How to get ENV variable when doing Docker Inspect

Question

I wonder how I get an Environment variable from docker inspect.

when i run

docker inspect -f \"{{.Config.Env.PATH}} \" 1e2b8689cf06

Answer 1

A very convenient option that doesn't require any external tools is:

docker exec 1e2b8689cf06 sh -c 'echo $PATH'

Admittedly this is not using docker inspect, but still..

Answer 2

I find it better to parse for the environment variable name your interested than relying on index.

echo $(docker inspect --format '{{ .Config.Env }}' mysql) |  tr ' ' '\n' | grep MYSQL_ROOT_PASSWORD | sed 's/^.*=//'