/
nova_cc_utils.py
1947 lines (1643 loc) · 69.9 KB
/
nova_cc_utils.py
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# 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 collections
import configparser
import copy
import os
import subprocess
from urllib.parse import urlparse
import uuid
import charmhelpers.contrib.hahelpers.cluster as ch_cluster
import charmhelpers.contrib.network.ip as ch_ip
import charmhelpers.contrib.openstack.context as ch_context
import charmhelpers.contrib.openstack.ip as ch_openstack_ip
import charmhelpers.contrib.openstack.templating as ch_templating
import charmhelpers.contrib.openstack.utils as ch_utils
import charmhelpers.contrib.peerstorage as ch_peerstorage
import charmhelpers.core.decorators as ch_decorators
import charmhelpers.core.hookenv as hookenv
import charmhelpers.core.host as ch_host
import charmhelpers.core.unitdata as unitdata
import charmhelpers.fetch as ch_fetch
import hooks.nova_cc_common as common
import hooks.nova_cc_context as nova_cc_context
TEMPLATES = 'templates/'
CLUSTER_RES = 'grp_nova_vips'
SHARED_METADATA_SECRET_KEY = 'shared-metadata-secret'
# The interface is said to be satisfied if anyone of the interfaces in the
# list has a complete context.
REQUIRED_INTERFACES = {
'database': ['shared-db'],
'messaging': ['amqp'],
'identity': ['identity-service'],
'image': ['image-service'],
'compute': ['nova-compute', 'nova-cell-api'],
}
# removed from original: charm-helper-sh
BASE_PACKAGES = [
'apache2',
'haproxy',
'libapache2-mod-wsgi',
'python-keystoneclient',
'python-mysqldb',
'python-psycopg2',
'python-psutil',
'python-memcache',
'uuid',
]
PY3_PACKAGES = [
'libapache2-mod-wsgi-py3',
'python3-nova',
'python3-keystoneclient',
'python3-psutil',
'python3-six',
'python3-memcache',
]
VERSION_PACKAGE = 'nova-common'
BASE_SERVICES = [
'nova-api-ec2',
'nova-api-os-compute',
'nova-placement-api',
'nova-objectstore',
'nova-cert',
'nova-scheduler',
'nova-conductor',
]
AWS_COMPAT_SERVICES = ['nova-api-ec2', 'nova-objectstore']
SERVICE_BLACKLIST = {
'liberty': AWS_COMPAT_SERVICES,
'newton': ['nova-cert'],
}
# API_PORTS is now in nova_cc_common.py to break the circular dependency
# between nova_cc_utils.py and nova_cc_context.py
NOVA_CONF_DIR = "/etc/nova"
NEUTRON_CONF_DIR = "/etc/neutron"
NOVA_CONF = '%s/nova.conf' % NOVA_CONF_DIR
NOVA_API_PASTE = '%s/api-paste.ini' % NOVA_CONF_DIR
VENDORDATA_FILE = '%s/vendor_data.json' % NOVA_CONF_DIR
HAPROXY_CONF = '/etc/haproxy/haproxy.cfg'
APACHE_CONF = '/etc/apache2/sites-available/openstack_https_frontend'
APACHE_24_CONF = '/etc/apache2/sites-available/openstack_https_frontend.conf'
APACHE_SSL_DIR = '/etc/apache2/ssl/nova'
MEMCACHED_CONF = '/etc/memcached.conf'
WSGI_NOVA_PLACEMENT_API_CONF = \
'/etc/apache2/sites-enabled/wsgi-placement-api.conf'
PACKAGE_NOVA_PLACEMENT_API_CONF = \
'/etc/apache2/sites-enabled/nova-placement-api.conf'
OLD_WSGI_NOVA_PLACEMENT_API_CONF = \
'/etc/apache2/sites-enabled/wsgi-openstack-api.conf'
WSGI_NOVA_METADATA_API_CONF = \
'/etc/apache2/sites-enabled/wsgi-openstack-metadata.conf'
PACKAGE_NOVA_API_OS_COMPUTE_CONF = \
'/etc/apache2/sites-available/nova-api-os-compute.conf'
WSGI_NOVA_API_OS_COMPUTE_CONF = \
'/etc/apache2/sites-enabled/wsgi-api-os-compute.conf'
def resolve_services():
_services = copy.deepcopy(BASE_SERVICES)
os_rel = ch_utils.os_release('nova-common')
cmp_os_release = ch_utils.CompareOpenStackReleases(os_rel)
for release in SERVICE_BLACKLIST:
if cmp_os_release >= release or hookenv.config('disable-aws-compat'):
for service in SERVICE_BLACKLIST[release]:
_services.remove(service)
return _services
# _BASE_RESOURCE_MAP is a caching global that is set up by
# get_base_resource_map()
_BASE_RESOURCE_MAP = None
def get_base_resource_map():
"""Return the base resource map. Note that it is cached in the
_BASE_RESOURCE_MAP global.
