app\components\Command::runRemoteCommand PHP Method

    public final function runRemoteCommand($command, $delay = 0)
    {
        $this->log = '';
        $needTTY = '-T';
        foreach (GlobalHelper::str2arr($this->getConfig()->hosts) as $remoteHost) {
            $localCommand = sprintf('ssh %s -p %d -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o CheckHostIP=false %s@%s %s', $needTTY, $this->getHostPort($remoteHost), escapeshellarg($this->getConfig()->release_user), escapeshellarg($this->getHostName($remoteHost)), escapeshellarg($command));
            if ($delay > 0) {
                // 每台机器延迟执行post_release任务间隔, 不推荐使用, 仅当业务无法平滑重启时使用
                static::log(sprintf('Sleep: %d s', $delay));
                sleep($delay);
            }
            static::log('Run remote command ' . $command);
            $log = $this->log;
            $this->status = $this->runLocalCommand($localCommand);
            $this->log = $log . (($log ? PHP_EOL : '') . $remoteHost . ' : ' . $this->log);
            if (!$this->status) {
                return false;
            }
        }
        return true;
    }