** Changed in: cloud-init (Ubuntu Artful)
Status: Confirmed => Fix Committed
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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 Committed
Status in cloud-init source package in Xenial:
Confirmed
Status in cloud-init source package in Yakkety:
Confirmed
Status in cloud-init source package in Zesty:
Confirmed
Status in cloud-init source package in Artful:
Fix Committed
Bug description:
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
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