src/Leevel/Log/Syslog.php
protected function makeSyslogHandler(): LoggerInterface
    {
        $handler = new SyslogHandler($this->option['channel'],
            $this->option['facility'],
            $this->normalizeMonologLevel($this->option['level'])
        );

        return $this->monolog->pushHandler($this->normalizeHandler($handler));
    }
protected function makeSyslogHandler(): LoggerInterface
    {
        $handler = new SyslogHandler($this->option['channel'],
            $this->option['facility'],
            $this->normalizeMonologLevel($this->option['level'])
        );

        return $this->monolog->pushHandler($this->normalizeHandler($handler));
    }
初始化系统 handler.

@return \Psr\Log\LoggerInterface