Error upgrading LXD snap talking to snapd

snap
1

I hit errors in the configure hook of the LXD snap when trying to upgrade from 2.16 (3235) to 2.17 (3628) in the latest/candidate channel.

I’m using snapd 2.26.14 on Ubuntu 17.04:
⟫ snap version
snap 2.26.14
snapd 2.26.14
series 16
ubuntu 17.04
kernel 4.10.0-32-generic

The tasks from the failed change are shown below:

Status  Spawn                 Ready                 Summary
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:14Z  Download snap "lxd" (3628) from channel "candidate"
Done    2017-08-25T10:34:04Z  2017-08-25T10:34:13Z  Fetch and check assertions for snap "lxd" (3628)
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:17Z  Mount snap "lxd" (3628)
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:17Z  Stop snap "lxd" services
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:16Z  Remove aliases for snap "lxd"
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:16Z  Make current revision for snap "lxd" unavailable
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:16Z  Copy snap "lxd" data
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:16Z  Setup snap "lxd" (3628) security profiles
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:15Z  Make snap "lxd" (3628) available to the system
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:15Z  Set automatic aliases for snap "lxd"
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:15Z  Setup snap "lxd" aliases
Undone  2017-08-25T10:34:04Z  2017-08-25T10:34:15Z  Start snap "lxd" (3628) services
Done    2017-08-25T10:34:04Z  2017-08-25T10:34:13Z  Clean up "lxd" (3628) install
Error   2017-08-25T10:34:04Z  2017-08-25T10:34:13Z  Run configure hook of "lxd" snap if present

......................................................................
Run configure hook of "lxd" snap if present

2017-08-25T11:34:13+01:00 ERROR run hook "configure":
-----
error: cannot communicate with server: Post http://localhost/v2/snapctl: dial unix /run/snapd-snap.socket: connect: no such file or directory
error: cannot communicate with server: Post http://localhost/v2/snapctl: dial unix /run/snapd-snap.socket: connect: no such file or directory
-----
2

there were a bunch of lxd related fixes in snapd 2.27.4, you could try if the core snap from candidate helps …

to switch core to candidate:

sudo snap refresh core --candidate

do your testing (snap version should show the newer snapd version now)… and to switch back to stable:

sudo snap refresh core --stable
3

Sure, I’d like to but this fails too - as per this thread I need to update lxd before updating core! It appears I’m in a catch-22

4

I think I am on a similar boat to as you. I feel your pain.