#!/usr/bin/env python3 # # Copyright 2016 Canonical Ltd # # 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 base64 import json import platform import sys import uuid import os import subprocess import grp import shutil import charmhelpers.core.unitdata as unitdata from charmhelpers.core.hookenv import ( Hooks, config, is_relation_made, local_unit, log, DEBUG, INFO, relation_ids, remote_service_name, related_units, relation_get, relation_set, service_name, UnregisteredHookError, status_set, ) from charmhelpers.core.templating import ( render ) from charmhelpers.core.host import ( service_restart, service_running, service_start, service_stop, write_file, umount, is_container, ) from charmhelpers.fetch import ( add_source, apt_install, apt_purge, apt_update, filter_installed_packages, ) import charmhelpers.contrib.openstack.context as ch_context from charmhelpers.contrib.openstack.utils import ( CompareOpenStackReleases, configure_installation_source, is_unit_paused_set, get_source_and_pgp_key, openstack_upgrade_available, os_release, pausable_restart_on_change as restart_on_change, series_upgrade_complete, series_upgrade_prepare, ) from charmhelpers.contrib.storage.linux.ceph import ( ensure_ceph_keyring, CephBrokerRq, CephBrokerRsp, delete_keyring, is_broker_action_done, mark_broker_action_done, get_broker_rsp_key, get_request_states, get_previous_request, send_application_name, ) from charmhelpers.payload.execd import execd_preinstall from nova_compute_utils import ( create_libvirt_secret, determine_packages, import_authorized_keys, import_keystone_ca_cert, initialize_ssh_keys, migration_enabled, do_openstack_upgrade, public_ssh_key, restart_map, services, register_configs, NOVA_CONF, ceph_config_file, CEPH_SECRET, CEPH_BACKEND_SECRET, enable_shell, disable_shell, configure_lxd, fix_path_ownership, assert_charm_supports_ipv6, install_hugepages, get_hugepage_number, assess_status, set_ppc64_cpu_smt_state, remove_libvirt_network, network_manager, libvirt_daemon, LIBVIRT_TYPES, configure_local_ephemeral_storage, pause_unit_helper, resume_unit_helper, get_availability_zone, remove_old_packages, MULTIPATH_PACKAGES, USE_FQDN_KEY, ) from charmhelpers.contrib.network.ip import ( get_relation_ip, ) from charmhelpers.core.unitdata import kv from nova_compute_context import ( nova_metadata_requirement, CEPH_SECRET_UUID, assert_libvirt_rbd_imagebackend_allowed, NovaAPIAppArmorContext, NovaComputeAppArmorContext, NovaNetworkAppArmorContext, ) from charmhelpers.contrib.charmsupport import nrpe from charmhelpers.core.sysctl import create as create_sysctl from charmhelpers.contrib.hardening.harden import harden from socket import gethostname import charmhelpers.contrib.openstack.vaultlocker as vaultlocker hooks = Hooks() CONFIGS = register_configs() MIGRATION_AUTH_TYPES = ["ssh"] LIBVIRTD_PID = '/var/run/libvirtd.pid' @hooks.hook('install.real') @harden() def install(): status_set('maintenance', 'Executing pre-install') execd_preinstall() configure_installation_source(config('openstack-origin')) configure_extra_repositories(config('extra-repositories')) status_set('maintenance', 'Installing apt packages') apt_update() apt_install(determine_packages(), fatal=True) # Start migration to agent registration with FQDNs for newly installed # units with OpenStack release Stein or newer. release = os_release('nova-common') if CompareOpenStackReleases(release) >= 'stein': db = kv() db.set(USE_FQDN_KEY, True) db.flush() install_vaultlocker() def configure_extra_repositories(extra_repositories): """Configures extra repositories to be added to the deployment. Evaluates the config option 'extra-repositories' and configures the additional installation sources as appropriate. :param extra_repositories: extra repositories to install :type extra_repositories: str :raises: SourceConfigError if there is an error with the extra repositories """ if not extra_repositories: log('No additional repositories to configure.', level=DEBUG) return for repo in extra_repositories.split(','): if not repo: continue repo = repo.strip() log('Configuring additional repository: "{}"'.format(repo), level=DEBUG) source, key = get_source_and_pgp_key(repo) # Note: the add_source should fail and will result in the hook failing # which is better