How to copy docker volume from one machine to another?
If the second machine has SSH enabled you can use an Alpine container on the first machine to map the volume, bundle it up and send it to the second machine.
That would look like this:
docker run --rm -v <SOURCE_DATA_VOLUME_NAME>:/from alpine ash -c \
"cd /from ; tar -cf - . " | \
ssh <TARGET_HOST> \
'docker run --rm -i -v <TARGET_DATA_VOLUME_NAME>:/to alpine ash -c "cd /to ; tar -xpvf - "'
You will need to change:
- SOURCE_DATA_VOLUME_NAME
- TARGET_HOST
- TARGET_DATA_VOLUME_NAME
Or, you could try using this helper script https://github.com/gdiepen/docker-convenience-scripts
Hope this helps.
I had an exact same problem but in my case, both volumes were in separate VPCs and couldn't expose SSH to outside world. I ended up creating dvsync which uses ngrok to create a tunnel between them and then use rsync over SSH to copy the data. In your case you could start the dvsync-server
on your machine:
$ docker run --rm -e NGROK_AUTHTOKEN="$NGROK_AUTHTOKEN" \
--mount source=postgres-data,target=/data,readonly \
quay.io/suda/dvsync-server
and then start the dvsync-client
on the target machine:
docker run -e DVSYNC_TOKEN="$DVSYNC_TOKEN" \
--mount source=MY_TARGET_VOLUME,target=/data \
quay.io/suda/dvsync-client
The NGROK_AUTHTOKEN
can be found in ngrok dashboard and the DVSYNC_TOKEN
is being shown by the dvsync-server
in its stdout.
Once the synchronization is done, the dvsync-client
container will stop.