Organize each state into a distinct function for readability and composability.
Rework `present` to create but not start containers. Add a `restarted` state
to unconditionally restart a container and a `reloaded` state to restart a
container if and only if its configuration is incorrect. Store our most recent
knowledge about container states in a ContainerSet object. Improve the value
registered by this task to include not only the inspect data from any changed
containers, but also action counters in their native form, a summary message
for all actions taken, and a `reload_reasons` key to store a human-readable
diagnostic to determine why each container was reloaded.
This allows setting the pid namespace for a container. Currently only
the 'host' pid namespace is supported.
This requires Docker 1.4.1 and docker-py 1.0.0
Don't pass the volumes_from argument to the Docker create_container method.
If the volumes_from argument is passed to the create_container method, Docker
raises the following exception:
docker.errors.DockerException: 'volumes_from' parameter has no effect on
create_container(). It has been moved to start()
Starting from docker-py>=0.5.0 it is impossible to work with private registries based on HTTP.
So we need additional parameter to allow pull from insecure registry
Related to ansible/ansible#9111
