jenkinsdocker守护进程运行?

我正在运行创build一个pipe道,我从错误日志中获取下面

+ docker pull maven:3.3.3 Cannot connect to the Docker daemon. Is the docker daemon running on this host? Hint: Some lines were ellipsized, use -l to show in full. [root@centos ~]# systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled) Active: active (running) since Thu 2017-09-07 14:43:36 EDT; 18min ago 

我不知道我错过了什么。