config firewall rule is success!
[root@docker-test3 code]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 20 packets, 1914 bytes)
pkts bytes target prot opt in out source destination
1 60 DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 1 packets, 60 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * * 172.16.0.0/16 !172.16.0.0/16
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40030 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0 117.121.x.99 tcp dpt:40033 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 2.2.2.0/24 0.0.0.0/0 tcp dpt:40037 to:172.16.1.2:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:40034 to:172.16.1.4:22
0 0 DNAT tcp -- !ovs2 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:40035 to:172.16.1.4:22
0 0 DNAT tcp -- !ovs2 * 1.1.1.0/24 0.0.0.0/0 tcp dpt:40036 to:172.16.1.4:22
[root@docker-test3 code]# tail -n 15 /etc/sysconfig/iptables
:POSTROUTING ACCEPT [1739:127286]:OUTPUT ACCEPT [1739:127286]:DOCKER - [0:0]-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
-A POSTROUTING -s 172.16.0.0/16 ! -d 172.16.0.0/16 -j MASQUERADE
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
#follow is container:test1 firewall rule
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40030 -j DNAT --to-destination 172.16.1.2:22
-A DOCKER -s 0.0.0.0 -d 117.121.x.99 ! -i ovs2 -p tcp -m tcp --dport 40033 -j DNAT --to-destination 172.16.1.2:22
-A DOCKER -s 2.2.2.2/24 ! -i ovs2 -p tcp -m tcp --dport 40037 -j DNAT --to-destination 172.16.1.2:22
#follow is container:test2 firewall rule
-A DOCKER -s 0.0.0.0/0.0.0.0 ! -i ovs2 -p tcp -m tcp --dport 40034 -j DNAT --to-destination 172.16.1.4:22
-A DOCKER -s 0.0.0.0/0.0.0.0 ! -i ovs2 -p tcp -m tcp --dport 40035 -j DNAT --to-destination 172.16.1.4:22
-A DOCKER -s 1.1.1.1/24 ! -i ovs2 -p tcp -m tcp --dport 40036 -j DNAT --to-destination 172.16.1.4:22
COMMIT
很简单吧，比以前需要找到容器的ip，然后收到去防火墙里修改，并且修改的时候，还得计算给予的来源端口，现在是否舒服很多，以后有平台想使用的话，直接调用就可以。
8、删除额外的外网ip
使用rp参数
[root@docker-test3 code]# python modify_docker_container_firewall.py test2 -rp 117.121.x.99
this is external ip:117.121.x.99 is has used by container:test1.if you want to delete it,please input correct container:test1 and external ip:117.121.x.99.
[root@docker-test3 code]# python modify_docker_container_firewall.py test1 -rp 117.121.x.99
