def remove_arakoon_cluster(cluster_name, master_storagerouter_ip):
"""
Delete a whole arakoon cluster
:param cluster_name: name of a existing arakoon cluster
:type cluster_name: str
:param master_storagerouter_ip: master ip address of a existing arakoon cluster
:type master_storagerouter_ip: str
"""
ArakoonRemover.LOGGER.info(
"Starting removing arakoon cluster with name `{0}`, master_ip `{1}`"
.format(cluster_name, master_storagerouter_ip))
arakoon_installer = ArakoonInstaller(cluster_name)
arakoon_installer.load()
arakoon_installer.delete_cluster()
ArakoonRemover.LOGGER.info(
"Finished removing arakoon cluster with name `{0}`, master_ip `{1}`"
.format(cluster_name, master_storagerouter_ip))
def _on_demote(cluster_ip, master_ip, offline_node_ips=None):
"""
Handles the demote for the StorageDrivers
:param cluster_ip: IP of the node to demote
:type cluster_ip: str
:param master_ip: IP of the master node
:type master_ip: str
:param offline_node_ips: IPs of nodes which are offline
:type offline_node_ips: list
:return: None
"""
_ = master_ip
if offline_node_ips is None:
offline_node_ips = []
servicetype = ServiceTypeList.get_by_name(
ServiceType.SERVICE_TYPES.ARAKOON)
current_service = None
remaining_ips = []
for service in servicetype.services:
if service.name == 'arakoon-voldrv' and service.is_internal is True: # Externally managed arakoon cluster services do not have StorageRouters
if service.storagerouter.ip == cluster_ip:
current_service = service
elif service.storagerouter.ip not in offline_node_ips:
remaining_ips.append(service.storagerouter.ip)
if current_service is not None:
if len(remaining_ips) == 0:
raise RuntimeError(
'Could not find any remaining arakoon nodes for the voldrv cluster'
)
StorageDriverController._logger.debug(
'* Shrink StorageDriver cluster')
cluster_name = str(
Configuration.get('/ovs/framework/arakoon_clusters|voldrv'))
arakoon_installer = ArakoonInstaller(cluster_name=cluster_name)
arakoon_installer.load()
arakoon_installer.shrink_cluster(removal_ip=cluster_ip,
offline_nodes=offline_node_ips)
arakoon_installer.restart_cluster_after_shrinking()
current_service.delete()
StorageDriverController._configure_arakoon_to_volumedriver(
cluster_name=cluster_name)
def shrink_vpool(cls,
storagedriver_guid,
offline_storage_router_guids=list()):
"""
Removes a StorageDriver (if its the last StorageDriver for a vPool, the vPool is removed as well)
:param storagedriver_guid: Guid of the StorageDriver to remove
:type storagedriver_guid: str
:param offline_storage_router_guids: Guids of StorageRouters which are offline and will be removed from cluster.
WHETHER VPOOL WILL BE DELETED DEPENDS ON THIS
:type offline_storage_router_guids: list
:return: None
:rtype: NoneType
"""
# TODO: Add logging
# TODO: Unit test individual pieces of code
# Validations
storagedriver = StorageDriver(storagedriver_guid)
storagerouter = storagedriver.storagerouter
cls._logger.info(
'StorageDriver {0} - Deleting StorageDriver {1}'.format(
storagedriver.guid, storagedriver.name))
vp_installer = VPoolInstaller(name=storagedriver.vpool.name)
vp_installer.validate(storagedriver=storagedriver)
sd_installer = StorageDriverInstaller(vp_installer=vp_installer,
storagedriver=storagedriver)
cls._logger.info(
'StorageDriver {0} - Checking availability of related StorageRouters'
.format(storagedriver.guid, storagedriver.name))
sr_client_map = SSHClient.get_clients(endpoints=[
sd.storagerouter for sd in vp_installer.vpool.storagedrivers
],
user_names=['root'])
sr_installer = StorageRouterInstaller(root_client=sr_client_map.get(
storagerouter, {}).get('root'),
storagerouter=storagerouter,
vp_installer=vp_installer,
sd_installer=sd_installer)
offline_srs = sr_client_map.pop('offline')
if sorted([sr.guid for sr in offline_srs
]) != sorted(offline_storage_router_guids):
raise RuntimeError('Not all StorageRouters are reachable')
if storagerouter not in offline_srs:
mtpt_pids = sr_installer.root_client.run(
"lsof -t +D '/mnt/{0}' || true".format(
vp_installer.name.replace(r"'", r"'\''")),
allow_insecure=True).splitlines()
if len(mtpt_pids) > 0:
raise RuntimeError(
'vPool cannot be deleted. Following processes keep the vPool mount point occupied: {0}'
.format(', '.join(mtpt_pids)))
# Retrieve reachable StorageDrivers
reachable_storagedrivers = []
for sd in vp_installer.vpool.storagedrivers:
if sd.storagerouter not in sr_client_map:
# StorageRouter is offline
continue
sd_key = '/ovs/vpools/{0}/hosts/{1}/config'.format(
vp_installer.vpool.guid, sd.storagedriver_id)
if Configuration.exists(sd_key) is True:
