The watcher.applier.actions.change_node_power_state Module¶

class watcher.applier.actions.change_node_power_state.ChangeNodePowerState(config, osc=None)[source]¶

Bases: watcher.applier.actions.base.BaseAction

Compute node power on/off

By using this action, you will be able to on/off the power of a compute node.

The action schema is:

schema = Schema({
 'resource_id': str,
 'state': str,
})

The resource_id references a ironic node id (list of available ironic node is returned by this command: ironic node-list). The state value should either be on or off.

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

get_description()[source]¶

Description of the action

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.

pre_condition()[source]¶

Hook: called before the execution of an action

This method can be used to perform some initializations or to make some more advanced validation on its input parameters. So if you wish to block its execution based on this factor, raise the related exception.

revert()[source]¶

Revert this action

This method should rollback the resource to its initial state in the event of a faulty execution. This happens when the action raised an exception during its execute().

class watcher.applier.actions.change_node_power_state.NodeState[source]¶

Bases: enum.Enum