:returns: The base resource map
:rtype: collections.OrderedDict
"""
global _BASE_RESOURCE_MAP
if _BASE_RESOURCE_MAP is None:
_BASE_RESOURCE_MAP = collections.OrderedDict([
(NOVA_CONF, {
'services': resolve_services(),
'contexts': [
ch_context.AMQPContext(ssl_dir=NOVA_CONF_DIR),
ch_context.SharedDBContext(
relation_prefix='nova',
ssl_dir=NOVA_CONF_DIR),
ch_context.OSConfigFlagContext(
charm_flag='nova-alchemy-flags',
template_flag='nova_alchemy_flags'),
ch_context.ImageServiceContext(),
ch_context.OSConfigFlagContext(),
ch_context.SubordinateConfigContext(
interface='nova-vmware',
service='nova',
config_file=NOVA_CONF),
ch_context.SyslogContext(),
ch_context.LogLevelContext(),
nova_cc_context.HAProxyContext(),
nova_cc_context.IdentityServiceContext(
service='nova',
service_user='nova'),
nova_cc_context.VolumeServiceContext(),
ch_context.ZeroMQContext(),
ch_context.NotificationDriverContext(),
nova_cc_context.NovaIPv6Context(),
nova_cc_context.NeutronCCContext(),
nova_cc_context.NovaConfigContext(),
nova_cc_context.RemoteMemcacheContext(),
nova_cc_context.InstanceConsoleContext(),
nova_cc_context.ConsoleSSLContext(),
nova_cc_context.CloudComputeContext(),
ch_context.InternalEndpointContext(),
ch_context.VolumeAPIContext('nova-common'),
nova_cc_context.NeutronAPIContext(),
nova_cc_context.SerialConsoleContext(),
ch_context.MemcacheContext(),
nova_cc_context.NovaMetadataContext('nova-common')],
}),
(NOVA_API_PASTE, {
'services': [s for s in resolve_services() if 'api' in s],
'contexts': [nova_cc_context.IdentityServiceContext(),
nova_cc_context.APIRateLimitingContext()],
}),
(VENDORDATA_FILE, {
'services': [],
'contexts': [nova_cc_context.NovaMetadataJSONContext(
'nova-common')],
}),
(HAPROXY_CONF, {
'contexts': [
ch_context.HAProxyContext(singlenode_mode=True),
nova_cc_context.HAProxyContext()],
'services': ['haproxy'],
}),
(APACHE_CONF, {
'contexts': [nova_cc_context.ApacheSSLContext(
determine_ports)],
'services': ['apache2'],
}),
(APACHE_24_CONF, {
'contexts': [nova_cc_context.ApacheSSLContext(
determine_ports)],
'services': ['apache2'],
}),
])
return _BASE_RESOURCE_MAP
CA_CERT_PATH = '/usr/local/share/ca-certificates/keystone_juju_ca_cert.crt'
NOVA_SSH_DIR = '/etc/nova/compute_ssh/'
SERIAL_CONSOLE = {
'packages': ['nova-serialproxy', 'nova-consoleauth',
'websockify'],
'services': ['nova-serialproxy', 'nova-consoleauth'],
}
def _replace_service_with_apache2(service, wsgi_script, wsgi_config,
resource_map, context):
for cfile in resource_map:
svcs = resource_map[cfile]['services']
if service in svcs:
svcs.remove(service)
if 'apache2' not in svcs:
svcs.append('apache2')
resource_map[wsgi_config] = {
'contexts': [
ch_context.WSGIWorkerConfigContext(
name=service,
script=wsgi_script,
user='nova',
group='nova'
),
context],
'services': ['apache2']}
def resource_map(actual_services=True):
'''
Dynamically generate a map of resources that will be managed for a single
hook execution.
