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    IPv6 support in XCP-ng for the management interface - feedback wanted

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    • D
      Dennis 0
      last edited by

      Short format works fine 🙂

      IPv6-only server still running for almost a year now without problems.

      Not using it for anything mission critical as of yet, as installing updates is a bit "exciting" trying to combine main repo with the experimental ipv6-repo (avoid overwriting ipv6-patched packages on update) but still getting CVE's fixed from kernel etc. Haven't broken anything yet (AFAIK) - just looking forward to see this in a release.

      (+ There might be a few useful details hiding here: https://github.com/xcp-ng/xcp/issues/437 in case)

      DennisGlindhart created this issue in xcp-ng/xcp

      closed IPv6 support on host #437

      1 Reply Last reply Reply Quote 3
      • BenjiReisB
        BenjiReis Vates 🪐 XCP-ng Team
        last edited by

        Hi all! Long time no see ^^

        I'm glad to say i'm back on IPv6 and will (soon-ish) provide a new IPv6 iso to test XCP-ng with an IPv6 management interface.
        I've made some fixes to DNS management.

        Before the new ISO i'd like to support ideally DHCPv6 and autoconf.
        For now I managed to :

        • sometimes have an IP with DHCPv6 and sometimes a DNS - no gateway but it's exepected with stateless DHCPv6.
        • Have an IP with Autoconf - No Gateway & no DNS

        I'm looking for help as my field of expertise is more ocaml dev than IPv6.
        I'm thinking especially of @AtaxyaNetwork and @bnerickson that I know have more knowledge than me for IPv6. 🙂 Any help from a forum users would be greatly appreciated.

        For DHCPv6 this is the conf of dhclient:

        interface "xenbr0" {
  send fqdn.fqdn = gethostname();
  request subnet-mask, broadcast-address, time-offset, host-name, interface-mtu, dhcp6.nis-servers, dhcp6.nisp-servers, nis-domain-name, nisp-domain-name, dhcp6.sntp-servers, dhcp6.fqdn, routers, dhcp6.domain-search, dhcp6.name-servers;
}

        For Autoconf here's what's done:

        /sbin/sysctl -q -w net.ipv6.conf.xenbr0.autoconf=1
/sbin/sysctl -q -w net.ipv6.conf.xenbr0.accept_ra=1

        Am I missing something obvious? I can provide more info if requested. 🙂
        Also I can made available a test iso before the real one but it'd be really a experimental ISO.

        Thanks!

        1 Reply Last reply Reply Quote 1
        • BenjiReisB
          BenjiReis Vates 🪐 XCP-ng Team @AtaxyaNetwork
          last edited by

          @AtaxyaNetwork also, i tried to reproduce you XOA deploy issue buf failed, did you add [] around the IPv6 of your XCP-ng when filling up the deploy form?

          Thanks.

          AtaxyaNetworkA 1 Reply Last reply Reply Quote 0
          • AtaxyaNetworkA
            AtaxyaNetwork Ambassador @BenjiReis
            last edited by

            @BenjiReis Hello !
            I don't remember exactly, but I will try to retest all in the incoming days 🙂

            BenjiReisB 1 Reply Last reply Reply Quote 0
            • BenjiReisB
              BenjiReis Vates 🪐 XCP-ng Team @AtaxyaNetwork
              last edited by

              @AtaxyaNetwork there are some issues, but on XOA's side.
              For now the deploy script specifically wait for an IPv4 to complete succesfully so it won't even though the XOA VM is up and running.
              For some reason it seems the XO app is not reachable with the IPv6 address in a web browser. I'm still investigating that.

              AtaxyaNetworkA 1 Reply Last reply Reply Quote 0
              • AtaxyaNetworkA
                AtaxyaNetwork Ambassador @BenjiReis
                last edited by

                @BenjiReis Ok !
                Don't hesitate to ping me if you need help to debug the XOA side 🙂

                BenjiReisB 1 Reply Last reply Reply Quote 1
                • BenjiReisB
                  BenjiReis Vates 🪐 XCP-ng Team @AtaxyaNetwork
                  last edited by

                  @AtaxyaNetwork so infact the issue was with our IPv6 lab config (lol) so XOA is reachable in fact with an IPv6 address ahah.
                  So you can play with it.

                  Now i'm back on my DHCPv6/Autoconf/SLAAC investigations 🙂

                  BenjiReisB 1 Reply Last reply Reply Quote 0
                  • BenjiReisB
                    BenjiReis Vates 🪐 XCP-ng Team @BenjiReis
                    last edited by BenjiReis

                    Hi all!