to correct at this point if there is a # configuration error rather than believing the repository to be # configured. add_source(source, key, fail_invalid=True) @hooks.hook('config-changed') @restart_on_change(restart_map()) @harden() def config_changed(): if is_unit_paused_set(): log("Do not run config_changed when paused", "WARNING") return if config('ephemeral-unmount'): umount(config('ephemeral-unmount'), persist=True) if config('prefer-ipv6'): status_set('maintenance', 'configuring ipv6') assert_charm_supports_ipv6() if config('extra-repositories'): log('Configuring extra repositories', level=INFO) configure_extra_repositories(config('extra-repositories')) apt_update() if (migration_enabled() and config('migration-auth-type') not in MIGRATION_AUTH_TYPES): message = ("Invalid migration-auth-type") status_set('blocked', message) raise Exception(message) global CONFIGS send_remote_restart = False if not config('action-managed-upgrade'): if openstack_upgrade_available('nova-common'): status_set('maintenance', 'Running openstack upgrade') do_openstack_upgrade(CONFIGS) send_remote_restart = True sysctl_settings = config('sysctl') if sysctl_settings and not is_container(): create_sysctl( sysctl_settings, '/etc/sysctl.d/50-nova-compute.conf', # Some keys in the config may not exist in /proc/sys/net/. # For example, the conntrack module may not be loaded when # using lxd drivers insteam of kvm. In these cases, we # simply ignore the missing keys, rather than making time # consuming calls out to the filesystem to check for their # existence. ignore=True) remove_libvirt_network('default') if migration_enabled() and config('migration-auth-type') == 'ssh': # Check-in with nova-c-c and register new ssh key, if it has just been # generated. status_set('maintenance', 'SSH key exchange') initialize_ssh_keys() import_authorized_keys() if config('enable-resize') is True: enable_shell(user='nova') status_set('maintenance', 'SSH key exchange') initialize_ssh_keys(user='nova') import_authorized_keys(user='nova', prefix='nova') else: disable_shell(user='nova') if config('instances-path') is not None: fp = config('instances-path') fix_path_ownership(fp, user='nova') for rid in relation_ids('cloud-compute'): compute_joined(rid) for rid in relation_ids('neutron-plugin'): neutron_plugin_joined(rid, remote_restart=send_remote_restart) for rid in relation_ids('nova-ceilometer'): nova_ceilometer_joined(rid, remote_restart=send_remote_restart) if is_relation_made("nrpe-external-master"): update_nrpe_config() if config('hugepages'): install_hugepages() # Disable smt for ppc64, required for nova/libvirt/kvm arch = platform.machine() log('CPU architecture: {}'.format(arch)) if arch in ['ppc64el', 'ppc64le']: set_ppc64_cpu_smt_state('off') # NOTE(jamespage): trigger any configuration related changes # for cephx permissions restrictions and # keys on disk for ceph-access backends for rid in relation_ids('ceph'): for unit in related_units(rid): ceph_changed(rid=rid, unit=unit) for rid in relation_ids('ceph-access'): for unit in related_units(rid): ceph_access(rid=rid, unit=unit) CONFIGS.write_all() NovaComputeAppArmorContext().setup_aa_profile() if (network_manager() in ['flatmanager', 'flatdhcpmanager'] and config('multi-host').lower() == 'yes'): NovaAPIAppArmorContext().setup_aa_profile() NovaNetworkAppArmorContext().setup_aa_profile() install_vaultlocker() install_multipath() configure_local_ephemeral_storage() check_and_start_iscsid() def install_vaultlocker(): """Determine whether vaultlocker is required and install""" if config('encrypt'): installed = len(filter_installed_packages(['vaultlocker'])) == 0 if not installed: apt_install('vaultlocker', fatal=True) def install_multipath(): if config('use-multipath'): installed = len(filter_installed_packages(MULTIPATH_PACKAGES)) == 0 if not installed: apt_install(MULTIPATH_PACKAGES, fatal=True) @hooks.hook('amqp-relation-joined') def amqp_joined(relation_id=None): relation_set(relation_id=relation_id, username=config('rabbit-user'), vhost=config('rabbit-vhost')) @hooks.hook('amqp-relation-changed') @hooks.hook('amqp-relation-departed') @restart_on_change(restart_map()) def amqp_changed(): if 'amqp' not in CONFIGS.complete_contexts(): log('amqp relation incomplete. Peer