** Attachment added: "zesty results" https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1693361/+attachment/4905924/+files/1693361-zesty.tar.gz
** Tags removed: verification-needed verification-needed-xenial verification-needed-yakkety verification-needed-zesty ** Tags added: verification-done-xenial verification-done-yakkety verification-done-zesty -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1693361 Title: cloud-init sometimes fails on dpkg lock due to concurrent apt- daily.service execution Status in APT: Confirmed Status in cloud-init: Confirmed Status in apt package in Ubuntu: New Status in cloud-init package in Ubuntu: Fix Released Status in cloud-init source package in Xenial: Fix Committed Status in cloud-init source package in Yakkety: Fix Committed Status in cloud-init source package in Zesty: Fix Committed Status in cloud-init source package in Artful: Fix Released Bug description: === Begin SRU Template === [Impact] A cloud-config that contains packages to install (see below) or 'package_upgrade' will run 'apt-get update'. That can sometimes fail as a result of contention with the apt-daily.service that updates that information. Cloud-config showing the problem is just like: $ cat my.yaml #cloud-config packages: ['hello'] [Test Case] lxc-proposed-snapshot is https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/tree/bin/lxc-proposed-snapshot It publishes an image to lxd with proposed enabled and cloud-init upgraded. a.) launch an instance with proposed version of cloud-init and some user-data. This is platform independent. The test case demonstrates lxd. $ printf "%s\n%s\n%s\n" "#cloud-config" "packages: ['hello']" \ "package_upgrade: true" > config.yaml $ release=xenial $ ref=proposed-$release $ ./lxc-proposed-snapshot --proposed --publish $release $ref; b.) start the instance $ name=$release-1693361 $ lxc launch my-xenial "--config=user.user-data=$(cat config.yaml) $ sleep 1 $ lxc exec $name -- tail -f /var/log/cloud-init.log /var/log/cloud-init-output.log # watch this boot. c.) Look for evidence of systemd failure journalctl -o short-precise | grep -i break journalctl -o short-precise | grep -i order [Regression Potential] Regression chance here is low. Its possible that ordering loops could occur. When that does happen, journalctl will mention it. Unfortunately in such cases systemd somewhat randomly picks a service to kil so behavior is somewhat undefined. [Other Info] Upstream commit at https://git.launchpad.net/cloud-init/commit/?id=11121fe4 === End SRU Template === apt-daily is now a systemd service rather than being invoked by cron.daily. If one builds a custom AMI it is possible that the apt- daily.timer will fire during boot. This can fire at the same time cloud-init is running and if cloud-init loses the race the invocation of apt (e.g. use of "packages:" in the config) will fail. There is a lot of discussion online about this change to apt-daily (e.g. unattended upgrades happening during business hours, delaying boot, etc.) and discussion of potential systemd changes regarding timers firing during boot (c.f. https://github.com/systemd/systemd/issues/5659). While it would be better to solve this in apt itself, I suggest that cloud-init be defensive when calling apt and implement some retry mechanism. Various instances of people running into this issue: https://github.com/chef/bento/issues/609 https://clusterhq.atlassian.net/browse/FLOC-4486 https://github.com/boxcutter/ubuntu/issues/73 https://unix.stackexchange.com/questions/315502/how-to-disable-apt-daily-service-on-ubuntu-cloud-vm-image To manage notifications about this bug go to: https://bugs.launchpad.net/apt/+bug/1693361/+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
