有些需求是把这个容器与宿主机在同一个网段，但是本人不建议这样子去操作，因为一个容器本身就是一个封装好的服务。建议去按默认的网络去实现。
临时设置
[root@linux-docker01 ~]# vim a.sh
# 网桥名称
br_name=br0
# 添加网桥
brctl addbr $br_name
# 给网桥设置IP
ip addr add 192.168.43.10/24 dev $br_name
# 删除已存在的eth0网卡配置
ip addr del 192.168.43.10/24 dev ens32
# 激活网桥
ip link set $br_name up
# 添加eth0到网桥
brctl addif $br_name ens32
# 添加路由
ip route add default via 192.168.43.2 dev br0
[root@linux-docker01 ~]# sh a.sh
[root@linux-docker01 ~]# ping baidu.com
PING baidu.com (220.181.57.216) 56(84) bytes of data.
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=1 ttl=128 time=44.2 ms
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=2 ttl=128 time=48.4 ms
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=3 ttl=128 time=43.6 ms
桥接成功
[root@linux-docker01 ~]# brctl show
bridge name bridge id STP enabled interfaces
br-67e7e0736b2c 8000.0242f6e74907 no
br0 8000.000c2946f293 no ens32
docker0 8000.024232deb134 no veth0e8ad3d
编辑配置文件
[root@linux-docker01 ~]# vim /usr/lib/systemd/system/docker.service
[root@linux-docker01 ~]# systemctl daemon-reload
[root@linux-docker01 ~]# systemctl restart docker
配置固定IP
C_ID=$(docker run -itd --net=none ubuntu)
C_PID=$(docker inspect -f '{{.State.Pid}}' $C_ID)
# 创建network namespace目录并将容器的network namespace软连接到此目录，以便ip netns命令读取
mkdir -p /var/run/netns
ln -s /proc/$C_PID/ns/net /var/run/netns/$C_PID
# 添加虚拟网卡veth+容器PID，类型是veth pair，名称是vp+容器PID
ip link add veth$C_PID type veth peer name vp$C_PID
# 添加虚拟网卡到br0网桥
brctl addif br0 veth$C_PID
# 激活虚拟网卡
ip link set veth$C_PID up
# 设置容器网络信息
IP='192.168.43.123/24'
GW='192.168.43.2'
# 给进程配置一个network namespace
ip link set vp$C_PID netns $C_PID
# 在容器进程里面设置网卡信息
ip netns exec $C_PID ip link set dev vp$C_PID name eth0
ip netns exec $C_PID ip link set eth0 up
ip netns exec $C_PID ip addr add $IP dev eth0
ip netns exec $C_PID ip route add default via 192.168.43.2
pipework工具配置容器固定IP
[root@linux-docker01 ~]# yum install git -y
[root@linux-docker01 ~]# git clone https://github.com/jpetazzo/pipework.git
[root@linux-docker01 ~]# mv pipework/pipework /usr/bin/
[root@linux-docker01 ~]# docker run -itd --name bs2 --net none busybox
d28efc7d562301a67d40f63930c75d9b7277137c9f7adc7b5568223f3496aa83
[root@linux-docker01 ~]# pipework br0 bs2 192.168.43.55/24@192.168.43.2
[root@linux-docker01 ~]# docker exec -it bs2 sh
/ # ifconfig
eth1 Link encap:Ethernet HWaddr 46:76:F4:DA:DC:39
inet addr:192.168.43.55 Bcast:192.168.43.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:730 (730.0 B) TX bytes:42 (42.0 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/ # ping baidu.com
PING baidu.com (220.181.57.216): 56 data bytes
64 bytes from 220.181.57.216: seq=0 ttl=128 time=57.848 ms
64 bytes from 220.181.57.216: seq=1 ttl=128 time=46.033 ms
注：重启容器，IP会失效。
