Deploy FastAPI on AWS Lambda | In 9 MINUTES

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FastAPI has taken the Python community by storm with its high performance, ease of use, and automatic validation. In this super-condensed tutorial, we’re marrying FastAPI with the mighty AWS Lambda for serverless bliss!
🛠️ What You'll Learn 🛠️
✅ How to create a simple FastAPI application
✅ How to set up and configure AWS Lambda
✅ Deploying FastAPI on AWS Lambda
✅ Best practices and troubleshooting tips
⚡️Commands from the video:
1. pip3 install -t dependencies -r requirements.txt
2. (cd dependencies; zip ../aws_lambda_artifact.zip -r .)
3. zip aws_lambda_artifact.zip -u main.py
🎥 React + FastAPI: • How to build a React +...
🎥 MongoDB + FastAPI: • Unlocking the Power of...
🎥 MySQL + FastAPI: • How to build a FastAPI...
🎥 PostgreSQL + FastAPI: • How to build a FastAPI...
===========================
🎓 Courses can be found:
FastAPI Beginner & Advanced: www.udemy.com/course/fastapi-...
Learn Chatbot Development: www.udemy.com/course/the-comp...
===========================
🛒 GEAR & RECOMMENDED BOOKS: kit.co/codingwithroby
👨‍💻 Hi, I am Eric!👨‍💻
Hey! I’m a seasoned developer and cloud enthusiast. I love sharing my knowledge and helping others to discover the exciting world of programming and cloud technologies. For more tutorials, tips, and tech magic, don’t forget to hit that subscribe button and ring the bell for notifications!
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#fastapi #lambda #python

Опубликовано:

8 июл 2023

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Комментарии : 119

@tntmurphyfever Месяц назад

Really great tutorial. Thank you so much for sharing. FYI - to people who may be reading the comments - if you setup your FastApi with .env locally and are running with dotenv, you will need to change all those os.getenv() to ENV_VAR = os.environ['NAME'] in lambda.

@codingwithroby Месяц назад

Thank you! Also I appreciate you dropping this to help other students 🙂

@santoshturamari6741 18 дней назад

Thanks, it is a great tutorial. In a short video, you explained the process nicely.

@codingwithroby 18 дней назад

Thank you!

@FatimaHABIB-jm4ji 9 месяцев назад

Thanks Eric for this great tutorial ; I have a question though; I could not install zip " × python setup.py egg_info did not run successfully. │ exit code: 1 ╰─> [9 lines of output]" I tried every possible solution proposed online; anyone have faced this error while installing this package ? Thanks

@Welcomevideo-je3rm 18 дней назад

Fantastic tutorial! I really appreciate your work.

@codingwithroby 17 дней назад

Woot Woot!

@edwardwong654 3 месяца назад

The Lambda function worked, but when I uploaded the zip file, I got an "internal server error" which I traced to "errorMessage": "Unable to import module 'main': No module named 'pydantic_core._pydantic_core' ". Any ideas?

@sbussisodube1084 Месяц назад

had the same issue. I retried the video and this time I removed all dependencies in the requirements.txt file besides just fasapi and mangum after pip freeze > requirements.txt and it worked. video mark 1:04

@sbussisodube1084 Месяц назад

package issue

@Loco-Poco 4 месяца назад

I am getting "errorMessage": "Unable to import module 'main': No module named 'pydantic_core._pydantic_core'",

@vini1520 4 месяца назад

pip3 install -r requirements.txt --platform manylinux2014_x86_64 --target=dependencies --implementation cp --python-version 3.10 --only-binary=:all: --upgrade openai

@vini1520 4 месяца назад

try to use this command 🙂

@deveshmishra6119 3 месяца назад

Hey I'm getting the same problem how you resolved it?

@simranverma7480 3 месяца назад

@@deveshmishra6119 how can i resolve

@marcoviera7120 3 месяца назад

Include architecture in your pip install commands. e.g: pip install \ --platform manylinux2014_x86_64 \ --target=my-lambda-function \ --implementation cp \ --python-version 3.9 \ --only-binary=:all: --upgrade \ pandas

@andresguzman8816 4 месяца назад

nice video, man, really helpful

@codingwithroby 4 месяца назад

Awesome! You are welcome

@sulaiman.micheal 11 месяцев назад

Thanks. I appreciate this.

