Runtime.HandlerNotFound Error when mountCode: true

[Edwin-Luijten]

I'm using localstack with a docker setup (localstrack-pro:latest), and when having mountCode:true in my plugin config the lambda container that is being spun up is unable to find the code. When disabled it executes fine but then code updates are not being propagated.

I added the fix of this pull request: #215 locally.
I'm also using serverless-esbuild.

serverless.yaml

service: cms-api
configValidationMode: error

provider:
  stackName: ${env:STACK_NAME, 'serverless-framework'}-sls-middleware
  name: aws
  runtime: nodejs18.x
  stage: local
  region: ${env:AWS_DEFAULT_REGION, 'eu-central-1'}
  environment: ${file(./serverless.yml):provider.environment}
  apiGateway:
    binaryMediaTypes:
      - '*/*'
    restApiId: !Ref ApiGateway
    restApiRootResourceId:
      'Fn::GetAtt':
        - ApiGateway
        - RootResourceId

plugins:
  - serverless-esbuild
  - serverless-localstack

custom:
  stage: local
  esbuild:
    bundle: true
    minify: false
    keepOutputDirectory: true
    outputFileExtension: .mjs
    format: esm
    target: "esnext"
    platform: "node"
    exclude: ["aws-sdk"]
    banner:
      js: import { createRequire } from 'module';const require = createRequire(import.meta.url);
  localstack:
    debug: true
    edgePort: 4566
    autostart: false
    stages: [ local ]
    lambda:
      mountCode: true

functions:
  api: ${file(./serverless.yml):functions.api}

resources:
  Resources:
    DynamoDBTableCMS: ${file(./serverless.yml):resources.Resources.DynamoDBTableCMS}
    ApiGateway:
      Type: AWS::ApiGateway::RestApi
      Properties:
        Name: ApiGateway
        Tags:
          - Key: _custom_id_
            Value: cms-api

I'm using the latest version of localstack-pro image.

docker-compose.yaml

version: "3"
services:
  localstack:
    container_name: "api-localstack"
    build:
      context: ./docker/localstack
    ports:
      - "127.0.0.1:4566:4566"            # LocalStack Gateway
      - "127.0.0.1:4510-4559:4510-4559"  # external services port range
      - "127.0.0.1:53:53"                # DNS config (only required for Pro)
      - "127.0.0.1:53:53/udp"            # DNS config (only required for Pro)
      - "127.0.0.1:443:443"              # LocalStack HTTPS Gateway (only required for Pro)
    working_dir: /
    environment:
      - SERVICES=lambda,s3,sqs,iam,apigateway,dynamodb # SERVICES variable is ignored if EAGER_SERVICE_LOADING=0
      - LS_LOG=debug
      - PERSISTENCE=1
      - BUCKET_MARKER_LOCAL=hot-reload
      - LOCALSTACK_API_KEY={redacted} # only required for Pro
      - DOCKER_HOST=unix:///var/run/docker.sock
      - STACK_NAME=api
      - ENVIRONMENT=local
      - DYNAMODB_SHARE_DB=1

    volumes:
      - "./docker/localstack/volume:/var/lib/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"
      - "./:/app"

When the errors happens it keeps re spawning the lambda container until I stop it.

