首先備份docker文件：
cp /usr/lib/systemd/system/docker.service /usr/lib/systemd/system/docker.service_back編輯docker文件：/usr/lib/systemd/system/docker.service
vim /usr/lib/systemd/system/docker.service修改ExecStart行為下面內容
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock重新加載docker配置
systemctl daemon-reload // 1，加載docker守護線程
systemctl restart docker // 2，重啟docker
遇到報錯
Error response from daemon: failed to create endpoint redis on network bridge: iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 10.211.55.9 --dport 6379 -j DNAT --to-destination 172.17.0.4:6379 ! -i docker0: iptables: No chain/target/match by that name.
pkill docker iptables -t nat -F ifconfig docker0 down brctl delbr docker0 docker -d systemctl restart docker 重啟docker服務 提示找不到brctl命令運行一下命令 brctl找不到 yum install -y bridge-utils netstat找不到 yum install net-tools pstree yum install psmisc nslookup yum -y install bind-utils