Hi Gayan, Juju cannot operate with app containers as it operates with "os-based" systems. The difference is that Juju expects the node it spins to run a Juju agent. In the case of a Docker container, which runs a single process, that would mean the sole purpose of the container is running... Juju itself. So long for your app. So that means Juju cannot provision Docker containers "directly" (which is what you seem to expect with the provider idea).
If you want to run Docker containers via Juju, you have the following methods: * Wrap the Docker image in the charm. Essentially, the charm would then be a set of commands to run, scale, integrate... the container with the rest of the world (for example, managing the fact that the host port is not necessarily the same as the container port, or managing storage for the image and so on and so on) In this context, you would run docker images, under the form of a docker compose, on a single host. * Wrap the docker-compose in the Swarm layer: here you would do the same as above, but Juju would run at the host level of your Swarm cluster. * Create a specific charm to interact with the cluster API (k8s, Mesos, Swarm): this charm would be your deployer. It could receive hooks from the outside world, triggering deployment or other stuff. In this case, the charm can be a subordinate (running on all cluster instances), which you could potentially load balance, or a standalone service running on the side. Now, if you are looking into building a container based IaaS equivalent, I suggest you look into LXD <https://linuxcontainers.org/lxd/getting-started-cli/>, which would spin containers that look and behave like VMs. >From a Juju perspective, there is a LXD provider. The diff with Docker is that LXD doesn't natively provide image based deployment, but follows the Juju philosophy to always start with a blank image. So your charms will have to deploy the code in LXD from scratch. Additional nodes: in the docs, pick the "/devel" branch, it's better if you use Juju 2.x I hope this helps. ++ Sam -- Samuel Cozannet Cloud, Big Data and IoT Strategy Team Business Development - Cloud and ISV Ecosystem Changing the Future of Cloud Ubuntu <http://ubuntu.com> / Canonical UK LTD <http://canonical.com> / Juju <https://jujucharms.com> samuel.cozan...@canonical.com mob: +33 616 702 389 skype: samnco Twitter: @SaMnCo_23 [image: View Samuel Cozannet's profile on LinkedIn] <https://es.linkedin.com/in/scozannet> On Mon, Jun 6, 2016 at 2:36 PM, Gayan Gunarathne <csega...@gmail.com> wrote: > > Hi Charles/Samuel, > > Thanks for the information. > > What I am try to do is to run a docker compose to start docker containers > in a single machine. Still I am not clear how we can use the docker with > Juju.I am following this[1] > > Simple I need to use the Juju UI[2] and create my deployment there.Then > can I do the deployment with the docker.How can I select the docker as a > IaaS. I couldn't find the docker configuration section in > environment.yaml.I am not clear how can I provide the docker as a cloud > provider. > > [1]https://jujucharms.com/docs/stable/getting-started > [2]https://demo.jujucharms.com/ > > Thanks, > Gayan > > On Wed, Jun 1, 2016 at 3:08 AM, Samuel Cozannet < > samuel.cozan...@canonical.com> wrote: > >> And finally to add to this, there is a community effort around Mesos and >> DCOS to provide the same idea as the k8s stuff. >> >> I am also interested in your use case and feedback :) >> >> Best, >> Sam >> On May 31, 2016 7:17 PM, "Charles Butler" <charles.but...@canonical.com> >> wrote: >> >>> Greetings Gayan! >>> >>> You most certainly can compose and use a full docker-provided stack, mix >>> and match with charms - thats the power of wrapping your compose-based >>> service with layer-docker. >>> >>> https://github.com/juju-solutions/layer-docker >>> >>> Which is a great starting place for charming up your dockerized app >>> using charms.docker to lend a hand with the ops knowledge to get it running >>> :) >>> >>> https://github.com/juju-solutions/charms.docker >>> http://pythonhosted.org/charms.docker/modules.html >>> >>> There are several examples in the charm store from myself (lazypower) >>> and