Accessing Docker Image Labels with Dots in Their Names

The docker inspect command provides a versatile means to retrieve information about Docker images, including their labels. However, accessing labels with dots in their names can present a challenge.

Using Basic Notation

For plain label names, the --format option with Go templates allows for straightforward label retrieval:

$ docker build -t foo .
$ docker inspect -f '{{ .Config.Labels.foo }}' foo
bar

Accessing Labels with Dots

To access labels with dots, the Go template syntax falls short. However, the index function within a template can be employed:

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