<![CDATA[Docker on XCP-ng]]>I've been looking up running (more to the point, managing) Docker on XCP-ng. I currently have an Ubuntu 20.04 with Docker on it, and it works just fine. Would love to be able to manage everything from one frontend, but that might be too much of a tall order.

So, my question is, instead - what's the difference between my DIY approach, and the "Docker on XCP-ng" guide, which relies on a now defunct OS?

Many thanks

]]>https://xcp-ng.org/forum/topic/3232/docker-on-xcp-ngRSS for NodeFri, 17 Apr 2026 18:41:52 GMTMon, 29 Jun 2020 23:13:09 GMT60<![CDATA[Reply to Docker on XCP-ng on Wed, 13 Jul 2022 13:29:19 GMT]]>@ganeshb Hi, think twice before going this path, with the xcp and the ubuntu hosting the containers seems to be a very good solution.
You can make good use of xcp features as backups snapshots, if something goes wrong, you can easily restore everything. You shouldn't be accessing dom0 if you aren't 100% sure of what u doing.

I havent used in prod but the coreos + the plugin looks the most native xen docker compatibility since xenserver 7.0 (I think), which would be more towards enterprises solutions.
CoreOS is RedHat based and a bit different than Debian based.

Between Large and small prod environments I'd say you are going fine.
If you want just for a home/small lab, you can try freenas which already comes with a web dashboard.

I hope it helps

]]>https://xcp-ng.org/forum/post/51161https://xcp-ng.org/forum/post/51161Wed, 13 Jul 2022 13:29:19 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 13 Jul 2022 07:57:36 GMT]]>A reminder:

There's no host, everything is a VM.

]]>https://xcp-ng.org/forum/post/51151https://xcp-ng.org/forum/post/51151Wed, 13 Jul 2022 07:57:36 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 13 Jul 2022 07:56:57 GMT]]>@ganeshb This is NOT a good idea. In fact, that's a very bad idea for a lot of reasons.

Dom0 is already a VM, so installing Docker in there or in a "normal" guest is the same thing, except that's a bad security thing to install it inside a privileged environment.

]]>https://xcp-ng.org/forum/post/51150https://xcp-ng.org/forum/post/51150Wed, 13 Jul 2022 07:56:57 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 13 Jul 2022 05:47:46 GMT]]>@ganeshb
https://xcp-ng.org/blog/2021/09/14/runx-next-generation-secured-containers/

]]>https://xcp-ng.org/forum/post/51147https://xcp-ng.org/forum/post/51147Wed, 13 Jul 2022 05:47:46 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 13 Jul 2022 03:41:54 GMT]]>@olivierlambert @olivierlambert I want to install docker on XCP-ng. Not on the VM on top of XCP. Is there any solution to do so??? Please suggest

]]>https://xcp-ng.org/forum/post/51142https://xcp-ng.org/forum/post/51142Wed, 13 Jul 2022 03:41:54 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 12 Jul 2022 13:21:41 GMT]]>This sentence doesn't make sense. You can run Docker in any VM on top of Xen.

]]>https://xcp-ng.org/forum/post/51129https://xcp-ng.org/forum/post/51129Tue, 12 Jul 2022 13:21:41 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 12 Jul 2022 11:00:36 GMT]]>If XCP-NG doesn't support Docker, can you tell me which kernel supports Docker.

]]>https://xcp-ng.org/forum/post/51128https://xcp-ng.org/forum/post/51128Tue, 12 Jul 2022 11:00:36 GMT<![CDATA[Reply to Docker on XCP-ng on Sat, 31 Oct 2020 08:06:35 GMT]]>XO is just getting the output of the Docker plugin installed on the host. You can check that by doing the call with xe.

So the problem is more likely to be inside the plugin or the connection with the OS itself.

]]>https://xcp-ng.org/forum/post/32873https://xcp-ng.org/forum/post/32873Sat, 31 Oct 2020 08:06:35 GMT<![CDATA[Reply to Docker on XCP-ng on Fri, 30 Oct 2020 23:54:02 GMT]]>Here is my screenshot:

Screen Shot 2020-10-30 at 6.53.38 PM.png

The listed containers don't exist on the host anymore.

]]>https://xcp-ng.org/forum/post/32862https://xcp-ng.org/forum/post/32862Fri, 30 Oct 2020 23:54:02 GMT<![CDATA[Reply to Docker on XCP-ng on Fri, 30 Oct 2020 01:25:09 GMT]]>All I have is a container tab. I tried to upload a jpeg screenshot but for some reason your forums isn't taking it and I'm getting a lot of pop up errors trying to insert the image. I followed the instructions linked by @jmccoy above. I already had an existing VM. Do you have any additional instructions?

By the way -- the error on the image upload was the following:

Something went wrong installing the "sharp" module /lib64/libz.so.1: version `ZLIB_1.2.9' not found (required by /usr/share/nginx/html/forum/node_modules/sharp/build/Release/../../vendor/lib/libpng16.so.16) - Remove the "node_modules/sharp" directory then run "npm install --ignore-scripts=false --verbose" and look for errors - Consult the installation documentation at https://sharp.pixelplumbing.com/install - Search for this error at https://github.com/lovell/sharp/issues
]]>https://xcp-ng.org/forum/post/32815https://xcp-ng.org/forum/post/32815Fri, 30 Oct 2020 01:25:09 GMT<![CDATA[Reply to Docker on XCP-ng on Thu, 29 Oct 2020 13:36:23 GMT]]>You should have a Docker tab displayed, if not, the plugin isn't correctly installed.

