Comment 9 for bug 1839616

I see various glitches quite early:

Aug 10 22:20:54 juju-5b349a-5-lxd-8 systemd[1]: cloud-init.service: Main process exited, code=exited, status=1/FAILURE
...
Aug 10 22:20:54 juju-5b349a-5-lxd-8 chattr[229]: /usr/bin/chattr: Permission denied while reading flags on /sys/firmware/efi/efivars/db-d719b2cb-3d3a-4596-a3bc-dad00e67656f
Aug 10 22:20:54 juju-5b349a-5-lxd-8 rsyslogd[222]: imuxsock: Acquired UNIX socket '/run/systemd/journal/syslog' (fd 3) from systemd. [v8.2001.0]
Aug 10 22:20:54 juju-5b349a-5-lxd-8 chattr[235]: /usr/bin/chattr: Permission denied while reading flags on /sys/firmware/efi/efivars/dbx-d719b2cb-3d3a-4596-a3bc-dad00e67656f
Aug 10 22:20:54 juju-5b349a-5-lxd-8 rsyslogd[222]: imklog: cannot open kernel log (/proc/kmsg): Permission denied.
Aug 10 22:20:54 juju-5b349a-5-lxd-8 rsyslogd[222]: activation of module imklog failed [v8.2001.0 try https://www.rsyslog.com/e/2145 ]
...
Aug 10 22:20:54 juju-5b349a-5-lxd-8 sbkeysync[239]: from /usr/share/secureboot/updates/dbx/MS-2016-08-08.bin
Aug 10 22:20:54 juju-5b349a-5-lxd-8 sbkeysync[239]: 09df5f4e511208ec78b96d12dCan't create key file /sys/firmware/efi/efivars/dbx-d719b2cb-3d3a-4596-a3bc-dad00e67656f: Permission denied
Aug 10 22:20:54 juju-5b349a-5-lxd-8 sbkeysync[239]: Error syncing keystore file /usr/share/secureboot/updates/dbx/MS-2016-08-08.bin
...
Aug 10 22:21:33 juju-5b349a-5-lxd-8 systemd[1]: cloud-final.service: Main process exited, code=exited, status=1/FAILURE
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Aug 10 22:21:38 juju-5b349a-5-lxd-8 lxd.daemon[3478]: ==> Setting up persistent shmounts path
Aug 10 22:21:39 juju-5b349a-5-lxd-8 lxd.daemon[3543]: Failed to mark /media/.lxd-shmounts as private: Invalid argument
Aug 10 22:21:39 juju-5b349a-5-lxd-8 lxd.daemon[3542]: Failed to setup the shmounts namespace: No such file or directory
Aug 10 22:21:39 juju-5b349a-5-lxd-8 lxd.daemon[3478]: ====> Failed to setup shmounts, continuing without
Aug 10 22:21:39 juju-5b349a-5-lxd-8 lxd.daemon[3478]: ====> Making LXD shmounts use the persistent path
Aug 10 22:21:39 juju-5b349a-5-lxd-8 lxd.daemon[3478]: ====> Making LXCFS use the persistent path
...
Aug 10 22:21:40 juju-5b349a-5-lxd-8 lxd.daemon[3478]: => Starting LXCFS
Aug 10 22:21:40 juju-5b349a-5-lxd-8 lxd.daemon[3645]: Running constructor lxcfs_init to reload liblxcfs
Aug 10 22:21:40 juju-5b349a-5-lxd-8 lxd.daemon[3645]: bindings.c: 791: cgfs_setup_controllers: Failed to set up private lxcfs cgroup mounts
Aug 10 22:21:41 juju-5b349a-5-lxd-8 lxd.daemon[3645]: Failed to setup private cgroup mounts for lxcfs
Aug 10 22:21:41 juju-5b349a-5-lxd-8 lxd.daemon[3648]: cat: /var/snap/lxd/common/lxcfs.pid: No such file or directory
Aug 10 22:21:41 juju-5b349a-5-lxd-8 lxd.daemon[3478]: => Starting LXD
Aug 10 22:21:42 juju-5b349a-5-lxd-8 systemd-resolved[145]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.
Aug 10 22:21:43 juju-5b349a-5-lxd-8 lxd.daemon[3653]: t=2020-08-10T22:21:43+0000 lvl=warn msg=" - Couldn't find the CGroup blkio.weight, I/O weight limits will be ignored"
Aug 10 22:21:43 juju-5b349a-5-lxd-8 lxd.daemon[3653]: t=2020-08-10T22:21:43+0000 lvl=warn msg=" - Couldn't find the CGroup memory swap accounting, swap limits will be ignored"
Aug 10 22:21:45 juju-5b349a-5-lxd-8 lxd.daemon[3478]: => First LXD execution on this system
Aug 10 22:21:45 juju-5b349a-5-lxd-8 lxd.daemon[3478]: => LXD is ready
Aug 10 22:22:05 juju-5b349a-5-lxd-8 systemd-resolved[145]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.
Aug 10 22:22:10 juju-5b349a-5-lxd-8 systemd-resolved[145]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.

And I think one of these glitches then lead to our actual problem:

Aug 10 22:29:03 juju-5b349a-5-lxd-8 systemd[10875]: snap-mysql\x2dshell-4.mount: Failed to link user keyring into session keyring: Required key not available
Aug 10 22:29:03 juju-5b349a-5-lxd-8 systemd[10875]: snap-mysql\x2dshell-4.mount: Failed to set up kernel keyring: Required key not available
Aug 10 22:29:03 juju-5b349a-5-lxd-8 systemd[10875]: snap-mysql\x2dshell-4.mount: Failed at step KEYRING spawning /bin/mount: Required key not available