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删除网桥链接并绑定到新的网桥上

cloudtop@toplion:~$ sudo brctl delif docker0 veth8d3f1ef
cloudtop@toplion:~$ brctl show
bridge name bridge id       STP enabled interfaces
docker0     8000.0242f4f0f62b   no      
userbr      8000.3464a91e37bd   no      bond0
virbr0      8000.525400ded333   yes     virbr0-nic
cloudtop@toplion:~$ sudo brctl addif userbr veth8d3f1ef
cloudtop@toplion:~$ brctl show
bridge name bridge id       STP enabled interfaces
docker0     8000.0242f4f0f62b   no      
userbr      8000.3464a91e37bd   no      bond0
                            veth8d3f1ef
virbr0      8000.525400ded333   yes     virbr0-nic
cloudtop@toplion:~$ ifconfig | grep docker0
docker0   Link encap:Ethernet  HWaddr 02:42:f4:f0:f6:2b  
cloudtop@toplion:~$ ifconfig docker0 down
SIOCSIFFLAGS: Operation not permitted
cloudtop@toplion:~$ sudo !!
sudo ifconfig docker0 down
cloudtop@toplion:~$ ifconfig docker0 down
SIOCSIFFLAGS: Operation not permitted
cloudtop@toplion:~$ ifconfig | grep docker0
cloudtop@toplion:~$ brctl show
bridge name bridge id       STP enabled interfaces
docker0     8000.0242f4f0f62b   no      
userbr      8000.3464a91e37bd   no      bond0
                            veth8d3f1ef
virbr0      8000.525400ded333   yes     virbr0-nic

配置默认网桥为自己新创建的网桥

cloudtop@toplion:~$ brctl addbr docker_new0
add bridge failed: Operation not permitted
cloudtop@toplion:~$ sudo brctl addbr docker_new0
cloudtop@toplion:~$ sudo ifconfig docker_new0 172.31.0.1 netmask 255.255.255.0
cloudtop@toplion:~$ sudo ifconfig | grep docker_new0
docker_new0 Link encap:Ethernet  HWaddr de:78:69:dc:34:99  
cloudtop@toplion:~$ su
Password: 
root@toplion:/home/cloudtop# cd 
root@toplion:~# echo 'DOCKER_OPTS="-b=docker_new0"' >> /etc/default/docker 
root@toplion:~# service docker restart
root@toplion:~# ps -ef | grep docker
root      9840     1  1 09:57 ?        00:00:00 /usr/bin/dockerd --tlsverify --tlscacert=/home/cloudtop/ca.pem --tlscert=/home/cloudtop/server-cert.pem --tlskey=/home/cloudtop/server-key.pem -H=172.31.142.111:2376 -H=unix:///var/run/docker.sock
root      9851  9840  0 09:57 ?        00:00:00 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainerd/containerd --shim docker-containerd-shim --runtime docker-runc
root     10001  9536  0 09:57 pts/1    00:00:00 grep --color=auto docker

root@toplion:~# vim /etc/systemd/system/docker.service.d/docker.conf 
root@toplion:~# systemctl daemon-reload
root@toplion:~# service docker restart

root@toplion:~# ps -ef | grep docker
root     11434     1  1 10:02 ?        00:00:00 /usr/bin/dockerd -b=docker_new0 --tlsverify --tlscacert=/home/cloudtop/ca.pem --tlscert=/home/cloudtop/server-cert.pem --tlskey=/home/cloudtop/server-key.pem -H=172.31.142.111:2376 -H=unix:///var/run/docker.sock
root     11445 11434  0 10:02 ?        00:00:00 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainerd/containerd --shim docker-containerd-shim --runtime docker-runc
root     11553  9536  0 10:02 pts/1    00:00:00 grep --color=auto docker
root@toplion:~# exit

创建容器测试

cloudtop@toplion:~$ docker run -itd ubuntu:14.04 /bin/bash
cloudtop@toplion:~$ brctl show
bridge name bridge id       STP enabled interfaces
docker0     8000.0242f4f0f62b   no      
docker_new0     8000.ca267b35699f   no      veth614b5fe
userbr      8000.3464a91e37bd   no      bond0
virbr0      8000.525400ded333   yes     virbr0-nic
进入容器之后：
root@54967ebfb038:/# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:42:ac:1f:00:02  
          inet addr:172.31.0.2  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)