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# Copyright [2015] Hewlett-Packard Development Company, L.P.
# Copyright 2016 Tesora Inc.
# 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
import time
from trove.cluster import models as cluster_models
from trove.cluster.tasks import ClusterTasks
from trove.cluster.views import ClusterView
from trove.common import cfg
from trove.common import exception
from trove.common import server_group as srv_grp
from trove.common.strategies.cluster import base as cluster_base
from trove.extensions.mgmt.clusters.views import MgmtClusterView
from trove.instance.models import DBInstance
from trove.instance.models import Instance
from trove.quota.quota import check_quotas
from trove.taskmanager import api as task_api
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
class GaleraCommonAPIStrategy(cluster_base.BaseAPIStrategy):
@property
def cluster_class(self):
return GaleraCommonCluster
@property
def cluster_view_class(self):
return GaleraCommonClusterView
@property
def mgmt_cluster_view_class(self):
return GaleraCommonMgmtClusterView
class GaleraCommonCluster(cluster_models.Cluster):
@staticmethod
def _validate_cluster_instances(context, instances, datastore,
datastore_version):
"""Validate the flavor and volume"""
ds_conf = CONF.get(datastore_version.manager)
num_instances = len(instances)
# Checking volumes and get delta for quota check
cluster_models.validate_instance_flavors(
context, instances, ds_conf.volume_support, ds_conf.device_path)
req_volume_size = cluster_models.get_required_volume_size(
instances, ds_conf.volume_support)
cluster_models.assert_homogeneous_cluster(instances)
deltas = {'instances': num_instances, 'volumes': req_volume_size}
# quota check
check_quotas(context.project_id, deltas)
# Checking networks are same for the cluster
cluster_models.validate_instance_nics(context, instances)
@staticmethod
def _create_instances(context, db_info, datastore, datastore_version,
instances, extended_properties, locality,
configuration_id):
member_config = {"id": db_info.id,
"instance_type": "member"}
name_index = int(time.time())
for instance in instances:
if not instance.get("name"):
instance['name'] = "%s-member-%s" % (db_info.name,
str(name_index))
name_index += 1
return [Instance.create(context,
instance['name'],
instance['flavor_id'],
datastore_version.image_id,
[], [],
datastore, datastore_version,
instance.get('volume_size', None),
None,
availability_zone=instance.get(
'availability_zone', None),
nics=instance.get('nics', None),
configuration_id=configuration_id,
cluster_config=member_config,
volume_type=instance.get(
'volume_type', None),
modules=instance.get('modules'),
locality=locality,
region_name=instance.get('region_name')
)
for instance in instances]
@classmethod
def create(cls, context, name, datastore, datastore_version,
instances, extended_properties, locality, configuration):
LOG.debug("Initiating Galera cluster creation.")
ds_conf = CONF.get(datastore_version.manager)
# Check number of instances is at least min_cluster_member_count
if len(instances) < ds_conf.min_cluster_member_count:
raise exception.ClusterNumInstancesNotLargeEnough(
num_instances=ds_conf.min_cluster_member_count)
cls._validate_cluster_instances(context, instances, datastore,
datastore_version)
# Updating Cluster Task
db_info = cluster_models.DBCluster.create(
name=name, tenant_id=context.project_id,
datastore_version_id=datastore_version.id,
task_status=ClusterTasks.BUILDING_INITIAL,
configuration_id=configuration)
cls._create_instances(context, db_info, datastore, datastore_version,
instances, extended_properties, locality,
configuration)
# Calling taskmanager to further proceed for cluster-configuration
task_api.load(context, datastore_version.manager).create_cluster(
db_info.id)
return cls(context, db_info, datastore, datastore_version)
def grow(self, instances):
LOG.debug("Growing cluster %s.", self.id)
self.validate_cluster_available()
context = self.context
db_info = self.db_info
datastore = self.ds
datastore_version = self.ds_version
self._validate_cluster_instances(context, instances, datastore,
datastore_version)
db_info.update(task_status=ClusterTasks.GROWING_CLUSTER)
try:
locality = srv_grp.ServerGroup.convert_to_hint(self.server_group)
configuration_id = self.db_info.configuration_id
new_instances = self._create_instances(
context, db_info, datastore, datastore_version, instances,
None, locality, configuration_id)
task_api.load(context, datastore_version.manager).grow_cluster(
db_info.id, [instance.id for instance in new_instances])
except Exception:
db_info.update(task_status=ClusterTasks.NONE)
raise
return self.__class__(context, db_info,
datastore, datastore_version)
def shrink(self, instances):
"""Removes instances from a cluster."""
LOG.debug("Shrinking cluster %s.", self.id)
self.validate_cluster_available()
removal_instances = [Instance.load(self.context, inst_id)
for inst_id in instances]
db_instances = DBInstance.find_all(
cluster_id=self.db_info.id, deleted=False).all()
if len(db_instances) - len(removal_instances) < 1:
raise exception.ClusterShrinkMustNotLeaveClusterEmpty()
self.db_info.update(task_status=ClusterTasks.SHRINKING_CLUSTER)
try:
task_api.load(self.context, self.ds_version.manager
).shrink_cluster(self.db_info.id,
[instance.id
for instance in removal_instances])
except Exception:
self.db_info.update(task_status=ClusterTasks.NONE)
raise
return self.__class__(self.context, self.db_info,
self.ds, self.ds_version)
def restart(self):
self.rolling_restart()
def upgrade(self, datastore_version):
self.rolling_upgrade(datastore_version)
def configuration_attach(self, configuration_id):
self.rolling_configuration_update(configuration_id)
def configuration_detach(self):
self.rolling_configuration_remove()
class GaleraCommonClusterView(ClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
class GaleraCommonMgmtClusterView(MgmtClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
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