I'm wondering what the best/recommended approach is to adding a second disk to
a container. I'm using LXD 2.15 on Ubuntu 16.04. As an example I have a
container where I've limited the disk size to 20GB:
lxduser@blllxd01:~$ lxc config show bllcloudctl01 | grep -A 4 root
root:
path: /
pool: int_lxd
size: 20GB
type: disk
This works great, but say I want the container to have another disk device that
is mounted elsewhere like /mnt/disk1. I've tried adding that in my config but I
alway get an error about needing the source. Since I'm using ZFS I don't have
an actual block device to pass to the source. I then played around with storage
volumes, which appears to work, but I always get an error when editing the
volume:
lxduser@blllxd01:~$ lxc storage volume create int_lxd vol1
Storage volume cinder created
lxduser@blllxd01:~$ lxc storage volume set int_lxd vol1 size=240GB
error: ETag doesn't match:
834842d9406bd41f2f23c097e496434c3c263a022ef3fb1aaf214b13e4395771 vs
b37ae1157f2a46dc1b24b2b561aefccc168ba822d5057330e94ca10ba47ccfb6
If I create the storage volume with the size parameter is works, but doesn't
set the right size:
lxduser@blllxd01:~$ lxc storage volume delete int_lxd vol1
Storage volume cinder deleted
lxduser@blllxd01:~$ lxc storage volume create int_lxd vol1 size=240GB
Storage volume cinder created
lxduser@blllxd01:~$ lxc storage volume show int_lxd vol1
config:
*size: 10GB*
description: ""
name: vol1
type: custom
used_by: []
I really just learned about storage volumes so I'm not even sure if I'm using
them correctly or in the correct context here. Also, I get that ETag error
whenever I edit the volume, even if I didn't make changes:
lxduser@blllxd01:~$ lxc storage volume delete int_lxd vol1
Storage volume cinder deleted
lxduser@blllxd01:~$ lxc storage volume create int_lxd vol1
Storage volume vol1 created
lxduser@blllxd01:~$ lxc storage volume edit int_lxd vol1
/[I immediately exit the editor without making any changes]/
Config parsing error: ETag doesn't match:
446844b3e6b6bc70d7a101b5b281e4cc8fb568cfcd66424f32b2027c8215032a vs
9e27a7a4de3badc96a0046c111094164619f7cfc6351534c7b7236769c85ace1
Press enter to open the editor again
I just want the container to look like it has two disks, one mounted on / and
the other mounted under /mnt.
Thanks,
Joshua Schaeffer
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