not ready?') return CONFIGS.write(NOVA_CONF) @hooks.hook('image-service-relation-changed') @restart_on_change(restart_map()) def image_service_changed(): if 'image-service' not in CONFIGS.complete_contexts(): log('image-service relation incomplete. Peer not ready?') return CONFIGS.write(NOVA_CONF) @hooks.hook('ephemeral-backend-relation-changed', 'ephemeral-backend-relation-broken') @restart_on_change(restart_map()) def ephemeral_backend_hook(): if 'ephemeral-backend' not in CONFIGS.complete_contexts(): log('ephemeral-backend relation incomplete. Peer not ready?') return CONFIGS.write(NOVA_CONF) @hooks.hook('cloud-compute-relation-joined') def compute_joined(rid=None): # NOTE(james-page) in MAAS environments the actual hostname is a CNAME # record so won't get scanned based on private-address which is an IP # add the hostname configured locally to the relation. settings = { 'hostname': gethostname(), 'private-address': get_relation_ip( 'migration', cidr_network=config('libvirt-migration-network')), } az = get_availability_zone() if az: relation_set(relation_id=rid, availability_zone=az) if migration_enabled(): auth_type = config('migration-auth-type') settings['migration_auth_type'] = auth_type if auth_type == 'ssh': settings['ssh_public_key'] = public_ssh_key() relation_set(relation_id=rid, **settings) if config('enable-resize'): settings['nova_ssh_public_key'] = public_ssh_key(user='nova') relation_set(relation_id=rid, **settings) @hooks.hook('cloud-compute-relation-changed') @restart_on_change(restart_map()) def compute_changed(): # rewriting all configs to pick up possible net or vol manager # config advertised from controller. CONFIGS.write_all() import_authorized_keys() import_authorized_keys(user='nova', prefix='nova') import_keystone_ca_cert() @hooks.hook('ironic-api-relation-changed') @restart_on_change(restart_map()) def ironic_api_changed(): CONFIGS.write(NOVA_CONF) @hooks.hook('ceph-access-relation-joined') @hooks.hook('ceph-relation-joined') @restart_on_change(restart_map()) def ceph_joined(): pkgs = filter_installed_packages(['ceph-common']) if pkgs: status_set('maintenance', 'Installing ceph-common package') apt_install(pkgs, fatal=True) # Bug 1427660 if not is_unit_paused_set() and config('virt-type') in LIBVIRT_TYPES: service_restart(libvirt_daemon()) send_application_name() def get_ceph_request(): rq = CephBrokerRq() if (config('libvirt-image-backend') == 'rbd' and assert_libvirt_rbd_imagebackend_allowed()): pool_name = config('rbd-pool') replicas = config('ceph-osd-replication-count') weight = config('ceph-pool-weight') bluestore_compression = ch_context.CephBlueStoreCompressionContext() if config('pool-type') == 'erasure-coded': # General EC plugin config plugin = config('ec-profile-plugin') technique = config('ec-profile-technique') device_class = config('ec-profile-device-class') metadata_pool_name = ( config('ec-rbd-metadata-pool') or "{}-metadata".format(pool_name) ) bdm_k = config('ec-profile-k') bdm_m = config('ec-profile-m') # LRC plugin config bdm_l = config('ec-profile-locality') crush_locality = config('ec-profile-crush-locality') # SHEC plugin config bdm_c = config('ec-profile-durability-estimator') # CLAY plugin config bdm_d = config('ec-profile-helper-chunks') scalar_mds = config('ec-profile-scalar-mds') # Profile name profile_name = ( config('ec-profile-name') or "{}-profile".format(pool_name) ) # Metadata sizing is approximately 1% of overall data weight # but is in effect driven by the number of rbd's rather than # their size - so it can be very lightweight. metadata_weight = weight * 0.01 # Resize data pool weight to accomodate metadata weight weight = weight - metadata_weight # Create metadata pool rq.add_op_create_pool( name=metadata_pool_name, replica_count=replicas, weight=metadata_weight, group='vms', app_name='rbd' ) # Create erasure profile rq.add_op_create_erasure_profile( name=profile_name, k=bdm_k, m=bdm_m, lrc_locality=bdm_l, lrc_crush_locality=crush_locality, shec_durability_estimator=bdm_c, clay_helper_chunks=bdm_d, clay_scalar_mds=scalar_mds, device_class=device_class, erasure_type=plugin, erasure_technique=technique ) # Create EC data pool # NOTE(fnordahl): once we deprecate Python 3.5 support we can do # the unpacking of the BlueStore