740 lines
26 KiB
Python
740 lines
26 KiB
Python
#
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# 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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import six
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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 attributes
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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.resources.openstack.neutron import neutron
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from heat.engine import support
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class HealthMonitor(neutron.NeutronResource):
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"""
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A resource for managing health monitors for load balancers in Neutron.
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"""
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PROPERTIES = (
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DELAY, TYPE, MAX_RETRIES, TIMEOUT, ADMIN_STATE_UP,
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HTTP_METHOD, EXPECTED_CODES, URL_PATH,
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) = (
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'delay', 'type', 'max_retries', 'timeout', 'admin_state_up',
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'http_method', 'expected_codes', 'url_path',
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)
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ATTRIBUTES = (
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ADMIN_STATE_UP_ATTR, DELAY_ATTR, EXPECTED_CODES_ATTR, HTTP_METHOD_ATTR,
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MAX_RETRIES_ATTR, TIMEOUT_ATTR, TYPE_ATTR, URL_PATH_ATTR, TENANT_ID,
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SHOW,
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) = (
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'admin_state_up', 'delay', 'expected_codes', 'http_method',
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'max_retries', 'timeout', 'type', 'url_path', 'tenant_id',
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'show',
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)
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properties_schema = {
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DELAY: properties.Schema(
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properties.Schema.INTEGER,
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_('The minimum time in seconds between regular connections of '
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'the member.'),
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required=True,
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update_allowed=True
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),
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TYPE: properties.Schema(
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properties.Schema.STRING,
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_('One of predefined health monitor types.'),
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required=True,
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constraints=[
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constraints.AllowedValues(['PING', 'TCP', 'HTTP', 'HTTPS']),
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]
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),
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MAX_RETRIES: properties.Schema(
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properties.Schema.INTEGER,
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_('Number of permissible connection failures before changing the '
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'member status to INACTIVE.'),
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required=True,
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update_allowed=True
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),
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TIMEOUT: properties.Schema(
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properties.Schema.INTEGER,
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_('Maximum number of seconds for a monitor to wait for a '
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'connection to be established before it times out.'),
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required=True,
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update_allowed=True
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),
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ADMIN_STATE_UP: properties.Schema(
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properties.Schema.BOOLEAN,
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_('The administrative state of the health monitor.'),
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default=True,
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update_allowed=True
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),
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HTTP_METHOD: properties.Schema(
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properties.Schema.STRING,
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_('The HTTP method used for requests by the monitor of type '
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'HTTP.'),
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update_allowed=True
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),
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EXPECTED_CODES: properties.Schema(
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properties.Schema.STRING,
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_('The list of HTTP status codes expected in response from the '
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'member to declare it healthy.'),
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update_allowed=True
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),
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URL_PATH: properties.Schema(
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properties.Schema.STRING,
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_('The HTTP path used in the HTTP request used by the monitor to '
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'test a member health.'),
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update_allowed=True
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),
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}
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attributes_schema = {
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ADMIN_STATE_UP_ATTR: attributes.Schema(
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_('The administrative state of this health monitor.')
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),
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DELAY_ATTR: attributes.Schema(
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_('The minimum time in seconds between regular connections '
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'of the member.')
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),
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EXPECTED_CODES_ATTR: attributes.Schema(
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_('The list of HTTP status codes expected in response '
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'from the member to declare it healthy.')
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),
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HTTP_METHOD_ATTR: attributes.Schema(
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_('The HTTP method used for requests by the monitor of type HTTP.')
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),
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MAX_RETRIES_ATTR: attributes.Schema(
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_('Number of permissible connection failures before changing '
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'the member status to INACTIVE.')
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),
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TIMEOUT_ATTR: attributes.Schema(
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_('Maximum number of seconds for a monitor to wait for a '
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'connection to be established before it times out.')
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),
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TYPE_ATTR: attributes.Schema(
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_('One of predefined health monitor types.')
