Docker容器的网络基础-自定义虚拟网桥

 

Docker容器的网络基础-自定义虚拟网桥

root@ubuntu:~# ifconfig

br0       Linkencap:Ethernet  HWaddr00:00:00:00:00:00 

         inet addr:192.168.100.1 Bcast:0.0.0.0  Mask:255.255.255.0

         inet6 addr: fe80::f402:8aff:fe15:e26c/64 Scope:Link

          UPBROADCAST MULTICAST  MTU:1500  Metric:1

          RXpackets:25 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:54 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:1596 (1.5 KB)  TX bytes:8191 (8.1KB)

 

bridge0   Link encap:Ethernet  HWaddr 00:00:00:00:00:00 

         inet addr:192.168.5.1 Bcast:0.0.0.0  Mask:255.255.255.0

         inet6 addr: fe80::ac52:20ff:fe82:f107/64 Scope:Link

          UPBROADCAST MULTICAST  MTU:1500  Metric:1

          RXpackets:6891 errors:0 dropped:0 overruns:0 frame:0

          TX packets:9322 errors:0 dropped:0overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:280863 (280.8 KB)  TXbytes:24628712 (24.6 MB)

 

eth0     Link encap:Ethernet  HWaddr00:0c:29:d7:5c:be 

         inet addr:192.168.2.9 Bcast:192.168.2.255 Mask:255.255.255.0

         inet6 addr: fe80::20c:29ff:fed7:5cbe/64 Scope:Link

          UPBROADCAST RUNNING MULTICAST MTU:1500  Metric:1

          RXpackets:1645453 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:400249 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

          RXbytes:388740529 (388.7 MB)  TXbytes:27437145 (27.4 MB)

 

lo       Link encap:Local Loopback 

         inet addr:127.0.0.1 Mask:255.0.0.0

         inet6 addr: ::1/128 Scope:Host

          UPLOOPBACK RUNNING  MTU:65536  Metric:1

          RXpackets:157 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:157 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:27669 (27.6 KB)  TX bytes:27669(27.6 KB)

 

 

查看目前的网桥，并删除

root@ubuntu:~# apt-get install bridge-utils

root@ubuntu:~# brctl show

bridge name    bridgeid           STP enabled    interfaces

br0            8000.000000000000       no            

bridge0             8000.000000000000       no

 

停止docker服务

root@ubuntu:~#service docker stop

 

 

删除没用的网卡

用ip命令使br0网卡down掉

root@ubuntu:~# ip link set dev br0 down

删除网卡

root@ubuntu:~# brctl delbr br0

 

用ip命令使bridge0网卡down掉

root@ubuntu:~# ip link set dev bridge0 down

删除网卡

root@ubuntu:~# brctl delbr bridge0

root@ubuntu:~# brctl show

bridge name    bridgeid           STP enabled    interfaces

root@ubuntu:~#ifconfig

eth0     Link encap:Ethernet  HWaddr00:0c:29:d7:5c:be 

         inet addr:192.168.2.9 Bcast:192.168.2.255 Mask:255.255.255.0

         inet6 addr: fe80::20c:29ff:fed7:5cbe/64 Scope:Link

          UPBROADCAST RUNNING MULTICAST MTU:1500  Metric:1

          RXpackets:1653100 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:407465 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

          RX bytes:389207878(389.2 MB)  TX bytes:27888027 (27.8 MB)

 

lo       Link encap:Local Loopback 

         inet addr:127.0.0.1 Mask:255.0.0.0

         inet6 addr: ::1/128 Scope:Host

          UPLOOPBACK RUNNING  MTU:65536  Metric:1

          RXpackets:157 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:157 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:27669 (27.6 KB)  TX bytes:27669(27.6 KB)

 

root@ubuntu:~#

 

 

 

 

 

 

创建一个网卡 名字是br100

root@ubuntu:~#brctl addbr br100

 

 

ip地址和子网

root@ubuntu:~#ip addr add 192.168.100.1/24 dev br100

 

 

启动桥接网卡

root@ubuntu:~#ip link set dev br100 up

 

 

写入配置

root@ubuntu:~#echo 'DOCKER_OPTS="-b=b100"' >> /etc/default/docker

root@ubuntu:~# cat /etc/default/docker

......

DOCKER_OPTS="-b=br100"

......

root@ubuntu:~#

root@ubuntu:~#service docker start

 

 

启动一个容器

root@ubuntu:~#docker run -i -t ubuntu /bin/bash

root@0afa34db9649:/# apt-get update

root@0afa34db9649:/# apt-get install net-tools -y

root@0afa34db9649:/# ifconfig

eth0     Link encap:Ethernet  HWaddr02:42:c0:a8:64:02 

         inet addr:192.168.100.2 Bcast:0.0.0.0  Mask:255.255.255.0

         inet6 addr: fe80::42:c0ff:fea8:6402/64 Scope:Link

          UPBROADCAST RUNNING  MTU:1500  Metric:1

          RXpackets:6336 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:4565 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:24637916 (24.6 MB)  TX bytes:254269(254.2 KB)

 

lo       Link encap:Local Loopback 

         inet addr:127.0.0.1 Mask:255.0.0.0

         inet6 addr: ::1/128 Scope:Host

          UPLOOPBACK RUNNING  MTU:65536  Metric:1

          RXpackets:0 errors:0 dropped:0 overruns:0 frame:0

          TXpackets:0 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:0

          RXbytes:0 (0.0 B)  TX bytes:0 (0.0 B)

 

root@0afa34db9649:/#