460 lines
22 KiB
Python
460 lines
22 KiB
Python
# Copyright 2011 OpenStack Foundation
|
|
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
|
|
from oslo_log import log as logging
|
|
from oslo_service import periodic_task
|
|
from oslo_utils import importutils
|
|
|
|
from trove.backup.models import Backup
|
|
import trove.common.cfg as cfg
|
|
from trove.common.context import TroveContext
|
|
from trove.common import exception
|
|
from trove.common.exception import ReplicationSlaveAttachError
|
|
from trove.common.exception import TroveError
|
|
from trove.common.i18n import _
|
|
from trove.common.notification import DBaaSQuotas, EndNotification
|
|
from trove.common import remote
|
|
from trove.common import server_group as srv_grp
|
|
from trove.common.strategies.cluster import strategy
|
|
from trove.datastore.models import DatastoreVersion
|
|
import trove.extensions.mgmt.instances.models as mgmtmodels
|
|
from trove.instance.tasks import InstanceTasks
|
|
from trove.taskmanager import models
|
|
from trove.taskmanager.models import FreshInstanceTasks, BuiltInstanceTasks
|
|
from trove.quota.quota import QUOTAS
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
CONF = cfg.CONF
|
|
|
|
|
|
class Manager(periodic_task.PeriodicTasks):
|
|
|
|
def __init__(self):
|
|
super(Manager, self).__init__(CONF)
|
|
self.admin_context = TroveContext(
|
|
user=CONF.nova_proxy_admin_user,
|
|
auth_token=CONF.nova_proxy_admin_pass,
|
|
tenant=CONF.nova_proxy_admin_tenant_id)
|
|
if CONF.exists_notification_transformer:
|
|
self.exists_transformer = importutils.import_object(
|
|
CONF.exists_notification_transformer,
|
|
context=self.admin_context)
|
|
|
|
def resize_volume(self, context, instance_id, new_size):
|
|
with EndNotification(context):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.resize_volume(new_size)
|
|
|
|
def resize_flavor(self, context, instance_id, old_flavor, new_flavor):
|
|
with EndNotification(context):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.resize_flavor(old_flavor, new_flavor)
|
|
|
|
def reboot(self, context, instance_id):
|
|
with EndNotification(context):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.reboot()
|
|
|
|
def restart(self, context, instance_id):
|
|
with EndNotification(context):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.restart()
|
|
|
|
def detach_replica(self, context, instance_id):
|
|
with EndNotification(context):
|
|
slave = models.BuiltInstanceTasks.load(context, instance_id)
|
|
master_id = slave.slave_of_id
|
|
master = models.BuiltInstanceTasks.load(context, master_id)
|
|
slave.detach_replica(master)
|
|
|
|
def _set_task_status(self, instances, status):
|
|
for instance in instances:
|
|
setattr(instance.db_info, 'task_status', status)
|
|
instance.db_info.save()
|
|
|
|
def promote_to_replica_source(self, context, instance_id):
|
|
# TODO(atomic77) Promote and eject need to be able to handle the case
|
|
# where a datastore like Postgresql needs to treat the slave to be
|
|
# promoted differently from the old master and the slaves which will
|
|
# be simply reassigned to a new master. See:
|
|
# https://bugs.launchpad.net/trove/+bug/1553339
|
|
|
|
def _promote_to_replica_source(old_master, master_candidate,
|
|
replica_models):
|
|
# First, we transition from the old master to new as quickly as
|
|
# possible to minimize the scope of unrecoverable error
|
|
old_master.make_read_only(True)
|
|
master_ips = old_master.detach_public_ips()
|
|
slave_ips = master_candidate.detach_public_ips()
|
|
latest_txn_id = old_master.get_latest_txn_id()
|
|
master_candidate.wait_for_txn(latest_txn_id)
|
|
master_candidate.detach_replica(old_master, for_failover=True)
|
|
master_candidate.enable_as_master()
|
|
old_master.attach_replica(master_candidate)
|
|
master_candidate.attach_public_ips(master_ips)
|
|
master_candidate.make_read_only(False)
|
|
old_master.attach_public_ips(slave_ips)
|
|
|
|
# At this point, should something go wrong, there
|
|
# should be a working master with some number of working slaves,
|
|
# and possibly some number of "orphaned" slaves
|
|
|
|
exception_replicas = []
|
|
error_messages = ""