                    8.2.1 IPv6 ISO available!

                    Here's a new ISO for IPv6 based on XCP-ng 8.2.1!
                    The ISO can be used to upgrade an existing server installed with the previous IPv6 test ISO or install a brand new XCP-ng 8.2.1 with IPv6 support on management interface.

                    A non-IPv6 8.2.0 would remain non-IPv6 after an upgrade as it's not possible to edit the management interface's primary adress type.

                    An 8.2.0 IPv6 hosts can also be upgraded via yum: yum upgrade --enablerepo=xcp-ng-updates,xcp-ng-ipv6.

                    What's new

                    • All 8.2.1 fixes
                    • Better DNS management in the case of both IPv4 and IPv6 configured on a PIF
                    • Partial support of IPv6 DHCP and autoconf

                    What to test

                    • Your daily uses of XCP-ng but with IPv6
                    • DHCP and autoconf (I have reached the limits of my knowledge so help from the community with more IPv6 expertise would be very VERY VERY helpful! :D)
                      The goal of this ISO release is mainly to get help and leads about what's missing in DHCP and Autoconf.

                    Any issue encountered (and what works fine also) can be reported in this thread.

                    Usual warning

                    This a test ISO with an experimental feature still in development.
                    IPv6 on management interface is not officially supported by XCP-ng yet and so, we do not recommend to use it for a production environment.

                    Thanks a lot for the help and I hope the ISO will work well for everyone.

                    AtaxyaNetworkA 1 Reply Last reply Reply Quote 2
                    • AtaxyaNetworkA
                      AtaxyaNetwork Ambassador @BenjiReis
                      last edited by

                      @BenjiReis Hello !
                      Thank you for the ISO !

                      I just tested the install in a VM (for the moment, soon I will have a physical machine available)

                      First review:
                      So far, the autoconf seem to be working !
                      But, during the installation, I provide a IPv6 DNS (the Cloudflare one, 2606:4700:4700::1111), but DNS is not working, as I have 1.1.1.1 in my /etc/resolv.conf
                      I don't know if is the autoconf who is pushing the 1.1.1.1 (i need to check my router first), but I think is better if when we give a DNS, it bypass the autoconf

                      More test is coming the next few day 🙂

                      (sorry if my English is a bit bad)

                      Thank you and the team for all you work !

                      BenjiReisB 1 Reply Last reply Reply Quote 2
                      • BenjiReisB
                        BenjiReis Vates 🪐 XCP-ng Team @AtaxyaNetwork
                        last edited by

                        @AtaxyaNetwork thanks for the report.

                        I reproduced the issue, for some reason at first boot XCP-ng launch an IPv4 dhclient request (even though IPv4 is not configured on the management interface...) which overrides the DNS set after the request is replied to.

                        M 1 Reply Last reply Reply Quote 1
                        • M
                          mbunkus @BenjiReis
                          last edited by mbunkus

                          @BenjiReis I've just started giving the IPv6-enabled 8.2.1 a try. Right within the first hour I've stumbled across the following two issues on an IPv6-only server:

                          Repository mirrors

                          The preconfigured repositories use mirrors.xcp-ng.org. That one returns the address of an actual mirror. And if that mirror happens not to have an IPv6 address, doing anything (e.g. yum makecache) fails.

                          Re-running it might return on with AAAA records; then it does work — or maybe it'll be another AAAA-less mirror.

                          NFS mounting via host name

                          NFS mounting doesn't work if I use a host name that has both A and AAAA records (the problem isn't the A record, though). I've tried to do this via XOA. After entering everything the list of exports available on the server is actually populated, but selecting one will result in the following error in /var/log/SMlog:

                          Jun  9 19:38:55 ul SM: [7165] ['mount.nfs', 'sweet-chili.int.bunkus.org:/srv/nfs4/home/', '/var/run/sr-mount/probe', '-o', 'soft,proto=tcp,vers=3,acdirmin=0,acdirmax=0']
Jun  9 19:38:55 ul SM: [7165] FAILED in util.pread: (rc 32) stdout: '', stderr: 'mount.nfs: Network is unreachable
Jun  9 19:38:55 ul SM: [7165] '
Jun  9 19:38:55 ul SM: [7165] Raising exception [73, NFS mount error [opterr=mount failed with return code 32]]
Jun  9 19:38:55 ul SM: [7165] lock: released /var/lock/sm/sr
Jun  9 19:38:55 ul SM: [7165] ***** generic exception: sr_probe: EXCEPTION <class 'SR.SROSError'>, NFS mount error [opterr=mount failed with return code 32]
Jun  9 19:38:55 ul SM: [7165]   File "/opt/xensource/sm/SRCommand.py", line 110, in run
Jun  9 19:38:55 ul SM: [7165]     return self._run_locked(sr)
Jun  9 19:38:55 ul SM: [7165]   File "/opt/xensource/sm/SRCommand.py", line 159, in _run_locked
Jun  9 19:38:55 ul SM: [7165]     rv = self._run(sr, target)
Jun  9 19:38:55 ul SM: [7165]   File "/opt/xensource/sm/SRCommand.py", line 332, in _run
Jun  9 19:38:55 ul SM: [7165]     txt = sr.probe()
Jun  9 19:38:55 ul SM: [7165]   File "/opt/xensource/sm/NFSSR", line 170, in probe
Jun  9 19:38:55 ul SM: [7165]     self.mount(temppath, self.remotepath)
Jun  9 19:38:55 ul SM: [7165]   File "/opt/xensource/sm/NFSSR", line 133, in mount
Jun  9 19:38:55 ul SM: [7165]     raise xs_errors.XenError('NFSMount', opterr=exc.errstr)

                          The problem here is mount.nfs -o proto=tcp. As can be seen in man 5 nfs the udp and tcp protocols only use IPv4 where as udp6 and tcp6 only use IPv6. I'm not aware of a way of saying "use TCP as the protocol, resolve the name, prefer IPv6 over IPv4", unfortunately.

                          This isn't limited to XOA, obviously; the corresponding call xe sr-probe type=nfs device-config:server=sweet-chili.int.bunkus.org device-config:serverpath=/srv/nfs4/space fails the same way.

                          One possible way of addressing this could be to resolve the host name right before constructing the mount commands & using the correct proto depending on whether the management interface is IPv6 enabled.

                          Note that using an IPv6 address instead of a host name does not work either: even though sr-create works as proto=tcp6 is used in the mount calls according to /var/log/SMlog, the later sr-create does not work with similar error messages.

                          I can file issues for both on Github, if that helps. The second one in xcp-ng/xcp, I guess, but where would I file the first one? vatesfr/xen-orchestra?

                          BenjiReisB 1 Reply Last reply Reply Quote 0
                          • BenjiReisB
                            BenjiReis Vates 🪐 XCP-ng Team @mbunkus
                            last edited by BenjiReis

                            @mbunkus thanks for the report.

                            About entering an IPv6 address for NFS in XOA: did you put the [] around the IPv6?
                            If so and it still failed you can indeed create an issue on vatesfr/xen-orchestra repo (make sure to reference this thread if you do).

                            For the rest, no need to create issues, i'm aware of them and I'll note them in our internal board for next devs. 🙂

                            Regards

                            mathieu-gillootsM 1 Reply Last reply Reply Quote 0
                            • mathieu-gillootsM
                              mathieu-gilloots @BenjiReis
                              last edited by

                              Thanks for your work ! 🙂
                              I'm little new in xcp-ng, I was on xen few year ago.

                              I'm trying xcp-ng with an ipv6 only server.
                              ISO file is Ok for install.
                              Just a little thing, mirrors of packages don't all have an ipv6 record, and on a ipv6 installation I have some error.

                              I just change the file /etc/yum.repos.d/xcp-ng.repo :
                              Before :

                              ...
baseurl=http://mirrors.xcp-ng.org/8/8.2/base/x86_64/ http://updates.xcp-ng.org/8/8.2/base/x86_64/
...

                              After :

                              ...
baseurl=https://updates.xcp-ng.org/8/8.2/base/x86_64/
...

                              Regards

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

                                Hey good catch! Let me check and fix that ASAP!