path = Configuration.get_configuration_path(sd_key)
with remote(sd.storagerouter.ip,
[LocalStorageRouterClient]) as rem:
try:
lsrc = rem.LocalStorageRouterClient(path)
lsrc.server_revision(
) # 'Cheap' call to verify whether volumedriver is responsive
cls._logger.info(
'StorageDriver {0} - Responsive StorageDriver {1} on node with IP {2}'
.format(storagedriver.guid, sd.name,
sd.storagerouter.ip))
reachable_storagedrivers.append(sd)
except Exception as exception:
if not is_connection_failure(exception):
raise
if len(reachable_storagedrivers) == 0:
raise RuntimeError(
'Could not find any responsive node in the cluster')
# Start removal
if vp_installer.storagedriver_amount > 1:
vp_installer.update_status(status=VPool.STATUSES.SHRINKING)
else:
vp_installer.update_status(status=VPool.STATUSES.DELETING)
# Clean up stale vDisks
cls._logger.info('StorageDriver {0} - Removing stale vDisks'.format(
storagedriver.guid))
VDiskController.remove_stale_vdisks(vpool=vp_installer.vpool)
# Reconfigure the MDSes
cls._logger.info('StorageDriver {0} - Reconfiguring MDSes'.format(
storagedriver.guid))
for vdisk_guid in storagerouter.vdisks_guids:
try:
MDSServiceController.ensure_safety(
vdisk_guid=vdisk_guid,
excluded_storagerouter_guids=[storagerouter.guid] +
offline_storage_router_guids)
except Exception:
cls._logger.exception(
'StorageDriver {0} - vDisk {1} - Ensuring MDS safety failed'
.format(storagedriver.guid, vdisk_guid))
# Validate that all MDSes on current StorageRouter have been moved away
# Ensure safety does not always throw an error, that's why we perform this check here instead of in the Exception clause of above code
vdisks = []
for mds in vp_installer.mds_services:
for junction in mds.vdisks:
vdisk = junction.vdisk
if vdisk in vdisks:
continue
vdisks.append(vdisk)
cls._logger.critical(
'StorageDriver {0} - vDisk {1} {2} - MDS Services have not been migrated away'
.format(storagedriver.guid, vdisk.guid, vdisk.name))
if len(vdisks) > 0:
# Put back in RUNNING, so it can be used again. Errors keep on displaying in GUI now anyway
vp_installer.update_status(status=VPool.STATUSES.RUNNING)
raise RuntimeError(
'Not all MDS Services have been successfully migrated away')
# Start with actual removal
errors_found = False
if storagerouter not in offline_srs:
errors_found &= sd_installer.stop_services()
errors_found &= vp_installer.configure_cluster_registry(
exclude=[storagedriver], apply_on=reachable_storagedrivers)
errors_found &= vp_installer.update_node_distance_map()
errors_found &= vp_installer.remove_mds_services()
errors_found &= sd_installer.clean_config_management()
errors_found &= sd_installer.clean_model()
if storagerouter not in offline_srs:
errors_found &= sd_installer.clean_directories(
mountpoints=StorageRouterController.get_mountpoints(
client=sr_installer.root_client))
try:
DiskController.sync_with_reality(
storagerouter_guid=storagerouter.guid)
except Exception:
cls._logger.exception(
'StorageDriver {0} - Synchronizing disks with reality failed'
.format(storagedriver.guid))
errors_found = True
if vp_installer.storagedriver_amount > 1:
# Update the vPool metadata and run DTL checkup
vp_installer.vpool.metadata['caching_info'].pop(
sr_installer.storagerouter.guid, None)
vp_installer.vpool.save()
try:
VDiskController.dtl_checkup(vpool_guid=vp_installer.vpool.guid,
ensure_single_timeout=600)
except Exception:
cls._logger.exception(
'StorageDriver {0} - DTL checkup failed for vPool {1} with guid {2}'
.format(storagedriver.guid, vp_installer.name,
vp_installer.vpool.guid))
else:
cls._logger.info(
'StorageDriver {0} - Removing vPool from model'.format(
storagedriver.guid))
# Clean up model
try:
vp_installer.vpool.delete()
except Exception:
errors_found = True
cls._logger.exception(
'StorageDriver {0} - Cleaning up vPool from the model failed'
.format(storagedriver.guid))
Configuration.delete('/ovs/vpools/{0}'.format(
vp_installer.vpool.guid))
cls._logger.info('StorageDriver {0} - Running MDS checkup'.format(
storagedriver.guid))
try:
MDSServiceController.mds_checkup()
except Exception:
cls._logger.exception(
'StorageDriver {0} - MDS checkup failed'.format(
storagedriver.guid))
# Update vPool status
if errors_found is True:
if vp_installer.storagedriver_amount > 1:
vp_installer.update_status(status=VPool.STATUSES.FAILURE)
raise RuntimeError(
'1 or more errors occurred while trying to remove the StorageDriver. Please check the logs for more information'
)
if vp_installer.storagedriver_amount > 1:
vp_installer.update_status(status=VPool.STATUSES.RUNNING)
cls._logger.info(
