112 lines
3.9 KiB
Python
112 lines
3.9 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from heat.common import exception
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from heat.common.i18n import _
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from heat.engine import constraints
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from heat.engine import properties
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from heat.engine import resource
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from heat.engine import support
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NOVA_MICROVERSIONS = (MICROVERSION_SOFT_POLICIES, MICROVERSION_RULE) = ('2.15',
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'2.64')
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class ServerGroup(resource.Resource):
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"""A resource for managing a Nova server group.
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Server groups allow you to make sure instances (VM/VPS) are on the same
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hypervisor host or on a different one.
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"""
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support_status = support.SupportStatus(version='2014.2')
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default_client_name = 'nova'
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entity = 'server_groups'
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PROPERTIES = (
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NAME, POLICIES, RULES
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) = (
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'name', 'policies', 'rules'
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)
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_RULES = (MAX_SERVER_PER_HOST) = ('max_server_per_host')
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properties_schema = {
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NAME: properties.Schema(
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properties.Schema.STRING,
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_('Server Group name.')
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),
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POLICIES: properties.Schema(
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properties.Schema.LIST,
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_('A list of exactly one policy to apply. '
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'Defaults to anti-affinity.'),
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default=['anti-affinity'],
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constraints=[
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constraints.AllowedValues(["anti-affinity", "affinity",
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"soft-anti-affinity",
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"soft-affinity"])
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],
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schema=properties.Schema(
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properties.Schema.STRING,
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),
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),
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RULES: properties.Schema(
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properties.Schema.MAP,
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_('Rules for a policy.'),
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schema={
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MAX_SERVER_PER_HOST: properties.Schema(
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properties.Schema.NUMBER,
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_('Maximum servers in a group on a given host. '
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'Rule for anti-affinity policy.')
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)
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},
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support_status=support.SupportStatus(version='17.0.0'),
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),
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}
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def validate(self):
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super(ServerGroup, self).validate()
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policies = self.properties[self.POLICIES]
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is_supported = self.client_plugin().is_version_supported(
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MICROVERSION_SOFT_POLICIES)
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if (('soft-affinity' in policies or
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'soft-anti-affinity' in policies) and not is_supported):
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msg = _('Required microversion for soft policies not supported.')
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raise exception.StackValidationFailed(message=msg)
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if self.properties[self.RULES]:
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is_supported = self.client_plugin().is_version_supported(
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MICROVERSION_RULE)
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if not is_supported:
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msg = _('Required microversion for rules not supported.')
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raise exception.StackValidationFailed(message=msg)
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def handle_create(self):
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name = self.physical_resource_name()
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policies = self.properties[self.POLICIES]
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rules = self.properties[self.RULES]
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server_group = self.client().server_groups.create(
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name=name, policy=policies[0], rules=rules)
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self.resource_id_set(server_group.id)
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def physical_resource_name(self):
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name = self.properties[self.NAME]
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if name:
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return name
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return super(ServerGroup, self).physical_resource_name()
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def resource_mapping():
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return {'OS::Nova::ServerGroup': ServerGroup}
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