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),
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URL_PATH_ATTR: attributes.Schema(
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_('The HTTP path used in the HTTP request used by the monitor '
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'to test a member health.')
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),
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TENANT_ID: attributes.Schema(
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_('Tenant owning the health monitor.')
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),
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SHOW: attributes.Schema(
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_('All attributes.')
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),
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}
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def handle_create(self):
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properties = self.prepare_properties(
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self.properties,
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self.physical_resource_name())
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health_monitor = self.neutron().create_health_monitor(
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{'health_monitor': properties})['health_monitor']
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self.resource_id_set(health_monitor['id'])
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def _show_resource(self):
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return self.neutron().show_health_monitor(
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self.resource_id)['health_monitor']
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if prop_diff:
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self.neutron().update_health_monitor(
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self.resource_id, {'health_monitor': prop_diff})
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def handle_delete(self):
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try:
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self.neutron().delete_health_monitor(self.resource_id)
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except Exception as ex:
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self.client_plugin().ignore_not_found(ex)
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else:
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return True
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class Pool(neutron.NeutronResource):
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"""
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A resource for managing load balancer pools in Neutron.
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"""
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PROPERTIES = (
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PROTOCOL, SUBNET_ID, SUBNET, LB_METHOD, NAME, DESCRIPTION,
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ADMIN_STATE_UP, VIP, MONITORS,
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) = (
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'protocol', 'subnet_id', 'subnet', 'lb_method', 'name', 'description',
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'admin_state_up', 'vip', 'monitors',
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)
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_VIP_KEYS = (
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VIP_NAME, VIP_DESCRIPTION, VIP_SUBNET, VIP_ADDRESS,
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VIP_CONNECTION_LIMIT, VIP_PROTOCOL_PORT,
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VIP_SESSION_PERSISTENCE, VIP_ADMIN_STATE_UP,
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) = (
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'name', 'description', 'subnet', 'address',
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'connection_limit', 'protocol_port',
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'session_persistence', 'admin_state_up',
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)
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_VIP_SESSION_PERSISTENCE_KEYS = (
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VIP_SESSION_PERSISTENCE_TYPE, VIP_SESSION_PERSISTENCE_COOKIE_NAME,
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) = (
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'type', 'cookie_name',
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)
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ATTRIBUTES = (
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ADMIN_STATE_UP_ATTR, NAME_ATTR, PROTOCOL_ATTR, SUBNET_ID_ATTR,
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LB_METHOD_ATTR, DESCRIPTION_ATTR, TENANT_ID, VIP_ATTR,
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) = (
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'admin_state_up', 'name', 'protocol', 'subnet_id',
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'lb_method', 'description', 'tenant_id', 'vip',
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)
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properties_schema = {
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PROTOCOL: properties.Schema(
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properties.Schema.STRING,
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_('Protocol for balancing.'),
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required=True,
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constraints=[
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constraints.AllowedValues(['TCP', 'HTTP', 'HTTPS']),
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]
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),
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SUBNET_ID: properties.Schema(
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properties.Schema.STRING,
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support_status=support.SupportStatus(
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status=support.DEPRECATED,
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message=_('Use property %s.') % SUBNET,
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version='2014.2'),
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constraints=[
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constraints.CustomConstraint('neutron.subnet')
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]
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),
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SUBNET: properties.Schema(
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properties.Schema.STRING,
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_('The subnet for the port on which the members '
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'of the pool will be connected.'),
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support_status=support.SupportStatus(version='2014.2'),
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constraints=[
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constraints.CustomConstraint('neutron.subnet')
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]
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),
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LB_METHOD: properties.Schema(
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properties.Schema.STRING,
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_('The algorithm used to distribute load between the members of '
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'the pool.'),
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required=True,
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constraints=[
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constraints.AllowedValues(['ROUND_ROBIN',
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'LEAST_CONNECTIONS', 'SOURCE_IP']),
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],
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update_allowed=True
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),
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NAME: properties.Schema(
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properties.Schema.STRING,
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_('Name of the pool.')