Logs

api-localstack | 2023-03-31T08:56:57.475 DEBUG --- [pi:$LATEST_0] l.u.c.docker_sdk_client : Creating container with attributes: {'mount_volumes': <localstack.utils.container_utils.container_client.VolumeMappings object at 0x7ff925c23880>, 'ports': None, 'cap_add': None, 'cap_drop': None, 'security_opt': None, 'dns': '127.0.0.1', 'additional_flags': '', 'workdir': None, 'privileged': None, 'labels': None, 'ulimits': None, 'command': None, 'detach': None, 'entrypoint': '/var/rapid/init', 'env_vars': {'AWS_DEFAULT_REGION': 'us-east-1', 'AWS_REGION': 'us-east-1', 'AWS_LAMBDA_FUNCTION_NAME': 'api-local-api', 'AWS_LAMBDA_FUNCTION_MEMORY_SIZE': 1024, 'AWS_LAMBDA_FUNCTION_VERSION': '$LATEST', 'AWS_LAMBDA_INITIALIZATION_TYPE': 'on-demand', 'AWS_LAMBDA_LOG_GROUP_NAME': '/aws/lambda/api-local-api', 'AWS_LAMBDA_LOG_STREAM_NAME': '2023/03/31/[$LATEST]0af9cbe7a820c0ba0db5030e64e1a184', 'AWS_ACCESS_KEY_ID': 'ASIAQAAAAAAADD2Y7UJJ', 'AWS_SECRET_ACCESS_KEY': 'yKdyaQMgFPFCyBv4nPtbiWaYIjrsvq3cV1gPFSl8', 'AWS_SESSION_TOKEN': 'FQoGZXIvYXdzEBYaD/DkcwdRjXJnysJVWiDvT8it86Tfw38AdeGKjio0Af69yx/ZcohR60kbG1Gu07EkxZO/j/s864mi/lgO5ktQrb4XVSn5GlB7gAU4Q2JOmlVCTaTXcnAvbix42UMVfkOfKHp6Prvl9yxB2aPqoy8Z2hXrr3vRAHcWwE9rFYVXn7lTDSCBfb8rLyB19Qfrhnqn35yK4URyJVgVsjHzqp0EtZvxOgSirgSo7U9OJRH/c4luhx3BxOcfyqBKKf3zxRILTx1z8VAT4QTfs7zhMJwpo+1AqWeYByodRP7XUtlRCLwts6nqdlomBDq7DzYdjJSRjSbpgRREFJGMxkDD3xE=', 'LAMBDA_TASK_ROOT': '/var/task', 'LAMBDA_RUNTIME_DIR': '/var/runtime', 'AWS_XRAY_CONTEXT_MISSING': 'LOG_ERROR', 'AWS_XRAY_DAEMON_ADDRESS': '127.0.0.1:2000', '_AWS_XRAY_DAEMON_PORT': '2000', '_AWS_XRAY_DAEMON_ADDRESS': '127.0.0.1', 'TZ': ':UTC', 'AWS_LAMBDA_FUNCTION_TIMEOUT': 6, 'LOCALSTACK_HOSTNAME': '172.30.0.2', 'EDGE_PORT': '443', 'AWS_ENDPOINT_URL': 'http://172.30.0.2:443', 'LOCALSTACK_RUNTIME_ID': '0af9cbe7a820c0ba0db5030e64e1a184', 'LOCALSTACK_RUNTIME_ENDPOINT': 'http://172.30.0.2:443/_localstack_lambda/0af9cbe7a820c0ba0db5030e64e1a184', '_HANDLER': '.esbuild/.build/src/handler/http.handle', 'AWS_EXECUTION_ENV': 'Aws_Lambda_nodejs18.x', 'ENVIRONMENT': 'local', 'LOCALSTACK_HOT_RELOADING_PATHS': '/var/task', 'LOCALSTACK_ENABLE_DNS_SERVER': '1', 'NODE_TLS_REJECT_UNAUTHORIZED': '0'}, 'image_name': 'public.ecr.aws/lambda/nodejs:18', 'interactive': None, 'name': 'api-localstack-lambda-api-local-api-0af9cbe7a820c0ba0db5030e64e1a184', 'network': 'cms_api_default', 'platform': 'linux/amd64', 'remove': None, 'self': <localstack.utils.container_utils.docker_sdk_client.SdkDockerClient object at 0x7ff96b9b6b30>, 'tty': None, 'user': None} api-localstack | 2023-03-31T08:56:57.518 DEBUG --- [pi:$LATEST_0] localstack.packages.api : Installation of awslambda-runtime skipped (already installed). api-localstack | 2023-03-31T08:56:57.518 DEBUG --- [pi:$LATEST_0] l.u.c.docker_sdk_client : Copying file /var/lib/localstack/lib/awslambda-runtime/v0.1.16-pre/x86_64/. into api-localstack-lambda-api-local-api-0af9cbe7a820c0ba0db5030e64e1a184:/ api-localstack | 2023-03-31T08:56:57.824 DEBUG --- [pi:$LATEST_0] l.u.c.docker_sdk_client : Starting container api-localstack-lambda-api-local-api-0af9cbe7a820c0ba0db5030e64e1a184 api-localstack | 2023-03-31T08:56:57.827 DEBUG --- [ asgi_gw_0] l.u.c.docker_sdk_client : Removing container: api-localstack-lambda-api-local-api-9de9563801ea86a2fc7cb199626b3200 api-localstack | 2023-03-31T08:56:57.946 INFO --- [ asgi_gw_0] localstack.request.http : POST /_localstack_lambda/9de9563801ea86a2fc7cb199626b3200/status/9de9563801ea86a2fc7cb199626b3200/error => 202 api-localstack | 2023-03-31T08:56:58.250 DEBUG --- [pi:$LATEST_0] l.u.c.container_client : Getting ipv4 address for container api-localstack-lambda-api-local-api-0af9cbe7a820c0ba0db5030e64e1a184 in network cms_api_default. api-localstack | 2023-03-31T08:56:58.421 WARN --- [ asgi_gw_0] l.s.a.i.executor_endpoint : Execution environment startup failed: {"errorType":"Runtime.HandlerNotFound","errorMessage":".esbuild/.build/src/handler/http.handle is undefined or not exported","trace":["Runtime.HandlerNotFound: .esbuild/.build/src/handler/http.handle is undefined or not exported"," at UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1035:15)"," at async start (file:///var/runtime/index.mjs:1195:23)"," at async file:///var/runtime/index.mjs:1201:1"]} api-localstack | 2023-03-31T08:56:58.421 DEBUG --- [ asgi_gw_0] l.u.c.docker_sdk_client : Stopping container: api-localstack-lambda-api-local-api-0af9cbe7a820c0ba0db5030e64e1a184

Screenshot of the built code:

Screenshot of the lambda on app.localstack.cloud (this is with mountCode: false)

Screenshot of the lambda on app.localstack.cloud ( this is with mountCode: true)