:param actual_services: Whether to return the actual services that run on a
unit (ie. apache2) or the services defined in BASE_SERVICES
(ie.nova-placement-api).
'''
_resource_map = copy.deepcopy(get_base_resource_map())
if os.path.exists('/etc/apache2/conf-available'):
_resource_map.pop(APACHE_CONF)
else:
_resource_map.pop(APACHE_24_CONF)
_resource_map[NOVA_CONF]['contexts'].append(
nova_cc_context.NeutronCCContext())
release = ch_utils.os_release('nova-common')
cmp_os_release = ch_utils.CompareOpenStackReleases(release)
if cmp_os_release >= 'mitaka':
_resource_map[NOVA_CONF]['contexts'].append(
nova_cc_context.NovaAPISharedDBContext(relation_prefix='novaapi',
database='nova_api',
ssl_dir=NOVA_CONF_DIR)
)
if common.console_attributes('services'):
_resource_map[NOVA_CONF]['services'] += (
common.console_attributes('services'))
if is_serial_console_enabled(cmp_os_release):
_resource_map[NOVA_CONF]['services'] += SERIAL_CONSOLE['services']
# also manage any configs that are being updated by subordinates.
vmware_ctxt = ch_context.SubordinateConfigContext(
interface='nova-vmware', service='nova', config_file=NOVA_CONF)
vmware_ctxt = vmware_ctxt()
if vmware_ctxt and 'services' in vmware_ctxt:
for s in vmware_ctxt['services']:
if s not in _resource_map[NOVA_CONF]['services']:
_resource_map[NOVA_CONF]['services'].append(s)
if ch_utils.enable_memcache(release=release):
_resource_map[MEMCACHED_CONF] = {
'contexts': [ch_context.MemcacheContext()],
'services': ['memcached']}
if (actual_services and
ch_utils.CompareOpenStackReleases(release) >= 'rocky'):
# For Rocky we decided to switch from systemd to use apache2
# wsgi mod for the service nova-api-os-compute.
_replace_service_with_apache2(
'nova-api-os-compute',
'/usr/bin/nova-api-wsgi',
WSGI_NOVA_API_OS_COMPUTE_CONF,
_resource_map,
nova_cc_context.ComputeAPIHAProxyContext())
if actual_services and placement_api_enabled():
_replace_service_with_apache2(
'nova-placement-api',
'/usr/bin/nova-placement-api',
WSGI_NOVA_PLACEMENT_API_CONF,
_resource_map,
nova_cc_context.PlacementAPIHAProxyContext())
elif not placement_api_enabled():
for cfile in _resource_map:
svcs = _resource_map[cfile]['services']
if 'nova-placement-api' in svcs:
svcs.remove('nova-placement-api')
if enable_metadata_api():
if actual_services:
svcs = ['apache2']
else:
svcs = ['nova-api-metadata']
_resource_map[WSGI_NOVA_METADATA_API_CONF] = {
'contexts': [
ch_context.WSGIWorkerConfigContext(
name="nova_meta",
user='nova',
group='nova',
script='/usr/bin/nova-metadata-wsgi'),
nova_cc_context.MetaDataHAProxyContext(),
nova_cc_context.NeutronAPIContext()],
'services': svcs}
return _resource_map
def register_configs(release=None):
release = release or ch_utils.os_release('nova-common')
configs = ch_templating.OSConfigRenderer(
templates_dir=TEMPLATES, openstack_release=release)
for cfg, rscs in resource_map().items():
configs.register(cfg, rscs['contexts'])
return configs
def restart_map(actual_services=True):
'''
Constructs a restart map of config files and corresponding services
:param actual_services: Whether to return the actual services that run on a
unit (ie. apache2) or the services defined in BASE_SERVICES
(ie.nova-placement-api).