'StorageDriver {0} - Deleted StorageDriver {1}'.format(
storagedriver.guid, storagedriver.name))
if len(VPoolList.get_vpools()) == 0:
cluster_name = ArakoonInstaller.get_cluster_name('voldrv')
if ArakoonInstaller.get_arakoon_metadata_by_cluster_name(
cluster_name=cluster_name)['internal'] is True:
cls._logger.debug(
'StorageDriver {0} - Removing Arakoon cluster {1}'.format(
storagedriver.guid, cluster_name))
try:
installer = ArakoonInstaller(cluster_name=cluster_name)
installer.load()
installer.delete_cluster()
except Exception:
cls._logger.exception(
'StorageDriver {0} - Delete voldrv Arakoon cluster failed'
.format(storagedriver.guid))
service_type = ServiceTypeList.get_by_name(
ServiceType.SERVICE_TYPES.ARAKOON)
service_name = ArakoonInstaller.get_service_name_for_cluster(
cluster_name=cluster_name)
for service in list(service_type.services):
if service.name == service_name:
service.delete()
# Remove watcher volumedriver service if last StorageDriver on current StorageRouter
if len(
storagerouter.storagedrivers
) == 0 and storagerouter not in offline_srs: # ensure client is initialized for StorageRouter
try:
if cls._service_manager.has_service(
ServiceFactory.SERVICE_WATCHER_VOLDRV,
client=sr_installer.root_client):
cls._service_manager.stop_service(
ServiceFactory.SERVICE_WATCHER_VOLDRV,
client=sr_installer.root_client)
cls._service_manager.remove_service(
ServiceFactory.SERVICE_WATCHER_VOLDRV,
client=sr_installer.root_client)
except Exception:
cls._logger.exception(
'StorageDriver {0} - {1} service deletion failed'.format(
storagedriver.guid,
ServiceFactory.SERVICE_WATCHER_VOLDRV))
def extend_arakoon(cluster_name,
master_storagerouter_ip,
storagerouter_ip,
cluster_basedir,
service_type=ServiceType.ARAKOON_CLUSTER_TYPES.FWK,
clustered_nodes=None):
"""
Adds a external arakoon to a storagerouter
:param cluster_name: name of the already existing arakoon cluster
:type cluster_name: str
:param master_storagerouter_ip: master ip address of the existing arakoon cluster
e.g. 10.100.199.11
:type master_storagerouter_ip: str
:param storagerouter_ip: ip of a new storagerouter to extend to
e.g. 10.100.199.12
:type storagerouter_ip: str
:param cluster_basedir: absolute path for the new arakoon cluster
:type cluster_basedir: str
:param service_type: type of plugin for arakoon (DEFAULT=ServiceType.ARAKOON_CLUSTER_TYPES.FWK)
* FWK
* ABM
* NSM
:type service_type: ovs.dal.hybrids.ServiceType.ARAKOON_CLUSTER_TYPES
:param clustered_nodes: nodes who are available for the arakoon (including the to be extended_arakoon)
e.g. ['10.100.199.11', '10.100.199.12'] (DEFAULT=[])
:type clustered_nodes: list
:return: is created or not
:rtype: bool
"""
if clustered_nodes is None:
clustered_nodes = []
client = SSHClient(storagerouter_ip, username='******')
# create required directories
if not client.dir_exists(cluster_basedir):
client.dir_create(cluster_basedir)
ArakoonSetup.LOGGER.info(
"Starting extending arakoon cluster with name `{0}`, master_ip `{1}`, slave_ip `{2}`, base_dir `{3}`"
.format(cluster_name, master_storagerouter_ip, storagerouter_ip,
cluster_basedir))
arakoon_installer = ArakoonInstaller(cluster_name)
arakoon_installer.load()
arakoon_installer.extend_cluster(
new_ip=storagerouter_ip,
base_dir=cluster_basedir,
locked=False,
log_sinks=Logger.get_sink_path('automation_lib_arakoon_server'),
crash_log_sinks=Logger.get_sink_path(
'automation_lib_arakoon_server_crash'))
if service_type == ServiceType.ARAKOON_CLUSTER_TYPES.ABM:
client.run([
'ln', '-s', '/usr/lib/alba/albamgr_plugin.cmxs',
'{0}/arakoon/{1}/db'.format(cluster_basedir, cluster_name)
])
elif service_type == ServiceType.ARAKOON_CLUSTER_TYPES.NSM:
client.run([
'ln', '-s', '/usr/lib/alba/nsm_host_plugin.cmxs',
'{0}/arakoon/{1}/db'.format(cluster_basedir, cluster_name)
])
# checking if we need to restart the given nodes
if len(clustered_nodes) != 0:
ArakoonSetup.LOGGER.info(
"Trying to restart all given nodes of arakoon: {0}".format(
clustered_nodes, cluster_name))
arakoon_installer.restart_cluster_after_extending(
new_ip=storagerouter_ip)
ArakoonSetup.LOGGER.info(
"Finished restarting all given nodes of arakoon: {0}".format(
clustered_nodes, cluster_name))
ArakoonSetup.LOGGER.info(
"Finished extending arakoon cluster with name `{0}`, master_ip `{1}`, slave_ip `{2}`, base_dir `{3}`"
.format(cluster_name, master_storagerouter_ip, storagerouter_ip,
cluster_basedir))
def _voldrv_arakoon_checkup(create_cluster):
def _add_service(service_storagerouter, arakoon_ports, service_name):
""" Add a service to the storage router """
new_service = Service()
new_service.name = service_name
