouter=storagerouter,
vpool=vpool,
fresh_only=False,
reload_config=True)
if mds_service is None:
raise RuntimeError('Could not add MDS node')
mds_services.append(mds_service)
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(vpool, True)
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]['client']
if client is None:
logger.info('MDS checkup - vPool {0} - Storage Router {1} - Marked as offline, not setting default MDS configuration'.format(vpool.name, storagerouter.name))
continue
storagedriver_config = StorageDriverConfiguration('storagedriver', vpool.name)
storagedriver_config.load(client)
if storagedriver_config.is_new is False:
logger.info('MDS checkup - vPool {0} - Storage Router {1} - Storing default MDS configuration: {2}'.format(vpool.name, storagerouter.name, mds_config_set[storagerouter.guid]))
storagedriver_config.clean() # Clean out obsolete values
storagedriver_config.configure_filesystem(fs_metadata_backend_mds_nodes=mds_config_set[storagerouter.guid])
storagedriver_config.save(client)
# 2. Per VPool, execute a safety check, making sure the master/slave configuration is optimal.
logger.info('MDS checkup - vPool {0} - Ensuring safety for all virtual disks'.format(vpool.name))
for vdisk in vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk)
except Exception as ex:
failures.append('Ensure safety for vDisk {0} with guid {1} failed with error: {2}'.format(vdisk.name, vdisk.guid, ex))
if len(failures) > 0:
raise Exception('\n - ' + '\n - '.join(failures))
logger.info('MDS checkup - Finished')
def mds_checkup():
"""
Validates the current MDS setup/configuration and takes actions where required
"""
MDSServiceController._logger.info("MDS checkup - Started")
mds_dict = {}
for vpool in VPoolList.get_vpools():
MDSServiceController._logger.info("MDS checkup - vPool {0}".format(vpool.name))
mds_dict[vpool] = {}
for mds_service in vpool.mds_services:
storagerouter = mds_service.service.storagerouter
if storagerouter not in mds_dict[vpool]:
mds_dict[vpool][storagerouter] = {"client": None, "services": []}
try:
mds_dict[vpool][storagerouter]["client"] = SSHClient(storagerouter, username="******")
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Storage Router {1} - ONLINE".format(
vpool.name, storagerouter.name
)
)
except UnableToConnectException:
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Storage Router {1} - OFFLINE".format(
vpool.name, storagerouter.name
)
)
mds_dict[vpool][storagerouter]["services"].append(mds_service)
failures = []
max_load = Configuration.get("/ovs/framework/storagedriver|mds_maxload")
for vpool, storagerouter_info in mds_dict.iteritems():
# 1. First, make sure there's at least one MDS on every StorageRouter that's not overloaded
# If not, create an extra MDS for that StorageRouter
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]["client"]
mds_services = mds_dict[vpool][storagerouter]["services"]
has_room = False
for mds_service in mds_services[:]:
if mds_service.capacity == 0 and len(mds_service.vdisks_guids) == 0:
MDSServiceController._logger.info(
"MDS checkup - Removing mds_service {0} for vPool {1}".format(
mds_service.number, vpool.name
)
)
MDSServiceController.remove_mds_service(
mds_service, vpool, reconfigure=True, allow_offline=client is None
)
mds_services.remove(mds_service)
for mds_service in mds_services:
_, load = MDSServiceController.get_mds_load(mds_service)
if load < max_load:
has_room = True
break
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Storage Router {1} - Capacity available: {2}".format(
vpool.name, storagerouter.name, has_room
)
)
if has_room is False and client is not None:
mds_service = MDSServiceController.prepare_mds_service(
storagerouter=storagerouter, vpool=vpool, fresh_only=False, reload_config=True
)
if mds_service is None:
raise RuntimeError("Could not add MDS node")
mds_services.append(mds_service)
mds_config_set = MDSServiceController.get_mds_storagedriver_config_set(vpool, True)
for storagerouter in storagerouter_info:
client = mds_dict[vpool][storagerouter]["client"]
if client is None:
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Storage Router {1} - Marked as offline, not setting default MDS configuration".format(
vpool.name, storagerouter.name
)
)
continue
storagedriver = [sd for sd in storagerouter.storagedrivers if sd.vpool_guid == vpool.guid][0]
storagedriver_config = StorageDriverConfiguration(
"storagedriver", vpool.guid, storagedriver.storagedriver_id
)
storagedriver_config.load()
if storagedriver_config.is_new is False:
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Storage Router {1} - Storing default MDS configuration: {2}".format(
vpool.name, storagerouter.name, mds_config_set[storagerouter.guid]
)
)
storagedriver_config.configure_filesystem(
fs_metadata_backend_mds_nodes=mds_config_set[storagerouter.guid]
)
storagedriver_config.save(client)
