Docker volume backup and restore the easy way.

Mon, 29 Aug 2022 21:06:02 +0000

I haven’t had to move docker volumes around in a few years, but I finally had the need today. As usual, I searched for the process, knowing that most examples are… well… not very good. Well, as I almost resorted to pulling a manual job using ubuntu, I found a great write-up by Jarek Lipski on Medium. Here’s how you backup using alpine and tar. Also, make sure you “docker stop” the containers that use the volume, so you get a consistent backup.

Raspberry Pi backup using fsarchiver and other tricks

Tue, 13 Jun 2017 06:56:17 +0000

So I ran into a few issues using the dd image backup I referenced prior Raspberry Pi 3 SDCard backup

The Image is very large even though the data was not. For example on a 32GB SD card I was getting a 12GB file. I only have 3GB of data! so that was a bummer.
When it comes time to recover, I have to expand the gz image file to a full 32GB to then image it onto another SD device. There’s tricks around this I’m sure but still.
Since dd was reading 100% of the SD card (/dev/mmcblk0) even with compression it took a LONG time to create the image. 20 minutes or so. Since I’m backing up a live system this was a real issue.

I did manage to figure out how to create a partial image if your partition sizes were smaller than the actual device - This seemed to work but it still was storing 6.6GB of data which was over double what I actually had:

Backup on kenops

Docker volume backup and restore the easy way.

Raspberry Pi backup using fsarchiver and other tricks