This is not fixed, it just affected me on Ubuntu 20.04.3 LTS, resulting in the the subsequent server configuration failing completely because awscli and jq were missing.
Output: Cloud-init v. 21.3-1-g6803368d-0ubuntu1~20.04.4 running 'modules:config' at Fri, 12 Nov 2021 11:05:29 +0000. Up 18.13 seconds. Get:1 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu focal InRelease [265 kB] [... more Gets] E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2764 (unattended-upgr) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it? Cloud-init v. 21.3-1-g6803368d-0ubuntu1~20.04.4 running 'modules:final' at Fri, 12 Nov 2021 11:05:30 +0000. Up 19.15 seconds. 2021-11-12 11:05:38,955 - util.py[WARNING]: Package upgrade failed E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2764 (unattended-upgr) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it? 2021-11-12 11:05:38,999 - util.py[WARNING]: Failed to install packages: ['awscli', 'nmap', 'tcpdump', 'bind9utils', 'curl', 'wget', 'vim', 'jq', 'htop', 'tmux', 'git', 'iotop', 'iftop', 'fail2ban'] 2021-11-12 11:05:38,999 - cc_package_update_upgrade_install.py[WARNING]: 2 failed with exceptions, re-raising the last one 2021-11-12 11:05:39,000 - util.py[WARNING]: Running module package-update-upgrade-install (<module 'cloudinit.config.cc_package_update_upgrade_install' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_package_update_upgrade_install.py'>) failed Note: Before=apt-daily.service is only set on cloud-final.service. -- 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: Fix Released Status in cloud-init: Fix Released Status in apt package in Ubuntu: Invalid Status in cloud-init package in Ubuntu: Fix Released Status in cloud-init source package in Xenial: Fix Released Status in cloud-init source package in Yakkety: Won't Fix Status in cloud-init source package in Zesty: Fix Released 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
