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  • 使用iptables为docker容器动态添加端口映射

    1、将当前iptables的配置写入保存到/etc/sysconfig/iptables

    2、保存

    /etc/init.d/iptables sava

    3、修改iptables配置(vi /etc/sysconfig/iptables):

    在适当位置增加下面红色的三行,然后重启iptables即可。(30612 是容器对外提供服务的端口)

    -A FORWARD -i docker0 -o docker0 -j ACCEPT
    -A DOCKER -d 172.17.0.10/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 9000 -j ACCEPT
    -A DOCKER -d 172.17.0.117/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 8080 -j ACCEPT
    -A DOCKER -d 172.17.0.7/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 32095 -j ACCEPT
    -A DOCKER -d 172.17.0.7/32 ! -i docker0 -o docker0 -p tcp -m tcp --dport 30612 -j ACCEPT
    COMMIT
    # Completed on Thu Mar  3 13:34:42 2016
    # Generated by iptables-save v1.4.7 on Thu Mar  3 13:34:42 2016
    *nat
    :PREROUTING ACCEPT [267:19881]
    :POSTROUTING ACCEPT [8:480]
    :OUTPUT ACCEPT [8:480]
    :DOCKER - [0:0]
    -A PREROUTING -p tcp -m tcp --dport 32095 -j DNAT --to-destination 172.17.0.7:32095
    -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
    -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
    -A POSTROUTING -s 172.17.0.10/32 -d 172.17.0.10/32 -p tcp -m tcp --dport 9000 -j MASQUERADE
    -A POSTROUTING -s 172.17.0.117/32 -d 172.17.0.117/32 -p tcp -m tcp --dport 8080 -j MASQUERADE
    -A POSTROUTING -s 172.17.0.7/32 -d 172.17.0.7/32 -p tcp -m tcp --dport 32095 -j MASQUERADE
    -A POSTROUTING -s 172.17.0.7/32 -d 172.17.0.7/32 -p tcp -m tcp --dport 30612 -j MASQUERADE
    -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
    -A DOCKER ! -i docker0 -p tcp -m tcp --dport 9000 -j DNAT --to-destination 172.17.0.10:9000
    -A DOCKER ! -i docker0 -p tcp -m tcp --dport 54321 -j DNAT --to-destination 172.17.0.117:8080
    -A DOCKER ! -i docker0 -p tcp -m tcp --dport 32095 -j DNAT --to-destination 172.17.0.7:32095
    -A DOCKER ! -i docker0 -p tcp -m tcp --dport 30612 -j DNAT --to-destination 172.17.0.7:30612
    COMMIT
    # Completed on Thu Mar  3 13:34:42 2016

    最后:

    重启iptables服务

    # centos6.x
    service iptables restart
    
    # centos7.x
    systemctl restart iptables.service
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  • 原文地址:https://www.cnblogs.com/liugp/p/11399178.html
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