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How to find the size of a lxc container

In order to determine the size of a LXC container, first run lxc storage list to list your storage pools:

lxc_storage_list.sh
uli@myserver:~$ lxc storage list
+---------+-------------+--------+------------------------------------+---------+
|  NAME   | DESCRIPTION | DRIVER |               SOURCE               | USED BY |
+---------+-------------+--------+------------------------------------+---------+
| default |             | dir    | /var/lib/lxd/storage-pools/default | 2       |
+---------+-------------+--------+------------------------------------+---------+

If the driver is not dir, you are using a COW-type storage backend. Using this technology it is not possible to easily determine the storage size of a container. The following instructions apply only for the dir driver.

Now open a root shell and cd to the directory listed in the SOURCE column and cd to its containers subdirectory:

cd_to_containers.sh
root@myserver ~ # cd /var/lib/lxd/storage-pools/default
root@myserver /var/lib/lxd/storage-pools/default # cd containers/
root@myserver /var/lib/lxd/storage-pools/default/containers #

This directory contains the storage directory for all containers. Run du -sh * in order to find the size of each container:

du_containers.sh
root@myserver /var/lib/lxd/storage-pools/default/containers # du -sh *
2.0G    my-container

In this example, the container my-container occupies 2.0 Gibibytes of disk space.

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