145 lines
4.8 KiB
Plaintext
145 lines
4.8 KiB
Plaintext
..
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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Generated using plantuml.
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@startuml
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title live-migration with ovs-hybrid plug : nova<->neutron interactions
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participant nova_conductor
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participant nova_compute1
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participant nova_compute2
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participant neutron_server
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participant neutron_l2_agent2
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participant neutron_l2_agent1
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participant neutron_l3_agent2
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participant neutron_l3_agent1
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nova_conductor -> nova_compute1 : live_migrate
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activate nova_compute1
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nova_compute1 -> nova_compute2 : RPC.call : pre_live_migrate()
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activate nova_compute2
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nova_compute2 -> neutron_server : REST : list_port()
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activate neutron_server
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neutron_server -> nova_compute2
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deactivate neutron_server
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group port plugged on host2
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nova_compute2 -> nova_compute2 : plug_vifs()
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activate neutron_l2_agent2
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neutron_l2_agent2 -> neutron_server : RPC.call : get_devices_details_list_and_failed_devices(devices : [port])
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activate neutron_server
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neutron_server -> neutron_l2_agent2
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deactivate neutron_server
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neutron_l2_agent2 -> neutron_server : RPC.call : update_device_list(devices_up : [port])
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activate neutron_server
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neutron_server -> neutron_l2_agent2
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deactivate neutron_server
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note over neutron_server
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port status is never
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changed since port
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is not bound to host2
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end note
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deactivate neutron_l2_agent2
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end
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nova_compute2 -> nova_compute1
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deactivate nova_compute2
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group proactive dvr router creation
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nova_compute1 -> neutron_server : REST : update_port('binding:profile'={'migrating_to':'host2'})
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activate neutron_server
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neutron_server -> neutron_l3_agent1: RPC.cast(fanout) : port_update(port)
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activate neutron_l3_agent1
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destroy neutron_l3_agent1
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note over neutron_l3_agent1
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"migrating_to" does
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not match host
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end note
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neutron_server -> neutron_l3_agent2: RPC.cast(fanout) : port_update(port)
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activate neutron_l3_agent2
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note over neutron_l3_agent2
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proactively create DVR router
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end note
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deactivate neutron_l3_agent2
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neutron_server -> nova_compute1
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deactivate neutron_server
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end
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note over nova_compute1, nova_compute2
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libvirt handles the live-migration
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end note
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note left of nova_compute1
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live migration
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succeeded
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end note
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nova_compute1 -> nova_compute1 : post_live_migration
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group port unplugged on host1
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nova_compute1 -> nova_compute1 : unplug_vifs()
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activate neutron_l2_agent1
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neutron_l2_agent1 -> neutron_server : RPC.call : update_device_list(devices_down : [port])
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activate neutron_server
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neutron_server -> neutron_server : update_port_status(DOWN)
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neutron_server -> neutron_l2_agent1
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deactivate neutron_l2_agent1
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note over neutron_server
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port status changed to
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DOWN since port is bound
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to host1
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end note
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deactivate neutron_server
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end
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nova_compute1 -> nova_compute2 : RPC.cast : post_live_migration_at_destination()
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deactivate nova_compute1
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activate nova_compute2
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nova_compute2 -> neutron_server : REST : update_port({'binding:host_id':'host2', 'binding:profile':{}})
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activate neutron_server
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neutron_server -> neutron_server : update_port_status(DOWN)
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neutron_server -> neutron_l2_agent1 : RPC.cast(fanout) : port_update(port)
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activate neutron_l2_agent1
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destroy neutron_l2_agent1
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note over neutron_l2_agent1
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port not hosted
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on host1
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end note
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neutron_server -> neutron_l2_agent2 : RPC.cast(fanout) : port_update(port)
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activate neutron_l2_agent2
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neutron_server -> nova_compute2
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deactivate nova_compute2
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deactivate neutron_server
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group port_update processed by agent that really hosts the port
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neutron_l2_agent2 -> neutron_server : RPC.call : get_devices_details_list_and_failed_devices(devices : [port])
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activate neutron_server
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neutron_server -> neutron_server : update_port_status(BUILD)
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neutron_server -> neutron_l2_agent2
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deactivate neutron_server
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neutron_l2_agent2 -> neutron_server : RPC.call : update_device_list(devices_up : [port])
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activate neutron_server
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neutron_server -> neutron_server : update_port_status(ACTIVE)
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neutron_server -> neutron_l2_agent2
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deactivate neutron_server
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note over neutron_server
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port status changed to
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ACTIVE since port
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is now bound to host2
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end note
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deactivate neutron_l2_agent2
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end group
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@enduml
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