]]>https://xcp-ng.org/forum/post/32800https://xcp-ng.org/forum/post/32800Thu, 29 Oct 2020 13:36:23 GMT<![CDATA[Reply to Docker on XCP-ng on Thu, 29 Oct 2020 13:34:08 GMT]]>@jmccoy555

I tried the method you linked to with github. I was excited at first when I saw the containers tab in the UI. Later I created a number of docker containers and such within the VM. I came back later to the XO UI and saw none of the new containers. This feature seems a little bit borked to me.

]]>https://xcp-ng.org/forum/post/32799https://xcp-ng.org/forum/post/32799Thu, 29 Oct 2020 13:34:08 GMT<![CDATA[Reply to Docker on XCP-ng on Fri, 23 Oct 2020 18:44:34 GMT]]>@jefftee https://github.com/xcp-ng/xcp/wiki/Docker-in-XCP-ng

]]>https://xcp-ng.org/forum/post/32668https://xcp-ng.org/forum/post/32668Fri, 23 Oct 2020 18:44:34 GMT<![CDATA[Reply to Docker on XCP-ng on Fri, 23 Oct 2020 17:15:09 GMT]]>I run an Ubuntu 20.04 LTS virtual machine that has all of my docker containers running... One of the containers is Portainer, which provides a nice web gui to manage the docker containers.

I see @olivierlambert mentioned a plug-in that makes the containers visible to XO. I wasn't aware such a thing exists, but I'm going to go google it now and see if I can get that working...

]]>https://xcp-ng.org/forum/post/32667https://xcp-ng.org/forum/post/32667Fri, 23 Oct 2020 17:15:09 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 21 Oct 2020 17:55:43 GMT]]>What do you mean by "natively"?

]]>https://xcp-ng.org/forum/post/32622https://xcp-ng.org/forum/post/32622Wed, 21 Oct 2020 17:55:43 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 21 Oct 2020 13:41:31 GMT]]>@olivierlambert

]]>https://xcp-ng.org/forum/post/32617https://xcp-ng.org/forum/post/32617Wed, 21 Oct 2020 13:41:31 GMT<![CDATA[Reply to Docker on XCP-ng on Wed, 21 Oct 2020 13:41:19 GMT]]>So to be clear, are there any plans as of right now to support Dockers on xcp-ng natively?

]]>https://xcp-ng.org/forum/post/32616https://xcp-ng.org/forum/post/32616Wed, 21 Oct 2020 13:41:19 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 07:30:23 GMT]]>XAPI is being modified as we speak to support storage domains.

]]>https://xcp-ng.org/forum/post/28509https://xcp-ng.org/forum/post/28509Tue, 30 Jun 2020 07:30:23 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 07:26:33 GMT]]>Stub-domains are still far from reality. Or not ? 🙂

]]>https://xcp-ng.org/forum/post/28508https://xcp-ng.org/forum/post/28508Tue, 30 Jun 2020 07:26:33 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 07:13:00 GMT]]>I would prefer dedicated domain for that. The trend is to dis-aggregate the dom0 as possible. This is the Xen way and more logical than using containers.

]]>https://xcp-ng.org/forum/post/28507https://xcp-ng.org/forum/post/28507Tue, 30 Jun 2020 07:13:00 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 07:08:32 GMT]]>There are some use cases from orchestration perspective. E.g running dom0 services in containers to enhance dom0 security or something like running rook+ceph to build HCI but its new design.

]]>https://xcp-ng.org/forum/post/28506https://xcp-ng.org/forum/post/28506Tue, 30 Jun 2020 07:08:32 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 06:50:30 GMT]]>Yeah and it doesn't make sense to run Docker in the dom0. It's dangerous (security wise) and it's already a VM. So only running Docker in a "normal" VM is making sense.

]]>https://xcp-ng.org/forum/post/28501https://xcp-ng.org/forum/post/28501Tue, 30 Jun 2020 06:50:30 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 06:41:07 GMT]]>FYI: Current XCP-ng kernel does not allow docker to run. It needs some kernel features to be enabled. Neither main kernel or kernel-alt would allow it.

]]>https://xcp-ng.org/forum/post/28500https://xcp-ng.org/forum/post/28500Tue, 30 Jun 2020 06:41:07 GMT<![CDATA[Reply to Docker on XCP-ng on Tue, 30 Jun 2020 05:29:46 GMT]]>You can have an Ubuntu OS with Docker and detected by the plugin (then containers visible from XO). However, it's pretty simple, and we don't have a high demand on that kind of stuff (for now).

Do you have a more specific use case?

]]>https://xcp-ng.org/forum/post/28494https://xcp-ng.org/forum/post/28494Tue, 30 Jun 2020 05:29:46 GMT