How to Mount External Directory Inside the Linux Container

This guide helps you to mount external directory inside the Linux container.If you are yet to setup Linux container in your environment, here are the guides you should take a look.

READ: Setup Linux Container with LXC on Ubuntu 16.04

READ: Setup Linux Container with LXC on CentOS 7 / RHEL 7

Step 1: Create a mounting directory on the host. Ex: raj, if you want to mount the device under the mount point “/raj” inside the Linux container.

sudo mkdir /var/lib/lxc/ubuntu_lxc/rootfs/raj

Step 2: Mount the device on the above directory.

sudo mount /dec/sda1 /var/lib/lxc/ubuntu_lxc/rootfs/raj

You should run the above commands on the Linux host, i.e., host operating system.

Where,

raj –  Mount point

/dev/sda1 –  Device you want to mount

ubuntu_lxc – Name of the Linux container

Step 3: Take a console or log in to Linux container and use df command to see the external directory.

sudo lxc-console -n ubuntu_lxc

The output of mounted external directory:

ubuntu@ubuntu_lxc:~$ df -h
Filesystem                   Size  Used Avail Use% Mounted on
/dev/mapper/server--vg-root   97G  2.8G   90G   3% /
none                         492K     0  492K   0% /dev
tmpfs                        488M     0  488M   0% /dev/shm
tmpfs                        488M  6.2M  482M   2% /run
tmpfs                        5.0M     0  5.0M   0% /run/lock
tmpfs                        488M     0  488M   0% /sys/fs/cgroup
/dev/sda1                    472M  148M  300M  33% /raj
ubuntu@ubuntu_lxc:~$

That’s All.

How to Mount External Directory Inside the Linux Container
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  • jbombs16

    thanks for the guide. when trying to mount, I get this error: “mount: special device /mnt/USB/downloads does not exist”

    Am I doing something wrong?

    • Raj

      Can you share me the command you are using.

      • jbombs16

        I had an spelling error. This is the correct command I used:

        sudo mount /mnt/USB/downloads/transmission /var/lib/lxc/transmission/rootfs/downloads

        When do this command, i got the error that the mnt/USB “is not a block device”

        I found a solution online that is below:

        sudo mount –bind /mnt/USB/downloads/transmission /var/lib/lxc/transmission/rootfs/downloads

        you may want to add the –bind option to the guide if you get the “not a block device” error

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