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Add environment variables

Environment variables are name/value pairs that are dynamically loaded into your containers at runtime. They are often used to pass configuration details to your application. Using environment variables instead of hard-coded values lets you keep environment-specific details out of your source code.

When you define your application stack with a Uffizzi Compose file, you have two options for adding environment variables to your containers: environment or env_file.

  • Use environment if you have a small number of environment variables to add. You can list your variables in an environment block within the service definition. For example, the following docker-compose.uffizzi.yml snippet adds two environment variables, FOO and BAR, to the myservice container:

    services:
        mysevice:
          image: example/myservice:latest
          environment:
            FOO: bar
            BAR: baz
    

  • Use env_file if you have a large number of enviroment variables that would otherwise clutter up your compose file. You can store your variables in a file within your repository and use the env_file component to specify the path to this file. For example, the following docker-compose.uffizzi.yml snippet tells Uffizzi to read the contents of envs/myconfigs.env and add them to the container myservice:

    services:
        mysevice:
          image: example/myservice:latest
          env_file: ./envs/myconfigs.env
    

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