new_service.type = service_type
new_service.ports = arakoon_ports
new_service.storagerouter = service_storagerouter
new_service.save()
return new_service
current_ips = []
current_services = []
service_type = ServiceTypeList.get_by_name(
ServiceType.SERVICE_TYPES.ARAKOON)
cluster_name = Configuration.get(
'/ovs/framework/arakoon_clusters').get('voldrv')
if cluster_name is not None:
arakoon_service_name = ArakoonInstaller.get_service_name_for_cluster(
cluster_name=cluster_name)
for service in service_type.services:
if service.name == arakoon_service_name:
current_services.append(service)
if service.is_internal is True:
current_ips.append(service.storagerouter.ip)
all_sr_ips = [
storagerouter.ip
for storagerouter in StorageRouterList.get_slaves()
]
available_storagerouters = {}
for storagerouter in StorageRouterList.get_masters():
storagerouter.invalidate_dynamics(['partition_config'])
if len(storagerouter.partition_config[DiskPartition.ROLES.DB]) > 0:
available_storagerouters[storagerouter] = DiskPartition(
storagerouter.partition_config[DiskPartition.ROLES.DB][0])
all_sr_ips.append(storagerouter.ip)
if create_cluster is True and len(
current_services) == 0: # Create new cluster
metadata = ArakoonInstaller.get_unused_arakoon_metadata_and_claim(
cluster_type=ServiceType.ARAKOON_CLUSTER_TYPES.SD)
if metadata is None: # No externally managed cluster found, we create 1 ourselves
if not available_storagerouters:
raise RuntimeError(
'Could not find any Storage Router with a DB role')
storagerouter, partition = available_storagerouters.items()[0]
arakoon_voldrv_cluster = 'voldrv'
arakoon_installer = ArakoonInstaller(
cluster_name=arakoon_voldrv_cluster)
arakoon_installer.create_cluster(
cluster_type=ServiceType.ARAKOON_CLUSTER_TYPES.SD,
ip=storagerouter.ip,
base_dir=partition.folder,
log_sinks=LogHandler.get_sink_path(
'arakoon-server_{0}'.format(arakoon_voldrv_cluster)),
crash_log_sinks=LogHandler.get_sink_path(
'arakoon-server-crash_{0}'.format(
arakoon_voldrv_cluster)))
arakoon_installer.start_cluster()
ports = arakoon_installer.ports[storagerouter.ip]
metadata = arakoon_installer.metadata
current_ips.append(storagerouter.ip)
else:
ports = []
storagerouter = None
cluster_name = metadata['cluster_name']
Configuration.set('/ovs/framework/arakoon_clusters|voldrv',
cluster_name)
StorageDriverController._logger.info(
'Claiming {0} managed arakoon cluster: {1}'.format(
'externally' if storagerouter is None else 'internally',
cluster_name))
StorageDriverController._configure_arakoon_to_volumedriver(
cluster_name=cluster_name)
current_services.append(
_add_service(
service_storagerouter=storagerouter,
arakoon_ports=ports,
service_name=ArakoonInstaller.get_service_name_for_cluster(
cluster_name=cluster_name)))
cluster_name = Configuration.get(
'/ovs/framework/arakoon_clusters').get('voldrv')
if cluster_name is None:
return
metadata = ArakoonInstaller.get_arakoon_metadata_by_cluster_name(
cluster_name=cluster_name)
if 0 < len(current_services) < len(
available_storagerouters) and metadata['internal'] is True:
for storagerouter, partition in available_storagerouters.iteritems(
):
if storagerouter.ip in current_ips:
continue
arakoon_installer = ArakoonInstaller(cluster_name=cluster_name)
arakoon_installer.load()
arakoon_installer.extend_cluster(
new_ip=storagerouter.ip,
base_dir=partition.folder,
log_sinks=LogHandler.get_sink_path(
'arakoon-server_{0}'.format(cluster_name)),
crash_log_sinks=LogHandler.get_sink_path(
'arakoon-server-crash_{0}'.format(cluster_name)))
_add_service(
service_storagerouter=storagerouter,
arakoon_ports=arakoon_installer.ports[storagerouter.ip],
service_name=ArakoonInstaller.get_service_name_for_cluster(
cluster_name=cluster_name))
current_ips.append(storagerouter.ip)
arakoon_installer.restart_cluster_after_extending(
new_ip=storagerouter.ip)
StorageDriverController._configure_arakoon_to_volumedriver(
cluster_name=cluster_name)
def demote_node(cluster_ip,
master_ip,
ip_client_map,
unique_id,
unconfigure_memcached,
unconfigure_rabbitmq,
offline_nodes=None):
"""
Demotes a given node
"""
from ovs.dal.lists.storagerouterlist import StorageRouterList
Toolbox.log(logger=NodeTypeController._logger,
messages='Demoting node',
title=True)
service_manager = ServiceFactory.get_manager()
if offline_nodes is None:
offline_nodes = []
if unconfigure_memcached is True and len(offline_nodes) == 0:
if NodeTypeController._validate_local_memcache_servers(
ip_client_map) is False:
raise RuntimeError(
'Not all memcache nodes can be reached which is required for demoting a node.'
