yuqi-zhang 42c6094e3f syscontainers: add --rootfs to atomic install ...

Add --rootfs=ROOTFS to atomic install, which allows users to specify
an existing exploded container or existing rootfs location as ROOTFS.
The existing rootfs will be used as a read-only rootfs for the new
container to be installed, and therefore the new container would
only contain configuration files. (Note: currently all system
containers must have a read-only rootfs by default).

A use case for this would be using existing container's rootfs
through NFS, etc to serve as the rootfs for many containers running
the same image. This avoids duplicate storage of having a container
on each machine in a cluster.

A user can update only the remote container's config file parameters
with 'atomic update', and uninstalling a remote container does not
affect the rootfs specified in ROOTFS.

Closes: #527
Approved by: giuseppe

2016-08-12 22:07:36 +00:00

..

atomic

syscontainers: add --rootfs to atomic install

2016-08-12 22:07:36 +00:00