# 1.修改docker.service 文件
vi /usr/lib/systemd/system/docker.service
# 2.修改
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
# 3.加载守护进程
systemctl daemon-reload
# 4.重启
systemctl restart docker
# 5.开启端口
firewall-cmd --zone=public --add-port=2375/tcp --permanent
# 6.立即生效
firewall-cmd --reload
