Charm Interface - Service Control

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Overview

This interface is used for a charm to request a restart of a service managed by another charm.

Usage

The interface provides the {relation-name}.connected state.

Requesting a restart of all remote services:

@reactive.when('service-control.connected')
def configure(service_control):
    ...
    service_control.request_restart()

Requesting a restart of a specific type of remote services:

@reactive.when('service-control.connected')
def configure(service_control):
    ...
    service_control.request_restart(service_type='neutron')

To consume this interface in your charm or layer, add the following to layer.yaml:

includes: ['interface:service-control']

and add a requires interface of type service-control to your charm or layers metadata.yaml eg:

requires:
  neutron-control:
    interface: service-control

Please report bugs on Launchpad.

For development questions please refer to the OpenStack Charm Guide.