Integrate Icinga with Slack

slack_icinga.php

#!/usr/bin/php
<?php

$slack_botname      = "Icinga";
$slack_webhook_url  = "https://WEB-HOOK-URL";
$icinga_hostname    = "http://IP-OR-HOSTNAME-OF-YOUR-ICINGA-INSTALLATION";

$type = $argv[1];
$state = ("host" === $type) ? getenv('ICINGA_HOSTSTATE') : getenv('ICINGA_SERVICESTATE');

/**
 * Hosts can be in these states: UP, DOWN, UNREACHABLE
 * Services can be in these states: OK, WARNING, UNKNOWN, CRITICAL
 */
switch ($state) {
    case 'UP':
    case 'OK':
        $icon = ":white_check_mark:";
        break;
    case 'DOWN':
    case 'CRITICAL':
        $icon = ":exclamation:";
        break;
    case 'WARNING':
        $icon = ":warning:";
        break;
    case 'UNREACHABLE':
    case 'UNKNOWN':
        $icon = ":question:";
        break;
    default:
        $icon = ":white_medium_square:";
        break;
}

$hostname = getenv('ICINGA_HOSTNAME');

if ("host" === $type) {
    $msg  = "${icon} Host: $hostname\n";
    $msg .= "Message: " . getenv('ICINGA_HOSTOUTPUT') . "\n";

    if (!is_null(getenv('ICINGA_HOSTPERFDATA'))) {
        $msg .= "Perfdata: " . getenv('ICINGA_HOSTPERFDATA') . "\n";
    }
    $msg .= "<${icinga_hostname}/cgi-bin/icinga/extinfo.cgi?type=1&host=${hostname}|View host details>";
} else {
    $msg  = "Host: $hostname\n";
    $msg .= "${icon} Service: " . getenv('ICINGA_SERVICEDISPLAYNAME') . "\n";
    $msg .= "Message: " . getenv('ICINGA_SERVICEOUTPUT') . "\n";
    if (!is_null(getenv('ICINGA_SERVICEPERFDATA'))) {
        $msg .= "Perfdata: " . getenv('ICINGA_SERVICEPERFDATA') . "\n";
    }
    
    $msg .= "<${icinga_hostname}/cgi-bin/icinga/extinfo.cgi?type=1&host=${hostname}|View host details>";
}

$payload = array(
    "username" => $slack_botname,
    // slacks icon for Nagios, will do for now
    "icon_url" => "https://slack.global.ssl.fastly.net/20653/img/services/nagios_128.png",
    "text" => $msg,
);

$data_string = json_encode($payload);

$ch = curl_init($slack_webhook_url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string))
);

$result = curl_exec($ch);

Place the file in /usr/local/bin/slack.php, chmod it to 755 and setup Icinga:

  define contact {
        contact_name                             slack
        alias                                    Slack
        service_notification_period              24x7
        host_notification_period                 24x7
        service_notification_options             w,u,c,r
        host_notification_options                d,r
        service_notification_commands            notify-service-by-slack
        host_notification_commands               notify-host-by-slack
  }

  define command {
        command_name     notify-service-by-slack
        command_line     /usr/local/bin/slack.php service
  }

  define command {
        command_name     notify-host-by-slack
        command_line     /usr/local/bin/slack.php host
  }

You will also need to install php5 and php5-cli

apt-get install php5 php5-cli