[Bug 1878225] Re: Please remove lxd.snap from lxd images, as it fails to seed thus failing the first boot - snapd.seeded.service waits forever (?) to have snaps seeded in LXD on s390x and arm64

[Robert C Jennings]

@xnox wrote:

> It sounds like we must remove seeded snaps from our LXD images, and not install
> any seeded snaps inside our container. And like only install the lxd stub deb.
> Cause it looks like seeding snaps is not supported inside classic lxd containers.

Let's remember that these aren't just LXD images, they are generic
squashfs images from cloud-images.ubuntu.com.  This raises the issue
that if the generic cloud squashfs is run in any environment where snap
seeding can not complete then boot is stuck and the instance is broken
without cloud-init completing.  This might mean no ssh keys and
difficulties debugging.  So I'll reiterate that this is not an
acceptable solution and note that the issue is broader than even just
unprivileged LXD containers.  Removing all snaps from the squashfs feels
like a significant lost opportunity.

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Title:
  Please remove lxd.snap from lxd images, as it fails to seed thus
  failing the first boot - snapd.seeded.service waits forever (?) to
  have snaps seeded in LXD on s390x and arm64

Status in Auto Package Testing:
  Invalid
Status in cloud-images:
  New
Status in snapd:
  New
Status in autopkgtest package in Ubuntu:
  Invalid
Status in lxd package in Ubuntu:
  Incomplete
Status in snapd package in Ubuntu:
  Confirmed

Bug description:
  lxc launch ubuntu-daily:groovy gg-test
  lxc shell gg-test
  root at gg-test:~# service snapd.seeded status
  ● snapd.seeded.service - Wait until snapd is fully seeded
       Loaded: loaded (/lib/systemd/system/snapd.seeded.service; enabled; vendor preset: enabled)
       Active: activating (start) since Tue 2020-05-12 14:14:52 UTC; 30min ago
     Main PID: 249 (snap)
        Tasks: 10 (limit: 4704)
       Memory: 11.3M
       CGroup: /system.slice/snapd.seeded.service
               └─249 /usr/bin/snap wait system seed.loaded

  May 12 14:14:52 gg-test systemd[1]: Starting Wait until snapd is fully
  seeded...

  root at gg-test:~# systemctl list-jobs 
  JOB UNIT                                 TYPE  STATE  
  132 systemd-update-utmp-runlevel.service start waiting
  119 cloud-config.service                 start waiting
  122 snapd.seeded.service                 start running
  2   multi-user.target                    start waiting
  115 cloud-init.target                    start waiting
  1   graphical.target                     start waiting
  138 snapd.autoimport.service             start waiting
  121 cloud-final.service                  start waiting

  8 jobs listed.

  root at gg-test:~# journalctl -a | pastebinit
  https://paste.ubuntu.com/p/PtdcvvdKCM/

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