Q: How do I pass environment variables to docker containers?

Using –env, -e When we launch our Docker container, we can pass environment variables as key-value pairs directly into the command line using the parameter –env (or its short form -e). As can be seen, the Docker container correctly interprets the variable VARIABLE1.

Question 1

Can you use variables in docker compose file?

Accepted Answer

We can also specify variables in the docker-compose file that get filled in with values from the . env file. Check out this example: we want our container to have a label that's specified in the . env file.

Question 2

How do I pass environment variables to docker containers?

Accepted Answer

Using &ndash;env, -e When we launch our Docker container, we can pass environment variables as key-value pairs directly into the command line using the parameter &ndash;env (or its short form -e). As can be seen, the Docker container correctly interprets the variable VARIABLE1.

Question 3

What is Depends_on in docker compose?

Accepted Answer

depends_on is a Docker Compose keyword to set the order in which services must start and stop. For example, suppose we want our web application, which we'll build as a web-app image, to start after our Postgres container.

Question 4

Does docker use .env file?

Accepted Answer

Here's a list of easy takeaways: The . env file, is only used during a pre-processing step when working with docker-compose. yml files.

docker compose variable substitution

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docker

docker-compose

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