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    Experimental update of CentOS packages

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    • olivierlambertO
      olivierlambert Vates πŸͺ Co-Founder🦸 CEO πŸ§‘β€πŸ’Ό
      last edited by

      Fixing CVE on non-updated packages of CentOS 7.2 in XCP-ng (like openssh-server or other critical CVEs on samba)

      1 Reply Last reply Reply Quote 1
      • C
        cheese
        last edited by

        How XCP-ng keep tracking of rebuild due to updated of dependency? That means if A requires B, and B is updated. How XCP-np decides whether and when to rebuild A?

        1 Reply Last reply Reply Quote 0
        • stormiS
          stormi Vates πŸͺ XCP-ng Team πŸš€
          last edited by

          Red Hat (and thus CentOS) tries not to make changes to libraries that would then require rebuilding other packages, so usually there's no need to rebuild packages in cascade when updating packages from CentOS 7.

          Otherwise we've got the build dependencies in source RPMs.

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          • michaelM
            michael
            last edited by

            Updating one of my test servers now. (Dell R610)

            If all goes well, I will update another test server (Dell R620) later this week.

            1 Reply Last reply Reply Quote 2
            • michaelM
              michael
              last edited by

              So far I have run into one issue. When I force a live migration the VM I migrate gets stuck at 99% and sits there. I let it sit overnight to see if it would go through, but it didn't .

              When attempting to cancel the migration it left a copy of the VM frozen on each host. When attempting to reboot/shutdown or even force reboot/shutdown I would get an error saying they did not exist.

              Rebooting the hosts fixed the this issue, but left me with a full copy of the VMs on each host. I was also unable to reboot the host I migrated the VM from unless I used the xsconsole window. XCP-NG Center did not work.

              If I get time today I will roll back the R610 to 7.6 and see if I have the same results.

              Here are a few photos: https://imgur.com/a/wYw6AdL

              Other than this edge case issue, everything seems to be working fine so far!

              1 Reply Last reply Reply Quote 0
              • stormiS
                stormi Vates πŸͺ XCP-ng Team πŸš€
                last edited by

                The live migration issue may, or not, be related to this: https://xcp-ng.org/forum/topic/522/unable-to-migrate-live-vms-after-upgrading-from-xcp-ng-7-4-to-7-5/

                michaelM 1 Reply Last reply Reply Quote 0
                • michaelM
                  michael @stormi
                  last edited by

                  @stormi

                  Do you have any suggestions for me to try to help see if this is related?

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                  • stormiS
                    stormi Vates πŸͺ XCP-ng Team πŸš€
                    last edited by

                    Yes, you could install emu-manager from XenServer 7.6 (present on their installation ISO) and see if live migration works better (note that reproducing the issue may depend on VM load or other factors, so if it does migrate well, try several times to confirm the result).

                    Once you've got the RPM:

                    rpm -e --nodeps xcp-emu-manager
                    yum install emu-manager-version_and_such.rpm
                    xe-toolstack-restart # may not be needed but doesn't hurt
                    
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                    • michaelM
                      michael
                      last edited by

                      This fixed the issue for a few migrations. The latest one put the VM into a suspended mode and then disconnected me from the host. I restarted the tool-stack on each host and when I went to reconnect to the host I was migrating the VM from it would let me in for a moment and then kick me out again and it was in a maintence mode according to the icon. To resolve this I rebooted the host. I'm currently seeing if I can replicate this behavior.

                      Other than this I haven't run into any issues so far.

                      Let me know if there is anything specific you would like tested.

                      1 Reply Last reply Reply Quote 0
                      • F
                        fibrewire
                        last edited by

                        i know this topic is old, but is this still going on? I would like to participate.

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                        • olivierlambertO
                          olivierlambert Vates πŸͺ Co-Founder🦸 CEO πŸ§‘β€πŸ’Ό
                          last edited by

                          Problem is considered solved now.

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                          • stormiS
                            stormi Vates πŸͺ XCP-ng Team πŸš€
                            last edited by stormi

                            Since I started this topic, XCP-ng version 8.0 came with updated CentOS packages (to CentOS 7.5). Now the versions remain stable but I'm regularly checking CentOS security updates for important updates that may be necessary to us.

                            N 1 Reply Last reply Reply Quote 0
                            • N
                              nackstein @stormi
                              last edited by

                              @stormi I have a doubt, you say that XCP-ng 8.0 comes with packages updated to CentOS 7.5 plus some custom package like kernel.
                              If I update the host via yum it goes to the latest CentOS 7.x version plus latest updates, I'm right?
                              I don't see any yum settings that keep it stuck to 7.5.
                              I mean, the updates repo have this source:
                              mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
                              and $releasever = 7 widhtout any minor release specification, so I assume an update takes my base OS to the latest minor plus updates.

                              stormiS 1 Reply Last reply Reply Quote 0
                              • stormiS
                                stormi Vates πŸͺ XCP-ng Team πŸš€ @nackstein
                                last edited by

                                @nackstein If you update to latest CentOS you probably basically just break your system. The CentOS repos are not active by default on purpose. We let them as a convenience for those who really really need to (and understand the risk) to cherry-pick additional software that we don't offer in our own repos.

                                N 1 Reply Last reply Reply Quote 1
                                • stormiS
                                  stormi Vates πŸͺ XCP-ng Team πŸš€
                                  last edited by

                                  See also https://github.com/xcp-ng/xcp/wiki/Additional-packages

                                  1 Reply Last reply Reply Quote 0
                                  • N
                                    nackstein @stormi
                                    last edited by

                                    @stormi enabled=0, didn't see it! thanks πŸ‘

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