'''
services = resource_map(actual_services)
restart_map = collections.OrderedDict(
[(cfg, v['services'])
for cfg, v in services.items()
if v['services']])
if os.path.isdir(APACHE_SSL_DIR):
_restart_svcs = services[NOVA_CONF]['services'] + ['apache2']
restart_map['{}/*'.format(APACHE_SSL_DIR)] = _restart_svcs
return restart_map
def services():
''' Returns a list of services associate with this charm '''
_services = []
for v in restart_map().values():
_services = _services + v
return list(set(_services))
def determine_ports():
'''Assemble a list of API ports for services we are managing'''
ports = []
for services in restart_map(actual_services=False).values():
for svc in services:
try:
ports.append(common.api_port(svc))
except KeyError:
pass
return list(set(ports))
def determine_packages():
# currently all packages match service names
release = ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common'))
packages = copy.deepcopy(BASE_PACKAGES)
for v in resource_map(actual_services=False).values():
packages.extend(v['services'])
# The nova-api-metadata service is served via wsgi and the package is
# only needed for the standalone service so remove it to avoid port
# clashes.
try:
packages.remove("nova-api-metadata")
except ValueError:
pass
if common.console_attributes('packages'):
packages.extend(common.console_attributes('packages'))
if is_serial_console_enabled(release):
packages.extend(SERIAL_CONSOLE['packages'])
packages.extend(
ch_utils.token_cache_pkgs(source=hookenv.config('openstack-origin')))
if release >= 'rocky':
packages = [p for p in packages if not p.startswith('python-')]
packages.extend(PY3_PACKAGES)
packages.remove('libapache2-mod-wsgi')
if release >= 'stein':
# NOTE(jamespage):
# workaround to deal with lack of functionality to update the db
# connection for Cell 0. At stein, the default SQLAlchemy dialect
# switched to mysqldb, which requires use of mysql+pymysql:// in
# all connection strings, but there is no way to update the
# db url for cell0 as stored in the nova_api DB.
packages.append('python3-mysqldb')
return list(set(packages))
def determine_purge_packages():
'''
Determine list of packages that where previously installed which are no
longer needed.
:returns: list of package names
'''
release = ch_utils.CompareOpenStackReleases(
ch_utils.os_release('keystone'))
if release >= 'rocky':
pkgs = [p for p in BASE_PACKAGES if p.startswith('python-')]
pkgs.extend(['python-nova', 'python-memcache', 'libapache2-mod-wsgi'])
return pkgs
return []
def remove_old_packages():
'''Purge any packages that need ot be removed.
:returns: bool Whether packages were removed.
'''
installed_packages = ch_fetch.filter_missing_packages(
determine_purge_packages())
if installed_packages:
ch_fetch.apt_purge(installed_packages, fatal=True)
ch_fetch.apt_autoremove(purge=True, fatal=True)
return bool(installed_packages)
def save_script_rc():
env_vars = {
'OPENSTACK_PORT_MCASTPORT': hookenv.config('ha-mcastport'),
'OPENSTACK_SERVICE_API_EC2': 'nova-api-ec2',
'OPENSTACK_SERVICE_API_OS_COMPUTE': 'nova-api-os-compute',
'OPENSTACK_SERVICE_CERT': 'nova-cert',
'OPENSTACK_SERVICE_CONDUCTOR': 'nova-conductor',
'OPENSTACK_SERVICE_OBJECTSTORE': 'nova-objectstore',
'OPENSTACK_SERVICE_SCHEDULER': 'nova-scheduler',
}
if hookenv.relation_ids('nova-volume-service'):
env_vars['OPENSTACK_SERVICE_API_OS_VOL'] = 'nova-api-os-volume'
ch_utils.save_script_rc(**env_vars)
def get_step_upgrade_source(new_src):
'''
Determine if upgrade skips a release and, if so, return source
of skipped release.