# 2. Per VPool, execute a safety check, making sure the master/slave configuration is optimal.
MDSServiceController._logger.info(
"MDS checkup - vPool {0} - Ensuring safety for all virtual disks".format(vpool.name)
)
for vdisk in vpool.vdisks:
try:
MDSServiceController.ensure_safety(vdisk)
except Exception:
message = "Ensure safety for vDisk {0} with guid {1} failed".format(vdisk.name, vdisk.guid)
MDSServiceController._logger.exception(message)
failures.append(message)
if len(failures) > 0:
raise Exception("\n - " + "\n - ".join(failures))
MDSServiceController._logger.info("MDS checkup - Finished")
def configure_storagedriver_service(self):
"""
Configure the StorageDriver service
:return: None
:rtype: NoneType
"""
def _generate_queue_urls():
mq_user = Configuration.get('/ovs/framework/messagequeue|user')
mq_protocol = Configuration.get('/ovs/framework/messagequeue|protocol')
mq_password = Configuration.get('/ovs/framework/messagequeue|password')
return [{'amqp_uri': '{0}://{1}:{2}@{3}:5672'.format(mq_protocol, mq_user, mq_password, sr.ip)} for sr in StorageRouterList.get_masters()]
def _generate_config_file_system():
config = {'fs_dtl_host': '',
'fs_enable_shm_interface': 0,
'fs_enable_network_interface': 1,
'fs_metadata_backend_arakoon_cluster_nodes': [],
'fs_metadata_backend_mds_nodes': [],
'fs_metadata_backend_type': 'MDS',
'fs_virtual_disk_format': 'raw',
'fs_raw_disk_suffix': '.raw',
'fs_file_event_rules': [{'fs_file_event_rule_calls': ['Rename'],
'fs_file_event_rule_path_regex': '.*'}]}
if self.dtl_mode == StorageDriverClient.FRAMEWORK_DTL_NO_SYNC:
config['fs_dtl_config_mode'] = StorageDriverClient.VOLDRV_DTL_MANUAL_MODE
else:
config['fs_dtl_mode'] = StorageDriverClient.VPOOL_DTL_MODE_MAP[self.dtl_mode]
config['fs_dtl_config_mode'] = StorageDriverClient.VOLDRV_DTL_AUTOMATIC_MODE
return config
def _generate_config_backend_connection_manager():
config = {'backend_type': 'MULTI',
'backend_interface_retries_on_error': 5,
'backend_interface_retry_interval_secs': 1,
'backend_interface_retry_backoff_multiplier': 2.0}
for index, proxy in enumerate(sorted(self.storagedriver.alba_proxies, key=lambda k: k.service.ports[0])):
config[str(index)] = {'alba_connection_host': self.storagedriver.storage_ip,
'alba_connection_port': proxy.service.ports[0],
'alba_connection_preset': vpool.metadata['backend']['backend_info']['preset'],
'alba_connection_timeout': 30,
'alba_connection_use_rora': True,
'alba_connection_transport': 'TCP',
'alba_connection_rora_manifest_cache_capacity': 25000,
'alba_connection_asd_connection_pool_capacity': 10,
'alba_connection_rora_timeout_msecs': 50,
'backend_type': 'ALBA'}
return config
if self.sr_installer is None:
raise RuntimeError('No StorageRouterInstaller instance found')
if len(self.write_caches) == 0:
raise RuntimeError('The StorageDriverPartition junctions have not been created yet')
vpool = self.vp_installer.vpool
gap_configuration = StorageDriverController.calculate_trigger_and_backoff_gap(cache_size=self.sr_installer.smallest_write_partition_size)
arakoon_cluster_name = str(Configuration.get('/ovs/framework/arakoon_clusters|voldrv'))
