It is possible to move docker directory to another disk

Installing and Using OpenWrt
1

Hi,

When using docker on SBCs with OS on sdcard I usually move the docker to an external disk. Example: https://linuxconfig.org/how-to-move-docker-s-default-var-lib-docker-to-another-directory-on-ubuntu-debian-linux

How can I achieve the same on openwrt?

Thank you

2

I don't see why not. Since OpenWrt is not using systemd go to /etc/init.d/dockerd and work your way from there.

3

Same problem here. Docker is located in
/media/nvme/docker and with some containers it is working flawlessly - maybe because they are small.

So let's check if the config is correct:

root@FriendlyWrt:/tmp/dockerd# cat daemon.json 
{ "data-root": "\/media\/nvme\/docker\/", "log-level": "warn", "iptables": true }

This looks good, this is where it should be.

So let's start HA through

root@FriendlyWrt:/# docker run -d   --name homeassistant   --privileged   --restart=unless-stopped   -p 8123:8123   -e TZ="Europe/Berlin"   -v homeassistant_config:/config   --network=host   ghcr.io/home-assistant/home-assistant:stable

Which fails with

docker: failed to register layer: ApplyLayer exit status 1 stdout:  stderr: open /usr/local/lib/python3.10/site-packages/screenlogicpy/requests/request.py: no space left on device.
See 'docker run --help'.

So if I understand it right, the system is still using /usr/local which is of course on a "small" disk. we see the mem peak here

image
image1226Ɨ823 60.3 KB

So I checked

and

but they all don't apply :frowning:

So right now I have an unused 1TB SSD in the machine (NanoPi R5S with 4GB RAM, 32GB onboard eMMC and 1TB SSD) but I cannot tell the Docker to start the container :frowning:

Should I create a swap partition? Any recommendation would be highly appreciated!

4

Is this OpenWrt or FriendlyWrt? If it is the latter, you'd better ask here.

5

It is FriendlyWRT - my understanding was, that this is based on OpenWRT. Sorry for that.

6

It is based, but we don't know which alternations they have done to their images.

7

Would it be better with original OpenWRT? I am not married to FriendlyWRT, so as long as I can run

  • a routing firewall
  • Docker for Zigbee2MQTT/MQTT/HA I am happy
  • the OS on the eMMC
    I would switch immediately.
8

I cannot suggest you to switch to OpenWrt, as there is no official image for OpenWrt yet.

There is an unofficial image if you want to try.

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