Hi,

first of all thank you for your tutorial which is the only one dealing about fastapi and serverless out there.

I'm having problem at the step: Stage: Build the deployment package

When I build, I get the following error:

Final incompatible: {pydantic==1.2(wheel), websockets==8.1(wheel), cryptography==2.8(wheel), uvloop==0.14.0(wheel)}
Final missing wheels: {uvloop==0.14.0(wheel)}
PythonPipBuilder:ResolveDependencies failed
Traceback (most recent call last):
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/actions.py", line 42, in execute
    requirements_path=self.manifest_path,
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 137, in build_dependencies
    self._dependency_builder.build_site_packages(requirements_path, artifacts_dir_path, scratch_dir_path)
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 201, in build_site_packages
    raise MissingDependencyError(packages_without_wheels)
aws_lambda_builders.workflows.python_pip.packager.MissingDependencyError: {uvloop==0.14.0(wheel)}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflow.py", line 269, in run
    action.execute()
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/actions.py", line 45, in execute
    raise ActionFailedError(str(ex))
aws_lambda_builders.actions.ActionFailedError: {uvloop==0.14.0(wheel)}
Builder workflow failed
Traceback (most recent call last):
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/actions.py", line 42, in execute
    requirements_path=self.manifest_path,
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 137, in build_dependencies
    self._dependency_builder.build_site_packages(requirements_path, artifacts_dir_path, scratch_dir_path)
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/packager.py", line 201, in build_site_packages
    raise MissingDependencyError(packages_without_wheels)
aws_lambda_builders.workflows.python_pip.packager.MissingDependencyError: {uvloop==0.14.0(wheel)}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflow.py", line 269, in run
    action.execute()
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflows/python_pip/actions.py", line 45, in execute
    raise ActionFailedError(str(ex))
aws_lambda_builders.actions.ActionFailedError: {uvloop==0.14.0(wheel)}

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/__main__.py", line 126, in main
    mode=params.get("mode", None),
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/builder.py", line 125, in build
    return workflow.run()
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflow.py", line 76, in wrapper
    func(self, *args, **kwargs)
  File "/var/lang/lib/python3.7/site-packages/aws_lambda_builders/workflow.py", line 276, in run
    raise WorkflowFailedError(workflow_name=self.NAME, action_name=action.NAME, reason=str(ex))
aws_lambda_builders.exceptions.WorkflowFailedError: PythonPipBuilder:ResolveDependencies - {uvloop==0.14.0(wheel)}
Build inside container returned response {"jsonrpc": "2.0", "id": 1, "error": {"code": 400, "message": "PythonPipBuilder:ResolveDependencies - {uvloop==0.14.0(wheel)}"}}

Build Failed
Sending Telemetry: {'metrics': [{'commandRun': {'awsProfileProvided': False, 'debugFlagProvided': True, 'region': '', 'commandName': 'sam build', 'duration': 123589, 'exitReason': 'BuildError', 'exitCode': 1, 'requestId': 'd943b1f2-73e0-42d3-b8fb-2e94d5436dd4', 'installationId': 'acc6ee82-60bf-4a06-a81c-405c230a0da1', 'sessionId': '3600cf82-fe9d-4961-9a97-7ad8a856986b', 'executionEnvironment': 'CLI', 'pyversion': '3.7.6', 'samcliVersion': '0.41.0'}}]}
HTTPSConnectionPool(host='aws-serverless-tools-telemetry.us-west-2.amazonaws.com', port=443): Read timed out. (read timeout=0.1)
Error: PythonPipBuilder:ResolveDependencies - {uvloop==0.14.0(wheel)}

I've tried to look online and nothing very significant.

Do you have any idea what could be wrong ?

Thanks

In my customized version of your project, calls to my API will return records from a PostgreSQL RDS database. Do you know the best way to access the database connection string without hard-coding them into my project?

I was thinking that maybe the simplest way is creating encrypted environment variables for the lambda function, but I also am not sure how to implement this following the style of your project.

Thank you for your help.

Hi (again),

I've managed to deploy properly your app (I was trying mine at first and I successfully deployed it, but I was unable to access the /docs page, so decided to go with yours).

With your app, cloning your project, and building, packaging and deploying it, I have an error when access the /docs page, is that expected ?

FYI that's the same error I also have when accessing my project, even if I put maximum RAM it doesn't change anything.

Looking at the log doesn't give anything relevant (or maybe I didn't look at the proper place ?) START RequestId: 8681588b-b3c5-4827-a94a-0e3b4cbddaf0 Version: $LATEST END RequestId: 8681588b-b3c5-4827-a94a-0e3b4cbddaf0 REPORT RequestId: 8681588b-b3c5-4827-a94a-0e3b4cbddaf0 Duration: 3.82 ms Billed Duration: 100 ms Memory Size: 128 MB Max Memory Used: 85 MB Init Duration: 562.30 ms

I can only see lines like this

Would you have any idea ?

Thanks

Edit: just tried to access the /ping, and it works ! Why isn't it the case with /docs ?

First of all, thank you very much for your tutorial. I was able to deploy your example project to AWS, and when I use the URL with /prod/ping I get the expected result:

{ ping: "pong!" }

However, when I try to use the URL with /prod/docs or prod/redoc I get a "Failed to load API definition" error.

Any ideas why this may be happening?

