Copy single file into container via docker-compose and environmental variable

Question

Any ideas why this isn't putting the file into the container?

k6:
    image: loadimpact/k6:0.32.0
    environment:
        - ENVIRONMENT=${ENVIRONMENT}
        - AMOUNT_OF_USERS=${AMOUNT_OF_USERS}
        - RUN_TIME=${RUN_TIME}
    command: run /test.mjs
    volumes:
        - ./load-test.mjs:/test.mjs # <-- this works
        - ./${USERS_FILE}:/users.csv # <-- this does not work

I'm running with the command:

ENVIRONMENT=bla AMOUNT_OF_USERS=5 RUN_TIME=1m USERS_FILE=users2.csv docker-compose up

I did a check inside the container:

console.log(exists('users.csv'))
console.log(exists('test.mjs'))

Results:

k6_1      | time="2021-05-24T11:31:51Z" level=info msg=false source=console
k6_1      | time="2021-05-24T11:31:51Z" level=info msg=true source=console

The USERS_FILE variable file exists in the same directory as the current working directory, i.e. users2.csv.

If I set the volume to the following it works:

- ./users2.csv:/users.csv

Does this answer your question? Using environment variable for volume name in docker compose — DannyB
– DannyB, Commented May 24, 2021 at 12:09
@DannyB Unfortunately no, that is defining a volume name. I would like to name the file name which I want to pull into the container which is dynamic! — basickarl
– basickarl, Commented May 24, 2021 at 12:34
I believe it suffers from the same problem no? It states that variables are not evaluated on the left-hand side (key) of anything. Did you see anywhere that states that variable names can be used? — DannyB
– DannyB, Commented May 24, 2021 at 12:50
@DannyB I was able to answer my own question. Apparently you require the absolute path instead of a relative one, which is annoying! — basickarl
– basickarl, Commented May 24, 2021 at 14:15

basickarl · Accepted Answer · 2021-05-24 12:49:00Z

0

volumes:
    - ./load-test.mjs:/test.mjs
    - ${PWD}/${USERS_FILE}:/users.csv

answered May 24, 2021 at 12:49

basickarl

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