[openstack-dev] [OpenStack][Docker] Run OpenStack Service in Docker Container

Eric Windisch ewindisch at docker.com
Mon Aug 18 20:11:48 UTC 2014

On Mon, Aug 18, 2014 at 8:49 AM, Jyoti Ranjan <jranjan at gmail.com> wrote:

> I believe that everything can not go as a dock container. For e.g.
> 1. compute nodes
> 2. baremetal provisioning
> 3. L3 router etc

Containers are a good solution for all of the above, for some value of
container. There is some terminology overloading here, however.

There are Linux namespaces, capability sets, and cgroups which may not be
appropriate for using around some workloads. These, however, are granular.
For instance, one may run a container without networking namespaces,
allowing the container to directly manipulate host networking. Such a
container would still see nothing outside its own chrooted filesystem, PID
namespace, etc.

Docker in particular offers a number of useful features around filesystem
management, images, etc. These features make it easier to deploy and manage
systems, even if many of the "Linux containers" features are disabled for
one reason or another.

Eric Windisch
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