'''
sources = {
# target_src: (cur_pocket, step_src)
# NOTE: cur_pocket == * means all upgrades to target_src must step
# through step_src if step_src is higher than
# current release
'precise-icehouse': ('precise-updates/grizzly',
'cloud:precise-havana'),
'precise-icehouse/proposed': ('precise-proposed/grizzly',
'cloud:precise-havana/proposed'),
'trusty-liberty': ('*', 'cloud:trusty-kilo'),
'xenial-ocata': ('*', 'cloud:xenial-newton'), # LP: #1711209
}
try:
os_codename = ch_utils.get_os_codename_install_source(new_src)
ubuntu_series = ch_host.lsb_release()['DISTRIB_CODENAME'].lower()
cur_pocket, step_src = sources['%s-%s' % (ubuntu_series, os_codename)]
current_src = ch_utils.os_release('nova-common')
step_src_codename = ch_utils.get_os_codename_install_source(step_src)
if cur_pocket == '*' and step_src_codename > current_src:
return step_src
except KeyError:
pass
ch_utils.configure_installation_source(new_src)
# charmhelpers.contrib.openstack.utils.configure_installation_source()
# configures the repository in juju_deb.list, while
# charmhelpers.fetch.add_sources() uses cloud-archive.list, so both
# files need to read looking for the currently configured repo.
for fname in ['cloud-archive.list', 'juju_deb.list']:
fpath = os.path.join('/etc/apt/sources.list.d/', fname)
if not os.path.isfile(fpath):
hookenv.log('Missing %s skipping it' % fpath, level=hookenv.DEBUG)
continue
with open(fpath, 'rt') as f:
for line in f.readlines():
for target_src, (cur_pocket, step_src) in sources.items():
if target_src != new_src:
continue
if cur_pocket in line:
return step_src
return None
POLICY_RC_D = """#!/bin/bash
set -e
case $1 in
nova-*)
[ $2 = "start" ] && exit 101
;;
*)
;;
esac
exit 0
"""
def enable_policy_rcd():
with open('/usr/sbin/policy-rc.d', 'w') as policy:
policy.write(POLICY_RC_D)
os.chmod('/usr/sbin/policy-rc.d', 0o755)
def disable_policy_rcd():
os.unlink('/usr/sbin/policy-rc.d')
def is_serial_console_enabled(cmp_os_release=None):
"""Determine whether serial console is enabled in this deploy
:param cmp_os_release: Release comparison object.
:type cmp_os_release: charmhelpers.contrib.openstack.utils.
CompareOpenStackReleases
:returns: Whether serial console is enabled in this deploy
:rtype: bool
"""
if not cmp_os_release:
release = ch_utils.os_release('nova-common')
cmp_os_release = ch_utils.CompareOpenStackReleases(release)
return hookenv.config('enable-serial-console') and cmp_os_release >= 'juno'
def is_console_auth_enabled():
"""Determine whether console auth is enabled in this deploy
:returns: Whether console auth is enabled in this deploy
:rtype: bool
"""
return bool(is_serial_console_enabled() or
hookenv.config('console-access-protocol'))
def is_db_initialised():
if hookenv.relation_ids('cluster'):
dbsync_state = ch_peerstorage.peer_retrieve('dbsync_state')
if dbsync_state == 'complete':
hookenv.log("Database is initialised", level=hookenv.DEBUG)
return True
hookenv.log("Database is NOT initialised", level=hookenv.DEBUG)
return False
def is_cellv2_init_ready():
"""Determine if we're ready to initialize the cell v2 databases
Cells v2 init requires transport_url and database connections to be set
in nova.conf.
"""
amqp = ch_context.AMQPContext()
shared_db = nova_cc_context.NovaCellV2SharedDBContext()
if (ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common')) >= 'ocata' and
amqp() and shared_db()):
return True
hookenv.log(
"OpenStack release, database, or rabbitmq not ready for Cells V2",
level=hookenv.DEBUG)
return False
def _do_openstack_upgrade(new_src):
enable_policy_rcd()
# All upgrades to Liberty are forced to step through Kilo. Liberty does
# not have the migrate_flavor_data option (Bug #1511466) available so it
# must be done pre-upgrade
if (ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common')) == 'kilo' and
hookenv.is_leader()):
migrate_nova_flavors()
