Docker使用常见问题和解决方法

1. docker 启动image错误

docker: Error response from daemon: driver failed programming external connectivity on endpoint jolly_shockley (957a1271cd0ae4f9f28163b7cdf5c17d6110fcd6ccd2ca79f2cf0ab8c67dfd52): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 3306 -j DNAT --to-destination 172.17.0.2:3306 ! -i docker0: iptables: No chain/target/match by that name.
(exit status 1)).

原因： docker服务启动时定义的自定义链DOCKER由于某种原因被清掉

解决方法：

重启docker服务及可重新生成自定义链DOCKER

systemctl restart docker

2、当输入docker images出现如下错误

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

解决方法：

$ systemctl daemon-reload
$ sudo service docker restart
$ sudo service docker status