watcher.applier.actions.migration
Module¶watcher.applier.actions.migration.
Migrate
(config, osc=None)[source]¶Bases: watcher.applier.actions.base.BaseAction
Migrates a server to a destination nova-compute host
This action will allow you to migrate a server to another compute destination host. Migration type ‘live’ can only be used for migrating active VMs. Migration type ‘cold’ can be used for migrating non-active VMs as well active VMs, which will be shut down while migrating.
The action schema is:
schema = Schema({
'resource_id': str, # should be a UUID
'migration_type': str, # choices -> "live", "cold"
'destination_node': str,
'source_node': str,
})
The resource_id is the UUID of the server to migrate.
The source_node and destination_node parameters are respectively the
source and the destination compute hostname (list of available compute
hosts is returned by this command: nova service-list --binary
nova-compute
).
Note
Nova API version must be 2.56 or above if destination_node parameter is given.
execute
()[source]¶Executes the main logic of the action
This method can be used to perform an action on a given set of input parameters to accomplish some type of operation. This operation may return a boolean value as a result of its execution. If False, this will be considered as an error and will then trigger the reverting of the actions.
Returns: | A flag indicating whether or not the action succeeded |
---|---|
Return type: | bool |
post_condition
()[source]¶Hook: called after the execution of an action
This function is called regardless of whether an action succeeded or not. So you can use it to perform cleanup operations.
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