# 'nova-manage db online_data_migrations' needs to be run before moving to
# the next release for environments upgraded using old charms where this
# step was not being executed (LP: #1711209).
online_data_migrations_if_needed()
new_os_rel = ch_utils.get_os_codename_install_source(new_src)
cmp_new_os_rel = ch_utils.CompareOpenStackReleases(new_os_rel)
hookenv.log('Performing OpenStack upgrade to %s.' % (new_os_rel))
ch_utils.configure_installation_source(new_src)
dpkg_opts = [
'--option', 'Dpkg::Options::=--force-confnew',
'--option', 'Dpkg::Options::=--force-confdef',
]
ch_fetch.apt_update(fatal=True)
ch_fetch.apt_upgrade(options=dpkg_opts, fatal=True, dist=True)
ch_utils.reset_os_release()
ch_fetch.apt_install(determine_packages(), fatal=True)
remove_old_packages()
disable_package_apache_site()
disable_policy_rcd()
stop_deprecated_services()
# NOTE(jamespage) upgrade with existing config files as the
# havana->icehouse migration enables new service_plugins which
# create issues with db upgrades
configs = register_configs(release=new_os_rel)
configs.write_all()
if cmp_new_os_rel >= 'mitaka' and not database_setup(prefix='novaapi'):
# NOTE: Defer service restarts and database migrations for now
# as nova_api database is not yet created
if (hookenv.relation_ids('cluster') and hookenv.is_leader()):
# NOTE: reset dbsync state so that migration will complete
# when the nova_api database is setup.
ch_peerstorage.peer_store('dbsync_state', None)
return configs
if cmp_new_os_rel >= 'ocata' and not database_setup(prefix='novacell0'):
# NOTE: Defer service restarts and database migrations for now
# as nova_cell0 database is not yet created
if (hookenv.relation_ids('cluster') and hookenv.is_leader()):
# NOTE: reset dbsync state so that migration will complete
# when the novacell0 database is setup.
ch_peerstorage.peer_store('dbsync_state', None)
return configs
if hookenv.is_leader():
hookenv.status_set('maintenance', 'Running nova db migration')
migrate_nova_databases()
if not ch_utils.is_unit_paused_set():
[ch_host.service_start(s) for s in services()]
return configs
def database_setup(prefix):
'''
Determine when a specific database is setup
and access is granted to the local unit.
This function only checks the MySQL shared-db
relation name using the provided prefix.
'''
key = '{}_allowed_units'.format(prefix)
for db_rid in hookenv.relation_ids('shared-db'):
for unit in hookenv.related_units(db_rid):
allowed_units = hookenv.relation_get(key, rid=db_rid, unit=unit)
if allowed_units and hookenv.local_unit() in allowed_units.split():
return True
return False
def do_openstack_upgrade(configs):
new_src = hookenv.config('openstack-origin')
step_src = get_step_upgrade_source(new_src)
if step_src is not None:
_do_openstack_upgrade(step_src)
return _do_openstack_upgrade(new_src)
@ch_decorators.retry_on_exception(
5, base_delay=3, exc_type=subprocess.CalledProcessError)
def migrate_nova_flavors():
'''Runs nova-manage to migrate flavor data if needed'''
hookenv.log('Migrating nova flavour information in database.',
level=hookenv.INFO)
cmd = ['nova-manage', 'db', 'migrate_flavor_data']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
hookenv.log('migrate_flavor_data failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
@ch_decorators.retry_on_exception(
5, base_delay=3, exc_type=subprocess.CalledProcessError)
def online_data_migrations_if_needed():
'''Runs nova-manage to run online data migrations available since Mitaka'''
if (hookenv.is_leader() and
ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common')) >= 'mitaka'):
hookenv.log('Running online_data_migrations', level=hookenv.INFO)
cmd = ['nova-manage', 'db', 'online_data_migrations']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
hookenv.log('online_data_migrations failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
def migrate_nova_api_database():
'''Initialize or migrate the nova_api database'''
if ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common')) >= 'mitaka':
hookenv.log('Migrating the nova-api database.', level=hookenv.INFO)
cmd = ['nova-manage', 'api_db', 'sync']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
# NOTE(coreycb): sync of api_db on upgrade from newton->ocata
# fails but cell init is successful.
hookenv.log('Ignoring CalledProcessError during nova-api database '
'migration\n{}'.format(e.output), level=hookenv.INFO)
def migrate_nova_database():
'''Initialize or migrate the nova database'''
hookenv.log('Migrating the nova database.', level=hookenv.INFO)
cmd = ['nova-manage', 'db', 'sync']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
hookenv.log('db sync failed\n{}'.format(e.output), level=hookenv.ERROR)
raise
def initialize_cell_databases():
'''Initialize the cell0 and cell1 databases
cell0 is stored in the database named 'nova_cell0'.
cell1 is stored in the database named 'nova'.