compression arguments as part of # the function arguments. Until then we need to build the dict # prior to the function call. kwargs = { 'name': pool_name, 'erasure_profile': profile_name, 'weight': weight, 'group': "vms", 'app_name': "rbd", 'allow_ec_overwrites': True } kwargs.update(bluestore_compression.get_kwargs()) rq.add_op_create_erasure_pool(**kwargs) else: kwargs = { 'name': pool_name, 'replica_count': replicas, 'weight': weight, 'group': 'vms', 'app_name': 'rbd', } kwargs.update(bluestore_compression.get_kwargs()) rq.add_op_create_replicated_pool(**kwargs) if config('restrict-ceph-pools'): rq.add_op_request_access_to_group( name="volumes", object_prefix_permissions={'class-read': ['rbd_children']}, permission='rwx') rq.add_op_request_access_to_group( name="images", object_prefix_permissions={'class-read': ['rbd_children']}, permission='rwx') rq.add_op_request_access_to_group( name="vms", object_prefix_permissions={'class-read': ['rbd_children']}, permission='rwx') return rq @hooks.hook('ceph-relation-changed') @restart_on_change(restart_map()) def ceph_changed(rid=None, unit=None): if 'ceph' not in CONFIGS.complete_contexts(): log('ceph relation incomplete. Peer not ready?') return if not ensure_ceph_keyring(service=service_name(), user='nova', group='nova'): log('Could not create ceph keyring: peer not ready?') return CONFIGS.write(ceph_config_file()) CONFIGS.write(CEPH_SECRET) CONFIGS.write(NOVA_CONF) # With some refactoring, this can move into NovaComputeCephContext # and allow easily extended to support other compute flavors. key = relation_get(attribute='key', rid=rid, unit=unit) if config('virt-type') in ['kvm', 'qemu', 'lxc'] and key: create_libvirt_secret(secret_file=CEPH_SECRET, secret_uuid=CEPH_SECRET_UUID, key=key) try: _handle_ceph_request() except ValueError as e: # The end user has most likely provided a invalid value for a # configuration option. Just log the traceback here, the end # user will be notified by assess_status() called at the end of # the hook execution. log('Caught ValueError, invalid value provided for ' 'configuration?: "{}"'.format(str(e)), level=DEBUG) # TODO: Refactor this method moving part of this logic to charmhelpers, # refacting the existing ones. def _handle_ceph_request(): """Handles the logic for sending and acknowledging Ceph broker requests.""" # First, we create a request. We will test if this request is equivalent # to a previous one. If it is not, we will send it. request = get_ceph_request() log("New ceph request {} created.".format(request.request_id), level=DEBUG) # Here we will know if the new request is equivalent, and if it is, whether # it has completed, or just sent. states = get_request_states(request, relation='ceph') log("Request states: {}.".format(states), level=DEBUG) complete = True sent = True # According to existing ceph broker messaging logic, we are expecting only # 1 rid. for rid in states.keys(): if not states[rid]['complete']: complete = False if not states[rid]['sent']: sent = False if not sent and not complete: break # If either complete or sent is True, then get_request_states has validated # that the current request is equivalent to a previously sent request. if complete: log('Previous request complete.') # If the request is complete, we need to restart nova once and mark it # restarted. The broker response comes from a specific unit, and can # only be read when this hook is invoked by the remote unit (the # broker), unless specifically queried for the given unit. Therefore, # we iterate across all units to find which has the broker response, # and we process the response regardless of this execution context. broker_rid, broker_unit = _get_broker_rid_unit_for_previous_request() # If we cannot determine which unit has the response, then it means # there is no response yet. if (broker_rid, broker_unit) == (None, None): log("Aborting because there is no broker response " "for any unit at the moment.", level=DEBUG) return # Ensure that nova-compute is restarted since only now can we # guarantee that ceph resources are ready, but only if not paused. if (not is_unit_paused_set() and not is_broker_action_done('nova_compute_restart', broker_rid, broker_unit)): log('Restarting Nova Compute as per request ' '{}.'