|
|
for replica in replica_models:
|
|
try:
|
|
if replica.id != master_candidate.id:
|
|
replica.detach_replica(old_master, for_failover=True)
|
|
replica.attach_replica(master_candidate)
|
|
except exception.TroveError as ex:
|
|
msg = (_("Unable to migrate replica %(slave)s from "
|
|
"old replica source %(old_master)s to "
|
|
"new source %(new_master)s on promote.") %
|
|
{"slave": replica.id,
|
|
"old_master": old_master.id,
|
|
"new_master": master_candidate.id})
|
|
LOG.exception(msg)
|
|
exception_replicas.append(replica)
|
|
error_messages += "%s (%s)\n" % (msg, ex)
|
|
|
|
try:
|
|
old_master.demote_replication_master()
|
|
except Exception as ex:
|
|
msg = (_("Exception demoting old replica source %s.") %
|
|
old_master.id)
|
|
LOG.exception(msg)
|
|
exception_replicas.append(old_master)
|
|
error_messages += "%s (%s)\n" % (msg, ex)
|
|
|
|
self._set_task_status([old_master] + replica_models,
|
|
InstanceTasks.NONE)
|
|
if exception_replicas:
|
|
self._set_task_status(exception_replicas,
|
|
InstanceTasks.PROMOTION_ERROR)
|
|
msg = (_("promote-to-replica-source %(id)s: The following "
|
|
"replicas may not have been switched: %(replicas)s:"
|
|
"\n%(err)s") %
|
|
{"id": master_candidate.id,
|
|
"replicas": [repl.id for repl in exception_replicas],
|
|
"err": error_messages})
|
|
raise ReplicationSlaveAttachError(msg)
|
|
|
|
with EndNotification(context):
|
|
master_candidate = BuiltInstanceTasks.load(context, instance_id)
|
|
old_master = BuiltInstanceTasks.load(context,
|
|
master_candidate.slave_of_id)
|
|
replicas = []
|
|
for replica_dbinfo in old_master.slaves:
|
|
if replica_dbinfo.id == instance_id:
|
|
replica = master_candidate
|
|
else:
|
|
replica = BuiltInstanceTasks.load(context,
|
|
replica_dbinfo.id)
|
|
replicas.append(replica)
|
|
|
|
try:
|
|
_promote_to_replica_source(old_master, master_candidate,
|
|
replicas)
|
|
except ReplicationSlaveAttachError:
|
|
raise
|
|
except Exception:
|
|
self._set_task_status([old_master] + replicas,
|
|
InstanceTasks.PROMOTION_ERROR)
|
|
raise
|
|
|
|
# pulled out to facilitate testing
|
|
def _get_replica_txns(self, replica_models):
|
|
return [[repl] + repl.get_last_txn() for repl in replica_models]
|
|
|
|
def _most_current_replica(self, old_master, replica_models):
|
|
last_txns = self._get_replica_txns(replica_models)
|
|
master_ids = [txn[1] for txn in last_txns if txn[1]]
|
|
if len(set(master_ids)) > 1:
|
|
raise TroveError(_("Replicas of %s not all replicating"
|
|
" from same master") % old_master.id)
|
|
return sorted(last_txns, key=lambda x: x[2], reverse=True)[0][0]
|
|
|
|
def eject_replica_source(self, context, instance_id):
|
|
|
|
def _eject_replica_source(old_master, replica_models):
|
|
|
|
master_candidate = self._most_current_replica(old_master,
|
|
replica_models)
|
|
|
|
master_ips = old_master.detach_public_ips()
|
|
slave_ips = master_candidate.detach_public_ips()
|
|
master_candidate.detach_replica(old_master, for_failover=True)
|
|
master_candidate.enable_as_master()
|
|
master_candidate.attach_public_ips(master_ips)
|
|
master_candidate.make_read_only(False)
|
|
old_master.attach_public_ips(slave_ips)
|
|
|
|
exception_replicas = []
|
|
error_messages = ""
|
|
for replica in replica_models:
|
|
try:
|
|
if replica.id != master_candidate.id:
|
|
replica.detach_replica(old_master, for_failover=True)
|
|
replica.attach_replica(master_candidate)
|
|
except exception.TroveError as ex:
|
|
msg = (_("Unable to migrate replica %(slave)s from "
|
|
"old replica source %(old_master)s to "
|
|
"new source %(new_master)s on eject.") %
|
|
{"slave": replica.id,
|
|
"old_master": old_master.id,
|
|
"new_master": master_candidate.id})
|
|
LOG.exception(msg)
|
|
exception_replicas.append(replica)
|
|
error_messages += "%s (%s)\n" % (msg, ex)
|
|
|
|
self._set_task_status([old_master] + replica_models,
|
|
InstanceTasks.NONE)
|
|
if exception_replicas:
|
|
self._set_task_status(exception_replicas,
|
|
InstanceTasks.EJECTION_ERROR)
|
|
msg = (_("eject-replica-source %(id)s: The following "
|
|
"replicas may not have been switched: %(replicas)s:"
|
|
"\n%(err)s") %
|
|
{"id": master_candidate.id,
|
|