'''
hookenv.log('Creating cell0 database records', level=hookenv.INFO)
cmd = ['nova-manage', 'cell_v2', 'map_cell0']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
hookenv.log('map_cell0 failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
hookenv.log('Creating cell1 database records', level=hookenv.INFO)
cmd = ['nova-manage', 'cell_v2', 'create_cell', '--name', 'cell1',
'--verbose']
try:
subprocess.check_output(cmd)
hookenv.log('cell1 was successfully created', level=hookenv.INFO)
except subprocess.CalledProcessError as e:
if e.returncode == 1:
hookenv.log('Cell1 create_cell failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
elif e.returncode == 2:
hookenv.log(
'Cell1 create_cell failure ignored - a cell is already using '
'the transport_url/database combination.', level=hookenv.INFO)
def get_cell_uuid(cell, fatal=True):
'''Get cell uuid
:param cell: string cell name i.e. 'cell1'
:returns: string cell uuid
'''
hookenv.log("Listing cell, '{}'".format(cell), level=hookenv.INFO)
cells = get_cell_details()
cell_info = cells.get(cell)
if not cell_info:
if fatal:
raise Exception("Cannot find cell, '{}', in list_cells."
"".format(cell))
return None
return cell_info['uuid']
def get_cell_details():
'''Get cell details
:returns: string cell uuid
'''
hookenv.log("Getting details of cells", level=hookenv.INFO)
cells = {}
cmd = ['sudo', 'nova-manage', 'cell_v2', 'list_cells', '--verbose']
try:
out = subprocess.check_output(cmd).decode('utf-8')
except subprocess.CalledProcessError as e:
hookenv.log('list_cells failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
for line in out.split('\n'):
columns = line.split('|')
if len(columns) < 2:
continue
columns = [c.strip() for c in columns]
try:
uuid.UUID(columns[2].strip())
cells[columns[1]] = {
'uuid': columns[2],
'amqp': columns[3],
'db': columns[4]}
except ValueError:
pass
return cells
def update_cell_database():
'''Update the cell1 database properties
This should be called whenever a database or rabbitmq-server relation is
changed to update the transport_url in the nova_api cell_mappings table.
'''
hookenv.log('Updating cell1 properties', level=hookenv.INFO)
cell1_uuid = get_cell_uuid('cell1')
cmd = ['nova-manage', 'cell_v2', 'update_cell', '--cell_uuid', cell1_uuid]
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
if e.returncode == 1:
hookenv.log('Cell1 update_cell failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
elif e.returncode == 2:
hookenv.log(
'Cell1 update_cell failure ignored - the properties cannot '
'be set.', level=hookenv.INFO)
else:
hookenv.log('cell1 was successfully updated', level=hookenv.INFO)
def map_instances():
'''Map instances to cell
Updates nova_api.instance_mappings with pre-existing instances
:raises: Exception if Cell1 map_instances fails
'''
batch_size = '50000'
cell1_uuid = get_cell_uuid('cell1')
cmd = ['nova-manage', 'cell_v2', 'map_instances',
'--cell_uuid', cell1_uuid, '--max-count', batch_size]