)
# Find other (arakoon) master nodes
arakoon_cluster_name = str(
Configuration.get('/ovs/framework/arakoon_clusters|ovsdb'))
arakoon_metadata = ArakoonInstaller.get_arakoon_metadata_by_cluster_name(
cluster_name=arakoon_cluster_name)
config = ArakoonClusterConfig(cluster_id=arakoon_cluster_name)
master_node_ips = [node.ip for node in config.nodes]
shrink = False
if cluster_ip in master_node_ips:
shrink = True
master_node_ips.remove(cluster_ip)
if len(master_node_ips) == 0:
raise RuntimeError(
'There should be at least one other master node')
storagerouter = StorageRouterList.get_by_machine_id(unique_id)
storagerouter.node_type = 'EXTRA'
storagerouter.save()
offline_node_ips = [node.ip for node in offline_nodes]
if arakoon_metadata['internal'] is True and shrink is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Leaving Arakoon {0} cluster'.format(
arakoon_cluster_name))
arakoon_installer = ArakoonInstaller(
cluster_name=arakoon_cluster_name)
arakoon_installer.load()
arakoon_installer.shrink_cluster(removal_ip=cluster_ip,
offline_nodes=offline_node_ips)
arakoon_installer.restart_cluster_after_shrinking()
try:
external_config = Configuration.get(
'/ovs/framework/external_config')
if external_config is None and shrink is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Leaving Arakoon config cluster')
arakoon_installer = ArakoonInstaller(cluster_name='config')
arakoon_installer.load(ip=master_node_ips[0])
arakoon_installer.shrink_cluster(
removal_ip=cluster_ip, offline_nodes=offline_node_ips)
arakoon_installer.restart_cluster_after_shrinking()
except Exception as ex:
Toolbox.log(
logger=NodeTypeController._logger,
messages=['\nFailed to leave configuration cluster', ex],
loglevel='exception')
Toolbox.log(logger=NodeTypeController._logger,
messages='Update configurations')
try:
if unconfigure_memcached is True:
endpoints = Configuration.get(
'/ovs/framework/memcache|endpoints')
endpoint = '{0}:{1}'.format(cluster_ip, 11211)
if endpoint in endpoints:
endpoints.remove(endpoint)
Configuration.set('/ovs/framework/memcache|endpoints',
endpoints)
if unconfigure_rabbitmq is True:
endpoints = Configuration.get(
'/ovs/framework/messagequeue|endpoints')
endpoint = '{0}:{1}'.format(cluster_ip, 5672)
if endpoint in endpoints:
endpoints.remove(endpoint)
Configuration.set('/ovs/framework/messagequeue|endpoints',
endpoints)
except Exception as ex:
Toolbox.log(logger=NodeTypeController._logger,
messages=['\nFailed to update configurations', ex],
loglevel='exception')
if arakoon_metadata['internal'] is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting master node services')
remaining_nodes = ip_client_map.keys()[:]
if cluster_ip in remaining_nodes:
remaining_nodes.remove(cluster_ip)
PersistentFactory.store = None
VolatileFactory.store = None
for service in storagerouter.services:
if service.name == 'arakoon-ovsdb':
service.delete()
target_client = None
if storagerouter in offline_nodes:
if unconfigure_rabbitmq is True:
Toolbox.log(
logger=NodeTypeController._logger,
messages='Removing/unconfiguring offline RabbitMQ node')
client = ip_client_map[master_ip]
try:
client.run([
'rabbitmqctl', 'forget_cluster_node',
'rabbit@{0}'.format(storagerouter.name)
])
except Exception as ex:
Toolbox.log(logger=NodeTypeController._logger,
messages=[
'\nFailed to forget RabbitMQ cluster node',
ex
],
loglevel='exception')
else:
target_client = ip_client_map[cluster_ip]
if unconfigure_rabbitmq is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Removing/unconfiguring RabbitMQ')
try:
if service_manager.has_service('rabbitmq-server',
client=target_client):
ServiceFactory.change_service_state(
target_client, 'rabbitmq-server', 'stop',
NodeTypeController._logger)
target_client.run(['rabbitmq-server', '-detached'])
time.sleep(5)
target_client.run(['rabbitmqctl', 'stop_app'])
time.sleep(5)
target_client.run(['rabbitmqctl', 'reset'])
time.sleep(5)
target_client.run(['rabbitmqctl', 'stop'])
time.sleep(5)
target_client.file_unlink(
"/var/lib/rabbitmq/.erlang.cookie")
ServiceFactory.change_service_state(
target_client, 'rabbitmq-server', 'stop',
NodeTypeController._logger) # To be sure
except Exception as ex:
Toolbox.log(logger=NodeTypeController._logger,
messages=[
'\nFailed to remove/unconfigure RabbitMQ',
ex
],
loglevel='exception')
Toolbox.log(logger=NodeTypeController._logger,
messages='Stopping services')
services = ['memcached', 'rabbitmq-server']
if unconfigure_rabbitmq is False:
services.remove('rabbitmq-server')
if unconfigure_memcached is False:
services.remove('memcached')
for service in services:
if service_manager.has_service(service, client=target_client):
Toolbox.log(
logger=NodeTypeController._logger,
messages='Stopping service {0}'.format(service))
try:
ServiceFactory.change_service_state(
target_client, service, 'stop',
NodeTypeController._logger)
except Exception as ex:
Toolbox.log(
logger=NodeTypeController._logger,
messages=[
'\nFailed to stop service'.format(service), ex
],
loglevel='exception')
Toolbox.log(logger=NodeTypeController._logger,
messages='Removing services')
services = [
'scheduled-tasks', 'webapp-api', 'volumerouter-consumer'
]
for service in services:
if service_manager.has_service(service, client=target_client):
Toolbox.log(
logger=NodeTypeController._logger,
messages='Removing service {0}'.format(service))
try:
ServiceFactory.change_service_state(
target_client, service, 'stop',
NodeTypeController._logger)
service_manager.remove_service(service,
client=target_client)
except Exception as ex:
Toolbox.log(
logger=NodeTypeController._logger,
messages=[
'\nFailed to remove service'.format(service),
ex
],
loglevel='exception')
if service_manager.has_service('workers', client=target_client):
service_manager.add_service(
name='workers',
client=target_client,
params={'WORKER_QUEUE': '{0}'.format(unique_id)})
try:
NodeTypeController._configure_amqp_to_volumedriver()
except Exception as ex:
Toolbox.log(
logger=NodeTypeController._logger,
messages=['\nFailed to configure AMQP to Storage Driver', ex],
loglevel='exception')
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting services')
NodeTypeController.restart_framework_and_memcache_services(
clients=ip_client_map,
logger=NodeTypeController._logger,
offline_node_ips=offline_node_ips)
if Toolbox.run_hooks(component='nodetype',
sub_component='demote',
logger=NodeTypeController._logger,
cluster_ip=cluster_ip,
master_ip=master_ip,
offline_node_ips=offline_node_ips):
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting services')
NodeTypeController.restart_framework_and_memcache_services(
clients=ip_client_map,
logger=NodeTypeController._logger,
offline_node_ips=offline_node_ips)
if storagerouter not in offline_nodes:
target_client = ip_client_map[cluster_ip]
node_name, _ = target_client.get_hostname()
if NodeTypeController.avahi_installed(
client=target_client,
logger=NodeTypeController._logger) is True:
NodeTypeController.configure_avahi(
client=target_client,
node_name=node_name,
node_type='extra',
logger=NodeTypeController._logger)
Configuration.set(
'/ovs/framework/hosts/{0}/type'.format(storagerouter.machine_id),
'EXTRA')
if target_client is not None and target_client.file_exists(
'/tmp/ovs_rollback'):
target_client.file_write('/tmp/ovs_rollback', 'rollback')
Toolbox.log(logger=NodeTypeController._logger,
messages='Demote complete',
title=True)
def promote_node(cluster_ip, master_ip, ip_client_map, unique_id,
configure_memcached, configure_rabbitmq):
"""
Promotes a given node
"""
from ovs.dal.lists.storagerouterlist import StorageRouterList
from ovs.dal.lists.servicetypelist import ServiceTypeList
from ovs.dal.lists.servicelist import ServiceList
from ovs.dal.hybrids.service import Service
Toolbox.log(logger=NodeTypeController._logger,
messages='Promoting node',
title=True)
service_manager = ServiceFactory.get_manager()
if configure_memcached is True:
if NodeTypeController._validate_local_memcache_servers(
ip_client_map) is False:
raise RuntimeError(
'Not all memcache nodes can be reached which is required for promoting a node.'
