1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
# Copyright 2015 Tesora Inc.
# 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 trove.cluster import models
from trove.cluster.tasks import ClusterTasks
from trove.cluster.views import ClusterView
from trove.common import cfg
from trove.common import server_group as srv_grp
from trove.common.strategies.cluster import base
from trove.common.strategies.cluster.experimental.cassandra import taskmanager
from trove.common import utils
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 CassandraAPIStrategy(base.BaseAPIStrategy):
@property
def cluster_class(self):
return CassandraCluster
@property
def cluster_controller_actions(self):
return {
'grow': self._action_grow_cluster,
'shrink': self._action_shrink_cluster
}
def _action_grow_cluster(self, cluster, body):
nodes = body['grow']
instances = []
for node in nodes:
instance = {
'flavor_id': utils.get_id_from_href(node['flavorRef'])
}
if 'name' in node:
instance['name'] = node['name']
if 'volume' in node:
instance['volume_size'] = int(node['volume']['size'])
instances.append(instance)
return cluster.grow(instances)
def _action_shrink_cluster(self, cluster, body):
nodes = body['shrink']
instance_ids = [node['id'] for node in nodes]
return cluster.shrink(instance_ids)
@property
def cluster_view_class(self):
return CassandraClusterView
@property
def mgmt_cluster_view_class(self):
return CassandraMgmtClusterView
class CassandraCluster(models.Cluster):
DEFAULT_DATA_CENTER = "dc1"
DEFAULT_RACK = "rack1"
@classmethod
def create(cls, context, name, datastore, datastore_version,
instances, extended_properties, locality, configuration):
LOG.debug("Processing a request for creating a new cluster.")
# 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,
configuration_id=configuration)
cls._create_cluster_instances(
context, db_info.id, db_info.name,
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 CassandraCluster(context, db_info, datastore, datastore_version)
@classmethod
def _create_cluster_instances(
cls, context, cluster_id, cluster_name,
datastore, datastore_version, instances, extended_properties,
locality, configuration_id):
LOG.debug("Processing a request for new cluster instances.")
cassandra_conf = CONF.get(datastore_version.manager)
eph_enabled = cassandra_conf.device_path
vol_enabled = cassandra_conf.volume_support
# Validate instance flavors.
models.validate_instance_flavors(context, instances,
vol_enabled, eph_enabled)
# Compute the total volume allocation.
req_volume_size = models.get_required_volume_size(instances,
vol_enabled)
# Check requirements against quota.
num_new_instances = len(instances)
deltas = {'instances': num_new_instances, 'volumes': req_volume_size}
models.assert_homogeneous_cluster(instances)
check_quotas(context.project_id, deltas)
# Checking networks are same for the cluster
models.validate_instance_nics(context, instances)
# Creating member instances.
num_instances = len(
taskmanager.CassandraClusterTasks.find_cluster_node_ids(cluster_id)
)
new_instances = []
for instance_idx, instance in enumerate(instances, num_instances + 1):
instance_az = instance.get('availability_zone', None)
member_config = {"id": cluster_id,
"instance_type": "member",
"dc": cls.DEFAULT_DATA_CENTER,
"rack": instance_az or cls.DEFAULT_RACK}
instance_name = instance.get('name')
if not instance_name:
instance_name = cls._build_instance_name(
cluster_name, member_config['dc'], member_config['rack'],
instance_idx)
new_instance = inst_models.Instance.create(
context, instance_name,
instance['flavor_id'],
datastore_version.image_id,
[], [],
datastore, datastore_version,
instance['volume_size'], None,
nics=instance.get('nics', None),
availability_zone=instance_az,
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'))
new_instances.append(new_instance)
return new_instances
@classmethod
def _build_instance_name(cls, cluster_name, dc, rack, instance_idx):
return "%s-member-%s-%s-%d" % (cluster_name, dc, rack, instance_idx)
def grow(self, instances):
LOG.debug("Processing a request for 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
db_info.update(task_status=ClusterTasks.GROWING_CLUSTER)
locality = srv_grp.ServerGroup.convert_to_hint(self.server_group)
configuration_id = self.db_info.configuration_id
new_instances = self._create_cluster_instances(
context, db_info.id, db_info.name, 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])
return CassandraCluster(context, db_info, datastore, datastore_version)
def shrink(self, removal_ids):
LOG.debug("Processing a request for shrinking cluster: %s", self.id)
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.SHRINKING_CLUSTER)
task_api.load(context, datastore_version.manager).shrink_cluster(
db_info.id, removal_ids)
return CassandraCluster(context, db_info, datastore, datastore_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, apply_on_all=False)
def configuration_detach(self):
self.rolling_configuration_remove(apply_on_all=False)
class CassandraClusterView(ClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
class CassandraMgmtClusterView(MgmtClusterView):
def build_instances(self):
return self._build_instances(['member'], ['member'])
|