arakoon_nodes = [{'host': node.ip,
'port': node.client_port,
'node_id': node.name} for node in ArakoonClusterConfig(cluster_id=arakoon_cluster_name).nodes]
storagedriver_config = StorageDriverConfiguration(vpool.guid, self.storagedriver.storagedriver_id)
storagedriver_config.configure_scocache(scocache_mount_points=self.write_caches,
trigger_gap=ExtensionsToolbox.convert_byte_size_to_human_readable(size=gap_configuration['trigger']),
backoff_gap=ExtensionsToolbox.convert_byte_size_to_human_readable(size=gap_configuration['backoff']))
storagedriver_config.configure_file_driver(fd_cache_path=self.storagedriver_partition_file_driver.path,
fd_extent_cache_capacity='1024',
fd_namespace='fd-{0}-{1}'.format(vpool.name, vpool.guid))
storagedriver_config.configure_volume_router(vrouter_id=self.storagedriver.storagedriver_id,
vrouter_redirect_timeout_ms='120000',
vrouter_keepalive_time_secs='15',
vrouter_keepalive_interval_secs='5',
vrouter_keepalive_retries='2',
vrouter_routing_retries=10,
vrouter_volume_read_threshold=0,
vrouter_volume_write_threshold=0,
vrouter_file_read_threshold=0,
vrouter_file_write_threshold=0,
vrouter_min_workers=4,
vrouter_max_workers=16,
vrouter_sco_multiplier=self.sco_size * 1024 / self.cluster_size,
vrouter_backend_sync_timeout_ms=60000,
vrouter_migrate_timeout_ms=60000,
vrouter_use_fencing=True)
storagedriver_config.configure_volume_manager(tlog_path=self.storagedriver_partition_tlogs.path,
metadata_path=self.storagedriver_partition_metadata.path,
clean_interval=1,
dtl_throttle_usecs=4000,
default_cluster_size=self.cluster_size * 1024,
number_of_scos_in_tlog=self.tlog_multiplier,
non_disposable_scos_factor=float(self.write_buffer) / self.tlog_multiplier / self.sco_size)
storagedriver_config.configure_event_publisher(events_amqp_routing_key=Configuration.get('/ovs/framework/messagequeue|queues.storagedriver'),
events_amqp_uris=_generate_queue_urls())
storagedriver_config.configure_volume_registry(vregistry_arakoon_cluster_id=arakoon_cluster_name,
vregistry_arakoon_cluster_nodes=arakoon_nodes)
storagedriver_config.configure_network_interface(network_max_neighbour_distance=StorageDriver.DISTANCES.FAR - 1)
storagedriver_config.configure_threadpool_component(num_threads=16)
storagedriver_config.configure_volume_router_cluster(vrouter_cluster_id=vpool.guid)
storagedriver_config.configure_distributed_lock_store(dls_type='Arakoon',
dls_arakoon_cluster_id=arakoon_cluster_name,
dls_arakoon_cluster_nodes=arakoon_nodes)
storagedriver_config.configure_content_addressed_cache(serialize_read_cache=False,
read_cache_serialization_path=[])
storagedriver_config.configure_distributed_transaction_log(dtl_path=self.storagedriver_partition_dtl.path, # Not used, but required
dtl_transport=StorageDriverClient.VPOOL_DTL_TRANSPORT_MAP[self.dtl_transport])
storagedriver_config.configure_filesystem(**_generate_config_file_system())
storagedriver_config.configure_backend_connection_manager(**_generate_config_backend_connection_manager())
storagedriver_config.save(client=self.sr_installer.root_client)
