Absolutely! You can definitely trigger a pipeline hosted in AWS's eu-west-1 region and deploy your CloudFormation stack to any other target region—this works just like specifying the region with the AWS CLI's aws --region <target-region> cloudformation deploy command. Here are practical, actionable approaches to make this happen:

1. Use Pipeline Parameters to Dynamically Specify the Target Region #

This is the most flexible approach, letting you choose the target region each time you trigger the pipeline:

• First, add a pipeline parameter (e.g., TargetRegion) to your CodePipeline configuration. When you manually trigger the pipeline, you’ll be prompted to input the desired region (like us-east-1 or ap-southeast-2).
• If using CodeBuild for deployment: Pass the parameter as an environment variable to your CodeBuild project. In your buildspec.yml, reference it directly in the CloudFormation deploy command:

  version: 0.2
  env:
    parameters:
      TARGET_REGION: "us-east-1" # Set a default region
  phases:
    build:
      commands:
        - echo "Starting deployment to region: $TARGET_REGION"
        - aws cloudformation deploy \
            --region $TARGET_REGION \
            --template-file ./your-stack-template.yml \
            --stack-name your-target-stack \
            --capabilities CAPABILITY_IAM CAPABILITY_NAMED_IAM
  

• If using CodePipeline’s native CloudFormation action: In the action configuration, set the "Region" field to reference your pipeline parameter using the syntax #{TargetRegion}. This tells CodePipeline to deploy the stack to the region you specified at trigger time.

2. Deploy to Multiple Fixed Regions with Staged Pipeline Steps #

If you need to deploy to a set list of regions every time, structure your pipeline with multiple deployment stages—one per target region:

• For each stage, add a CloudFormation deploy action and explicitly set the target region in the action’s configuration (e.g., one stage for us-west-2, another for eu-central-1).
• This is great for consistent multi-region deployments where you don’t need to change the target regions dynamically.

3. Use AWS Step Functions for Complex Multi-Region Workflows #

For more advanced scenarios (like parallel deployments, failure retries, or conditional region deployments), integrate Step Functions into your pipeline:

• Create a Step Functions state machine that accepts the target region(s) as input. The state machine can execute the CloudFormation deploy API call with the specified region.
• Trigger the state machine from your CodePipeline (using the "Invoke AWS Step Functions" action), passing the target region parameter from the pipeline into the state machine’s input.

Critical Permission Note #

Make sure the IAM roles associated with your pipeline components (CodePipeline service role, CodeBuild execution role, Step Functions execution role) have cross-region permissions:

• They need permissions like cloudformation:CreateStack, cloudformation:UpdateStack, and any resource-specific permissions (e.g., ec2:CreateVPC) in the target regions.
• You can grant these permissions by including the target regions in the resource ARNs (e.g., arn:aws:cloudformation:*:*:stack/*/*) or explicitly listing each region in the policy.

内容的提问来源于stack exchange，提问作者nixmind