Docker - check private registry image version

Question

What CLI commands do I need to use in order to check if the image in my private docker registry is a newer version than the one currently running on my server?

E.g.

Answer 1

I don't know if this works as advertised. Just a quick hack I just put together. But this will at least give you a little push on how this might be done.

#!/bin/bash

container=$1
imageid=$(docker inspect --format '{{.Config.Image}}' ${container})

echo "Running version from: $(docker inspect --format '{{.Created}}' ${container})"
echo "Image version from: $(docker inspect --format '{{.Created}}' ${imageid})"

Example output:

[root@server ~]# sh version_check.sh 9e500019b9d4
Running version from: 2014-05-30T08:24:08.761178656Z
Image version from: 2014-05-01T16:48:24.163628504Z