aws-cloudformation-task-ecs-deploy-gh

# AWS CloudFormation Task ECS Deploy with GitHub Actions

Comprehensive skill for deploying ECS containers using GitHub Actions CI/CD pipelines with CloudFormation infrastructure management.

## Overview

Deploy containerized applications to Amazon ECS using GitHub Actions workflows. This skill covers the complete deployment pipeline: authentication with AWS (OIDC recommended), building Docker images, pushing to Amazon ECR, updating task definitions, and deploying ECS services. Integrate with CloudFormation for infrastructure-as-code management and implement production-grade deployment strategies.

## When to Use

- Deploying Docker containers to Amazon ECS with GitHub Actions
- Setting up CI/CD pipelines for ECS using CloudFormation
- Configuring AWS OIDC authentication for GitHub Actions
- Building Docker images and pushing to Amazon ECR
- Updating ECS task definitions dynamically in CI/CD
- Implementing blue/green or rolling deployments for ECS
- Managing CloudFormation stacks from GitHub Actions

## Instructions

Follow these steps to set up ECS deployment with GitHub Actions:

1. **Configure AWS Authentication**: Set up OIDC provider for GitHub Actions
2. **Create IAM Roles**: Define roles for deployment actions
3. **Set Up ECR Repository**: Create repository with image scanning
4. **Create ECS Cluster**: Define cluster infrastructure
5. **Configure Task Definition**: Set up task and container definitions
6. **Set Up ECS Service**: Configure service with deployment strategy
7. **Create GitHub Workflow**: Define CI/CD pipeline steps
8. **Configure Secrets**: Store credentials securely in GitHub Secrets

## Quick Start

### Basic Deployment Workflow

```yaml
name: Deploy to ECS
on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    permissions:
      id-token: write
      contents: read
    steps:
      - uses: actions/checkout@v4

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: arn:aws:iam::123456789012:role/github-actions-ecs-role
          aws-region: us-east-1

      - name: Login to ECR
        uses: aws-actions/amazon-ecr-login@v2

      - name: Build and push image
        env:
          ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
          ECR_REPOSITORY: my-app
          IMAGE_TAG: ${{ github.sha }}
        run: |
          docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
          docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG

      - name: Verify image push
        run: |
          docker pull $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
          echo "Image $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG verified"

      - name: Update task definition
        uses: aws-actions/amazon-ecs-render-task-definition@v1
        id: render-task
        with:
          task-definition: task-definition.json
          container-name: my-app
          image: ${{ steps.login-ecr.outputs.registry }}/my-app:${{ github.sha }}

      - name: Validate task definition
        run: |
          # Validate JSON syntax
          cat ${{ steps.render-task.outputs.task-definition }} | jq empty && echo "Task definition JSON is valid"
          # Verify container image matches expected
          CONTAINER_IMAGE=$(cat ${{ steps.render-task.outputs.task-definition }} | jq -r '.containerDefinitions[0].image')
          EXPECTED_IMAGE="${{ steps.login-ecr.outputs.registry }}/my-app:${{ github.sha }}"
          if [ "$CONTAINER_IMAGE" = "$EXPECTED_IMAGE" ]; then
            echo "Container image matches expected: $CONTAINER_IMAGE"
          else
            echo "ERROR: Container image mismatch. Expected: $EXPECTED_IMAGE, Got: $CONTAINER_IMAGE"
            exit 1
          fi

      - name: Deploy to ECS
        uses: aws-actions/amazon-ecs-deploy-task-definition@v1
        with:
          task-definition: ${{ steps.render-task.outputs.task-definition }}
          service: my-service
          cluster: my-cluster
          wait-for-service-stability: true
```

See [references/workflow-examples.md](references/workflow-examples.md) for complete workflow examples including multi-environment and blue/green deployments.

## Examples

### Multi-Environment Deployment

```yaml
jobs:
  deploy:
    strategy:
      matrix:
        environment: [dev, staging, prod]
    steps:
      - uses: actions/checkout@v4
      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: arn:aws:iam::${{ matrix.env_account }}:role/github-actions-ecs-role
          aws-region: ${{ matrix.region }}
      - name: Deploy to ${{ matrix.environment }}
        run: |
          ECR_REGISTRY=${{ env.ECR_REGISTRY }}
          docker build -t $ECR_REGISTRY/my-app:${{ github.sha }} .
          docker push $ECR_REGISTRY/my-app:${{ github.sha }}
```

### Blue/Green Deployment with CodeDeploy

```yaml
- name: Deploy with CodeDeploy
  run: |
    aws deploy create-deployment \
      --application-name my-app \
      --deployment-group-name ${{ matrix.environment }} \
      --deployment-config-name CodeDeployDefault ECSAllAtOnce \
      --revision "{\"revisionType\":\"AppSpecContent\",\"appSpecContent\":{\"content\":\"$(cat appspec.yml)\",\"filename\":\"appspec.yml\"}}"
    aws deploy wait deployment-successful --deployment-id $(aws deploy list-deployments --application-name my-app --query 'deployments[0]' --output text)
```

See [references/workflow-examples.md](references/workflow-examples.md) for additional patterns including ECR lifecycle policies, task definition templates, and CloudFormation stack updates.

## Best Practices

### Security
1. **Use OIDC authentication** instead of long-lived IAM keys
2. **Implement least privilege IAM roles** with specific permissions
3. **Enable ECR image scanning** on push
4. **Use AWS Secrets Manager** for sensitive data
5. **Encrypt ECR repositories** with KMS
6. **VPC endpoints** for ECR and ECS without int