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# Copyright [2015] Hewlett-Packard Development Company, L.P.
# 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 trove.cluster import models
from trove.cluster.models import Cluster
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
from trove.extensions.mgmt.clusters.views import MgmtClusterView
from trove.instance import models as inst_models
from trove.quota.quota import check_quotas
from trove.taskmanager import api as task_api
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
class RedisAPIStrategy(base.BaseAPIStrategy):
@property
def cluster_class(self):
return RedisCluster
@property
def cluster_view_class(self):
return RedisClusterView
@property
def mgmt_cluster_view_class(self):
return RedisMgmtClusterView
class RedisCluster(models.Cluster):
@staticmethod
def _create_instances(context, db_info, datastore, datastore_version,
instances, extended_properties, locality):
redis_conf = CONF.get(datastore_version.manager)
ephemeral_enabled = redis_conf.device_path
volume_enabled = redis_conf.volume_support
num_instances = len(instances)
models.validate_instance_flavors(
context, instances, volume_enabled, ephemeral_enabled)
total_volume_allocation = models.get_required_volume_size(
instances, volume_enabled)
models.assert_homogeneous_cluster(instances)
models.validate_instance_nics(context, instances)
name_index = 1
for instance in instances:
if not instance.get('name'):
instance['name'] = "%s-member-%s" % (db_info.name, name_index)
name_index += 1
# Check quotas
quota_request = {'instances': num_instances,
'volumes': total_volume_allocation}
check_quotas(context.project_id, quota_request)
# Creating member instances
return [inst_models.Instance.create(context,
instance['name'],
instance['flavor_id'],
datastore_version.image_id,
[], [],
datastore, datastore_version,
instance.get('volume_size'),
None,
instance.get(
'availability_zone', None),
instance.get('nics', None),
configuration_id=None,
cluster_config={
"id": db_info.id,
"instance_type": "member"},
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 cluster creation.")
if configuration:
raise exception.ConfigurationNotSupported()
# Updating Cluster Task
db_info = models.DBCluster.create(
name=name, tenant_id=context.project_id,
datastore_version_id=datastore_version.id,
task_status=ClusterTasks.BUILDING_INITIAL)
cls._create_instances(context, db_info, datastore, datastore_version,
instances, extended_properties, locality)
# Calling taskmanager to further proceed for cluster-configuration
task_api.load(context, datastore_version.manager).create_cluster(
db_info.id)
return RedisCluster(context, db_info, datastore, datastore_version)
def upgrade(self, datastore_version):
self.rolling_upgrade(datastore_version)
def grow(self, instances):
LOG.debug("Growing cluster.")
self.validate_cluster_available()
context = self.context
db_info = self.db_info
datastore = self.ds
datastore_version = self.ds_version
db_info.update(task_status=ClusterTasks.GROWING_CLUSTER)
locality = srv_grp.ServerGroup.convert_to_hint(self.server_group)
new_instances = self._create_instances(context, db_info,
datastore, datastore_version,
instances, None, locality)
task_api.load(context, datastore_version.manager).grow_cluster(
db_info.id, [instance.id for instance in new_instances])
return RedisCluster(context, db_info, datastore, datastore_version)
def shrink(self, removal_ids):
LOG.debug("Shrinking cluster %s.", self.id)
self.validate_cluster_available()
cluster_info = self.db_info
cluster_info.update(task_status=ClusterTasks.SHRINKING_CLUSTER)
try:
removal_insts = [inst_models.Instance.load(self.context, inst_id)
for inst_id in removal_ids]
node_ids = []
error_ids = []
for instance in removal_insts:
node_id = Cluster.get_guest(instance).get_node_id_for_removal()
if node_id:
node_ids.append(node_id)
else:
error_ids.append(instance.id)
if error_ids:
raise exception.ClusterShrinkInstanceInUse(
id=error_ids,
reason="Nodes cannot be removed. Check slots."
)
all_instances = (
inst_models.DBInstance.find_all(cluster_id=self.id,
deleted=False).all())
remain_insts = [inst_models.Instance.load(self.context, inst.id)
for inst in all_instances
if inst.id not in removal_ids]
for inst in remain_insts:
guest = Cluster.get_guest(inst)
guest.remove_nodes(node_ids)
for inst in removal_insts:
inst.update_db(cluster_id=None)
for inst in removal_insts:
inst_models.Instance.delete(inst)
return RedisCluster(self.context, cluster_info,
self.ds, self.ds_version)
finally:
cluster_info.update(task_status=ClusterTasks.NONE)
class RedisClusterView(ClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
class RedisMgmtClusterView(MgmtClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
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