Declare env variable which value include space for docker/docker-compose

Question

I have an env variable value like this:
TEST_VAR=The value

Do anybody knowns whether this is legal? should I place \" around the value

Answer 1

You can escape the space with a \:

TEST_VAR=The\ value

Edit: This is how I pass them when starting the container (i.e. docker run -e TEST_VAR=The\ value hello-world). If you're using docker-compose or an env file, see the answer by @yamenk.