PcPh22

@ 1.0 container Instance DomainOne instance per running container.  The external instance identifier
is the unique container identification string for each container.
@ containers.engine technology backing each container (e.g. docker)
@ containers.name mapping of unique container IDs to human-readable names
@ containers.pid process identifier for each containers initial process
@ containers.state.running this container is currently running (one/zero)
@ containers.state.paused this container is currently paused (one/zero)
@ containers.state.restarting this container is restarting (one/zero)
@ containers.cgroup path mapping container names to their cgroups