)
target_client = ip_client_map[cluster_ip]
machine_id = System.get_my_machine_id(target_client)
node_name, _ = target_client.get_hostname()
master_client = ip_client_map[master_ip]
storagerouter = StorageRouterList.get_by_machine_id(unique_id)
storagerouter.node_type = 'MASTER'
storagerouter.save()
external_config = Configuration.get('/ovs/framework/external_config')
if external_config is None:
Toolbox.log(logger=NodeTypeController._logger,
messages='Joining Arakoon configuration cluster')
arakoon_installer = ArakoonInstaller(cluster_name='config')
arakoon_installer.load(ip=master_ip)
arakoon_installer.extend_cluster(
new_ip=cluster_ip,
base_dir=Configuration.get('/ovs/framework/paths|ovsdb'))
arakoon_installer.restart_cluster_after_extending(
new_ip=cluster_ip)
service_manager.register_service(
node_name=machine_id,
service_metadata=arakoon_installer.service_metadata[cluster_ip]
)
# Find other (arakoon) master nodes
arakoon_cluster_name = str(
Configuration.get('/ovs/framework/arakoon_clusters|ovsdb'))
arakoon_metadata = ArakoonInstaller.get_arakoon_metadata_by_cluster_name(
cluster_name=arakoon_cluster_name)
config = ArakoonClusterConfig(cluster_id=arakoon_cluster_name)
master_node_ips = [node.ip for node in config.nodes]
if cluster_ip in master_node_ips:
master_node_ips.remove(cluster_ip)
if len(master_node_ips) == 0:
raise RuntimeError(
'There should be at least one other master node')
arakoon_ports = []
if arakoon_metadata['internal'] is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Joining Arakoon OVS DB cluster')
arakoon_installer = ArakoonInstaller(
cluster_name=arakoon_cluster_name)
arakoon_installer.load()
arakoon_installer.extend_cluster(
new_ip=cluster_ip,
base_dir=Configuration.get('/ovs/framework/paths|ovsdb'))
arakoon_installer.restart_cluster_after_extending(
new_ip=cluster_ip)
arakoon_ports = arakoon_installer.ports[cluster_ip]
if configure_memcached is True:
NodeTypeController.configure_memcached(
client=target_client, logger=NodeTypeController._logger)
NodeTypeController.add_services(client=target_client,
node_type='master',
logger=NodeTypeController._logger)
Toolbox.log(logger=NodeTypeController._logger,
messages='Update configurations')
if configure_memcached is True:
endpoints = Configuration.get('/ovs/framework/memcache|endpoints')
endpoint = '{0}:11211'.format(cluster_ip)
if endpoint not in endpoints:
endpoints.append(endpoint)
Configuration.set('/ovs/framework/memcache|endpoints',
endpoints)
if configure_rabbitmq is True:
endpoints = Configuration.get(
'/ovs/framework/messagequeue|endpoints')
endpoint = '{0}:5672'.format(cluster_ip)
if endpoint not in endpoints:
endpoints.append(endpoint)
Configuration.set('/ovs/framework/messagequeue|endpoints',
endpoints)
if arakoon_metadata['internal'] is True:
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting master node services')
PersistentFactory.store = None
VolatileFactory.store = None
if 'arakoon-ovsdb' not in [
s.name for s in ServiceList.get_services() if
s.is_internal is False or s.storagerouter.ip == cluster_ip
]:
service = Service()
service.name = 'arakoon-ovsdb'
service.type = ServiceTypeList.get_by_name(
ServiceType.SERVICE_TYPES.ARAKOON)
service.ports = arakoon_ports
service.storagerouter = storagerouter
service.save()
if configure_rabbitmq is True:
NodeTypeController.configure_rabbitmq(
client=target_client, logger=NodeTypeController._logger)
# Copy rabbitmq cookie
rabbitmq_cookie_file = '/var/lib/rabbitmq/.erlang.cookie'
Toolbox.log(logger=NodeTypeController._logger,
messages='Copying RabbitMQ cookie')
contents = master_client.file_read(rabbitmq_cookie_file)
master_hostname, _ = master_client.get_hostname()
target_client.dir_create(os.path.dirname(rabbitmq_cookie_file))
target_client.file_write(rabbitmq_cookie_file, contents)
target_client.file_chmod(rabbitmq_cookie_file, mode=0400)
target_client.run(['rabbitmq-server', '-detached'])
time.sleep(5)
target_client.run(['rabbitmqctl', 'stop_app'])
time.sleep(5)
target_client.run([
'rabbitmqctl', 'join_cluster',
'rabbit@{0}'.format(master_hostname)
])
time.sleep(5)
target_client.run(['rabbitmqctl', 'stop'])
time.sleep(5)
# Enable HA for the rabbitMQ queues
ServiceFactory.change_service_state(target_client,
'rabbitmq-server', 'start',
NodeTypeController._logger)
NodeTypeController.check_rabbitmq_and_enable_ha_mode(