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),
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DESCRIPTION: properties.Schema(
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properties.Schema.STRING,
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_('Description of the pool.'),
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update_allowed=True
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),
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ADMIN_STATE_UP: properties.Schema(
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properties.Schema.BOOLEAN,
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_('The administrative state of this pool.'),
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default=True,
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update_allowed=True
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),
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VIP: properties.Schema(
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properties.Schema.MAP,
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_('IP address and port of the pool.'),
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schema={
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VIP_NAME: properties.Schema(
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properties.Schema.STRING,
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_('Name of the vip.')
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),
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VIP_DESCRIPTION: properties.Schema(
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properties.Schema.STRING,
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_('Description of the vip.')
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),
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VIP_SUBNET: properties.Schema(
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properties.Schema.STRING,
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_('Subnet of the vip.'),
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constraints=[
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constraints.CustomConstraint('neutron.subnet')
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]
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),
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VIP_ADDRESS: properties.Schema(
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properties.Schema.STRING,
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_('IP address of the vip.')
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),
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VIP_CONNECTION_LIMIT: properties.Schema(
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properties.Schema.INTEGER,
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_('The maximum number of connections per second '
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'allowed for the vip.')
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),
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VIP_PROTOCOL_PORT: properties.Schema(
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properties.Schema.INTEGER,
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_('TCP port on which to listen for client traffic '
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'that is associated with the vip address.'),
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required=True
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),
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VIP_SESSION_PERSISTENCE: properties.Schema(
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properties.Schema.MAP,
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_('Configuration of session persistence.'),
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schema={
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VIP_SESSION_PERSISTENCE_TYPE: properties.Schema(
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properties.Schema.STRING,
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_('Method of implementation of session '
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'persistence feature.'),
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required=True,
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constraints=[constraints.AllowedValues(
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['SOURCE_IP', 'HTTP_COOKIE', 'APP_COOKIE']
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)]
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),
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VIP_SESSION_PERSISTENCE_COOKIE_NAME: properties.Schema(
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properties.Schema.STRING,
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_('Name of the cookie, '
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'required if type is APP_COOKIE.')
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)
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}
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),
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VIP_ADMIN_STATE_UP: properties.Schema(
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properties.Schema.BOOLEAN,
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_('The administrative state of this vip.'),
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default=True
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),
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},
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required=True
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),
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MONITORS: properties.Schema(
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properties.Schema.LIST,
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_('List of health monitors associated with the pool.'),
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default=[],
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update_allowed=True
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),
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}
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attributes_schema = {
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ADMIN_STATE_UP_ATTR: attributes.Schema(
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_('The administrative state of this pool.')
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),
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NAME_ATTR: attributes.Schema(
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_('Name of the pool.')
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),
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PROTOCOL_ATTR: attributes.Schema(
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_('Protocol to balance.')
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),
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SUBNET_ID_ATTR: attributes.Schema(
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_('The subnet for the port on which the members of the pool '
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'will be connected.')
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),
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LB_METHOD_ATTR: attributes.Schema(
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_('The algorithm used to distribute load between the members '
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'of the pool.')
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),
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DESCRIPTION_ATTR: attributes.Schema(
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_('Description of the pool.')
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),
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TENANT_ID: attributes.Schema(
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_('Tenant owning the pool.')
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),
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VIP_ATTR: attributes.Schema(
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_('Vip associated with the pool.')
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),
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}
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def validate(self):
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res = super(Pool, self).validate()
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if res:
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return res
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self._validate_depr_property_required(
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self.properties, self.SUBNET, self.SUBNET_ID)
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session_p = self.properties[self.VIP].get(self.VIP_SESSION_PERSISTENCE)
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if session_p is None:
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# session persistence is not configured, skip validation
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return
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persistence_type = session_p[self.VIP_SESSION_PERSISTENCE_TYPE]
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if persistence_type == 'APP_COOKIE':
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if session_p.get(self.VIP_SESSION_PERSISTENCE_COOKIE_NAME):
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return
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msg = _('Property cookie_name is required, when '
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'session_persistence type is set to APP_COOKIE.')
