Docker网络详解

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# 先关闭docker
$ sudo service docker stop

# 关闭网桥docker0# 添加自己的网桥bridge0
$ sudo ifconfig docker0 down
$ sudo brctl addbr bridge0
$ sudo ifconfig bridge0 192.168.227.1 netmask 255.255.255.0

# 向Docker startup file中添加启动自定义网桥参数
$ echo "DOCKER_OPTS=\"-b=bridge0\"" >> /etc/default/docker

# 启动Docker
$ sudo service docker start

# 查看自定义网桥是否启动成功，ip等配置是否正确
$ sudo ifconfig bridge0
bridge0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:192.168.227.1 Bcast:192.168.227.255 Mask:255.255.255.0

# 启动container
docker run -i -t base /bin/bash

# 可以看到Container IP 在网段192.168.227/24内
root@261c272cd7d5:/# ifconfig eth0
eth0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet addr:192.168.227.5 Bcast:192.168.227.255 Mask:255.255.255.0

# bridge0 IP as the default gateway# 查看路由信息
root@261c272cd7d5:/# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.227.1 0.0.0.0 UG 0 0 0 eth0
192.168.227.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

# hits CTRL+P then CTRL+Q to detach

# 查看网桥信息
$ sudo brctl show
bridge name bridge id STP enabled interfaces
bridge0 8000.fe7c2e0faebd no vethAQI2QT

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