client=target_client, logger=NodeTypeController._logger)
NodeTypeController._configure_amqp_to_volumedriver()
Toolbox.log(logger=NodeTypeController._logger,
messages='Starting services')
services = ['memcached', 'arakoon-ovsdb', 'rabbitmq-server']
if arakoon_metadata['internal'] is True:
services.remove('arakoon-ovsdb')
for service in services:
if service_manager.has_service(service, client=target_client):
ServiceFactory.change_service_state(target_client, service,
'start',
NodeTypeController._logger)
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting services')
NodeTypeController.restart_framework_and_memcache_services(
clients=ip_client_map, logger=NodeTypeController._logger)
if Toolbox.run_hooks(component='nodetype',
sub_component='promote',
logger=NodeTypeController._logger,
cluster_ip=cluster_ip,
master_ip=master_ip):
Toolbox.log(logger=NodeTypeController._logger,
messages='Restarting services')
NodeTypeController.restart_framework_and_memcache_services(
clients=ip_client_map, logger=NodeTypeController._logger)
if NodeTypeController.avahi_installed(
client=target_client,
logger=NodeTypeController._logger) is True:
NodeTypeController.configure_avahi(
client=target_client,
node_name=node_name,
node_type='master',
logger=NodeTypeController._logger)
Configuration.set('/ovs/framework/hosts/{0}/type'.format(machine_id),
'MASTER')
target_client.run(
['chown', '-R', 'ovs:ovs', '/opt/OpenvStorage/config'])
Configuration.set(
'/ovs/framework/hosts/{0}/promotecompleted'.format(machine_id),
True)
if target_client.file_exists('/tmp/ovs_rollback'):
target_client.file_delete('/tmp/ovs_rollback')
Toolbox.log(logger=NodeTypeController._logger,
messages='Promote complete')
def ensure_nsm_clusters_load(cls,
alba_backend,
nsms_per_storagerouter=None,
min_internal_nsms=1,
external_nsm_cluster_names=None,
version_str=None,
ssh_clients=None):
# type: (AlbaBackend, Optional[Dict[StorageRouter, int]], Optional[int], Optional[List[str], Optional[str]], Optional[StorageRouter, SSHClient]) -> None
"""
Ensure that all NSM clusters are not overloaded
:param alba_backend: Alba Backend to ensure NSM Cluster load for
:type alba_backend: AlbaBackend
:param nsms_per_storagerouter: Amount of NSMs mapped by StorageRouter
:type nsms_per_storagerouter: Dict[StorageRouter, int]
:param min_internal_nsms: Minimum amount of NSM hosts that need to be provided
:type min_internal_nsms: int
:param external_nsm_cluster_names: Information about the additional clusters to claim (only for externally managed Arakoon clusters)
:type external_nsm_cluster_names: list
:param version_str: Alba version string
:type version_str: str
:param ssh_clients: SSHClients to use
:type ssh_clients: Dict[Storagerouter, SSHClient]
:return: None
:rtype: NoneType
"""
if ssh_clients is None:
ssh_clients = {}
if external_nsm_cluster_names is None:
external_nsm_cluster_names = []
nsms_per_storagerouter = nsms_per_storagerouter if nsms_per_storagerouter is not None else cls.get_nsms_per_storagerouter(
alba_backend)
version_str = version_str or AlbaArakoonInstaller.get_alba_version_string(
)
nsm_loads = cls.get_nsm_loads(alba_backend)
internal = AlbaArakoonInstaller.is_internally_managed(alba_backend)
abm_cluster_name = alba_backend.abm_cluster.name
safety = Configuration.get(
'/ovs/framework/plugins/alba/config|nsm.safety')
maxload = Configuration.get(
'/ovs/framework/plugins/alba/config|nsm.maxload')
overloaded = min(nsm_loads.values()) >= maxload
if not overloaded:
# At least 1 NSM is not overloaded yet
AlbaArakoonController._logger.debug(
'ALBA Backend {0} - NSM load OK'.format(alba_backend.name))
if internal:
# When load is not OK, deploy at least 1 additional NSM
nsms_to_add = max(0, min_internal_nsms - len(nsm_loads))
else:
nsms_to_add = len(external_nsm_cluster_names)
if nsms_to_add == 0:
return
else:
AlbaArakoonController._logger.warning(
'ALBA Backend {0} - NSM load is NOT OK'.format(
alba_backend.name))
if internal:
# When load is not OK, deploy at least 1 additional NSM
nsms_to_add = max(1, min_internal_nsms - len(nsm_loads))
else:
# For externally managed clusters we only claim the specified clusters, if none provided, we just log it
nsms_to_add = len(external_nsm_cluster_names)
if nsms_to_add == 0:
cls._logger.critical(
'ALBA Backend {0} - All NSM clusters are overloaded'.
