[Bug 1711428] Re: cloud-init sometimes fails on dpkg lock due to concurrent apt-daily-upgrade.service execution

[Jim Browne]

> So I think this is something that you will want to fix in your image
> mastering scripts.

I agree and am fine with this being marked INVALID.

However, is juliank's note about the implementation of After= a concern
w.r.t. how LP#1693361 was resovled?

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https://bugs.launchpad.net/bugs/1711428

Title:
  cloud-init sometimes fails on dpkg lock due to concurrent apt-daily-
  upgrade.service execution

Status in cloud-init:
  Incomplete
Status in apt package in Ubuntu:
  Incomplete

Bug description:
  This is the same problem as https://bugs.launchpad.net/cloud-
  init/+bug/1693361, but with a different APT invoking service.  In this
  case it is apt-daily-upgrade.service.

  So, I guess add apt-daily-upgrade.service to the Before line in
  /lib/systemd/system/cloud-final.service along side apt-daily.service.

  Or wait for an APT fix.  Or retry APT commands when executing
  "packages:"

  Reporting this to save someone else trouble, but I think we'll be
  rolling back to Trusty at this point.  Hopefully the B LTS will have
  an alternative to systemd.

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