@codingwithroby 11 месяцев назад

Glad it was helpful!

@user-wt8jk2bu3r 8 месяцев назад

great video , very high quality also

@codingwithroby 8 месяцев назад

Much appreciated! I am glad you were able to get value 🙂

@EdwardSapp 6 месяцев назад

What if you have multiple routers added to the main app and each router has several endpoints. Does this still work?

@akcelero 3 месяца назад

as far as I was able to check - yes works without any problem

@HashtagTiluda 8 месяцев назад

This is amazing! Was wondering, what if my FastAPI app has multiple folders and files? How should I create the artifact in that case?

@codingwithroby 8 месяцев назад

You should still be able to do the exact same thing, but you will want to add the other files along with main.

@zeki7540 Год назад

That's great!

@codingwithroby Год назад

Thanks! Glad you were able to find value :-)

@excuseop9339 8 месяцев назад

what if we have another folder . Do i need add folder using this "zip aws_lambda_artifact.zip -u folder_name"

@codingwithroby 8 месяцев назад

Yup!

@esgosar 7 месяцев назад

Thanks!

@codingwithroby 7 месяцев назад

You bet!

@rohanalmighty 26 дней назад

Great Video I'd recommend using the FastAPI version that is shown in this video, else things might not work, didn't work in my case. How do I set restrictions so that nobody can hit my api too many times and I get a bill sent by AWS.

@codingwithroby 26 дней назад

If you want to add it in the code you can implement Rate Limiting. One of the most popular libraries for this is: pypi.org/project/ratelimiter/

@6Diego1Diego9 2 месяца назад

This actually worked, Gemini was giving me wrong information.

@codingwithroby 2 месяца назад

Eric > AGI

@shalineesharma8704 6 месяцев назад

Wow 🤩

@willk7471 10 месяцев назад

Nice video. Is this something that will interact with a database as well?

@codingwithroby 10 месяцев назад

Of course! You can do this exact same thing if you are using SQLite but if you are using a different type of database you just need to make sure all the connections are setup beforehand. If you need to see how to connect FastAPI to databases, I have multiple videos for different database you may find helpful 🙂

@ragefurious5650 11 месяцев назад

this is dope but is there any way i could get the windows variation of some of these console lines?

@codingwithroby 11 месяцев назад

Do the commands not work for Windows?

@6Diego1Diego9 2 месяца назад

they should work in Powershell

@user-ju9fj1ob5v 10 месяцев назад

AMAZING tutorial! 👏

@codingwithroby 10 месяцев назад

Glad you enjoyed it! Woot woot!

@user-ju9fj1ob5v 10 месяцев назад

I would like to host the frontend files on an S3 bucket, but I'm not finding any tips on how to make this work. Would you have any material on that?@@codingwithroby

@user-ju9fj1ob5v 10 месяцев назад

Well, just as I wrote the last comment I thought that I can just specify the S3 URL as path for the templates and it will load as if it were on the same local as the app (that in my case will be in lambda)

@user-ni5tt8wh2b 4 месяца назад

did you mean to delete `uvicorn` from the generated `requirements.txt` file? that came w/ the install of fastapi?

@user-ni5tt8wh2b 4 месяца назад

around 1'30" into the video

@vini1520 4 месяца назад

@@user-ni5tt8wh2b Below are my requirements fastapi==0.110.0 mangum==0.17.0

@antonioclevenielsonvieirad2173 4 месяца назад

hello my friend what theme are you using in vscode?

@codingwithroby 3 месяца назад

One Dark Pro - it is an theme that you need download!

@TheChihuhua 2 месяца назад

Nice!

@codingwithroby 2 месяца назад

Thank you! Cheers!

@adamrichic8753 8 месяцев назад

Very well, thanks a lot

@codingwithroby 8 месяцев назад

You are welcome!

@thanhquachable 9 месяцев назад

what if we update our code ? we create and upload a new zip file?

