How can I get a Docker image's label if the label name has a “.” in it?

Question

The docker inspect command can be very useful for getting the labels on a Docker image:

# -*- Dockerfile -*-
FROM busybox
LABEL foo=\"bar\"
LABEL com.whereve         


        

Answer 1

The index function is what I was looking for. It can lookup arbitrary strings in the map.

$ docker inspect -f '{{ index .Config.Labels "com.wherever.foo" }}' foo
bang