Your source for the latest features, improvements, and fixes across LocalStack products, all in one place.
Create and populate Iceberg tables directly from query results, locally.
CREATE TABLE AS SELECT now works for Iceberg tables, with both explicit schemas and inferred shapes.POSITION / CHARINDEX for substring lookups.LEFT, RIGHT, LENGTH, and LEN aliases.DISTINCT.LocalStack for AWS 4.12 adds support for Lambda Managed Instances, bringing predictable costs and specialised compute hardware into your local Lambda workflows.
TestState ergonomics let you exercise individual states in isolation.AWS 4.11 closes parity gaps across messaging, lakehouse, and CI/CD services so more workflows just work locally.
pgvector support, unlocking local testing of ML retrieval workloads.GENERATOR for synthesising rows and sequences in tests.SIGN for sign-of-value semantics on numerics.PI for the mathematical constant.A focused set of additions that bring everyday Snowflake workflows closer to home.
SELECT * EXCLUDE (...) for clean column exclusions in projections.FOREIGN KEY constraints during CREATE TABLE.LocalStack 4.10 introduces a native S3 Tables provider with full Apache Iceberg REST API support, unlocking modern data lakehouse workflows locally.
Snowflake Scripting parity continues to mature, letting you author and exercise advanced procedural logic locally.
RESULTSET variables for cursor and table-like result handling.EXECUTE IMMEDIATE for dynamic SQL construction at runtime.SHOW OBJECTS and SHOW VIEWS now align with Snowflake schema, scopes, and LIKE clauses.information_schema.tables for quoted/unquoted names.RETURNING clauses inside procedures with INSERT statements are honored.TIMELIMIT parameter support added to GENERATOR(...).AWS 4.9 hardens the foundations of LocalStack with refreshed runtime dependencies and stronger AWS alignment.
Snowflake 1.2 brings visual data pipelines to your local Snowflake stack via embedded Apache NiFi.
AWS 4.8 unlocks one-click remote debugging of Lambda functions with the AWS Toolkit for VS Code.
UPDATE operations and resource lifecycles.ElastiCache and MemoryDB now support the Valkey engine as an alternative to Redis. Set REDIS_CONTAINER_MODE=1 when starting the container to enable it.
valkey as the engine when creating ElastiCache replication groups and MemoryDB clusters.Engine and EngineVersion fields in CreateReplicationGroup and CreateCluster now recognize valkey.7.2.10, Valkey 7.2.10) for DockerHub compatibility.A new native Organizations provider replaces the legacy Moto-based implementation for managing multi-account and multi-organization setups locally.
CreateOrganization, CreateAccount, and CreateOrganizationalUnit.EnableAWSServiceAccess, register delegated administrators, and tag organizational resources.InviteAccountToOrganization, AcceptHandshake) are not yet supported.LocalStack now supports the AppSync Events API, a serverless WebSocket-based API for subscribing to and publishing real-time events.
CreateApi and define channel namespaces for routing messages.domain and path endpoints registered for targeting your API.SnsTopicName is set in CreateTrail or UpdateTrail, and populates requestParameters and responseElements for most events.1.33 (now the default), Load Balancer Controller with target-mode set to ip, and the DescribeClusterVersions API.3.0.0 and now supports the UpdateKinesisStreamingDestination API.CreateTable accepts Name and OpenTableFormatInput, with TableInput now optional.GetTokensFromRefreshToken, KMS ImportKeyMaterial supports RSA_AES_KEY_WRAP_SHA_256, and Route53 maps FQDNs with trailing dots for ELB routing.ipAddressType field (ipv4 or dualstack) via CreateRestApi and CreateApi.APPSYNC_JS_LIBS_VERSION=latest and =refresh are no longer supported, use a tagged version or commit from appsync-utils.localstack/localstack to the localstack/localstack-pro image and requires an authenticated account.Snowflake 1.1 simplifies bootstrapping the emulator with a single CLI flag, plus first-class Snowflake REST APIs.
--stack CLI flag for simplified emulator management.LocalStack 4.6 adds a provider for AWS CodeArtifact, a managed artifact repository service, so you can store, publish, and share packages locally.
Glue jobs can now run as pods in your Kubernetes cluster instead of separate Docker-based execution.