.format(request.request_id), level=DEBUG) service_restart('nova-compute') mark_broker_action_done('nova_compute_restart', broker_rid, broker_unit) else: if sent: log("Request {} already sent, not sending " "another.".format(request.request_id), level=DEBUG) else: log("Request {} not sent, sending it " "now.".format(request.request_id), level=DEBUG) for rid in relation_ids('ceph'): log('Sending request {}'.format(request.request_id), level=DEBUG) relation_set(relation_id=rid, broker_req=request.request) # TODO: Move this method to charmhelpers while refactoring the existing ones def _get_broker_rid_unit_for_previous_request(): """Gets the broker rid and unit combination that has a response for the previous sent request.""" broker_key = get_broker_rsp_key() log("Broker key is {}.".format(broker_key), level=DEBUG) for rid in relation_ids('ceph'): previous_request = get_previous_request(rid) for unit in related_units(rid): rdata = relation_get(rid=rid, unit=unit) if rdata.get(broker_key): rsp = CephBrokerRsp(rdata.get(broker_key)) if rsp.request_id == previous_request.request_id: log("Found broker rid/unit: {}/{}".format(rid, unit), level=DEBUG) return rid, unit log("There is no broker response for any unit at the moment.", level=DEBUG) return None, None @hooks.hook('ceph-relation-broken') def ceph_broken(): service = service_name() delete_keyring(service=service) CONFIGS.write_all() @hooks.hook('amqp-relation-broken', 'image-service-relation-broken') @restart_on_change(restart_map()) def relation_broken(): CONFIGS.write_all() @hooks.hook('upgrade-charm.real') @harden() def upgrade_charm(): apt_install(filter_installed_packages(determine_packages()), fatal=True) # NOTE: ensure psutil install for hugepages configuration status_set('maintenance', 'Installing apt packages') apt_install(filter_installed_packages(['python-psutil'])) packages_removed = remove_old_packages() if packages_removed and not is_unit_paused_set(): log("Package purge detected, restarting services", "INFO") for s in services(): service_restart(s) for r_id in relation_ids('amqp'): amqp_joined(relation_id=r_id) if is_relation_made('nrpe-external-master'): update_nrpe_config() # Fix previously wrongly created path permissions # LP: https://bugs.launchpad.net/charm-cinder-ceph/+bug/1779676 asok_path = '/var/run/ceph/' gid = grp.getgrnam("kvm").gr_gid if gid and os.path.isdir(asok_path) and gid != os.stat(asok_path).st_gid: log("{} not owned by group 'kvm', fixing permissions." .format(asok_path)) shutil.chown(asok_path, group='kvm') @hooks.hook('nova-ceilometer-relation-joined') def nova_ceilometer_joined(relid=None, remote_restart=False): if remote_restart: rel_settings = { 'restart-trigger': str(uuid.uuid4())} relation_set(relation_id=relid, relation_settings=rel_settings) @hooks.hook('nova-ceilometer-relation-changed') @restart_on_change(restart_map()) def nova_ceilometer_relation_changed(): CONFIGS.write_all() @hooks.hook('nrpe-external-master-relation-joined', 'nrpe-external-master-relation-changed') def update_nrpe_config(): # python-dbus is used by check_upstart_job apt_install('python-dbus') hostname = nrpe.get_nagios_hostname() current_unit = nrpe.get_nagios_unit_name() nrpe_setup = nrpe.NRPE(hostname=hostname) monitored_services = services() try: # qemu-kvm is a one-shot service monitored_services.remove('qemu-kvm') except ValueError: pass nrpe.add_init_service_checks(nrpe_setup, monitored_services, current_unit) nrpe_setup.write() @hooks.hook('neutron-plugin-relation-joined') def neutron_plugin_joined(relid=None, remote_restart=False): rel_settings = { 'hugepage_number': get_hugepage_number(), 'default_availability_zone': get_availability_zone() } if remote_restart: rel_settings['restart-trigger'] = str(uuid.uuid4()) relation_set(relation_id=relid, **rel_settings) @hooks.hook('neutron-plugin-relation-changed') @restart_on_change(restart_map()) def neutron_plugin_changed(): enable_nova_metadata, _ = nova_metadata_requirement() if enable_nova_metadata: apt_update() apt_install(filter_installed_packages(['nova-api-metadata']), fatal=True) else: apt_purge('nova-api-metadata', fatal=True) service_restart_handler(default_service='nova-compute') CONFIGS.write(NOVA_CONF) # TODO(jamespage): Move this into charmhelpers for general