EnvironmentFile - Amazon Elastic Container Service


A list of files containing the environment variables to pass to a container. You can specify up to ten environment files. The file must have a .env file extension. Each line in an environment file should contain an environment variable in VARIABLE=VALUE format. Lines beginning with # are treated as comments and are ignored.

If there are environment variables specified using the environment parameter in a container definition, they take precedence over the variables contained within an environment file. If multiple environment files are specified that contain the same variable, they're processed from the top down. We recommend that you use unique variable names. For more information, see Use a file to pass environment variables to a container in the Amazon Elastic Container Service Developer Guide.

Environment variable files are objects in Amazon S3 and all Amazon S3 security considerations apply.

You must use the following platforms for the Fargate launch type:

  • Linux platform version 1.4.0 or later.

  • Windows platform version 1.0.0 or later.

Consider the following when using the Fargate launch type:

  • The file is handled like a native Docker env-file.

  • There is no support for shell escape handling.

  • The container entry point interperts the VARIABLE values.



The file type to use. Environment files are objects in Amazon S3. The only supported value is s3.

Type: String

Valid Values: s3

Required: Yes


The Amazon Resource Name (ARN) of the Amazon S3 object containing the environment variable file.

Type: String

Required: Yes

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: