Lxc list hangs, version 4.1

LXD
1

Hello,

‘lxc list’ is hanging for me since yesterday.

# cat /var/snap/lxd/common/lxd/logs/lxd.log
t=2020-05-26T22:27:49+0530 lvl=info msg="LXD 4.1 is starting in normal mode" path=/var/snap/lxd/common/lxd
t=2020-05-26T22:27:49+0530 lvl=info msg="Kernel uid/gid map:" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - u 0 0 4294967295" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - g 0 0 4294967295" 
t=2020-05-26T22:27:49+0530 lvl=info msg="Configured LXD uid/gid map:" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - u 0 1000000 1000000000" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - g 0 1000000 1000000000" 
t=2020-05-26T22:27:49+0530 lvl=warn msg="AppArmor support has been disabled because of lack of kernel support" 
t=2020-05-26T22:27:49+0530 lvl=info msg="Kernel features:" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - netnsid-based network retrieval: yes" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - uevent injection: yes" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - seccomp listener: yes" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - seccomp listener continue syscalls: no" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - unprivileged file capabilities: yes" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - cgroup layout: hybrid" 
t=2020-05-26T22:27:49+0530 lvl=warn msg=" - Couldn't find the CGroup blkio.weight, I/O weight limits will be ignored" 
t=2020-05-26T22:27:49+0530 lvl=info msg=" - shiftfs support: disabled" 
t=2020-05-26T22:27:49+0530 lvl=info msg="Initializing local database" 
t=2020-05-26T22:27:50+0530 lvl=info msg="Starting /dev/lxd handler:" 
t=2020-05-26T22:27:50+0530 lvl=info msg=" - binding devlxd socket" socket=/var/snap/lxd/common/lxd/devlxd/sock
t=2020-05-26T22:27:50+0530 lvl=info msg="REST API daemon:" 
t=2020-05-26T22:27:50+0530 lvl=info msg=" - binding Unix socket" inherited=true socket=/var/snap/lxd/common/lxd/unix.socket
t=2020-05-26T22:27:50+0530 lvl=info msg=" - binding TCP socket" socket=[::]:8443
t=2020-05-26T22:27:50+0530 lvl=info msg="Initializing global database" 


# systemctl status snap.lxd.daemon
* snap.lxd.daemon.service - Service for snap application lxd.daemon
     Loaded: loaded (/etc/systemd/system/snap.lxd.daemon.service; static; vendor preset: disabled)
     Active: active (running) since Tue 2020-05-26 22:27:49 IST; 3min 59s ago
TriggeredBy: * snap.lxd.daemon.unix.socket
   Main PID: 542836 (daemon.start)
      Tasks: 0 (limit: 154552)
     Memory: 5.0M
     CGroup: /system.slice/snap.lxd.daemon.service
             > 542836 /bin/sh /snap/lxd/15161/commands/daemon.start

May 26 22:27:49 nas lxd.daemon[9873]: - proc_loadavg
May 26 22:27:49 nas lxd.daemon[9873]: - proc_meminfo
May 26 22:27:49 nas lxd.daemon[9873]: - proc_stat
May 26 22:27:49 nas lxd.daemon[9873]: - proc_swaps
May 26 22:27:49 nas lxd.daemon[9873]: - proc_uptime
May 26 22:27:49 nas lxd.daemon[9873]: - shared_pidns
May 26 22:27:49 nas lxd.daemon[9873]: - cpuview_daemon
May 26 22:27:49 nas lxd.daemon[9873]: - loadavg_daemon
May 26 22:27:49 nas lxd.daemon[9873]: - pidfds
May 26 22:27:49 nas lxd.daemon[9873]: Reloaded LXCFS

Any idea what could be the issue?

2

Well, what exactly does hanging mean?

Does it show nothing?
Or does it show the list after longer time (minutes)?
Does it show an error?

How many containers do you have?

3

It is sitting there doing nothing,

# lxc list --fast --debug
DBUG[05-26|22:34:38] Connecting to a local LXD over a Unix socket 
DBUG[05-26|22:34:38] Sending request to LXD                   method=GET url=http://unix.socket/1.0 etag=
4

Here is an strace.

5

Can you run snap set lxd daemon.debug=true, then restart lxd and attach again here the content of lxd.log?

6

Unfortunately, I rebooted the server to get LXD going. If this happens again, will update this thread.