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raise exception.StackValidationFailed(message=msg)
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def handle_create(self):
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properties = self.prepare_properties(
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self.properties,
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self.physical_resource_name())
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self.client_plugin().resolve_subnet(
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properties, self.SUBNET, 'subnet_id')
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vip_properties = properties.pop(self.VIP)
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monitors = properties.pop(self.MONITORS)
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client = self.neutron()
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pool = client.create_pool({'pool': properties})['pool']
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self.resource_id_set(pool['id'])
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for monitor in monitors:
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client.associate_health_monitor(
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pool['id'], {'health_monitor': {'id': monitor}})
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vip_arguments = self.prepare_properties(
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vip_properties,
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'%s.vip' % (self.name,))
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session_p = vip_arguments.get(self.VIP_SESSION_PERSISTENCE)
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if session_p is not None:
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prepared_props = self.prepare_properties(session_p, None)
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vip_arguments['session_persistence'] = prepared_props
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vip_arguments['protocol'] = self.properties[self.PROTOCOL]
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if vip_arguments.get(self.VIP_SUBNET) is None:
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vip_arguments['subnet_id'] = properties[self.SUBNET_ID]
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else:
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vip_arguments['subnet_id'] = self.client_plugin().resolve_subnet(
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vip_arguments, self.VIP_SUBNET, 'subnet_id')
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vip_arguments['pool_id'] = pool['id']
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vip = client.create_vip({'vip': vip_arguments})['vip']
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self.metadata_set({'vip': vip['id']})
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def _show_resource(self):
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return self.neutron().show_pool(self.resource_id)['pool']
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def check_create_complete(self, data):
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attributes = self._show_resource()
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status = attributes['status']
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if status == 'PENDING_CREATE':
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return False
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elif status == 'ACTIVE':
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vip_attributes = self.neutron().show_vip(
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self.metadata_get()['vip'])['vip']
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vip_status = vip_attributes['status']
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if vip_status == 'PENDING_CREATE':
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return False
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if vip_status == 'ACTIVE':
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return True
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if vip_status == 'ERROR':
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raise resource.ResourceInError(
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resource_status=vip_status,
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status_reason=_('error in vip'))
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raise resource.ResourceUnknownStatus(
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resource_status=vip_status,
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result=_('Pool creation failed due to vip'))
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elif status == 'ERROR':
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raise resource.ResourceInError(
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resource_status=status,
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status_reason=_('error in pool'))
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else:
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raise resource.ResourceUnknownStatus(
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resource_status=status,
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result=_('Pool creation failed'))
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if prop_diff:
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client = self.neutron()
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if self.MONITORS in prop_diff:
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monitors = set(prop_diff.pop(self.MONITORS))
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old_monitors = set(self.properties[self.MONITORS])
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for monitor in old_monitors - monitors:
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client.disassociate_health_monitor(self.resource_id,
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monitor)
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for monitor in monitors - old_monitors:
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client.associate_health_monitor(
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self.resource_id, {'health_monitor': {'id': monitor}})
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if prop_diff:
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client.update_pool(self.resource_id, {'pool': prop_diff})
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def _resolve_attribute(self, name):
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if name == self.VIP_ATTR:
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return self.neutron().show_vip(self.metadata_get()['vip'])['vip']
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return super(Pool, self)._resolve_attribute(name)
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def handle_delete(self):
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class PoolDeleteProgress(object):
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def __init__(self, val=False):
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self.pool = {'delete_called': val,
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'deleted': val}
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self.vip = {'delete_called': val,
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'deleted': val}
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if not self.resource_id:
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progress = PoolDeleteProgress(True)
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return progress
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progress = PoolDeleteProgress()
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if not self.metadata_get():
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progress.vip['delete_called'] = True
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progress.vip['deleted'] = True
