How to automatically update your docker containers, if base-images are updated

Question

Say I have a trivial container based on the ubuntu:latest. Now there is a security update and ubuntu:latest is updated in the docker repo .

Answer 1

I'm not going into the whole question of whether or not you want unattended updates in production (I think not). I'm just leaving this here for reference in case anybody finds it useful. Update all your docker images to the latest version with the following command in your terminal:

# docker images | awk '(NR>1) && ($2!~/none/) {print $1":"$2}' | xargs -L1 docker pull