Update a docker service:
docker::services {'redis_update':
  create => false,
  update => true,
  service_name => 'redis',
  replicas => '3',
}
Remove a docker service:
- 
To remove a service, add the following code to the manifest file: docker::services {'redis':
  create => false,
  ensure => 'absent',
  service_name => 'redis',
}
- 
To remove the service from a swarm, include the ensure => absent parameter and the service_name parameter.