Lambda

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

REST (XML/JSON) multi-tenant 48 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

48 operations exposed by this service as of MiniStack 1.3.14. Extracted directly from the handler dispatch in the source module.

create_alias create_esm create_function create_function_url_config DELETE delete_alias delete_esm delete_event_invoke_config delete_function delete_function_concurrency delete_function_url_config delete_layer_version delete_provisioned_concurrency GET get_account_settings get_alias get_docker_client get_esm get_event_invoke_config get_func_record_for_qualifier get_function get_function_concurrency get_function_config get_function_url_config get_layer_version get_layer_version_by_arn get_layer_version_policy get_policy get_provisioned_concurrency list_aliases list_esms list_function_event_invoke_configs list_function_url_configs list_functions list_layer_versions list_layers list_tags list_versions POST PUT put_event_invoke_config put_function_concurrency put_provisioned_concurrency update_alias update_code update_config update_esm update_function_url_config

CloudFormation

The CloudFormation engine provisions these resource types via this service:

AWS::Lambda::Function AWS::Lambda::Version AWS::Lambda::Alias AWS::Lambda::Permission AWS::Lambda::Layer AWS::Lambda::EventSourceMapping

See CloudFormation engine for intrinsic support and lifecycle details.

Known limitations

CloudWatch metrics (Invocations, Errors, Duration, Throttles) are not emitted.
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:542-591

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

See also: all services · configuration · limitations.