"replicas": [repl.id for repl in exception_replicas],
|
|
"err": error_messages})
|
|
raise ReplicationSlaveAttachError(msg)
|
|
|
|
with EndNotification(context):
|
|
master = BuiltInstanceTasks.load(context, instance_id)
|
|
replicas = [BuiltInstanceTasks.load(context, dbinfo.id)
|
|
for dbinfo in master.slaves]
|
|
try:
|
|
_eject_replica_source(master, replicas)
|
|
except ReplicationSlaveAttachError:
|
|
raise
|
|
except Exception:
|
|
self._set_task_status([master] + replicas,
|
|
InstanceTasks.EJECTION_ERROR)
|
|
raise
|
|
|
|
def migrate(self, context, instance_id, host):
|
|
with EndNotification(context):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.migrate(host)
|
|
|
|
def delete_instance(self, context, instance_id):
|
|
with EndNotification(context):
|
|
try:
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.delete_async()
|
|
except exception.UnprocessableEntity:
|
|
instance_tasks = models.FreshInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.delete_async()
|
|
|
|
def delete_backup(self, context, backup_id):
|
|
with EndNotification(context):
|
|
models.BackupTasks.delete_backup(context, backup_id)
|
|
|
|
def create_backup(self, context, backup_info, instance_id):
|
|
with EndNotification(context, backup_id=backup_info['id']):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context,
|
|
instance_id)
|
|
instance_tasks.create_backup(backup_info)
|
|
|
|
def _create_replication_slave(self, context, instance_id, name, flavor,
|
|
image_id, databases, users,
|
|
datastore_manager, packages, volume_size,
|
|
availability_zone, root_password, nics,
|
|
overrides, slave_of_id, backup_id,
|
|
volume_type, modules):
|
|
|
|
if type(instance_id) in [list]:
|
|
ids = instance_id
|
|
root_passwords = root_password
|
|
else:
|
|
ids = [instance_id]
|
|
root_passwords = [root_password]
|
|
replica_number = 0
|
|
replica_backup_id = backup_id
|
|
replica_backup_created = False
|
|
replicas = []
|
|
|
|
master_instance_tasks = BuiltInstanceTasks.load(context, slave_of_id)
|
|
server_group = master_instance_tasks.server_group
|
|
scheduler_hints = srv_grp.ServerGroup.convert_to_hint(server_group)
|
|
LOG.debug("Using scheduler hints for locality: %s" % scheduler_hints)
|
|
|
|
try:
|
|
for replica_index in range(0, len(ids)):
|
|
try:
|
|
replica_number += 1
|
|
LOG.debug("Creating replica %d of %d."
|
|
% (replica_number, len(ids)))
|
|
instance_tasks = FreshInstanceTasks.load(
|
|
context, ids[replica_index])
|
|
snapshot = instance_tasks.get_replication_master_snapshot(
|
|
context, slave_of_id, flavor, replica_backup_id,
|
|
replica_number=replica_number)
|
|
replica_backup_id = snapshot['dataset']['snapshot_id']
|
|
replica_backup_created = (replica_backup_id is not None)
|
|
instance_tasks.create_instance(
|
|
flavor, image_id, databases, users, datastore_manager,
|
|
packages, volume_size, replica_backup_id,
|
|
availability_zone, root_passwords[replica_index],
|
|
nics, overrides, None, snapshot, volume_type,
|
|
modules, scheduler_hints)
|
|
replicas.append(instance_tasks)
|
|
except Exception:
|
|
# if it's the first replica, then we shouldn't continue
|
|
LOG.exception(_(
|
|
"Could not create replica %(num)d of %(count)d.")
|
|
% {'num': replica_number, 'count': len(ids)})
|
|
if replica_number == 1:
|
|
raise
|
|
|
|
for replica in replicas:
|
|
replica.wait_for_instance(CONF.restore_usage_timeout, flavor)
|
|
|
|
finally:
|
|
if replica_backup_created:
|
|
Backup.delete(context, replica_backup_id)
|
|
|
|
def _create_instance(self, context, instance_id, name, flavor,
|
|
image_id, databases, users, datastore_manager,
|
|
packages, volume_size, backup_id, availability_zone,
|
|
root_password, nics, overrides, slave_of_id,
|
|
cluster_config, volume_type, modules, locality):
|
|
if slave_of_id:
|
|
self._create_replication_slave(context, instance_id, name,
|
|
flavor, image_id, databases, users,
|
|
datastore_manager, packages,
|
|
volume_size,
|
|
availability_zone, root_password,
|
|
nics, overrides, slave_of_id,
|
|
backup_id, volume_type, modules)
|
|
else:
|
|
if type(instance_id) in [list]:
|
|
raise AttributeError(_(
|
|
"Cannot create multiple non-replica instances."))