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return progress
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def _delete_vip(self):
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return self._not_found_in_call(
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self.neutron().delete_vip, self.metadata_get()['vip'])
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def _check_vip_deleted(self):
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return self._not_found_in_call(
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self.neutron().show_vip, self.metadata_get()['vip'])
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def _delete_pool(self):
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return self._not_found_in_call(
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self.neutron().delete_pool, self.resource_id)
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def check_delete_complete(self, prg):
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if not prg.vip['delete_called']:
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prg.vip['deleted'] = self._delete_vip()
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prg.vip['delete_called'] = True
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return False
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if not prg.vip['deleted']:
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prg.vip['deleted'] = self._check_vip_deleted()
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return False
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if not prg.pool['delete_called']:
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prg.pool['deleted'] = self._delete_pool()
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prg.pool['delete_called'] = True
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return prg.pool['deleted']
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if not prg.pool['deleted']:
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prg.pool['deleted'] = super(Pool, self).check_delete_complete(True)
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return prg.pool['deleted']
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return True
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|
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class PoolMember(neutron.NeutronResource):
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"""
|
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A resource to handle load balancer members.
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"""
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support_status = support.SupportStatus(version='2014.1')
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PROPERTIES = (
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POOL_ID, ADDRESS, PROTOCOL_PORT, WEIGHT, ADMIN_STATE_UP,
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) = (
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'pool_id', 'address', 'protocol_port', 'weight', 'admin_state_up',
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)
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ATTRIBUTES = (
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ADMIN_STATE_UP_ATTR, TENANT_ID, WEIGHT_ATTR, ADDRESS_ATTR,
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POOL_ID_ATTR, PROTOCOL_PORT_ATTR, SHOW,
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) = (
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'admin_state_up', 'tenant_id', 'weight', 'address',
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'pool_id', 'protocol_port', 'show',
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)
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properties_schema = {
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POOL_ID: properties.Schema(
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properties.Schema.STRING,
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_('The ID of the load balancing pool.'),
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required=True,
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update_allowed=True
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),
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ADDRESS: properties.Schema(
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properties.Schema.STRING,
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_('IP address of the pool member on the pool network.'),
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required=True
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),
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PROTOCOL_PORT: properties.Schema(
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properties.Schema.INTEGER,
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_('TCP port on which the pool member listens for requests or '
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'connections.'),
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required=True,
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constraints=[
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constraints.Range(0, 65535),
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]
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),
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WEIGHT: properties.Schema(
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properties.Schema.INTEGER,
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_('Weight of pool member in the pool (default to 1).'),
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constraints=[
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constraints.Range(0, 256),
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],
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update_allowed=True
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),
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ADMIN_STATE_UP: properties.Schema(
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properties.Schema.BOOLEAN,
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_('The administrative state of the pool member.'),
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default=True
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),
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}
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attributes_schema = {
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ADMIN_STATE_UP_ATTR: attributes.Schema(
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_('The administrative state of this pool member.')
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),
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TENANT_ID: attributes.Schema(
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_('Tenant owning the pool member.')
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),
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WEIGHT_ATTR: attributes.Schema(
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_('Weight of the pool member in the pool.')
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),
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ADDRESS_ATTR: attributes.Schema(
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_('IP address of the pool member.')
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),
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POOL_ID_ATTR: attributes.Schema(
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_('The ID of the load balancing pool.')
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),
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PROTOCOL_PORT_ATTR: attributes.Schema(
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_('TCP port on which the pool member listens for requests or '
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'connections.')
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),
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SHOW: attributes.Schema(
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_('All attributes.')
