Creating custom checks

This package offers a few common checks right out of the box. If you want to monitor another aspect of your app, you can create your own custom check.

A check is any class that extends from Spatie\Health\Checks\Check. It contains one abstract method that you should implement: run.

namespace App\Checks;

use Spatie\Health\Checks\Check;
use Spatie\Health\Checks\Result;

class YourCustomCheck extends Check
{
    public function run(): Result
    {
        // your custom logic...
    }
}

##Creating results

The run method should always return a Spatie\Health\Checks\Result. Using this object you can instruct the package to report a failure, to send a notification, and add meta information.

##Setting a status and sending notifications

The Result object has a status to signify a check is ok, produces a warning, or has failed.

You can use these methods to set the status of a result:

$result = Spatie\Health\Checks\Result::make();

$result->ok(); // the check ran ok
$result->warning(); // the check ran ok, but with a warning
$result->failed(); // the check failed

You should call ok() when everything your check verifies is ok. You should call fail() if you detected that there was something wrong. The warning() should be used when the check did pass, but might fail soon.

When you pass a string to any of these methods and return that result, then the package will send a notification.

Here's an example check that will check for used disk space. When used disk space is above 70%, a warning notification with a warning will be sent, when above 90% an error notification will be sent.

namespace App\Checks;

use Spatie\Health\Checks\Check;
use Spatie\Health\Checks\Result;

class UsedDiskSpaceCheck extends Check
{
    public function run(): Result
    {
        $usedDiskSpacePercentage = $this->getDiskUsagePercentage();

        $result = Result::make();

        if ($usedDiskSpacePercentage > 90) {
            return $result->failed("The disk is almost full ({$usedDiskSpacePercentage} % used)");
        }

        if ($usedDiskSpacePercentage > 70) {
            return $result->warning("The disk getting full ({$usedDiskSpacePercentage}% used)");
        }

        return $result->ok();
    }

    protected function getDiskUsagePercentage(): int
    {
        // determine used disk space, omitted for brevity
    }
}

##Adding a short summary

Optionally, you can add a short summary of what the check found, using the shortSummary method.

namespace App\Checks;

use Spatie\Health\Checks\Check;
use Spatie\Health\Checks\Result;

public function run(): Result
{
    $usedDiskSpacePercentage = $this->getDiskUsagePercentage();

    $result = Result::make();
    
    $result->shortSummary("{$usedDiskSpacePercentage}%")

    // ...
}

This short summary will be written in a result store. The summary can be used when displaying all the results on a dashboard.

##Adding meta information

You can add meta information to a result. This meta information will be written in a result store. By adding meta information, external services like Oh Dear can display it in their notification, or you can keep a history of this meta information in your own database.

Meta information can be added to a check result, by calling meta and passing it with an array of meta data.

namespace App\Checks;

use Spatie\Health\Checks\Check;
use Spatie\Health\Checks\Result;

class UsedDiskSpaceCheck extends Check
{
    public function run(): Result
    {
        $usedDiskSpacePercentage = $this->getDiskUsagePercentage();

        $result = Result::make();
        
        $result->meta(['used_disk_space' => $usedDiskSpacePercentage]);
        
        // rest of the check omitted for brevity
        
        return $result;
    }
}