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    Remove a host from a pool

    Scheduled Pinned Locked Moved Management
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    • mauzillaM Offline
      mauzilla @olivierlambert
      last edited by

      @olivierlambert I noted now when removing the host that is says it removes all VM's from the local storage and reboots. When you add the host to a pool, you can simply shutdown all VM's on the host, why does it remove vm's if you want to remove the host from a pool?

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      • olivierlambertO Offline
        olivierlambert Vates 🪐 Co-Founder CEO
        last edited by

        Because it will create a fresh XAPI database. It doesn't know how to "extract" records that are specific to a host.

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        • D Offline
          dalat9181
          last edited by

          How long does it takes for the host to be remove from the pool?

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          • olivierlambertO Offline
            olivierlambert Vates 🪐 Co-Founder CEO
            last edited by

            Something like between 10 and 30 seconds in average.

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            • D Offline
              dalat9181 @olivierlambert
              last edited by

              @olivierlambert
              I migrate all the vm of the host server.
              put it in maintained mode
              and detach it. But it have spinning for about an hour or now.
              The reason I want to detach it so I can re-install xcp-ng with ext storage instead of LVM.

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              • olivierlambertO Offline
                olivierlambert Vates 🪐 Co-Founder CEO
                last edited by

                There's no need to reinstall to do this 🤔

                Just remove the LVM SR, recreate it in ext and that's it.

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                • D Offline
                  dalat9181 @olivierlambert
                  last edited by

                  @olivierlambert
                  Thanks Oliver!
                  Is there a document for this?

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                  • olivierlambertO Offline
                    olivierlambert Vates 🪐 Co-Founder CEO
                    last edited by

                    To destroy the SR and recreate it?

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                    • D Offline
                      dalat9181 @olivierlambert
                      last edited by

                      @olivierlambert
                      Hi Oliver,
                      yes. I was just wondering if you have an official doc for it. But I did google on how to do this and will try it out.
                      Thanks

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                      • olivierlambertO Offline
                        olivierlambert Vates 🪐 Co-Founder CEO
                        last edited by

                        In XO, it's pretty straightforward: Home/SR, delete the SR. Then, New/SR and recreate it 🙂

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                        • K Offline
                          kevdog @tjkreidl
                          last edited by

                          @tjkreidl

                          So here is the dilemma I'm running into, the host I added with the incorrect network ports and such. It was reachable via the internet until I upgraded some pool patches, now its extremely unreachable. I can boot the installation, however I can't reach the slave to eject the host.

                          I tried emergency resetting network, however that didn't work either.

                          lshw -C network reveals a lot of unclaimed ethernet controllers which are the Intel 225-V version. I looked up various internet resources to see what "unclaimed" meant, and these sources suggest there isn't an appropriate driver -- which is weird since prior to the pool patches applied this installation was up and running (but misconfigured).

                          Sooo -- I either have two options at this point, and I don't really care. I'd like to eject this pool member -- destroy it -- however it seems I can't since it's unreachable, or I need to reinstall the I225V network driver.

                          Any suggestions?

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                          • tjkreidlT Offline
                            tjkreidl Ambassador @kevdog
                            last edited by

                            @kevdog You can force a host to be ejected even if the host is not reachable any longer from the pool master using:
                            xe host-forget uuid=UUID
                            If there is any issue because VMs are thought to be running still on that host,
                            you may need to do a power state reset on such before you can get rid of that host.
                            See if that works for you.

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