Public bug reported: We've recently seen odd looking DNS failures on autopkgtest: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful/artful/amd64/d/docker.io/20170921_065231_181b8@/log.gz
This shows a fe80:: link-local IPv6 address as one of the DNS servers on the interface. That's because dnsmasq includes both the link-local and global addresses of its DNS server in the router advertisement. systemd-networkd appears to pick that up and send it to resolved, which includes it in its config but apparently doesn't know how to actually query it, leading to the failure above. This is racy because once DHCPv4 completes, the resolved config will then work properly again. I've confirmed that dnsmasq properly answers on all addresses: http://paste.ubuntu.com/25588197/ I've uploaded a workaround for this issue as part of the docker.io package. ** Affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1718771 Title: Incorrect handling of link-local IPv6 DNS servers Status in systemd package in Ubuntu: New Bug description: We've recently seen odd looking DNS failures on autopkgtest: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful/artful/amd64/d/docker.io/20170921_065231_181b8@/log.gz This shows a fe80:: link-local IPv6 address as one of the DNS servers on the interface. That's because dnsmasq includes both the link-local and global addresses of its DNS server in the router advertisement. systemd-networkd appears to pick that up and send it to resolved, which includes it in its config but apparently doesn't know how to actually query it, leading to the failure above. This is racy because once DHCPv4 completes, the resolved config will then work properly again. I've confirmed that dnsmasq properly answers on all addresses: http://paste.ubuntu.com/25588197/ I've uploaded a workaround for this issue as part of the docker.io package. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1718771/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
