Specifying sensitive data using Systems Manager Parameter Store - AWS Batch

Specifying sensitive data using Systems Manager Parameter Store

With AWS Batch, you can inject sensitive data into your containers by storing your sensitive data in AWS Systems Manager Parameter Store parameters and then referencing them in your container definition.

Considerations for specifying sensitive data using Systems Manager Parameter Store

The following should be considered when specifying sensitive data for containers using Systems Manager Parameter Store parameters.

  • This feature requires that your container instance have version 1.22.0 or later of the container agent. However, we recommend using the latest container agent version. For information about checking your agent version and updating to the latest version, see Updating the Amazon ECS container agent in the Amazon Elastic Container Service Developer Guide.

  • Sensitive data is injected into the container for your job when the container is initially started. If the secret or Parameter Store parameter is subsequently updated or rotated, the container doesn't receive the updated value automatically. You must launch a new job to force the launch of a fresh job with updated secrets.

Required IAM permissions for AWS Batch secrets

To use this feature, you must have the execution role and reference it in your job definition. This allows the Amazon ECS container agent to pull the necessary AWS Systems Manager resources. For more information, see AWS Batch execution IAM role.

To provide access to the AWS Systems Manager Parameter Store parameters that you create, manually add the following permissions as an inline policy to the execution role. For more information, see Adding and Removing IAM Policies in the IAM User Guide.

  • ssm:GetParameters—Required if you're referencing a Systems Manager Parameter Store parameter in a task definition.

  • secretsmanager:GetSecretValue—Required if you're referencing a Secrets Manager secret either directly or if your Systems Manager Parameter Store parameter is referencing a Secrets Manager secret in a task definition.

  • kms:Decrypt—Required only if your secret uses a custom KMS key and not the default key. The ARN for your custom key should be added as a resource.

The following example inline policy adds the required permissions:

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "ssm:GetParameters", "secretsmanager:GetSecretValue", "kms:Decrypt" ], "Resource": [ "arn:aws:ssm:<region>:<aws_account_id>:parameter/<parameter_name>", "arn:aws:secretsmanager:<region>:<aws_account_id>:secret:<secret_name>", "arn:aws:kms:<region>:<aws_account_id>:key/<key_id>" ] } ] }

Injecting sensitive data as an environment variable

Within your container definition, specify secrets with the name of the environment variable to set in the container and the full ARN of the Systems Manager Parameter Store parameter containing the sensitive data to present to the container.

The following is a snippet of a task definition showing the format when referencing an Systems Manager Parameter Store parameter. If the Systems Manager Parameter Store parameter exists in the same Region as the task that you're launching, then you can use either the full ARN or name of the parameter. If the parameter exists in a different Region, then the full ARN must be specified.

{ "containerProperties": [{ "secrets": [{ "name": "environment_variable_name", "valueFrom": "arn:aws:ssm:region:aws_account_id:parameter/parameter_name" }] }] }

Injecting sensitive data in a log configuration

Within your container definition, when specifying a logConfiguration you can specify secretOptions with the name of the log driver option to set in the container and the full ARN of the Systems Manager Parameter Store parameter containing the sensitive data to present to the container.

Important

If the Systems Manager Parameter Store parameter exists in the same Region as the task you're launching, then you can use either the full ARN or name of the parameter. If the parameter exists in a different Region, then the full ARN must be specified.

The following is a snippet of a task definition showing the format when referencing an Systems Manager Parameter Store parameter.

{ "containerProperties": [{ "logConfiguration": [{ "logDriver": "fluentd", "options": { "tag": "fluentd demo" }, "secretOptions": [{ "name": "fluentd-address", "valueFrom": "arn:aws:ssm:region:aws_account_id:parameter:parameter_name" }] }] }] }

Creating an AWS Systems Manager Parameter Store parameter

You can use the AWS Systems Manager console to create a Systems Manager Parameter Store parameter for your sensitive data. For more information, see Walkthrough: Create and Use a Parameter in a Command (Console) in the AWS Systems Manager User Guide.

To create a Parameter Store parameter

  1. Open the AWS Systems Manager console at https://console.aws.amazon.com/systems-manager/.

  2. In the navigation pane, choose Parameter Store, Create parameter.

  3. For Name, type a hierarchy and a parameter name. For example, type test/database_password.

  4. For Description, type an optional description.

  5. For Type, choose String, StringList, or SecureString.

    Note
    • If you choose SecureString, the KMS Key ID field appears. If you don't provide a KMS CMK ID, a KMS CMK ARN, an alias name, or an alias ARN, then the system uses alias/aws/ssm. This is the default KMS CMK for Systems Manager. To avoid using this key, choose a custom key. For more information, see Use Secure String Parameters in the AWS Systems Manager User Guide.

    • When you create a secure string parameter in the console by using the key-id parameter with either a custom KMS CMK alias name or an alias ARN, you must specify the prefix alias/ before the alias. The following is an ARN example:

      arn:aws:kms:us-east-2:123456789012:alias/MyAliasName

      The following is an alias name example:

      alias/MyAliasName
  6. For Value, type a value. For example, MyFirstParameter. If you chose SecureString, the value is masked exactly as you entered it.

  7. Choose Create parameter.