Deploy an application with AWS Lambda using Bref.
We support all kinds of applications. See the following sections for details.
- Installation and usage
- Symfony application
- Laravel application
- PSR-15 application
- Console application
- PSR-11 container application
If you are new to the Symfony Runtime component, read more in the main readme.
composer require runtime/bref
To get started, we need a serverless.yml file in our projects root. We also
use the ./vendor/runtime/bref-layer plugin. Now we can tell AWS that we want
to use a "layer" called ${runtime-bref:php-80} to run our application on.
Next we need to define the environment variable APP_RUNTIME so the Runtime component
knows what runtime to use.
# serverless.yml
service: my-app-name
plugins:
- ./vendor/runtime/bref-layer # <----- Add the extra Serverless plugin
provider:
name: aws
region: eu-central-1
runtime: provided.al2
memorySize: 1792
environment:
APP_ENV: prod
APP_RUNTIME: Runtime\Bref\Runtime
BREF_LOOP_MAX: 100 # Optional
functions:
website:
handler: public/index.php
layers:
- ${runtime-bref:php-80}
events:
# Specify that we want HTTP requests
- httpApi: '*'That is really it!
We use this file for all kinds of applications. The only thing we change in the
events. Imagine that we want to listen to changes to S3 or new SQS messages.
Or we could let this function to be invoked by another application in our system
using a Bref\Event\Handler.
You need some extra features from Bref. Install it with
composer req bref/bref
Use the standard Symfony 5.3+ public/index.php.
// public/index.php
use App\Kernel;
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function (array $context) {
return new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
};There is nothing special you need to do.
Here is an example application. With this runtime you may use the exact same application for in local development and in production.
You need some extra features from Bref. Install it with
composer req bref/bref
To run a Laravel application, you need to update your front controller to look similar to this:
// public/index.php
use Illuminate\Contracts\Http\Kernel;
define('LARAVEL_START', microtime(true));
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function (): Kernel {
static $app;
if (null === $app) {
$app = require dirname(__DIR__).'/bootstrap/app.php';
}
return $app->make(Kernel::class);
};Now you are up and running on AWS Lambda!
See runtime/laravel on how to run
this locally.
You need some extra features from Bref. Install it with
composer req bref/bref
Bref is using nyholm/psr7 to provide a PSR-7
and PSR-15 experience. See runtime/psr-nyholm
how to run your application locally.
The following code is an example PSR-15 application with the Runtime component. If it works locally it will also with on AWS Lambda.
// public/index.php
use Nyholm\Psr7\Response;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function () {
return new class implements RequestHandlerInterface {
public function handle(ServerRequestInterface $request): ResponseInterface
{
$name = $request->getQueryParams()['name'] ?? 'world';
return new Response(200, [], "Hello $name");
}
};
};Use the standard Symfony 5.3+ bin/console.
// bin/console
use App\Kernel;
use Symfony\Bundle\FrameworkBundle\Console\Application;
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function (array $context) {
$kernel = new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
return new Application($kernel);
};# serverless.yml
# ...
functions:
console:
handler: bin/console
timeout: 120
layers:
- ${runtime-bref:php-80}
events:
- schedule:
rate: rate(30 minutes)
input: '"app:invoice:send"'The PSR-11 container is great. It really shines in internal microservices where
you dont have to deal with HTTP or security. Your application just call your microservice
using an AWS Lambda api client (ie aws/aws-sdk-php or async-aws/lambda).
It is also great for reacting to S3 or SQS events.
The first thing we need is a file that returns a PSR-11 container. See below for an example for Symfony.
// bin/container.php
use App\Kernel;
require_once dirname(__DIR__).'/vendor/autoload_runtime.php';
return function (array $context) {
$kernel = new Kernel($context['APP_ENV'], (bool) $context['APP_DEBUG']);
$kernel->boot();
return $kernel->getContainer();
};Now we write a class/service that implements Bref\Event\Handler.
namespace App\Lambda;
use Bref\Context\Context;
use Bref\Event\Handler;
class HelloWorld implements Handler
{
public function handle($event, Context $context)
{
return 'Hello ' . $event['name'];
}
}Now we need to update serverless.yml to say "Use bin/container.php to get the container and then load service App\Lambda\HelloWorld".
# serverless.yml
# ...
functions:
hello:
handler: bin/container.php:App\Lambda\HelloWorld
layers:
- ${runtime-bref:php-80}
When this is deployed it can be invoked by
serverless invoke --function hello --data '{"name":"Tobias"}'
Using a service from the container makes the handlers very simple to unit test. However, if you are lazy, you may want to invoke them locally from CLI.
Run the following command to invoke the App\Lambda\HelloWorld service.
./vendor/bin/bref-local-handler.php ./bin/container.php:App\\Lambda\\HelloWorld
If your service expects some event data, add it as a JSON string or a path to a file containing JSON.
./vendor/bin/bref-local-handler.php ./bin/container.php:App\\Lambda\\HelloWorld '{"foo":"bar"}'
./vendor/bin/bref-local-handler.php ./bin/container.php:App\\Lambda\\HelloWorld example/input.json
The syntax handler: bin/container.php:App\Lambda\HelloWorld might be a bit weird to write,
but you may add an environment variable called FALLBACK_CONTAINER_FILE which
includes the file to where we can get the PSR-11 container. This may help the
serverless.yml file to read more natually.
# serverless.yml
provider:
name: aws
runtime: provided.al2
# ...
environment:
APP_ENV: prod
APP_RUNTIME: Runtime\Bref\Runtime
+ FALLBACK_CONTAINER_FILE: bin/container.php
BREF_LOOP_MAX: 100 # Optional
functions:
hello:
- handler: bin/container.php:App\Lambda\HelloWorld
+ handler: App\Lambda\HelloWorld
layers:
- ${runtime-bref:php-80}
To better integrate with different AWS events, one can use "typed handlers".
These are classes that implements Bref\Event\Handler and provides some helper
methods or classes.
To use them, you need to install Bref:
composer req bref/bref
We use the same PSR-11 configuration from above and write custom handler like:
namespace App\Lambda;
use Bref\Context\Context;
use Bref\Event\S3\S3Event;
use Bref\Event\S3\S3Handler;
class S3FileCreated extends S3Handler
{
public function handleS3(S3Event $event, Context $context): void
{
$bucketName = $event->getRecords()[0]->getBucket()->getName();
$fileName = $event->getRecords()[0]->getObject()->getKey();
// do something with the file
}
}# serverless.yml
# ...
functions:
s3_photos:
handler: bin/container.php:App\Lambda\S3FileCreated
layers:
- ${runtime-bref:php-80}
events:
- s3:
bucket: photos
event: s3:ObjectCreated:*Read more about different typed handlers at Bref's documentation.
Similar to the typed handlers above, if you use bref/symfony-messenger
you may also want to define a worker function.
# serverless.yml
# ...
functions:
worker:
handler: bin/container.php:Bref\Symfony\Messenger\Service\Sqs\SqsConsumer
timeout: 120
layers:
- ${runtime-bref:php-80}
events:
- sqs:
batchSize: 1 # Only 1 item at a time to simplify error handling
arn: !GetAtt workqueue.Arn
resources:
Resources:
workqueue:
Type: "AWS::SQS::Queue"
Properties:
QueueName: ${self:service}-workqueue
VisibilityTimeout: 600