18.04 container not starting on dir storage backend but 16.04 does?

LXD
1

Hi

Strange issue. I can launch 16.04 containers on my new dir storage which is using an xfs formatted lvm volume with a directory for the source.

18.04 containers seem to come up with an error though?

Also 18.04 containers working fine on my present ZFS backed storage.

root@server01:/xfs/lxd/containers# lxc list
+------+-------+------+------+------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+------+-------+------+------+------+-----------+
root@server01:/xfs/lxd/containers# lxc launch ubuntu:18.04 -s dir1 -n lxdbr0
Creating the container
Error: Failed container creation: Create container from image: Unpack image: open /var/snap/lxd/common/lxd/images/30b9f587eb6fb50566f4183240933496d7b787f719aafb4b58e6a341495a38ad: no such file or directory
root@server01:/xfs/lxd/containers# lxc launch ubuntu:16.04 -s dir1 -n lxdbr0 
Creating the container
Container name is: light-cricket            
Starting light-cricket
root@server01:/xfs/lxd/containers# lxc list
+---------------+---------+------+-----------------------------------------------+------------+-----------+
|     NAME      |  STATE  | IPV4 |                     IPV6                      |    TYPE    | SNAPSHOTS |
+---------------+---------+------+-----------------------------------------------+------------+-----------+
| light-cricket | RUNNING |      | fd42:9021:b31a:65cb:216:3eff:fedf:2149 (eth0) | PERSISTENT |           |
+---------------+---------+------+-----------------------------------------------+------------+-----------+
root@server01:/xfs/lxd/containers# 

root@server01:/xfs/lxd/containers# lxc storage list
+------------+-------------+--------+-----------------------------------------------+---------+
|    NAME    | DESCRIPTION | DRIVER |                    SOURCE                     | USED BY |
+------------+-------------+--------+-----------------------------------------------+---------+
| btrfs1     |             | btrfs  | d887486e-0125-4da3-85a4-b4c20b026634          | 0       |
+------------+-------------+--------+-----------------------------------------------+---------+
| ceph1      |             | ceph   | ceph1                                         | 1       |
+------------+-------------+--------+-----------------------------------------------+---------+
| default    |             | zfs    | mirr1tb                                       | 17      |
+------------+-------------+--------+-----------------------------------------------+---------+
| dir1       |             | dir    | /xfs/lxd                                      | 0       |
+------------+-------------+--------+-----------------------------------------------+---------+
| juju-btrfs |             | btrfs  | /var/snap/lxd/common/lxd/disks/juju-btrfs.img | 0       |
+------------+-------------+--------+-----------------------------------------------+---------+
| juju-zfs   |             | zfs    | /var/snap/lxd/common/lxd/disks/juju-zfs.img   | 0       |
+------------+-------------+--------+-----------------------------------------------+---------+
| zfs2       |             | zfs    | large1-5/zfs2                                 | 5       |
+------------+-------------+--------+-----------------------------------------------+---------+
root@server01:/xfs/lxd/containers#

Any ideas?
:slight_smile:
Cheers,
Jon.

2

What does lxc image list show you?
If it lists an 18.04 image, try deleting it from the local image store, then try launching the container again.

3

Hi,

Weird, its not even working for 16.04 now, something strange with the way I created my dir storage.

Here goes:

jon@server01:~$ lxc image list
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
| ALIAS | FINGERPRINT  | PUBLIC |                 DESCRIPTION                 |  ARCH  |   SIZE   |         UPLOAD DATE          |
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
|       | 4449aa491760 | no     | ubuntu 16.04 LTS amd64 (release) (20181030) | x86_64 | 158.08MB | Oct 30, 2018 at 9:00pm (UTC) |
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
jon@server01:~$ lxc launch ubuntu:18.04 test1804
Creating test1804
Error: Failed container creation: Create container: Create LXC container: Invalid devices: Detect root disk device: No root device could be found
jon@server01:~$ lxc launch ubuntu:18.04 test1804 -s dir1
Creating test1804
Error: Failed container creation: Create container from image: Unpack image: open /var/snap/lxd/common/lxd/images/30b9f587eb6fb50566f4183240933496d7b787f719aafb4b58e6a341495a38ad: no such file or directory
jon@server01:~$ 

jon@server01:~$ lxc image list
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
| ALIAS | FINGERPRINT  | PUBLIC |                 DESCRIPTION                 |  ARCH  |   SIZE   |         UPLOAD DATE          |
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
|       | 4449aa491760 | no     | ubuntu 16.04 LTS amd64 (release) (20181030) | x86_64 | 158.08MB | Oct 30, 2018 at 9:00pm (UTC) |
+-------+--------------+--------+---------------------------------------------+--------+----------+------------------------------+
jon@server01:~$ lxc launch ubuntu:18.04 test1804
Creating test1804
Error: Failed container creation: Create container: Create LXC container: Invalid devices: Detect root disk device: No root device could be found
jon@server01:~$ lxc launch ubuntu:18.04 test1804 -s dir1
Creating test1804
Error: Failed container creation: Create container from image: Unpack image: open /var/snap/lxd/common/lxd/images/30b9f587eb6fb50566f4183240933496d7b787f719aafb4b58e6a341495a38ad: no such file or directory
jon@server01:~$
4

I’ll go back to the drawing board and re-create it from scratch, see what happens.