Summary

LocalStack 4.12 is now available! This release introduces Lambda Managed Instances, enhanced Step Functions unit testing capabilities, expanded Glue API support with user-defined functions and column statistics, and Network Load Balancer TCP listener emulation. Additional enhancements include EventBridge Pipes input transformation, Application Load Balancer HTTPS targets, improved IAM policy simulation, and updates across S3 Tables, CloudWatch Logs, and multiple AWS services.

AWS Features

• LocalStack now supports Lambda Managed Instances, a new Lambda execution mode that allows for predictable pricing when handling a high volume of Lambda invocations. Learn more in our blog post.
• LocalStack now provides comprehensive support for unit testing AWS Step Functions via enhanced TestState API capabilities. Learn more in our blog post.

Enhancements

• Upgraded the kinesis-mock version from 0.5.1 to 0.5.2.
• Added support in CloudFormation v2 for List<AWS::EC2::SubnetId> template parameters.
• Added support for additional RSA key lengths and several EC key types in ACM certificates.
• Added support for the EU LocationConstraint in the S3 CreateBucket operation.
• Added support for Airflow 3.0.6 in Managed Workflows for Apache Airflow (MWAA) provider. (🌟 ultimate)
• Added support for the GetInstanceUefiData API in the EC2 provider. (🌟 base)
• Implemented support for specifying Tags during the S3 CreateBucket operation, and added support for the TagCount field in HeadObject responses.
• Added configurable wait-time controls for CloudFormation resource polling (CFN_NO_WAIT_ITERATIONS) and reduced default sleep intervals, meaning that deploy times for large stacks should be reduced.
• Added configuration options to customise the Libvirt network (EC2_LIBVIRT_NETWORK) and storage pool (EC2_LIBVIRT_POOL) used by EC2, instead of assuming the default names. (🌟 enterprise)
• Cognito now supports enforcing HTTPS in OAuth and federated login flows by honouring USE_SSL=1, ensuring all generated authentication URLs use https://. (🌟 base)
• Added support for ECS Managed EC2 Instances capacity providers, including CRUD operations, improved status responses, and validation during task execution. (🌟 base)
• Added support for the following S3 Control tagging operations for S3 buckets:
  • ListTagsForResource
  • TagResource
  • UntagResource
• Added support for the ListLogGroups operation in CloudWatch Logs.
• EventBridge Pipes now supports input transformation for enrichment, including proper handling of JSON arrays and quote stripping for plain text templates. (🌟 ultimate)
• Application Load Balancers now support HTTPS targets in target groups, with the load balancer skipping SSL verification for HTTPS targets, matching AWS behavior where self-signed certificates are accepted. (🌟 base)
• Improved the IAM SimulatePrincipalPolicy operation to use the IAM Enforcement Engine, providing more accurate policy evaluation decisions. Support for roles and groups as principals has been added. (🌟 base)
• Network Load Balancers now support TCP listener emulation, enabling basic NLB functionality for local testing. A new proxy manager handles the creation and lifecycle of TCP proxies for NLB listeners. (🌟 base)
• LocalStack’s S3 Tables provider now includes the following enhancements: (🌟 ultimate)
  • Added support for the ListTagsForResource API.
  • Added support for encryption configuration APIs at both bucket and table levels. Actual encryption enforcement is not yet implemented.
• Added support for managing user-defined functions in Glue with the following APIs: (🌟 ultimate)
  • CreateUserDefinedFunction
  • GetUserDefinedFunction
  • UpdateUserDefinedFunction
  • DeleteUserDefinedFunction
  • GetUserDefinedFunctions
• Added support for managing column statistics for tables in Glue with the following APIs: (🌟 ultimate)
  • UpdateColumnStatisticsForTable
  • GetColumnStatisticsForTable
  • DeleteColumnStatisticsForTable

What's Changed

Exciting New Features 🎉

• S3Control: implement Tagging support for S3 Bucket by@bentsku in#13435
• [SFN] Add new TestState API capabilities by@tiurin in#13418
• Extend Moto exception translation to cover more error types by@viren-nadkarni in#13414
• Add Lambda Managed Instances by@viren-nadkarni in#13440
• Sns/v2 publish continued by@baermat in#13408
• S3: SupportEU Bucket Location Constraint for CreateBucket by@aidehn in#13450
• implemented phone ops, added tests by@baermat in#13449
• Use catalog in CloudFormation CreateStack and save errors for DescribeStack by@silv-io in#13321
• ecs/add service principal by@cloutierMat in#13474

Other Changes

• Update banner on README.md by@remotesynth in#13421
• S3: fix change in behavior in CreateBucketConfiguration by@bentsku in#13427
• S3: add support forTags inCreateBucket by@bentsku in#13428
• S3: supportTagCount inHeadObject by@bentsku in#13429
• Fix version evaluation of boto3 in asf update action by@silv-io in#13442
• chore: define explicit state containers for providers by@bentsku in#13423
• Pass DockerHub credentials to test containers by@sannya-singal in#13434
• Lambda: Validate capacity provider in create_function by@anisaoshafi in#13445
• Lambda: Raise error when function added a capacity provider by@anisaoshafi in#13447
• chore: define rest of explicit state containers for providers by@bentsku in#13433
• update kinesis-mock from 0.5.1 to 0.5.2 by@alexrashed in#13448
• fix/external client CA bundle by@cloutierMat in#13451
• [SFN][TestState] Make roleArn optional by@tiurin in#13459
• [SFN][TestState] Fix state context tests MA/MR run failure by@tiurin in#13460
• CFn: configure wait time for polling resources by@simonrw in#13455
• [SFN][TestState] Add validations for mock presence depending on state type by@tiurin in#13457
• [SFN][TestState] Add test for invalid state machine definition in test state call by@tiurin in#13446
• mypy: add moto-ext as additional-dependencies in pre-commit hook by@bentsku in#13465
• Lambda: Keep track of scaling config in store by@anisaoshafi in#13463
• SFN:TestState: Add validations for mock fields compatibility by@tiurin in#13468
• Fix use of json module as type hint by@giograno in#13372
• Expand on the typing for volume types to support Kubernetes by@simonrw in#13467
• CFn: handle updates with empty resource properties by@simonrw in#13471
• Allow redirecting test traffic to arbitrary endpoint by@dfangl in#13472
• Skip flaky Lambda streaming test by@joe4dev in#13486
• ES/OpenSearch: fix concurrent startups on fresh install by@bentsku in#13481
• ACM: Fix filtering by key type and support additional key types by@jtschladen in#13462
• CFn: remove assertion on CFN_NO_WAIT_ITERATIONS by@simonrw in#13487
• Add telemetry for Lambda Managed Instances by@joe4dev in#13466
• CFnV2: Add support for ListAWS::EC2::SubnetId parameter by@pinzon in#13473
• upgrade aws-sam-translator by@bentsku in#13490
• ESM: add '$LATEST.PUBLISHED' support for Lambda Managed Instances by@anisaoshafi in#13493
• IaC: Enable parity metrics to be captured during release by@k-a-il in#13494
• SFN:TestState: Fix hardcoded region in test state's context object test by@tiurin in#13489
• SFN:TestState: Add mock result validations for Map state by@tiurin in#13492
• Skip failing DNS unit test by@joe4dev in#13501

New Contributors

• @jtschladen made their first contribution in#13462

Full Changelog:v4.11.1...v4.12.0

Contributors