format(alba_backend.name))
return
# Deploy new (internal) or claim existing (external) NSM clusters
cls._logger.debug(
'ALBA Backend {0} - Currently {1} NSM cluster{2}'.format(
alba_backend.name, len(nsm_loads),
'' if len(nsm_loads) == 1 else 's'))
AlbaArakoonController._logger.debug(
'ALBA Backend {0} - Trying to add {1} NSM cluster{2}'.format(
alba_backend.name, nsms_to_add,
'' if nsms_to_add == 1 else 's'))
base_number = max(nsm_loads.keys()) + 1
for index, number in enumerate(
xrange(base_number, base_number + nsms_to_add)):
if not internal:
# External clusters
master_client = None
if not ssh_clients:
for storagerouter in StorageRouterList.get_masters():
try:
master_client = SSHClient(storagerouter)
except UnableToConnectException:
cls._logger.warning(
'StorageRouter {0} with IP {1} is not reachable'
.format(storagerouter.name, storagerouter.ip))
else:
for storagerouter, ssh_client in ssh_clients.iteritems():
if storagerouter.node_type == 'MASTER':
master_client = ssh_client
if not master_client:
raise ValueError('Could not find an online master node')
# @todo this might raise an indexerror?
nsm_cluster_name = external_nsm_cluster_names[index]
cls._logger.debug(
'ALBA Backend {0} - Claiming NSM cluster {1}'.format(
alba_backend.name, nsm_cluster_name))
metadata = ArakoonInstaller.get_unused_arakoon_metadata_and_claim(
cluster_type=ServiceType.ARAKOON_CLUSTER_TYPES.NSM,
cluster_name=nsm_cluster_name)
if metadata is None:
cls._logger.critical(
'ALBA Backend {0} - NSM cluster with name {1} could not be found'
.format(alba_backend.name, nsm_cluster_name))
continue
cls._logger.debug(
'ALBA Backend {0} - Modeling services'.format(
alba_backend.name))
AlbaArakoonInstaller.model_arakoon_service(
alba_backend=alba_backend,
cluster_name=nsm_cluster_name,
number=number)
cls._logger.debug('ALBA Backend {0} - Registering NSM'.format(
alba_backend.name))
NSMInstaller.register_nsm(abm_name=abm_cluster_name,
nsm_name=nsm_cluster_name,
ip=master_client.ip)
AlbaArakoonController._logger.debug(
'ALBA Backend {0} - Extended cluster'.format(
alba_backend.name))
else:
# Internal clusters
nsm_cluster_name = '{0}-nsm_{1}'.format(
alba_backend.name, number)
cls._logger.debug(
'ALBA Backend {0} - Adding NSM cluster {1}'.format(
alba_backend.name, nsm_cluster_name))
# One of the NSM nodes is overloaded. This means the complete NSM is considered overloaded
# Figure out which StorageRouters are the least occupied
loads = sorted(nsms_per_storagerouter.values())[:safety]
storagerouters = []
for storagerouter, load in nsms_per_storagerouter.iteritems():
if load in loads:
storagerouters.append(storagerouter)
if len(storagerouters) == safety:
break
# Creating a new NSM cluster
for sub_index, storagerouter in enumerate(storagerouters):
nsms_per_storagerouter[storagerouter] += 1
partition = AlbaArakoonInstaller.get_db_partition(
storagerouter)
arakoon_installer = ArakoonInstaller(
cluster_name=nsm_cluster_name)
# @todo Use deploy and extend code. (Disable register nsm in those parts)
if sub_index == 0:
arakoon_installer.create_cluster(
cluster_type=ServiceType.ARAKOON_CLUSTER_TYPES.NSM,
ip=storagerouter.ip,
base_dir=partition.folder,
plugins={NSM_PLUGIN: version_str})
else:
cls._logger.debug(
'ALBA Backend {0} - Extending NSM cluster {1}'.
format(alba_backend.name, nsm_cluster_name))
arakoon_installer.load()
arakoon_installer.extend_cluster(
new_ip=storagerouter.ip,
base_dir=partition.folder,
plugins={NSM_PLUGIN: version_str})
cls._logger.debug(
'ALBA Backend {0} - Linking plugins'.format(
alba_backend.name))
ssh_client = ssh_clients.get(storagerouter) or SSHClient(
StorageRouter)
AlbaArakoonInstaller.link_plugins(
client=ssh_client,
data_dir=partition.folder,
plugins=[NSM_PLUGIN],
cluster_name=nsm_cluster_name)
cls._logger.debug(
'ALBA Backend {0} - Modeling services'.format(
alba_backend.name))
AlbaArakoonInstaller.model_arakoon_service(
alba_backend=alba_backend,
cluster_name=nsm_cluster_name,
ports=arakoon_installer.ports[storagerouter.ip],
storagerouter=storagerouter,
number=number)
if sub_index == 0:
cls._logger.debug(
'ALBA Backend {0} - Starting cluster'.format(
alba_backend.name))
arakoon_installer.start_cluster()
else:
AlbaArakoonController._logger.debug(
'ALBA Backend {0} - Restarting cluster'.format(
alba_backend.name))
arakoon_installer.restart_cluster_after_extending(
new_ip=storagerouter.ip)
cls._logger.debug('ALBA Backend {0} - Registering NSM'.format(
alba_backend.name))
NSMInstaller.register_nsm(abm_name=abm_cluster_name,
nsm_name=nsm_cluster_name,
ip=storagerouters[0].ip)
cls._logger.debug(
'ALBA Backend {0} - Added NSM cluster {1}'.format(
alba_backend.name, nsm_cluster_name))