Announcing the LocalStack 45 Release

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LocalStack for AWS 4.5 introduces significant enhancements, including support for AWS Developer Tools (CodePipeline, CodeBuild, CodeDeploy), enabling full pipeline emulation on your local machine.

Key Features:

  • AppSync WebSockets – Improved real-time data synchronization.
  • API Gateway v1 – Canary deployments and enhanced VTL (Velocity Template Language).
  • RDS – PostgreSQL 17 and DB Proxy support.
  • Replicator – Cross-account VPC replication.
  • CloudFormation – Provisioned concurrency for Lambda.
  • EC2, EventBridge, Cognito – Dozens of parity upgrades.

🐳 Pull the latest version:

docker pull localstack/localstack:4.5.0

📖 Full release notes: blog.localstack.cloud

You Should Know:

1. Running LocalStack with Docker

To start LocalStack 4.5:

docker run -d -p 4566:4566 -p 4510-4559:4510-4559 localstack/localstack:4.5.0

2. Emulating AWS CodePipeline Locally

Configure `aws-cli` to use LocalStack:

aws configure set aws_access_key_id test 
aws configure set aws_secret_access_key test 
aws configure set default.region us-east-1 
aws configure set default.endpoint_url http://localhost:4566

Create a simple pipeline:

aws codepipeline create-pipeline --cli-input-json file://pipeline.json

3. Testing API Gateway Canary Deployments

Deploy a Lambda with canary routing:

aws apigateway create-deployment --rest-api-id YOUR_API_ID --stage-name prod --canary-settings '{"percentTraffic":10.0}'

4. PostgreSQL 17 with RDS Proxy

Spin up a PostgreSQL instance:

aws rds create-db-instance --db-instance-identifier pg17-local --engine postgres --engine-version 17 --db-instance-class db.t3.micro --allocated-storage 20

Set up a proxy:

aws rds create-db-proxy --db-proxy-name local-proxy --engine-family POSTGRESQL --auth "IAM" --role-arn arn:aws:iam::000000000000:role/LocalStackRDSProxyRole

5. Cross-Account VPC Replication

Use the Replicator to clone VPCs:

aws ec2 replicate-vpc --source-vpc-id vpc-123456 --target-account-id 987654321

What Undercode Say

LocalStack 4.5 bridges the gap between cloud and local development, making AWS services more accessible for testing. The addition of CodePipeline, CodeBuild, and CodeDeploy allows developers to simulate CI/CD workflows entirely offline. PostgreSQL 17 support ensures compatibility with the latest database features, while API Gateway canary deployments enable safer rollouts.

Expected Output:

LocalStack container running on http://localhost:4566 
AWS services emulated: 
- CodePipeline 
- RDS (PostgreSQL 17) 
- API Gateway (Canary) 
- EC2 (VPC Replication)

For more details, visit: LocalStack Docs

Prediction

LocalStack will likely expand support for AWS AI services (SageMaker, Bedrock) in future releases, further enhancing local development for machine learning workflows.

Expected Output:

LocalStack 4.5 successfully emulates AWS services locally. 
Developers can now test pipelines, databases, and deployments offline.

IT/Security Reporter URL:

Reported By: Localstack Cloud – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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