reuse. def service_restart_handler(relation_id=None, unit=None, default_service=None): '''Handler for detecting requests from subordinate charms for restarts of services''' restart_nonce = relation_get(attribute='restart-nonce', unit=unit, rid=relation_id) db = unitdata.kv() nonce_key = 'restart-nonce' if restart_nonce != db.get(nonce_key): if not is_unit_paused_set(): service = relation_get(attribute='remote-service', unit=unit, rid=relation_id) or default_service if service: service_restart(service) db.set(nonce_key, restart_nonce) db.flush() @hooks.hook('lxd-relation-joined') def lxd_joined(relid=None): relation_set(relation_id=relid, user='nova') @hooks.hook('lxd-relation-changed') @restart_on_change(restart_map()) def lxc_changed(): nonce = relation_get('nonce') db = kv() if nonce and db.get('lxd-nonce') != nonce: db.set('lxd-nonce', nonce) configure_lxd(user='nova') CONFIGS.write(NOVA_CONF) @hooks.hook('ceph-access-relation-changed') def ceph_access(rid=None, unit=None): '''Setup libvirt secret for specific ceph backend access''' def _configure_keyring(service_name, key, uuid): if config('virt-type') in LIBVIRT_TYPES: secrets_filename = CEPH_BACKEND_SECRET.format(service_name) render(os.path.basename(CEPH_SECRET), secrets_filename, context={'ceph_secret_uuid': uuid, 'service_name': service_name}) create_libvirt_secret(secret_file=secrets_filename, secret_uuid=uuid, key=key) # NOTE(jamespage): LXD ceph integration via host rbd mapping, so # install keyring for rbd commands to use ensure_ceph_keyring(service=service_name, user='nova', group='nova', key=key) ceph_keyrings = relation_get('keyrings') if ceph_keyrings: for keyring in json.loads(ceph_keyrings): _configure_keyring( keyring['name'], keyring['key'], keyring['secret-uuid']) else: # NOTE: keep backwards compatibility with previous relation data key = relation_get('key', unit, rid) uuid = relation_get('secret-uuid', unit, rid) if key and uuid: _configure_keyring(remote_service_name(rid), key, uuid) @hooks.hook('secrets-storage-relation-joined') def secrets_storage_joined(relation_id=None): relation_set(relation_id=relation_id, secret_backend=vaultlocker.VAULTLOCKER_BACKEND, isolated=True, access_address=get_relation_ip('secrets-storage'), hostname=gethostname()) @hooks.hook('secrets-storage-relation-changed') def secrets_storage_changed(): vault_ca = relation_get('vault_ca') if vault_ca: vault_ca = base64.decodebytes(json.loads(vault_ca).encode()) write_file('/usr/local/share/ca-certificates/vault-ca.crt', vault_ca, perms=0o644) subprocess.check_call(['update-ca-certificates', '--fresh']) configure_local_ephemeral_storage() @hooks.hook('storage.real') def storage_changed(): configure_local_ephemeral_storage() @hooks.hook('cloud-credentials-relation-joined') def cloud_credentials_joined(): svc_name = local_unit().split('/')[0].replace('-', '_') relation_set(username=svc_name) @hooks.hook('cloud-credentials-relation-changed') @restart_on_change(restart_map()) def cloud_credentials_changed(): CONFIGS.write(NOVA_CONF) def check_and_start_iscsid(): if not service_running('iscsid'): service_start('iscsid') @hooks.hook('update-status') @harden() def update_status(): log('Updating status.') @hooks.hook('pre-series-upgrade') def pre_series_upgrade(): log("Running prepare series upgrade hook", "INFO") series_upgrade_prepare( pause_unit_helper, CONFIGS) @hooks.hook('post-series-upgrade') def post_series_upgrade(): log("Running complete series upgrade hook", "INFO") service_stop('nova-compute') service_stop(libvirt_daemon()) # After package upgrade the service is broken and leaves behind a # PID file which causes the service to fail to start. # Remove this before restart if os.path.exists(LIBVIRTD_PID): os.unlink(LIBVIRTD_PID) series_upgrade_complete( resume_unit_helper, CONFIGS) @hooks.hook('shared-db-relation-joined') def shared_db_relation_joined(): release = os_release('nova-common') if CompareOpenStackReleases(release) >= 'ussuri': log("shared-db is only required for nova-network which is NOT " "available in Ussuri and later. Please remove the relation.", "WARNING") def main(): try: hooks.execute(sys.argv) except UnregisteredHookError as e: log('Unknown hook {} - skipping.'.format(e)) assess_status(CONFIGS) if __name__ == '__main__': main()