docker端口映射或启动容器时报错

报错：

docker start djapp

Error response from daemon: driver failed programming external connectivity on endpoint djapp (8b264f0aa723d680ae946cdfc740dd1941cd332a9d76acc505dcbb7373605d72):  (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 8080 -j DNAT --to-destination 172.17.0.2:8080 ! -i docker0: iptables: No chain/target/match by that name.

 (exit status 1))

Error: failed to start containers: djapp

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
重启docker服务及可重新生成自定义链DOCKER
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT)
target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination        
MASQUERADE  all  --  172.17.0.0/16        0.0.0.0/0          
MASQUERADE  tcp  --  172.17.0.2           172.17.0.2           tcp dpt:8080

Chain DOCKER (2 references)
target     prot opt source               destination        
RETURN     all  --  0.0.0.0/0            0.0.0.0/0          
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8888 to:172.17.0.2:8080
root@router:playbook#iptables -t nat -nL
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT)
target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination        
DOCKER     all  --  0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination        
MASQUERADE  all  --  172.17.0.0/16        0.0.0.0/0          
MASQUERADE  tcp  --  172.17.0.2           172.17.0.2           tcp dpt:8080

Chain DOCKER (2 references)
target     prot opt source               destination        
RETURN     all  --  0.0.0.0/0            0.0.0.0/0          
DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0            tcp dpt:8888 to:172.17.0.2:8080

解决:

重启docker服务后再启动容器
systemctl restart docker
docker start djapp