@codingwithroby 9 месяцев назад

Yes, in this video I didn't go over how to setup lambda deployments automatically. If you want to do this I'd look at GitHub actions to communicate to your lambda

@jdrcreations1947 Месяц назад

I get internal server error despite changing my handler details. What could be the reason

@matthewmolinar Месяц назад

same

@hemantsah8567 8 месяцев назад

Just curious. Knowing the functionality of Lambda that it is serverless(instances are spawned on request), should I still choose fastapi with Mangum or go with Chalice framework?

@codingwithroby 8 месяцев назад

I see nothing wrong with using FastAPI with Mangum

@KTMedia-hx5gg 10 месяцев назад

the second command doesn't work in my end. It is giving 1. Missing closing ) in expression and 2. Unexpected token ) in expression or statement

@codingwithroby 10 месяцев назад

Hmm, I just retried it and it is working correctly. Are you sure there is no typos?

@KTMedia-hx5gg 10 месяцев назад

@@codingwithroby Yeah, I noticed it afterwards that I was using powerhell while you were in zsh. I had to use an alternative to that command for powershell

@codingwithroby 10 месяцев назад

Do you mind sharing what the alternative command was?

@willhg 3 месяца назад

@@codingwithroby this is the command for VSCode powershell terminal : "Compress-Archive -Path . -destinationpath ../aws_lambda_artifact.zip"

@amarnathreddysurapureddy9111 7 месяцев назад

if i import some files from another file is it zip every thing

@codingwithroby 7 месяцев назад

Yes, you would want to zip everything

@amarnathreddysurapureddy9111 7 месяцев назад

@@codingwithroby file2.py imported into main.py then is it zip all files?

@eugeniosp3 11 месяцев назад

Easy easy sub. Nice job roby

@codingwithroby 11 месяцев назад

Woot woot, thanks for the kind words 🙂

@eugeniosp3 11 месяцев назад

@@codingwithroby do you have any info on how to access this from a client side call? Say I want to make a get request with a json payload how would i access this? Is it the function URL? Also what type of auth would it be?

@jorgesisco981 6 месяцев назад

Great video!, quick question: will I be able to use all the endpoints without setting them up in the api gateway?

@johnhorton3727 5 месяцев назад

You can proxy all routes/methods to the lambda using {proxy+}

@JarvisMillan 10 месяцев назад

how about larger files? i think you cant upload larger packaged .zip files.

@codingwithroby 10 месяцев назад

For larger files you will probably not want to do a lambda, but instead use EC2 which I will eventually make a video on

@tamaspleszkan6100 9 месяцев назад

Use lambda layers for dependencies. That way you also get the option to edit the code in the editor on the lambda page. If your lambda gets to the point where without dependencies it exceeds the lambda limit, you are packing too much stuff into it.

@moverecursus1337 2 месяца назад

Mount a EFS on a EC2, pip install --target with target to the EFS, delete ec2 instance, create a lambda with a mounting to the EFS and make PYTHONPATH as the local on efs you installed your dependencies. I am doing this for a segmentation model inference application

@ptk6909 9 месяцев назад

This deployment on aws in this video free or not ? and also can open /docs or swagger ?

@codingwithroby 9 месяцев назад

Yes (part of free tier) and yes 🙂

@ptk6909 9 месяцев назад

@@codingwithroby I follow your video until deploy successful and open /docs swagger also successful. api can use complete But except api method post api must have parameter/data{} before excute after I input and press excute result error 504 ( This swagger from my code on local have no any problems )

@sachinsharma4539 7 месяцев назад

i followed your video and deploy code zip to lambda when i test i am getting error: "errorMessage": "Unable to import module 'main': No module named 'pydantic_core'"

@KnightDark1233 6 месяцев назад

I'm having the same issue

@zth-ue5oy 5 месяцев назад

did you solve this problem? I have the same issue

@zth-ue5oy 5 месяцев назад

did you solve this problem? I have the same issue@@KnightDark1233

@instructabuild 5 месяцев назад

I found a workaround to this issue, see my post from Feb 9, 2024 in comments. Hope it helps someone else too...

@athulkrishnadiyil1735 10 месяцев назад

mangum seems like no longer maitained ....?

