问题
在Jenkins中执行docker build报错：Cannot connect to the Docker daemon. Is the docker daemon running on this host?
脚本：
#!/bin/sh
id
echo "start build..."
echo `docker ps`
错误日志：
Started by remote host 117.28.231.17
Building in workspace /var/lib/jenkins/workspace/test_dockerbuild02
[test_dockerbuild02] $ /bin/sh /tmp/jenkins7776024465780877752.sh
uid=994(jenkins) gid=991(jenkins) groups=991(jenkins)
start build...
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
Finished: SUCCESS
解决方案
修复：
原因是jenkins用户没有加入docker的用户组
vim /etc/sudoers
------------
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
jenkins ALL=(ALL) ALL
usermod -G docker jenkins
(cat vim /etc/group 看docker是哪个用户组，或者直接加入root用户组)
service jenkins restart
(记得重启服务)