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

                                  Are you sure about this? 🤔

                                  olivier@test:~$ ping mirrors.xcp-ng.org
PING mirrors.xcp-ng.org(alpha.xcp-ng.org (2a01:240:ab08:2::2)) 56 data bytes
64 bytes from alpha.xcp-ng.org (2a01:240:ab08:2::2): icmp_seq=1 ttl=63 time=0.386 ms
64 bytes from alpha.xcp-ng.org (2a01:240:ab08:2::2): icmp_seq=2 ttl=63 time=0.264 ms
^C
--- mirrors.xcp-ng.org ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.264/0.325/0.386/0.061 ms

olivier@test:~$ ping updates.xcp-ng.org
PING updates.xcp-ng.org(alpha.xcp-ng.org (2a01:240:ab08:2::2)) 56 data bytes
64 bytes from alpha.xcp-ng.org (2a01:240:ab08:2::2): icmp_seq=1 ttl=63 time=0.672 ms
64 bytes from alpha.xcp-ng.org (2a01:240:ab08:2::2): icmp_seq=2 ttl=63 time=0.295 ms
^C
--- updates.xcp-ng.org ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1010ms
rtt min/avg/max/mdev = 0.295/0.483/0.672/0.188 ms

                                  edit: aaaaah I see! It's just that SOME mirrors aren't IPv6 ready (ours are). This is indeed less trivial to solve. We'll discuss that with @stormi

                                  mathieu-gillootsM 1 Reply Last reply Reply Quote 1
                                  • mathieu-gillootsM
                                    mathieu-gilloots @olivierlambert
                                    last edited by

                                    @olivierlambert Hello
                                    Yes, the problem is on http://mirrors.xcp-ng.org/8/8.2/base/x86_64/repodata/repomd.xml, there is 302 Found to non-IPv6 urls

                                    You can try with :

                                    curl -IvL http://mirrors.xcp-ng.org/8/8.2/base/x86_64/repodata/repomd.xml

                                    You will see the differents mirrors associated (Link), and some of them redirect to ipv4.

                                    < Link: <https://xcpng-mirror.as208069.net/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=1; geo=fr
Link: <https://xcpng-mirror.as208069.net/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=1; geo=fr
< Link: <https://mirror.as50046.net/xcp-ng/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=2; geo=fr
Link: <https://mirror.as50046.net/xcp-ng/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=2; geo=fr
< Link: <https://mirror-xcpng.torontot.fr/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=3; geo=fr
Link: <https://mirror-xcpng.torontot.fr/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=3; geo=fr
< Link: <https://updates.xcp-ng.org/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=4; geo=fr
Link: <https://updates.xcp-ng.org/8/8.2/base/x86_64/repodata/repomd.xml>; rel=duplicate; pri=4; geo=fr
< Location: https://rg2-xcpng-mirror.reptigo.fr/8/8.2/base/x86_64/repodata/repomd.xml
Location: https://rg2-xcpng-mirror.reptigo.fr/8/8.2/base/x86_64/repodata/repomd.xml
...
couldn't connect to host at rg2-xcpng-mirror.reptigo.fr:443:
 Failed to connect to 45.152.69.252
                                    1 Reply Last reply Reply Quote 0
                                    • jivanpalJ
                                      jivanpal
                                      last edited by jivanpal

                                      Howdy, all, just wondering what the status of this feature is as I'm looking to go IPv6-only on my LAN. If it's complete, is there a way for me to add it to an existing installation of 8.2.1 (stable, i.e. an installation that was not made using one of test ISOs mentioned in this thread)?

                                      Cheers

                                      EDIT: Just my luck that I see this feature mentioned in the 8.3 Beta 1 blog post minutes after I post this! If there's any recommended path to enter the beta so that I can upgrade my existing 8.2.1 installation to it and get this feature, I'd love to know how 🙂

                                      1 Reply Last reply Reply Quote 0
                                      • stormiS
                                        stormi Vates 🪐 XCP-ng Team
                                        last edited by

                                        Hi. Check XCP-ng 8.3 beta 1: https://xcp-ng.org/blog/2023/06/22/xcp-ng-8-3-beta-1/

                                        jivanpalJ 1 Reply Last reply Reply Quote 1
                                        • stormiS
                                          stormi Vates 🪐 XCP-ng Team
                                          last edited by

                                          Sorry, I replied based on the e-mail notification I got, and missed your EDIT 🙂

                                          1 Reply Last reply Reply Quote 1
                                          • jivanpalJ
                                            jivanpal @stormi
                                            last edited by

                                            @stormi Am I required to install version 8.3-beta1 from scratch, rather than upgrading, in order to get the new IPv6 functionality? I just ran the upgrade from 8.2.1, but am not seeing any change, nor was I prompted to choose which IP versions to enable during the upgrade process.

                                            If I'm required to upgrade from scratch, is there a recommended way to do this without losing my VM data, given that my pool consists of a single host running all VMs using local storage?

                                            stormiS 1 Reply Last reply Reply Quote 0
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