@codingwithroby 10 месяцев назад

It has not had a PR in awhile, but it is still widely used.

@conadeanzola День назад

Why would you deploy FastAPI on top of Lambda instead of using API Gateway and Lambda functions that run only the required logic? It's like forcing a use case in a service that is not designed for that purpose.

@thonnatigopi 27 дней назад

Kindly make a s3 uploads and trigger using lambda and fast api bro

@codingwithroby 27 дней назад

I will add it to my backlog 🙂

@thonnatigopi 27 дней назад

@@codingwithroby and also how to use custom packages like ffmpeg for audio conversation and others , to trigger lambda and use GPU , inhouse models like whisper model how to use them to trigger pls kindly make a video I'm eagerly waiting

@thonnatigopi 27 дней назад

Use everything in vscode because cloud developers can't give credentials to developers in company, so kindly make a video for python automatic project in vscode and if possible dockerize integration deploy and aws lambda and Sam

@kzzz3 9 месяцев назад

mangum seems abandoned. Last commit was made almost a year ago

@codingwithroby 9 месяцев назад

Yeah, but Mangum is still the best option for deploying FastAPI on lambdas. When a better handler comes out you can wrap app in it

@amarnathreddysurapureddy9111 7 месяцев назад

I am getting Internal Server Error After followed,

@pedroalbertorojasvalladare260 6 месяцев назад

Me too, did you fix that?

@amarnathreddysurapureddy9111 6 месяцев назад

@@pedroalbertorojasvalladare260 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UauMQGqaxGo.html. I Used CI/CD Piples of Github.

@amarnathreddysurapureddy9111 6 месяцев назад

@@pedroalbertorojasvalladare260 If you want upload more than 2.4 GB Lambda function won't work.

@pedroalbertorojasvalladare260 6 месяцев назад

@@amarnathreddysurapureddy9111 thanks, I deployed my API on render it's more easily

@c4rb0n5 6 месяцев назад

Check endpoint url and cors maybe

@pushkarkathayat7893 5 месяцев назад

The only issue is their cold start

@SajanKumar-mx2jg Месяц назад

Magnum is not maintained so I don't we should use it.

@codingwithroby Месяц назад

As of right now though it is a wrapper that doesn"t need maintained (as of now).

@CesarAugustoPerezTafur 10 месяцев назад

Hi, How are you? first thank you for the tutorial, second, i have troblue when test de app in aws, it still show Internal server Error message, although i edited Handler in console. i wrote main.handler. the only ting that i made differenet was replace this command lines 2. (cd dependencies; zip ../aws_lambda_artifact.zip -r .) 3. zip aws_lambda_artifact.zip -u main.py for Compress-Archive dependencies/*.* lambda_function2.zip and Compress-Archive main.py -update aws_lambda_artifact.zip Could you help me?

@SoulCTO 10 месяцев назад

You need to debug to see what is happening. Maybe it is some incompatibility between lib version supported by aws lambda. What you can try to do is in your requirements.txt, force the version of fast api to 0.99.0 (fastapi==0.99.0) and remove the version of pydantic and pydantic core (so it will get the correct one. When you run locally with uvicorn you will find the right version). This happened to me in another project and might fix the issue.

@codingwithroby 10 месяцев назад

For the time being, I found the best FastAPI version to be 0.99.0

@CesarAugustoPerezTafur 10 месяцев назад

Thanks all for the answer. I solve the problem changing the py lance versión, i mafe a video in spanish with the solution ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FUsJmLO2G4g.htmlsi=z-mQPlbBjFde_3g0

@CesarAugustoPerezTafur 10 месяцев назад

@@codingwithroby hi, I deployed my api with mysql in lambda but not all of them work, only the delete one and the query by user_id work. vbx54teybuuh3rvjyss67x3j740mnyft.lambda-url.us-east-2.on.aws/docs. could you help me

@honchan83 9 месяцев назад

@@SoulCTO Thank you so much for leaving this comment, I have spent days to figure out what goes wrong. AWS won't give us that much hints to fix the problem. I did not realise it is the fastapi version that making things to fail.