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    New Rust Xen guest tools

    Scheduled Pinned Locked Moved Development
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    • J Offline
      john.c
      last edited by john.c

      @yann Though the deb822 format allows for that file in sources format, to have the signing key tied to that file’s specified repositories. Very important as it ensures that the key is only used by that repository, unless otherwise specified. The old format typically tends to apply that key to all repositories. So even repositories which shouldn’t use it could, worse the key was trusted for all repositories by the client.

      In the new format the repositories can have the specific key tied to them, on the client side as well as the server side.

      yannY 1 Reply Last reply Reply Quote 1
      • yannY Offline
        yann Vates 🪐 XCP-ng Team @john.c
        last edited by

        @john.c OK, that will be useful when the repo is signed, but for now I don't see what adverse effect it can have. Do I miss something?

        Also we try to avoid breaking support for older OS versions, so we'll likely continue to advertise the old format for older versions of Debian.

        J 1 Reply Last reply Reply Quote 0
        • J Offline
          john.c @yann
          last edited by john.c

          @yann said in New Rust Xen guest tools:

          @john.c OK, that will be useful when the repo is signed, but for now I don't see what adverse effect it can have. Do I miss something?

          Also we try to avoid breaking support for older OS versions, so we'll likely continue to advertise the old format for older versions of Debian.

          @yann From Debian 13.0.0 (code name Trixie) having repository signing is mandatory. Without it apt will straight refuse to install, update or upgrade its packages.

          Also doing with deb822 format will help to protect the GPG Key, used by Vates from abuse by another repository. Especially if that repository is hosting malware laden deb packages. As only the Vates repository can then use that signing key, as defined in the sources file.

          Refusing to install, update or upgrade is an adverse effect wouldn’t you say?

          1 Reply Last reply Reply Quote 0
          • DustyArmstrongD Offline
            DustyArmstrong @dClauzel
            last edited by

            Testing the agent out on Arch Linux (mainly due to the spotty 'support' in the AUR/generally) and it is working fine - better than what I had before (which did not report VM info properly). I've set it up as a systemd service to replace the previous one I had, also working as expected.

            This would be fun to contribute towards.

            1 Reply Last reply Reply Quote 1
            • Tristis OrisT Offline
              Tristis Oris Top contributor
              last edited by

              Not sure is it an issue. Agent itself is working.

              Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.14.0-37-generic x86_64)

              systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
     Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-02-09 14:28:41 MSK; 36min ago
   Main PID: 959 (xen-guest-agent)
      Tasks: 17 (limit: 19041)
     Memory: 4.8M (peak: 6.7M)
        CPU: 76ms
     CGroup: /system.slice/xen-guest-agent.service
             └─959 /usr/sbin/xen-guest-agent

Feb 09 14:28:41 oris systemd[1]: Started xen-guest-agent.service - Xen guest agent.
Feb 09 14:28:41 oris xen-guest-agent[959]: cannot parse yet os version Custom("24.04")

              Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.17.0-14-generic x86_64)

              systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
     Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-02-09 15:04:31 MSK; 1s ago
   Main PID: 9058 (xen-guest-agent)
      Tasks: 17 (limit: 76999)
     Memory: 2.5M (peak: 4.7M)
        CPU: 32ms
     CGroup: /system.slice/xen-guest-agent.service
             └─9058 /usr/sbin/xen-guest-agent

Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
              J 1 Reply Last reply Reply Quote 0
              • olivierlambertO Offline
                olivierlambert Vates 🪐 Co-Founder CEO
                last edited by

                Question for @yann or @teddyastie I assume

                1 Reply Last reply Reply Quote 0
                • J Offline
                  john.c @Tristis Oris
                  last edited by

                  @Tristis-Oris said in New Rust Xen guest tools:

                  Not sure is it an issue. Agent itself is working.

                  Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.14.0-37-generic x86_64)

                  systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
     Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-02-09 14:28:41 MSK; 36min ago
   Main PID: 959 (xen-guest-agent)
      Tasks: 17 (limit: 19041)
     Memory: 4.8M (peak: 6.7M)
        CPU: 76ms
     CGroup: /system.slice/xen-guest-agent.service
             └─959 /usr/sbin/xen-guest-agent

Feb 09 14:28:41 oris systemd[1]: Started xen-guest-agent.service - Xen guest agent.
Feb 09 14:28:41 oris xen-guest-agent[959]: cannot parse yet os version Custom("24.04")

                  Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.17.0-14-generic x86_64)

                  systemctl status xen-guest-agent
● xen-guest-agent.service - Xen guest agent
     Loaded: loaded (/usr/lib/systemd/system/xen-guest-agent.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-02-09 15:04:31 MSK; 1s ago
   Main PID: 9058 (xen-guest-agent)
      Tasks: 17 (limit: 76999)
     Memory: 2.5M (peak: 4.7M)
        CPU: 32ms
     CGroup: /system.slice/xen-guest-agent.service
             └─9058 /usr/sbin/xen-guest-agent

Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240
Feb 09 15:04:31 k3s xen-guest-agent[9058]: Specified IFLA_INET6_CONF NLA attribute holds more(most likely new kernel) data which is unknown to netlink-packet-route crate, expecting 236, got 240

                  Is this a graphical (desktop) based VM running the agent?

                  @olivierlambert If his VM is a desktop graphical Ubuntu then, it’s Kernel will be regularly updated with each new standard lifecycle point be an upgraded HWE kernel. So will be frequently getting this message, new info in the kernel. HWE kernels are default in modern Ubuntu desktop environments!

                  Tristis OrisT 1 Reply Last reply Reply Quote 0
                  • Tristis OrisT Offline
                    Tristis Oris Top contributor @john.c
                    last edited by

                    @john.c server, no UI.

                    yannY 1 Reply Last reply Reply Quote 0
                    • yannY Offline
                      yann Vates 🪐 XCP-ng Team @Tristis Oris
                      last edited by

                      @Tristis-Oris yes it is likely you're using a newer kernel, we likely need to rebuild the agent using a newer version of the netlink crate.

                      1 Reply Last reply Reply Quote 1
                      • A Offline
                        Andrew Top contributor @olivierlambert
                        last edited by

                        @olivierlambert Error causes tools to fail to load... >256 IP addresses on an interface (IPv4 and IPv6):

                        xen-guest-agent[514]: Error: Custom { kind: OutOfMemory, error: "no free slot for a new IP address" }

                        Best is to account for all the IP addresses.... second best is to ignore the extra IP addresses and not fail and exit.

                        1 Reply Last reply Reply Quote 0
                        • olivierlambertO Offline
                          olivierlambert Vates 🪐 Co-Founder CEO
                          last edited by

                          Ping @teddyastie

                          1 Reply Last reply Reply Quote 0

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