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<?php
// Icinga DB Web | (c) 2021 Icinga GmbH | GPLv2
namespace Icinga\Module\Icingadb\ProvidedHook;
use Exception;
use Icinga\Application\Hook\HealthHook;
use Icinga\Module\Icingadb\Common\Database;
use Icinga\Module\Icingadb\Common\IcingaRedis;
use Icinga\Module\Icingadb\Model\Instance;
class RedisHealth extends HealthHook
{
use Database;
public function getName(): string
{
return 'Redis';
}
public function checkHealth()
{
try {
$lastIcingaHeartbeat = IcingaRedis::getLastIcingaHeartbeat();
if ($lastIcingaHeartbeat === null) {
$lastIcingaHeartbeat = time();
}
$instance = Instance::on($this->getDb())->columns('heartbeat')->first();
if ($instance === null) {
$this->setState(self::STATE_UNKNOWN);
$this->setMessage(t(
'Can\'t check Redis: Icinga DB is not running or not writing into the database'
. ' (make sure the icinga feature "icingadb" is enabled)'
));
return;
}
$outdatedDbHeartbeat = $instance->heartbeat->getTimestamp() < time() - 60;
if (! $outdatedDbHeartbeat || $instance->heartbeat->getTimestamp() <= $lastIcingaHeartbeat) {
$this->setState(self::STATE_OK);
$this->setMessage(t('Redis available and up to date.'));
} elseif ($instance->heartbeat->getTimestamp() > $lastIcingaHeartbeat) {
$this->setState(self::STATE_CRITICAL);
$this->setMessage(t('Redis outdated. Make sure Icinga 2 is running and connected to Redis.'));
}
} catch (Exception $e) {
$this->setState(self::STATE_CRITICAL);
$this->setMessage(sprintf(t("Can't connect to Redis: %s"), $e->getMessage()));
}
}
}
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