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|
==============
Zone migration
==============
Synopsis
--------
**display name**: ``Zone migration``
**goal**: ``hardware_maintenance``
.. watcher-term:: watcher.decision_engine.strategy.strategies.zone_migration.ZoneMigration
Requirements
------------
Metrics
*******
None
Cluster data model
******************
Default Watcher's Compute cluster data model:
.. watcher-term:: watcher.decision_engine.model.collector.nova.NovaClusterDataModelCollector
Storage cluster data model is also required:
.. watcher-term:: watcher.decision_engine.model.collector.cinder.CinderClusterDataModelCollector
Actions
*******
Default Watcher's actions:
.. list-table::
:widths: 30 30
:header-rows: 1
* - action
- description
* - ``migrate``
- .. watcher-term:: watcher.applier.actions.migration.Migrate
* - ``volume_migrate``
- .. watcher-term:: watcher.applier.actions.volume_migration.VolumeMigrate
Planner
*******
Default Watcher's planner:
.. watcher-term:: watcher.decision_engine.planner.weight.WeightPlanner
Configuration
-------------
Strategy parameters are:
======================== ======== ============= ==============================
parameter type default Value description
======================== ======== ============= ==============================
``compute_nodes`` array None Compute nodes to migrate.
``storage_pools`` array None Storage pools to migrate.
``parallel_total`` integer 6 The number of actions to be
run in parallel in total.
``parallel_per_node`` integer 2 The number of actions to be
run in parallel per compute
node.
``parallel_per_pool`` integer 2 The number of actions to be
run in parallel per storage
pool.
``priority`` object None List prioritizes instances
and volumes.
``with_attached_volume`` boolean False False: Instances will migrate
after all volumes migrate.
True: An instance will migrate
after the attached volumes
migrate.
======================== ======== ============= ==============================
The elements of compute_nodes array are:
============= ======= =============== =============================
parameter type default Value description
============= ======= =============== =============================
``src_node`` string None Compute node from which
instances migrate(mandatory).
``dst_node`` string None Compute node to which
instances migrate.
============= ======= =============== =============================
The elements of storage_pools array are:
============= ======= =============== ==============================
parameter type default Value description
============= ======= =============== ==============================
``src_pool`` string None Storage pool from which
volumes migrate(mandatory).
``dst_pool`` string None Storage pool to which
volumes migrate.
``src_type`` string None Source volume type(mandatory).
``dst_type`` string None Destination volume type
(mandatory).
============= ======= =============== ==============================
The elements of priority object are:
================ ======= =============== ======================
parameter type default Value description
================ ======= =============== ======================
``project`` array None Project names.
``compute_node`` array None Compute node names.
``storage_pool`` array None Storage pool names.
``compute`` enum None Instance attributes.
|compute|
``storage`` enum None Volume attributes.
|storage|
================ ======= =============== ======================
.. |compute| replace:: ["vcpu_num", "mem_size", "disk_size", "created_at"]
.. |storage| replace:: ["size", "created_at"]
Efficacy Indicator
------------------
.. watcher-func::
:format: literal_block
watcher.decision_engine.goal.efficacy.specs.HardwareMaintenance.get_global_efficacy_indicator
Algorithm
---------
For more information on the zone migration strategy please refer
to: http://specs.openstack.org/openstack/watcher-specs/specs/queens/implemented/zone-migration-strategy.html
How to use it ?
---------------
.. code-block:: shell
$ openstack optimize audittemplate create \
at1 hardware_maintenance --strategy zone_migration
$ openstack optimize audit create -a at1 \
-p compute_nodes='[{"src_node": "s01", "dst_node": "d01"}]'
External Links
--------------
None
|
