[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
[Expired for systemd (Ubuntu) because there has been no activity for 60 days.] ** Changed in: systemd (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Thanks Christian for your response. - Yes, the guests are connected to a software bridge (br0) created on top of host physical NIC interface and they are getting DHCP IP addresses from external DHCP server. - So far, we have seen this issue a couple of times and only way to recover is to reboot the host system. This indicates, it is something to do with the linux bridge configuration or driver. If it is a DHCP server, the issue should persist across reboot too. - One another data point is that, we don't see this issue if we use "MacVTap configuration" for guests, each of them gets DHCP IP address and no issue of losing IP address. This indicates this issue is something specific to linux bridge (br0) setup. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Christian, Let us move this discussion to DGX2 tracker ticket since we don't want to share any DGX2/Nvidia specific details in the generic ticket. https://bugs.launchpad.net/nvidia-dgx-2/+bug/1818116 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Your configuration looks as if you bridges the guests to an external connected bridge (br0) I assume your guests get DHCP from something else on 172.18.232.11/25 and not from the hosts DNSMASQ is that right? If that is true please provide logs from the actual dnsserver. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Would you have the full journal from the time you started the guest (we should see it getting a lease from dnsmasq) until the guest complains about it being lost? Please attach those from Guest AND Host as I'd like to check if dnsmasq in the host and/or systemd-networkd in the guest had any. Best would be something like this: - attach full journal of host and guest covering all the time - provide a timestamp you started the guest and the guests name and MAC - provide a timestamp the guest lost it's lease - start another guest (as you say they fail) - provide a timestamp of that guest starting That would help a lot to parse your logs more efficiently. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Ah BTW - to keep things clean please just start one guest until the issue occurs and then a second as discussed. Do not start/stop other guests at the time Do not have other guests up before you start Do not restart services for all of the time you track this That also should help to keep the logs clean. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
Finally if your dhcp server might just be flaky/unresponsive then this is the correct behavior. Please fix it on the dhcp server setup then OR follow the discussion at bug 1776013 which leads to https://www.freedesktop.org/software/systemd/man/systemd.network.html#CriticalConnection= But really, if that is it the setup is broken - and not letting go the lease is usually not the right way. Setting incomplete waiting for all the Data that was requested. Once that is provided we can then hopefully also better triage what package/team we are looking at to work on this. ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1817998] Re: KVM Guest - DHCP lease lost (Ubuntu 18.04)
** Attachment added: "01-netcfg.yaml.bridge" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+attachment/5242201/+files/01-netcfg.yaml.bridge -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1817998 Title: KVM Guest - DHCP lease lost (Ubuntu 18.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1817998/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
