Create a CloudWatch Events rule for an Amazon ECR source (CLI) - AWS CodePipeline

Create a CloudWatch Events rule for an Amazon ECR source (CLI)

Call the put-rule command, specifying:

  • A name that uniquely identifies the rule you are creating. This name must be unique across all of the pipelines you create with CodePipeline associated with your AWS account.

  • The event pattern for the source and detail fields used by the rule. For more information, see Amazon CloudWatch Events and Event Patterns.

To create a CloudWatch Events rule with Amazon ECR as the event source and CodePipeline as the target

  1. Add permissions for Amazon CloudWatch Events to use CodePipeline to invoke the rule. For more information, see Using resource-based policies for Amazon EventBridge.

    1. Use the following sample to create the trust policy that allows CloudWatch Events to assume the service role. Name the trust policy trustpolicyforCWE.json.

      { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": "" }, "Action": "sts:AssumeRole" } ] }
    2. Use the following command to create the Role-for-MyRule role and attach the trust policy.

      aws iam create-role --role-name Role-for-MyRule --assume-role-policy-document file://trustpolicyforCWE.json
    3. Create the permissions policy JSON, as shown in this sample, for the pipeline named MyFirstPipeline. Name the permissions policy permissionspolicyforCWE.json.

      { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "codepipeline:StartPipelineExecution" ], "Resource": [ "arn:aws:codepipeline:us-west-2:80398EXAMPLE:MyFirstPipeline" ] } ] }
    4. Use the following command to attach the CodePipeline-Permissions-Policy-for-CWE permissions policy to the Role-for-MyRule role.

      Why am I making this change? Adding this policy to the role creates permissions for CloudWatch Events.

      aws iam put-role-policy --role-name Role-for-MyRule --policy-name CodePipeline-Permissions-Policy-For-CWE --policy-document file://permissionspolicyforCWE.json
  2. Call the put-rule command and include the --name, --event-pattern, and --role-arn parameters.

    Why am I making this change? You must create an event with a rule that specifies how an image push must be made, and a target that names the pipeline to be started by the event.

    The following sample command creates a rule called MyECRRepoRule.

    aws events put-rule --name "MyECRRepoRule" --event-pattern "{\"detail-type\":[\"ECR Image Action\"],\"source\":[\"aws.ecr\"],\"detail\":{\"action-type\":[\"PUSH\"],\"image-tag\":[\"latest\"],\"repository-name\":[\"cwe-test\"],\"result\":[\"SUCCESS\"]}}}" --role-arn "arn:aws:iam::ACCOUNT_ID:role/Role-for-MyRule"

    To view the full event pattern supported for Amazon ECR events, see Amazon ECR Events and EventBridge or Amazon Elastic Container Registry Events.

  3. To add CodePipeline as a target, call the put-targets command and include the following parameters:

    • The --rule parameter is used with the rule_name you created by using put-rule.

    • The --targets parameter is used with the list Id of the target in the list of targets and the ARN of the target pipeline.

    The following sample command specifies that for the rule called MyECRRepoRule, the target Id is composed of the number one, indicating that in a list of targets for the rule, this is target 1. The sample command also specifies an example Arn for the pipeline and the example RoleArn for the rule. The pipeline starts when something changes in the repository.

    aws events put-targets --rule MyECRRepoRule --targets Id=1,Arn=arn:aws:codepipeline:us-west-2:80398EXAMPLE:TestPipeline,RoleArn=arn:aws:iam::80398EXAMPLE:role/Role-for-MyRule