问题背景
执行 docker start tomcat 报以下的错误
Error response from daemon: driver failed programming external connectivity on endpoint tomcat9999 (f24431f0da474edbe79ba136b19079df3dcae89a4f688abe74cd0b993856a670): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 8080 -j DNAT -
解决办法
docker服务启动时定义的自定义链DOCKER被清除，重启即可
systemctl restart docker