GLUE_JOB_EXECUTOR_PROVIDER to v2 and CONTAINER_RUNTIME to kubernetes.DOCKER_GLOBAL_IMAGE_PREFIX environment variable.The AppSync JavaScript resolver executor now uses a lightweight Node.js runtime package instead of a Docker container.
console.log support in resolver code, with output sent to LocalStack logs.AWS_PROXY SQS first-class integrations for SendMessage, ReceiveMessage, PurgeQueue, and DeleteMessage.UpdatePipe can now modify targets, target parameters, and enrichment configurations, in addition to source parameters.DeleteRouteRequestParameter operation.UpdateMethodResponse API and fixes VTL $input.path and $input.json edge cases.PutMetricsConfiguration, GetMetricsConfiguration, DeleteMetricsConfiguration, and ListBucketMetricsConfigurations for CloudWatch request metrics (mocked, up to 1,000 per bucket).COMPLIANCE mode via PutObjectRetention, fixes UploadPartCopy checksums, and completes ObjectParts in GetObjectAttributes._custom_id_ tag on CreateDistributionWithTags.ImportSourceCredentials, ListSourceCredentials, DeleteSourceCredentials), and custom images via CODEBUILD_ENABLE_CUSTOM_IMAGES.UpdateFileSystem and UpdateFileSystemProtection; KMS adds ReEncrypt; EKS adds DescribeClusterVersions.x-localstack header, toggleable via LOCALSTACK_RESPONSE_HEADER_ENABLED.K8S_WAIT_FOR_POD_READY_TIMEOUT, K8S_WAIT_FOR_DEPLOYMENT_READY_TIMEOUT, and K8S_WAIT_FOR_SERVICE_READY_TIMEOUT.StartSyncExecution; DocumentDB supports MongoDB transactions in single-node replica mode; SQS propagates X-Amzn-Trace-Id to the AWSTraceHeader message attribute.LocalStack 4.5 adds three new providers for AWS CI/CD services so you can run build, pipeline, and deployment workflows locally.
CodeBuild provider compiles source from S3, configures IAM roles, and writes build artifacts to target buckets. The build agent runs inside a Docker container.CodePipeline provider runs end-to-end pipeline executions with action types including S3 source and deploy, CodeBuild integration, and CodeConnections with GitHub, defined in JSON.CodeDeploy provider supports creating applications, deployment configurations, deployment groups, and deployments against EC2, Lambda, and ECS targets (fully mocked).REST APIs in the API Gateway provider gain new emulation features.
Response Overrides from Request Templates.#set operations.17.5.ManageMasterPassword API for automated DB credential management.DescribeEngineDefaultParameters and DescribeEngineDefaultClusterParameters.RDS_PG_MAX_CONNECTIONS environment variable to set the maximum connections for PostgreSQL instances.GetSecurityGroupsForVpc API to retrieve security groups for a specific VPC.DescribeAvailabilityZones filtering now aligns more closely with AWS behavior.UpdatePipe support in Pipes (source parameters only) and the ListRuleNamesByTarget API.AWS::Lambda::Version now supports the ProvisionedConcurrencyConfig property; Lambda GetFunction returns reserved_concurrent_executions.DeleteDistribution, Elastic Load Balancing supports DescribeCapacityReservation, and EKS integrates with autoscaling and security groups.KINESIS_MOCK_PROVIDER_ENGINE environment variable (node or scala).The Snowflake emulator now integrates with Polaris Catalog, an open-source catalog for Apache Iceberg tables, via a LocalStack fork of the Apache Polaris image published as localstack/polaris.
8181 and 8182, pointing it at the emulator with AWS_ENDPOINT_URL=http://localhost:4566.CREATE CATALOG INTEGRATION with external volumes backed by local S3 buckets.Foundational support lets you build and run Snowflake Native Apps, including ones with Streamlit frontends, locally via snow app run.
CREATE APPLICATION PACKAGE, ALTER APPLICATION PACKAGE, DROP APPLICATION PACKAGE, and SHOW APPLICATION PACKAGES.GRANT APPLICATION ROLE.CREATE, ALTER, DESCRIBE, DROP, SHOW, and TRUNCATE MATERIALIZED VIEW.CREATE STORAGE INTEGRATION, DESCRIBE STORAGE INTEGRATION, and DROP STORAGE INTEGRATION for local S3 access.CREATE TABLE ... CLONE and CREATE DATABASE ... CLONE (schemas and hybrid tables not yet supported).BEGIN, COMMIT, ROLLBACK, CURRENT_TRANSACTION(), and SHOW TRANSACTIONS.AS clause or staged JAR files via the IMPORTS clause, alongside the existing Python and JavaScript support.ALTER USER ... SET RSA_PUBLIC_KEY (key contents are mocked, not validated)..sf.sql scripts at the BOOT, START, READY, or SHUTDOWN container stages.SF_DEFAULT_USER and SF_DEFAULT_PASSWORD environment variables.EXECUTE TASK, REGEXP_SUBSTR, EQUAL_NULL, OBJECT_CONSTRUCT_KEEP_NULL, DATEADD, TO_TIMESTAMP, DIV0NULL, and EXECUTE IMMEDIATE.COPY INTO (added HEADER and FIELD_OPTIONALLY_ENCLOSED_BY), MERGE INTO, BEGIN..END blocks, and the Snowflake Go, JDBC, and SnowSQL clients.DB_CONNECTION_PER_SESSION.LocalStack adds a provider for Amazon Verified Permissions, letting you define and test fine-grained authorization for custom applications locally.
