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    Docker on XCP-ng

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    • R
      r1 XCP-ng Team last edited by

      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.

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      • olivierlambert
        olivierlambert XCP-ng Team Admin Vates Team last edited by

        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.

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        • R
          r1 XCP-ng Team last edited by

          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.

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          • olivierlambert
            olivierlambert XCP-ng Team Admin Vates Team last edited by

            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.

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            • R
              r1 XCP-ng Team last edited by

              Stub-domains are still far from reality. Or not ? 🙂

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              • olivierlambert
                olivierlambert XCP-ng Team Admin Vates Team last edited by

                XAPI is being modified as we speak to support storage domains.

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                • D
                  dan2462 last edited by

                  So to be clear, are there any plans as of right now to support Dockers on xcp-ng natively?

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                  • D
                    dan2462 @dan2462 last edited by

                    @olivierlambert

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                    • olivierlambert
                      olivierlambert XCP-ng Team Admin Vates Team last edited by

                      What do you mean by "natively"?

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                      • J
                        jefftee last edited by

                        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...

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                        • J
                          jmccoy555 @jefftee last edited by

                          @jefftee https://github.com/xcp-ng/xcp/wiki/Docker-in-XCP-ng

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                          • K
                            kevdog @jmccoy555 last edited by kevdog

                            @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.

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                            • olivierlambert
                              olivierlambert XCP-ng Team Admin Vates Team last edited by

                              You should have a Docker tab displayed, if not, the plugin isn't correctly installed.

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                              • K
                                kevdog last edited by kevdog

                                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
                                
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                                • K
                                  kevdog @kevdog last edited by

                                  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.

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                                  • olivierlambert
                                    olivierlambert XCP-ng Team Admin Vates Team last edited by

                                    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.

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