Running your Symfony project on AWS Lambda

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Running your Symfony project on AWS Lambda

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(coupling yourself to AWS for fun & proﬁt)

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fun

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proﬁt

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EC2

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EC2 Data Store

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EC2 Data Store HTTPS

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EC2 Data Store Load Balancer HTTPS

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EC2 Data Store Load Balancer EC2 EC2

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EC2 Data Store Load Balancer EC2 EC2 $$$ $$ $$$ $$$ $$$

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EC2 Data Store Load Balancer EC2 EC2

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Lambda is a piece of code that only costs you money while it’s being executed

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Lambda & PHP from scratch is a PITA

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Lambda function

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Lambda function JS Handler

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Lambda function JS Handler PHP Binary

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Lambda function JS Handler PHP Binary

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Lambda function JS Handler PHP Binary

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Lambda function JS Handler PHP Binary

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mnapoli/bref

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• Well documented • Serverless framework plugin (easy to get running) • Built on top of FIG standards (PSR-7) mnapoli/bref

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Lambda function JS Handler PHP Binary

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Lambda function JS Handler PHP Binary PSR-7 bref.php

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Lambda function JS Handler PHP Binary PSR-7

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Lambda function JS Handler PHP Binary PSR-7 API Gateway

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Lambda function JS Handler PHP Binary API Gateway HTTPS FREE SSL!!! PSR-7

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Things to remember

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• Application logs are sent to Cloudwatch • PHP is running through the CLI SAPI

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What we’ll cover

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• Setting up a new ‘Hello World’ SF 4 site • Setting up a REST API with database migrations • Converting an existing site to Lambda • Retro-ﬁtting to an older Symfony site • Cron tasks • Performance

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Hello World

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• Install Symfony • Install Bref • Set up some conﬁg • Deploy • Explore the environment • Fix any issues

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use the Symfony adapter

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includes Lambda env vars package name

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create .bref.yml with build hooks

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click me

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oh noes

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let’s refresh…

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oh noes again!

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let’s refresh again…

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• Installed Symfony • Installed Bref • Copied conﬁg from the docs • Deployed • Had a look around • Used Cloudwatch to help us debug

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That’s great, but how about doing something useful?

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• Install Api-Platform • Install Bref • Add a database connection • Run Symfony commands • Get rid of the ugly Cloudfront hostname

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• Change logs directory in Kernel class • Conﬁgure includes in serverless.yml • Replace contents of bref.php with Symfony adapter • Add cache warmup to .bref.yml

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add /dev preﬁx to routing

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Setting up the database connection

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Lambda function JS Handler PHP Binary PSR-7 API Gateway

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Lambda function JS Handler PHP Binary PSR-7 API Gateway

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store VPC

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${env:DATABASE_URL}

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Running Symfony commands with bref

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invoke Lambda function

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Symfony command

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entry point works!

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get empty collection

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post a new book

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yay!!!

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That’s great, but I have a really cool domain name…

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we can remove /dev route preﬁx :)

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w00t!

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• Installed Symfony • Installed Api-Platform • Installed Bref • Conﬁgured the standard ﬁles • Added a database connection through environment vars • Ran Symfony commands • Added a custom domain name via the AWS GUI

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That’s great, but my site is more than just a REST API…

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vich/uploader-bundle

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• Install Bref to an existing site • Move assets to a CDN • Move session storage to a centralised location • Add image uploading

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• Change logs directory in Kernel class • Conﬁgure includes in serverless.yml • Replace contents of bref.php with Symfony adapter • Add cache warmup to .bref.yml

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webpack.conﬁg.js

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process.env.ASSETS_BUCKET_NAME

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${env:ASSETS_BUCKET_NAME}

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Symlinking bug :(

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%env(ASSETS_BUCKET_NAME)%

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refresh… :)

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got kicked, lol

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store Sessions

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store JS Handler PHP Binary PSR-7 Sessions Sessions

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store JS Handler PHP Binary PSR-7 Sessions

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migrations worked!

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where are my images?

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store File Store

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original value

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point to CDN instead

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create a global twig variable

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pretty kitties!

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Uploading new images

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Use pre-signed URLs

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Client Server Amazon S3

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Client Server Amazon S3 Get Pre-Signed URL

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL One-time use URL

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL One-time use URL One-time use URL

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL One-time use URL One-time use URL PUT ﬁle to One-time use URL 200 OK

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL One-time use URL One-time use URL PUT ﬁle to One-time use URL 200 OK Update record

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Client Server Amazon S3 Get Pre-Signed URL Get Pre-Signed URL One-time use URL One-time use URL PUT ﬁle to One-time use URL 200 OK Update record Delete previous ﬁle

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we can delete all of this

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and this

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we only want /uploads to be writeable

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let’s re-create this in yaml

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• Added Bref to an existing site • Fixed assets by moving them to a CDN • Added serverless-s3-uploads plugin • Conﬁgured CORS & bucket security in serverless.yml • Moved session storage to the database • Used pre-signed URLs for image uploading

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That’s really cool, but I need to run cron tasks in PHP

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{ “cli”: “app:dump-lambda — message=Hello” }

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But my site isn’t Symfony 4!

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Performance

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source: https://github.com/mnapoli/bref-benchmark JS vs PHP

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Lambda function JS Handler PHP Binary PSR-7 API Gateway Data Store VPC

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source: https://medium.freecodecamp.org/lambda-vpc-cold-starts-a-latency-killer-5408323278dd

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source: https://medium.freecodecamp.org/lambda-vpc-cold-starts-a-latency-killer-5408323278dd

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source: https://medium.freecodecamp.org/lambda-vpc-cold-starts-a-latency-killer-5408323278dd keep VPCs warm

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Recap

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• Setting up a new ‘Hello World’ SF 4 site • Setting up an Api-Platform site with database migrations • Converting an existing site to Lambda • Retro-ﬁtting to an older Symfony site • Cron tasks • Performance