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Informations about the package laravel-elasticbeanstalk-cron

Laravel 5 - 9.x Task Scheduler with Elastic Beanstalk

Ensure one instance in an Elastic Beanstalk environment is running Laravel's Scheduler

A common problem many people have encountered with Amazon's Elastic Beanstalk is maintaining a single instance in an environment that runs Laravel's Task Scheduler. Difficulties arise because auto-scaling does not guarantee any instance is run indefinitely and there are no "master-slave" relationships within an environment to differentiate one instance from the rest.

Although Amazon has provided a solution it involves setting up a worker tier and then, potentially, creating new routes/methods for implementing the tasks that need to be run. Yuck!

This package provides a simple, zero-setup solution for maintaining one instance within an Elastic Beanstalk environment that runs the Task Scheduler.

Amazon Linux 1 deprecation

Amazon Linux 1 (AL1) is going to be unsupported soon, it is advised to migrate to use Amazon Linux 2 (AL2) https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.migration-al.html Starts from this release will only support AL2, please use previous releases for use in AL1

How Does It Work?

Glad you asked! The below process is completely automated and only requires that you publish the .platform folder to the root of your application.

1. Use Elastic Beanstalk's Advanced Configuration to run CRON setup commands

EB applications since AL2 can contain platform hooks that provides advanced configuration for an EB environment, called .platform.

This package provides a configuration file that runs two commands on deployment (every instance initialization) that setup the conditions needed to run the Task Scheduler on one instance:

2. Run system:start:leaderselection

This is the first command that is run on deployment. It configures the instance's Cron to run Leader Selection at a configured interval (default = 5 minutes)

3. Run Leader Selection aws:configure:leader

This is the Leader Selection command. It does the following:

If this instance is the earliest launched then it is deemed the Leader and runs system:start:cron

4. Run system:start:cron

This command is run only if the current instance running Leader Selection is the Leader. It inserts another entry in the instance's Cron to run Laravel's Scheduler.

That's it!

Now only one instance, the earliest launched, will have the scheduler inserted into its Cron. If that instance is terminated by auto-scaling a new Leader will be chosen within 5 minutes (or the configured interval) from the remaining running instances.

Installation

Require this package, for Amazon Linux 2,

or for Amazon Linux 1,

After adding the package, add the ServiceProvider to the providers array in config/app.php (for Laravel 5.4 or lower)

Then, publish the .platform folder and configuration file

Don't forget to add +x permission to the EB Platform Hooks scripts

Configuration

In order for Leader Selection to run a few environmental variables must be present:

These can be included in your .env or, for EB, in the environment's configuration section.

Contributing

Make a PR for some extra functionality and I will happily accept it :)

License

This package is licensed under the MIT license.

All versions of laravel-elasticbeanstalk-cron with dependencies

PHP Build Version
Package Version
Requires illuminate/support Version 5 - 9
illuminate/console Version 5 - 9
aws/aws-sdk-php Version ^3.26
lstrojny/functional-php Version ^1.17
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