How to pass container environment variable to docker compose exec commands [duplicate]

Question

I have container A that has an environment variable called VAR1 set. If I do

docker-compose exec A env

I get the result

VAR1=VALUE1

Now, I need to pass this VALUE1 to another command (lets call this as command1) in the same container, and I tried the following:

docker-compose exec A command1 $VAR1

Unfortunately, $VAR1 is evaluated in the local machine in which this command is run (remember this environment variable is set only inside container A).

How do I pass on specific container environment variables to commands that I run through docker-compose exec?

Eric Citaire · Accepted Answer · 2023-07-13 11:14:13Z

1

You have to execute a shell in the container and pass it the entire command line quoted with single quotes to avoid evaluation on the host :

docker-compose exec A sh -c 'command1 $VAR1'

answered Jul 13, 2023 at 11:14

Eric Citaire

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