Lambda

Real function execution — Python locally, Docker for other runtimes — with layers, versions, aliases, event source mappings, and Function URLs.

REST-JSON multi-tenant 66 operations

Quick start

import boto3, io, zipfile
zf = io.BytesIO()
with zipfile.ZipFile(zf, "w") as z:
    z.writestr("app.py", "def handler(e, c): return {'ok': True}")
lam = boto3.client("lambda", endpoint_url="http://localhost:4566",
                   region_name="us-east-1",
                   aws_access_key_id="test", aws_secret_access_key="test")
lam.create_function(FunctionName="f", Runtime="python3.11",
                    Role="arn:aws:iam::000000000000:role/r",
                    Handler="app.handler", Code={"ZipFile": zf.getvalue()})
print(lam.invoke(FunctionName="f")["Payload"].read())

Supported operations

66 operations exposed by this service as of MiniStack 1.4.21. Extracted directly from the handler dispatch in the source module.

AddLayerVersionPermission AddPermission CheckpointDurableExecution CreateAlias CreateEventSourceMapping CreateFunction CreateFunctionUrlConfig DeleteAlias DeleteEventSourceMapping DeleteFunction DeleteFunctionCodeSigningConfig DeleteFunctionConcurrency DeleteFunctionEventInvokeConfig DeleteFunctionUrlConfig DeleteLayerVersion DeleteProvisionedConcurrencyConfig GetAccountSettings GetAlias GetDurableExecution GetDurableExecutionHistory GetDurableExecutionState GetEventSourceMapping GetFunction GetFunctionCodeSigningConfig GetFunctionConcurrency GetFunctionConfiguration GetFunctionEventInvokeConfig GetFunctionRecursionConfig GetFunctionUrlConfig GetLayerVersion GetLayerVersionByArn GetLayerVersionPolicy GetPolicy GetProvisionedConcurrencyConfig Invoke InvokeWithResponseStream ListAliases ListDurableExecutionsByFunction ListEventSourceMappings ListFunctionEventInvokeConfigs ListFunctions ListFunctionUrlConfigs ListLayers ListLayerVersions ListTags ListVersionsByFunction PublishLayerVersion PublishVersion PutFunctionCodeSigningConfig PutFunctionConcurrency PutFunctionEventInvokeConfig PutFunctionRecursionConfig PutProvisionedConcurrencyConfig RemoveLayerVersionPermission RemovePermission SendDurableExecutionCallbackFailure SendDurableExecutionCallbackHeartbeat SendDurableExecutionCallbackSuccess StopDurableExecution TagResource UntagResource UpdateAlias UpdateEventSourceMapping UpdateFunctionCode UpdateFunctionConfiguration UpdateFunctionUrlConfig

CloudFormation

The CloudFormation engine provisions these resource types via this service:

AWS::Lambda::Alias AWS::Lambda::EventInvokeConfig AWS::Lambda::EventSourceMapping AWS::Lambda::Function AWS::Lambda::LayerVersion AWS::Lambda::Permission AWS::Lambda::Url AWS::Lambda::Version AWS::Lambda::LayerVersionPermission

See CloudFormation engine for intrinsic support and lifecycle details.

Known limitations

SnapStart is not implemented — requests succeed as if disabled.
LAMBDA_STRICT=1 requires Docker; without Docker you'll hit Runtime.DockerUnavailable.

Source

ministack/services/lambda_svc.py

Read the source to verify the ops list above — dispatch tables and handler functions are the ground truth.

See also: all services · configuration · limitations.