Simple PHP healthcheck for elasticsearch (add to crontab)

elasticsearch-healthcheck.php

<?php

        $ch = curl_init();
        
        curl_setopt($ch, CURLOPT_URL, "127.0.0.1");
        
        curl_setopt($ch, CURLOPT_PORT, "9200");
        
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        
        curl_exec($ch);

        if(curl_getinfo($ch, CURLINFO_HTTP_CODE) !== 200){

                mail(
                        "[email protected]", 
                        "Elasticsearch is down (".gethostname().")", 
                        "Please restart the service as soon as possible!"
                );

                echo 'failed'.PHP_EOL;

        } else {

                echo 'passed'.PHP_EOL;

        }

        curl_close($ch);