|
|
instance_tasks = FreshInstanceTasks.load(context, instance_id)
|
|
|
|
scheduler_hints = srv_grp.ServerGroup.build_scheduler_hint(
|
|
context, locality, instance_id)
|
|
instance_tasks.create_instance(flavor, image_id, databases, users,
|
|
datastore_manager, packages,
|
|
volume_size, backup_id,
|
|
availability_zone, root_password,
|
|
nics, overrides, cluster_config,
|
|
None, volume_type, modules,
|
|
scheduler_hints)
|
|
timeout = (CONF.restore_usage_timeout if backup_id
|
|
else CONF.usage_timeout)
|
|
instance_tasks.wait_for_instance(timeout, flavor)
|
|
|
|
def create_instance(self, context, instance_id, name, flavor,
|
|
image_id, databases, users, datastore_manager,
|
|
packages, volume_size, backup_id, availability_zone,
|
|
root_password, nics, overrides, slave_of_id,
|
|
cluster_config, volume_type, modules, locality):
|
|
with EndNotification(context,
|
|
instance_id=(instance_id[0]
|
|
if isinstance(instance_id, list)
|
|
else instance_id)):
|
|
self._create_instance(context, instance_id, name, flavor,
|
|
image_id, databases, users,
|
|
datastore_manager, packages, volume_size,
|
|
backup_id, availability_zone,
|
|
root_password, nics, overrides, slave_of_id,
|
|
cluster_config, volume_type, modules,
|
|
locality)
|
|
|
|
def upgrade(self, context, instance_id, datastore_version_id):
|
|
instance_tasks = models.BuiltInstanceTasks.load(context, instance_id)
|
|
datastore_version = DatastoreVersion.load_by_uuid(datastore_version_id)
|
|
with EndNotification(context):
|
|
instance_tasks.upgrade(datastore_version)
|
|
|
|
def create_cluster(self, context, cluster_id):
|
|
with EndNotification(context, cluster_id=cluster_id):
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.create_cluster(context, cluster_id)
|
|
|
|
def grow_cluster(self, context, cluster_id, new_instance_ids):
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.grow_cluster(context, cluster_id, new_instance_ids)
|
|
|
|
def shrink_cluster(self, context, cluster_id, instance_ids):
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.shrink_cluster(context, cluster_id, instance_ids)
|
|
|
|
def restart_cluster(self, context, cluster_id):
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.restart_cluster(context, cluster_id)
|
|
|
|
def upgrade_cluster(self, context, cluster_id, datastore_version_id):
|
|
datastore_version = DatastoreVersion.load_by_uuid(datastore_version_id)
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.upgrade_cluster(context, cluster_id, datastore_version)
|
|
|
|
def delete_cluster(self, context, cluster_id):
|
|
with EndNotification(context):
|
|
cluster_tasks = models.load_cluster_tasks(context, cluster_id)
|
|
cluster_tasks.delete_cluster(context, cluster_id)
|
|
|
|
if CONF.exists_notification_transformer:
|
|
@periodic_task.periodic_task
|
|
def publish_exists_event(self, context):
|
|
"""
|
|
Push this in Instance Tasks to fetch a report/collection
|
|
:param context: currently None as specied in bin script
|
|
"""
|
|
mgmtmodels.publish_exist_events(self.exists_transformer,
|
|
self.admin_context)
|
|
|
|
if CONF.quota_notification_interval:
|
|
@periodic_task.periodic_task(spacing=CONF.quota_notification_interval)
|
|
def publish_quota_notifications(self, context):
|
|
nova_client = remote.create_nova_client(self.admin_context)
|
|
for tenant in nova_client.tenants.list():
|
|
for quota in QUOTAS.get_all_quotas_by_tenant(tenant.id):
|
|
usage = QUOTAS.get_quota_usage(quota)
|
|
DBaaSQuotas(self.admin_context, quota, usage).notify()
|
|
|
|
def __getattr__(self, name):
|
|
"""
|
|
We should only get here if Python couldn't find a "real" method.
|
|
"""
|
|
|
|
def raise_error(msg):
|
|
raise AttributeError(msg)
|
|
|
|
manager, sep, method = name.partition('_')
|
|
if not manager:
|
|
raise_error('Cannot derive manager from attribute name "%s"' %
|
|
name)
|
|
|
|
task_strategy = strategy.load_taskmanager_strategy(manager)
|
|
if not task_strategy:
|
|
raise_error('No task manager strategy for manager "%s"' % manager)
|
|
|
|
if method not in task_strategy.task_manager_manager_actions:
|
|
raise_error('No method "%s" for task manager strategy for manager'
|
|
' "%s"' % (method, manager))
|
|
|
|
return task_strategy.task_manager_manager_actions.get(method)
|