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),
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}
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def handle_create(self):
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pool = self.properties[self.POOL_ID]
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client = self.neutron()
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protocol_port = self.properties[self.PROTOCOL_PORT]
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address = self.properties[self.ADDRESS]
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admin_state_up = self.properties[self.ADMIN_STATE_UP]
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weight = self.properties[self.WEIGHT]
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params = {
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'pool_id': pool,
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'address': address,
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'protocol_port': protocol_port,
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'admin_state_up': admin_state_up
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}
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if weight is not None:
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params['weight'] = weight
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member = client.create_member({'member': params})['member']
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self.resource_id_set(member['id'])
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def _show_resource(self):
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return self.neutron().show_member(self.resource_id)['member']
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if prop_diff:
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self.neutron().update_member(
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self.resource_id, {'member': prop_diff})
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def handle_delete(self):
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client = self.neutron()
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try:
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client.delete_member(self.resource_id)
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except Exception as ex:
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self.client_plugin().ignore_not_found(ex)
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else:
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return True
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class LoadBalancer(resource.Resource):
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"""
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A resource to link a neutron pool with servers.
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"""
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PROPERTIES = (
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POOL_ID, PROTOCOL_PORT, MEMBERS,
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) = (
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'pool_id', 'protocol_port', 'members',
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)
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properties_schema = {
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POOL_ID: properties.Schema(
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properties.Schema.STRING,
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_('The ID of the load balancing pool.'),
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required=True,
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update_allowed=True
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),
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PROTOCOL_PORT: properties.Schema(
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properties.Schema.INTEGER,
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_('Port number on which the servers are running on the members.'),
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required=True
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),
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MEMBERS: properties.Schema(
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properties.Schema.LIST,
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_('The list of Nova server IDs load balanced.'),
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update_allowed=True
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),
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}
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default_client_name = 'neutron'
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def handle_create(self):
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pool = self.properties[self.POOL_ID]
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client = self.neutron()
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protocol_port = self.properties[self.PROTOCOL_PORT]
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for member in self.properties[self.MEMBERS] or []:
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address = self.client_plugin('nova').server_to_ipaddress(member)
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lb_member = client.create_member({
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'member': {
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'pool_id': pool,
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'address': address,
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'protocol_port': protocol_port}})['member']
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self.data_set(member, lb_member['id'])
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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new_props = json_snippet.properties(self.properties_schema,
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self.context)
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# Valid use cases are:
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# - Membership controlled by members property in template
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# - Empty members property in template; membership controlled by
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# "updates" triggered from autoscaling group.
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# Mixing the two will lead to undefined behaviour.
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if (self.MEMBERS in prop_diff and
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(self.properties[self.MEMBERS] is not None or
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new_props[self.MEMBERS] is not None)):
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members = set(new_props[self.MEMBERS] or [])
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rd_members = self.data()
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old_members = set(six.iterkeys(rd_members))
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client = self.neutron()
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for member in old_members - members:
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member_id = rd_members[member]
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try:
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client.delete_member(member_id)
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except Exception as ex:
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self.client_plugin().ignore_not_found(ex)
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self.data_delete(member)
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pool = self.properties[self.POOL_ID]
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protocol_port = self.properties[self.PROTOCOL_PORT]
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for member in members - old_members:
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address = self.client_plugin('nova').server_to_ipaddress(
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member)
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lb_member = client.create_member({
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'member': {
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'pool_id': pool,
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'address': address,
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'protocol_port': protocol_port}})['member']
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self.data_set(member, lb_member['id'])
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def handle_delete(self):
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client = self.neutron()
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# FIXME(pshchelo): this deletes members in a tight loop,
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# so is prone to OverLimit bug similar to LP 1265937
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for member, member_id in self.data().items():
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try:
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client.delete_member(member_id)
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except Exception as ex:
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self.client_plugin().ignore_not_found(ex)
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self.data_delete(member)
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def resource_mapping():
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return {
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'OS::Neutron::HealthMonitor': HealthMonitor,
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'OS::Neutron::Pool': Pool,
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'OS::Neutron::PoolMember': PoolMember,
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'OS::Neutron::LoadBalancer': LoadBalancer,
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}
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