watcher.decision_engine.strategy.strategies.zone_migration
Module¶watcher.decision_engine.strategy.strategies.zone_migration.
ActionCounter
(total_limit=6, per_pool_limit=2, per_node_limit=2)[source]¶Bases: object
Manage the number of actions in parallel
add_node
(node)[source]¶Add the number of actions on node
Parameters: | host – compute node |
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Returns: | True if action can be added, False otherwise |
add_pool
(pool)[source]¶Increment the number of actions on host and total count
Parameters: | pool – storage pool |
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Returns: | True if incremented, False otherwise |
is_node_max
(node)[source]¶Check if per node count reached limit
Returns: | True if count reached limit, False otherwise |
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watcher.decision_engine.strategy.strategies.zone_migration.
BaseFilter
(values=[], **kwargs)[source]¶Bases: object
Base class for Filter
watcher.decision_engine.strategy.strategies.zone_migration.
ComputeHostSortFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.SortMovingToFrontFilter
watcher.decision_engine.strategy.strategies.zone_migration.
ComputeSpecSortFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.BaseFilter
get_disk_size
(item, flavors)[source]¶Get disk size of item
Parameters: |
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Returns: | disk size of item |
get_mem_size
(item, flavors)[source]¶Get memory size of item
Parameters: |
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Returns: | memory size of item |
watcher.decision_engine.strategy.strategies.zone_migration.
ProjectSortFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.SortMovingToFrontFilter
ComputeHostSortFilter
watcher.decision_engine.strategy.strategies.zone_migration.
SortMovingToFrontFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.BaseFilter
This is to move to front if a condition is True
watcher.decision_engine.strategy.strategies.zone_migration.
StorageHostSortFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.SortMovingToFrontFilter
StoragehostSortFilter
watcher.decision_engine.strategy.strategies.zone_migration.
StorageSpecSortFilter
(values=[], **kwargs)[source]¶Bases: watcher.decision_engine.strategy.strategies.zone_migration.BaseFilter
watcher.decision_engine.strategy.strategies.zone_migration.
ZoneMigration
(config, osc=None)[source]¶Bases: watcher.decision_engine.strategy.strategies.base.ZoneMigrationBaseStrategy
Zone migration using instance and volume migration
This is zone migration strategy to migrate many instances and volumes efficiently with minimum downtime for hardware maintenance.
filtered_targets
()[source]¶Filter targets
prioritize instances and volumes based on priorities from input parameters.
Returns: | prioritized targets |
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get_dst_node
(src_node)[source]¶Get destination node from self.migration_compute_nodes
Parameters: | src_node – compute node name |
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Returns: | destination node name |
get_dst_pool_and_type
(src_pool, src_type)[source]¶Get destination pool and type from self.migration_storage_pools
Parameters: |
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Returns: | set of storage pool name and volume type name |
get_host_by_pool
(pool)[source]¶Get host name from pool name
Utility method to get host name from pool name which is formatted as host@backend#pool.
Parameters: | pool – pool name |
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Returns: | host name |
get_instances
()[source]¶Get migrate target instances
Returns: | instance list on src nodes and compute scope |
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get_priority_filter_list
()[source]¶Get priority filters
Returns: | list of filter object with arguments in self.priority |
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get_priority_filter_map
()[source]¶Get priority filter map
Returns: | filter map key is the key in priority input parameters. value is filter class for prioritizing. |
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get_schema
()[source]¶Defines a Schema that the input parameters shall comply to
Returns: | A jsonschema format (mandatory default setting) |
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Return type: | dict |
get_volumes
()[source]¶Get migrate target volumes
Returns: | volume list on src pools and storage scope |
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