iteration = 0
exit_code = 1
# Return code if 0 indicates all instances have been mapped. A return code
# of 1 indicates this batch is complete but there are more instances that
# still need mapping.
while exit_code == 1:
msg = 'Mapping instances. Batch number: {}'.format(iteration)
hookenv.status_set('maintenance', msg)
hookenv.log(msg, level=hookenv.INFO)
process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
stdout, stderr = process.communicate()
exit_code = process.wait()
if exit_code not in [0, 1]:
msg = 'Cell1 map_instances failed\nstdout: {}\nstderr: {}'.format(
stdout,
stderr)
hookenv.log(msg, level=hookenv.ERROR)
raise Exception(msg)
iteration += 1
msg = 'Mapping instances complete'
hookenv.status_set('maintenance', msg)
hookenv.log(msg, level=hookenv.INFO)
def archive_deleted_rows(max_rows=None):
hookenv.log('Archiving deleted rows', level=hookenv.INFO)
cmd = ['nova-manage', 'db', 'archive_deleted_rows', '--verbose']
if max_rows:
cmd.extend(['--max_rows', str(max_rows)])
process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
stdout, stderr = process.communicate()
exit_code = process.wait()
if exit_code not in [0, 1]:
msg = 'Archiving deleted rows failed\nstdout: {}\nstderr: {}'.format(
stdout,
stderr)
hookenv.log(msg, level=hookenv.ERROR)
raise Exception(msg)
else:
return stdout
def add_hosts_to_cell():
'''Map compute hosts to cell'''
hookenv.log('Cell1 discover_hosts', level=hookenv.INFO)
cell1_uuid = get_cell_uuid('cell1')
cmd = ['nova-manage', 'cell_v2', 'discover_hosts', '--cell_uuid',
cell1_uuid, '--verbose']
try:
subprocess.check_output(cmd)
except subprocess.CalledProcessError as e:
hookenv.log('Cell1 discover_hosts failed\n{}'.format(e.output),
level=hookenv.ERROR)
raise
def finalize_migrate_nova_databases():
if hookenv.relation_ids('cluster'):
hookenv.log('Informing peers that dbsync is complete',
level=hookenv.INFO)
ch_peerstorage.peer_store('dbsync_state', 'complete')
hookenv.log('Enabling services', level=hookenv.INFO)
if not ch_utils.is_unit_paused_set():
for svc in services():
ch_host.service_resume(svc)
else:
hookenv.log('Unit is in paused state, not issuing start/resume to all '
'services')
# NOTE(jamespage): Retry deals with sync issues during one-shot HA deploys.
# mysql might be restarting or suchlike.
@ch_decorators.retry_on_exception(
5, base_delay=3, exc_type=subprocess.CalledProcessError)
def migrate_nova_databases():
'''Runs nova-manage to initialize new databases or migrate existing'''
release = ch_utils.CompareOpenStackReleases(
ch_utils.os_release('nova-common'))
if release < 'ocata':
migrate_nova_api_database()
migrate_nova_database()
online_data_migrations_if_needed()
finalize_migrate_nova_databases()
elif is_cellv2_init_ready():
migrate_nova_api_database()
initialize_cell_databases()
migrate_nova_database()
online_data_migrations_if_needed()
add_hosts_to_cell()
# Populate the cells mapping table if upgrading to a cells
# environment for the first time eg Newton -> Ocata
if release == 'ocata':
map_instances()
finalize_migrate_nova_databases()
# TODO: refactor to use unit storage or related data
def auth_token_config(setting):
"""
Returns currently configured value for setting in api-paste.ini's
authtoken section, or None.
"""
_config = configparser.RawConfigParser()
_config.read('/etc/nova/api-paste.ini')
try:
value = _config.get('filter:authtoken', setting)
except Exception:
return None
if value.startswith('%'):
return None
return value
def keystone_ca_cert_b64():
'''Returns the local Keystone-provided CA cert if it exists, or None.'''
if not os.path.isfile(CA_CERT_PATH):
return None
with open(CA_CERT_PATH, 'rb') as _in:
return base64.b64encode(_in.read()).decode('utf-8')
def _ssh_directory_for_remote_service(remote_service, user=None):
"""Return the directory where ssh known hosts and authorized keys are
stored for a remote_service and user (both str)
:param remote_service: the key that represents the remote service; this is
usually derived from the first part of the unit name. See
`remote_service_from_unit()`.
:type remote_service: str
:param user: the user to use, default is None, meaning root (in effect)
:type user: Union[str, None]
:return: path suitable for joining
:rtype: str
"""