Great timing for this thread! I have been working on this for the past few months and here is what I am doing and would be nice if docker was supported straight way in Mesos. So here goes the features that I would personally love to see in Mesos Core from the perspective of an user which I had to implement on my own -
a. Mesos understanding docker metrics which should be straightforward because docker writes all its metrics in the following fashin for cpu, blkio, memory etc - /sys/fs/cgroup/cpu/docker/<conntainerid> I am sending all these metrics right now as a framework message back to my framework/scheduler but it would be cool if Mesos took care of them. b. Easier way to map tasks to docker containers, probably the external containerizer takes care of it to a large extent. It would be helpful if there was a blog about it's API and internals by the core committers explaining the design. Even a simple example in the mesos codebase using the external containerizer would help. c. stdout and stderr of docker containers in the Mesos task stdout and stderr logs. Does the external containerizer already takes care of it? I had to write a service which runs on every slave for exposing the container logs to an user. d. Mesos GC of tasks taking care of cleaning up docker containers which have terminated. Right now the way I implemented this is that the service which exposes the logs of a container also listens to docker events and when a container exits, it knows that this has to be cleaned up and so removes it after a fixed amount of time[configurable through a Rest API/config file] e. Translate all task constraints to docker run flags. This is probably the easiest and I know it's super easy to implement with the external containerizer. On Fri, Jun 20, 2014 at 3:40 PM, Tobias Knaup <[email protected]> wrote: > Hi all, > > We've got a lot of feedback from folks who use Mesos to run Dockers at > scale via Deimos, and the main wish was to make Docker a first class > citizen in Mesos, instead of a plugin that needs to be installed > separately. Mesosphere wants to contribute this and I already chatted with > Ben H about what an implementation could look like. > > I'd love for folks on here that are working with Docker to chime in! > I created a JIRA here: https://issues.apache.org/jira/browse/MESOS-1524 > > Cheers, > > Tobi > -- Thanks, Diptanu Choudhury Web - www.linkedin.com/in/diptanu Twitter - @diptanu <http://twitter.com/diptanu>
