Docker网络详解

# 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