nova/doc/source/reference/live-migration.rst
Eric Fried 6e2d001597 _rollback_live_migration in live-migration seqdiag
Add the _rollback_live_migration call on the source as the first thing
that happens on failed driver.live_migration.

Change-Id: I5db474a072ad12d48f496dcc26c99ea73c90cb66
2017-09-27 09:16:08 -05:00

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..
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.
================
Live Migration
================
.. seqdiag::
seqdiag {
Conductor; Source; Destination;
edge_length = 300;
span_height = 15;
activation = none;
default_note_color = white;
Conductor -> Destination [label = "call", note = "check_can_live_migrate_destination"];
Source <- Destination [label = "call", leftnote = "check_can_live_migrate_source"];
Source --> Destination;
Conductor <-- Destination;
Conductor ->> Source [label = "cast", note = "live_migrate"];
Source -> Destination [label = "call", note = "pre_live_migration (set up dest)"];
Source <-- Destination;
=== driver.live_migration (success) ===
Source -> Source [leftnote = "post_live_migration (clean up source)"];
Source -> Destination [label = "call", note = "post_live_migration_at_destination (finish dest)"];
Source <-- Destination;
=== driver.live_migration (failure) ===
Source -> Source [leftnote = "_rollback_live_migration"];
Source -> Destination [label = "call", note = "remove_volume_connections"];
Source <-- Destination;
Source ->> Destination [label = "cast", note = "rollback_live_migration_at_destination"];
}