Set GOOGLE_APPLICATION_CREDENTIALS in Docker

Question

I want to set GOOGLE_APPLICATION_CREDENTIALS inside my docker container using my key.json file but I don't want to copy this file into my container.

Answer 1

 docker run \
   -e GOOGLE_APPLICATION_CREDENTIALS=/tmp/keys/[FILE_NAME].json \
   -v $GOOGLE_APPLICATION_CREDENTIALS:/tmp/keys/[FILE_NAME].json:ro \
   gcr.io/[PROJECT_ID]/[IMAGE]

Ref: https://cloud.google.com/run/docs/testing/local

Answer 2

For anyone who is using a key file in the current working directory:

docker run \
  -e GOOGLE_APPLICATION_CREDENTIALS=/tmp/keys/[FILE_NAME].json \
  -v $(pwd):/tmp/keys/[FILE_NAME].json:ro \
  gcr.io/[PROJECT_ID]/[IMAGE]