Wondering if you had success running start-api - I am using ptvsd

❯ sam local start-api

Mounting FastapiExampleLambda at http://127.0.0.1:3000/{proxy+} [DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT]
You can now browse to the above endpoints to invoke your functions. You do not need to restart/reload SAM CLI while working on your functions, changes will be reflected instantly/automatically. You only need to restart SAM CLI if you update your AWS SAM template
2020-08-22 15:47:14  * Running on http://127.0.0.1:3000/ (Press CTRL+C to quit)
Invoking example_app.main.handler (python3.8)
Failed to download a new amazon/aws-sam-cli-emulation-image-python3.8:rapid-1.0.0 image. Invoking with the already downloaded image.
Mounting /Users/dwbelliston/code/learn/fastapi-aws-lambda-example/.aws-sam/build/FastapiExampleLambda as /var/task:ro,delegated inside runtime container
START RequestId: 19059eac-f60f-13d2-72c7-e958e53e642e Version: $LATEST
[INFO]	2020-08-22T21:47:22.342Z	19059eac-f60f-13d2-72c7-e958e53e642e	Waiting for application startup.
[INFO]	2020-08-22T21:47:22.342Z	19059eac-f60f-13d2-72c7-e958e53e642e	LifespanCycleState.STARTUP:  'lifespan.startup.complete' event received from application.
[INFO]	2020-08-22T21:47:22.343Z	19059eac-f60f-13d2-72c7-e958e53e642e	Application startup complete.
[INFO]	2020-08-22T21:47:22.343Z	19059eac-f60f-13d2-72c7-e958e53e642e	HTTP event received.
[INFO]	2020-08-22T21:47:23.92Z	19059eac-f60f-13d2-72c7-e958e53e642e	HTTPCycleState.REQUEST:  'http.response.start' event received from application.
[INFO]	2020-08-22T21:47:23.92Z	19059eac-f60f-13d2-72c7-e958e53e642e	HTTPCycleState.RESPONSE:  'http.response.body' event received from application.
[ERROR]	2020-08-22T21:47:23.92Z	19059eac-f60f-13d2-72c7-e958e53e642e	Exception in 'http' protocol.
Traceback (most recent call last):
  File "/var/task/mangum/protocols/http.py", line 79, in run
    await app(self.scope, self.receive, self.send)
  File "/var/task/fastapi/applications.py", line 179, in __call__
    await super().__call__(scope, receive, send)
  File "/var/task/starlette/applications.py", line 111, in __call__
    await self.middleware_stack(scope, receive, send)
  File "/var/task/starlette/middleware/errors.py", line 181, in __call__
    raise exc from None
  File "/var/task/starlette/middleware/errors.py", line 159, in __call__
    await self.app(scope, receive, _send)
  File "/var/task/starlette/exceptions.py", line 82, in __call__
    raise exc from None
  File "/var/task/starlette/exceptions.py", line 71, in __call__
    await self.app(scope, receive, sender)
  File "/var/task/starlette/routing.py", line 566, in __call__
    await route.handle(scope, receive, send)
  File "/var/task/starlette/routing.py", line 227, in handle
    await self.app(scope, receive, send)
  File "/var/task/starlette/routing.py", line 41, in app
    response = await func(request)
  File "/var/task/fastapi/routing.py", line 182, in app
    raw_response = await run_endpoint_function(
  File "/var/task/fastapi/routing.py", line 135, in run_endpoint_function
    return await run_in_threadpool(dependant.call, **values)
  File "/var/task/starlette/concurrency.py", line 34, in run_in_threadpool
    return await loop.run_in_executor(None, func, *args)
  File "/var/lang/lib/python3.8/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/var/task/example_app/main.py", line 29, in pong
    import ptvsd; ptvsd.enable_attach(address=('0.0.0.0', 5858), redirect_output=True); ptvsd.wait_for_attach(); ptvsd.break_into_debugger()
  File "/var/task/ptvsd/attach_server.py", line 101, in enable_attach
    ptvsd_enable_attach(address)
  File "/var/task/ptvsd/_remote.py", line 59, in enable_attach
    daemon = install(pydevd,
  File "/var/task/ptvsd/pydevd_hooks.py", line 128, in install
    daemon = Daemon(**kwargs)
  File "/var/task/ptvsd/daemon.py", line 503, in __init__
    super(Daemon, self).__init__(wait_for_user, **kwargs)
  File "/var/task/ptvsd/daemon.py", line 100, in __init__
    self._install_exit_handlers()
  File "/var/task/ptvsd/daemon.py", line 425, in _install_exit_handlers
    self._exithandlers.install()
  File "/var/task/ptvsd/exit_handlers.py", line 62, in install
    self._install_signal_handler()
  File "/var/task/ptvsd/exit_handlers.py", line 103, in _install_signal_handler
    orig[sig] = signal.signal(sig, self._signal_handler)
  File "/var/lang/lib/python3.8/signal.py", line 47, in signal
    handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
ValueError: signal only works in main thread[INFO]	2020-08-22T21:47:23.107Z	19059eac-f60f-13d2-72c7-e958e53e642e	Waiting for application shutdown.
[INFO]	2020-08-22T21:47:23.108Z	19059eac-f60f-13d2-72c7-e958e53e642e	LifespanCycleState.SHUTDOWN:  'lifespan.shutdown.complete' event received from application.

When the docker corresponding to this repo is built, pushed to ECR, and deployed on Lamda. I am facing the following error: Couldn't find valid bootstrap(s): [uvicorn]", "errorType": "Runtime.InvalidEntrypoint"

Thanks for the deployment info for FastAPI on Amazon Lambda. Really appreciated.

Just curious: do you know if Websockets will work?

https://www.serverless.com/blog/framework-release-v138-websockets