Matt Bruzek (mbruzek) that are docker based. I believe the most >>> straight forward example that I can illustrate today is the swarm layer, >>> which builds the swarm charm. >>> >>> https://github.com/juju-solutions/layer-swarm >>> https://jujucharms.com/u/containers/swarm-core >>> >>> This is a multi-series charm that delivers swarm via containers, >>> backended by consul or etcd as the discovery mechanism. This has a good mix >>> of relationships, base layers, top-layers (what you would be writing), and >>> uses the docker-native tooling to bring everything up with some help from >>> juju. >>> >>> There are even more complex examples, such as Kubernetes - all being >>> brought up and controlled in a similar manner >>> >>> https://github.com/kubernetes/kubernetes/tree/master/cluster/juju >>> https://jujucharms.com/u/containers/kubernetes-core >>> >>> If you need any help charming with Docker you can get in touch with >>> myself on the mailing list here, or join us on irc in #juju on >>> irc.freenode.net >>> >>> I'd love to hear any feedback/questions/comments about the developer >>> tooling we have here, as its really ramped up our capacity to churn out >>> high quality charms quickly that are docker based, and if there's any rough >>> edges we can sand out for other developers would be great starting points. >>> >>> All the best, >>> >>> Charles >>> >>> On Tue, May 31, 2016 at 9:41 AM Gayan Gunarathne <csega...@gmail.com> >>> wrote: >>> >>>> Hi Marco, >>>> >>>> Thanks for the details. >>>> >>>> Actually I just want to do something like this. Lets say I have tomcat >>>> and mysql composite application. So I need to deploy these two application >>>> in docker with depends on(I am really glad if I can use demo UI[1]). How >>>> can I do that? >>>> >>>> Do you already have charms that run in docker with the same? Can you >>>> point me to some sample? >>>> >>>> [1]https://demo.jujucharms.com/ >>>> >>>> Thanks, >>>> Gayan >>>> >>>> On Tue, May 31, 2016 at 6:52 PM, Marco Ceppi <marco.ce...@canonical.com >>>> > wrote: >>>> >>>>> Hi Gayan, >>>>> >>>>> I've added the general Juju list which covers more of these general >>>>> topics. >>>>> >>>>> So, because of the nature of LXC machines and Docker style application >>>>> containers it's hard to model that style application container in Juju in >>>>> the same way LXC machines work. However, it's quite easy to wrap something >>>>> like a Docker container, which works really well as a payload/software >>>>> delivery tool, but then you can use Juju to wrap that immutable object and >>>>> make it mutable inside of a Juju deployment. >>>>> >>>>> I know there are quite a few people on the juju mailing list doing >>>>> this today, so I'll let them weigh in. In short, yes you can use Docker >>>>> and >>>>> docker style application containers with Juju, but not in the same direct >>>>> way you would a LXC machine just because of the differences in function >>>>> and >>>>> form. >>>>> >>>>> Marco >>>>> >>>>> On Tue, May 31, 2016 at 7:09 AM Gayan Gunarathne <csega...@gmail.com> >>>>> wrote: >>>>> >>>>>> Hello, >>>>>> >>>>>> Can we run docker directly with Juju? I saw Juju is supporting the >>>>>> LXC containers. I need to know whether we can spawn docker containers as >>>>>> the same. >>>>>> >>>>>> If we support this can you point me to any document? >>>>>> >>>>>> Thanks, >>>>>> Gayan >>>>>> -- >>>>>> Juju-dev mailing list >>>>>> juju-...@lists.ubuntu.com >>>>>> Modify settings or unsubscribe at: >>>>>> https://lists.ubuntu.com/mailman/listinfo/juju-dev >>>>>> >>>>> >>>> >>>> >>>> -- >>>> Best Regards, >>>> Gayan >>>> -- >>>> Juju-dev mailing list >>>> juju-...@lists.ubuntu.com >>>> Modify settings or unsubscribe at: >>>> https://lists.ubuntu.com/mailman/listinfo/juju-dev >>>> >>> -- >>> Juju Charmer >>> Canonical Group Ltd. >>> Ubuntu - Linux for human beings | www.ubuntu.com >>> Juju - The fastest way to model your service | www.jujucharms.com >>> >>> -- >>> Juju mailing list >>> Juju@lists.ubuntu.com >>> Modify settings or unsubscribe at: >>> https://lists.ubuntu.com/mailman/listinfo/juju >>> >>> > > > -- > Best Regards, > Gayan >
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