IdentitySource; external OIDC providers are not yet supported.PutSchema and incomplete JWT checks (issuer, signature, expiration, jwks.json).LocalStack can now replace AWS Step Functions Local for testing state machines with mocked service integrations.
SFN_MOCK_CONFIG at a mounted mock config file to define mocked task states.ListStateMachineAliases pagination via --next-token and --max-results.A new native RDS provider replaces the previous Moto-based CRUD operations and is now the default.
Glue jobs can now run inside Docker containers using the aws-glue-libs image instead of a pre-packaged Spark binary.
GLUE_JOB_EXECUTOR=docker and GLUE_JOB_EXECUTOR_PROVIDER=v2 to enable it.0.9, 1.0, and 2.0.IAM gains service-specific credential APIs and additional condition keys for policy testing.
CreateServiceSpecificCredential, ListServiceSpecificCredentials, UpdateServiceSpecificCredential, ResetServiceSpecificCredential, and DeleteServiceSpecificCredential.iam:PermissionBoundary, aws:RequestTag, aws:TagKeys, sts:ExternalId, iam:AWSServiceName, aws:PrincipalIsAWSService, aws:PrincipalServiceName, and aws:username.custom_key_material for ECC keys, preserves key material history across RotateKeyOnDemand, aligns PSS salt length with RFC 4055, and adds dry_run to GenerateDataKeyPair and GenerateDataKeyPairWithoutPlaintext.IncludeBody parameter and runtime validation for Python and Node.js.TagResource, UntagResource, and ListTagsForResource.USER_AUTH flow, and EventBridge X-Ray trace ID propagation to Lambda and API Gateway.LocalStack 4.3 adds an experimental CloudFront Lambda@Edge emulation, enabled by setting CLOUDFRONT_LAMBDA_EDGE=1.
CreateDistribution API.viewer-request and viewer-response support, no Include Body option, no UpdateDistribution/DeleteDistribution, and no persistence across restarts.MapRun execution works correctly by making map run components stateless with proper worker creation for all nested map runs.ItemSelector declaration bodies in both JSONPath and JSONata modes.ListQueues via MaxResults and NextToken.AWSServiceRoleFor<service>) with policy attachment.StateFunction parsing, replacing the previous mermaid renderer.EKS_K3S_FLAGS variable to customize the k3s cluster.REQUIRED.BatchSize and MaximumBatchingWindowInSeconds.AWS::ECR::Repository, SSO Admin adds ListTagsForResource, and SSM adds filters in DescribeInstanceInformation.A new tool copies AWS resources directly into a running LocalStack instance without recreating them or editing your infrastructure stacks.
LocalStack adds a mock provider for AWS Shield, the managed DDoS protection service.
ollama., for example ollama.deepseek-r1.BEDROCK_PULL_MODELS option pulls a comma-separated list of model IDs from the Ollama models library on startup.IAMDatabaseAuthenticationEnabled=true, requiring signed READ, WRITE, or DELETE operations for users setting LOCALSTACK_ENFORCE_IAM and LOCALSTACK_IAM_SOFT_MODE.init-pods.d.GATEWAY_LISTEN rather than only the first port.MWAA_DOCKER_FLAGS.LocalStack 4.1 ships a new MSAF provider that replaces the previous Kinesis Data Analytics v2 implementation and runs Flink applications locally.
kinesisanalyticsv2 with AWS-compatible API operations.PROVIDER_OVERRIDE_KINESISANALYTICSV2=legacy to keep the older mock provider.The Step Functions provider now emulates the Amazon States Language additions for variables and JSONata.
JSONata as an alternative query and transformation language to JSONPath.ItemsPath in Distributed Map states, and ContextObject bindings in ErrorPath/CausePath.A preview release of the official Java SDK gives programmatic access to LocalStack's internal developer endpoints.
OR logic and SNS topic actions only.event-ruler preview; remove the EVENT_RULE_ENGINE config to drop the legacy engine.PutObject supports the CRC64NVME checksum algorithm, FULL_OBJECT checksum type for multipart uploads, and the IfMatch conditional write parameter on PutObject and CompleteMultipartUpload.--extra-jars option.CREATE/DELETE for AWS::MWAA::Environment and AWS::KinesisAnalyticsV2::Application resources, plus the NoEcho parameter attribute./_localstack/swagger.No releases match the selected filter.
