可以看到名为b2的容器IP地址与第一个容器的IP地址不是一样的，也就是说并没有共享网络，此时如果我们将第二个容器的启动方式改变一下，就可以使名为b2的容器IP与B1容器IP一致，也即共享IP，但不共享文件系统。

在b1容器上创建一个目录

/ # mkdir /tmp/data
/ # ls /tmp/
data
/ # 

到b2容器上检查/tmp目录会发现并没有这个目录，因为文件系统是处于隔离状态，仅仅是共享了网络而已。

在b2容器上部署一个站点

/ # ls /tmp/
/ # 

//创建一个站点
/ # echo 'hello world' > /tmp/index.html
/ # ls /tmp/
index.html
/ # httpd -h /tmp
/ # netstat -anlt
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       
tcp        0      0 :::80                   :::*                    LISTEN      

在b1容器上用本地地址去访问此站点

/ # wget -O  -q 127.0.0.1:80	//没有共享是无法访问b2上的网站 //127.0.0.1只能在本机上才能访问
wget: can't connect to remote host (127.0.0.1): Connection refused

/ # wget -O  -q 172.17.0.3:80
hello world

由此可见，container模式下的容器间关系就相当于一台主机上的两个不同进程

host模式配置

启动容器时直接指明模式为host

[root@localhost ~]# docker run -it --name b2 --rm --network host busybox
/ # ifconfig
docker0   Link encap:Ethernet  HWaddr 02:42:DC:1B:B2:1E  
          inet addr:172.17.0.1  Bcast:172.17.255.255  Mask:255.255.0.0
          inet6 addr: fe80::42:dcff:fe1b:b21e/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:28 (28.0 B)  TX bytes:1406 (1.3 KiB)

ens33     Link encap:Ethernet  HWaddr 00:0C:29:6D:53:62  
          inet addr:192.168.111.135  Bcast:192.168.111.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe6d:5362/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:58165 errors:0 dropped:0 overruns:0 frame:0
          TX packets:96466 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:5386642 (5.1 MiB)  TX bytes:19720040 (18.8 MiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          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)

真机的网卡

[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:6d:53:62 brd ff:ff:ff:ff:ff:ff
    inet 192.168.111.135/24 brd 192.168.111.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe6d:5362/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:dc:1b:b2:1e brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:dcff:fe1b:b21e/64 scope link 
       valid_lft forever preferred_lft forever

此时如果我们在这个容器中启动一个http站点，我们就可以直接用宿主机的IP直接在浏览器中访问这个容器中的站点了。