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