Docker除了默认创建的三种网络外,还可以自定义网络。
首先创建一个bridge类型的网络,使用docker network create命令。
- [root@promote ~]# docker network create --driver bridge new_net
- 8f0d50950bb7b86f01f5a62d6a322ede46fa893c515acf10d0e335fa28ccf234
- [root@promote ~]# docker network ls
- NETWORK ID NAME DRIVER SCOPE
- b6a32ec430e9 bridge bridge local
- 9ab80c94885b host host local
- 8f0d50950bb7 new_net bridge local
- c42335728d98 none null local
-
查看一下当前的网络变化。
- [root@promote ~]# brctl show
- bridge name bridge id STP enabled interfaces
- br-8f0d50950bb7 8000.024233fc2bd6 no
- docker0 8000.0242f338d5bb no
-
发现新增了一个网桥,这个网桥就是我们刚刚创建好的网络,可以发现网桥的名字就是刚刚创建的网络的短ID。
既然是我们自己创建的网络那么就可以自定义这个网络,接着重新创建一个网络并自定义这个网络的网段和网关。
- [root@promote ~]# docker network create --driver bridge --subnet 192.168.1.0/24 --gateway 192.168.1.1 new2_net
- 44b6f73a2cd3fd0d5d17124ddb87c5f3dfca1a8ca2c90af1570b1dd4eaa71d67
- [root@promote ~]# docker network ls
- NETWORK ID NAME DRIVER SCOPE
- b6a32ec430e9 bridge bridge local
- 9ab80c94885b host host local
- 44b6f73a2cd3 new2_net bridge local
- 8f0d50950bb7 new_net bridge local
- c42335728d98 none null local
-
使用docker inspect可以看到new2_net网段的详细信息,可以注意到网段和网关都是我们自定义的。
- [root@promote ~]# docker network inspect new2_net
- [
- {
- "Name": "new2_net",
- "Id": "44b6f73a2cd3fd0d5d17124ddb87c5f3dfca1a8ca2c90af1570b1dd4eaa71d67",
- "Created": "2018-07-10T01:56:21.418800602-04:00",
- "Scope": "local",
- "Driver": "bridge",
- "EnableIPv6": false,
- "IPAM": {
- "Driver": "default",
- "Options": {},
- "Config": [
- {
- "Subnet": "192.168.1.0/24",
- "Gateway": "192.168.1.1"
- }
- ]
- },
- "Internal": false,
- "Attachable": false,
- "Containers": {},
- "Options": {},
- "Labels": {}
- }
- ]
-
再查看一下网桥
- [root@promote ~]# brctl show
- bridge name bridge id STP enabled interfaces
- br-44b6f73a2cd3 8000.02421dea9d8a no
- br-8f0d50950bb7 8000.024233fc2bd6 no
- docker0 8000.0242f338d5bb no
- [root@promote ~]# ifconfig br-44b6f73a2cd3
- br-44b6f73a2cd3: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
- inet 192.168.1.1 netmask 255.255.255.0 broadcast 0.0.0.0
- ether 02:42:1d:ea:9d:8a txqueuelen 0 (Ethernet)
- RX packets 0 bytes 0 (0.0 B)
- RX errors 0 dropped 0 overruns 0 frame 0
- TX packets 0 bytes 0 (0.0 B)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
-
可以发现网桥上的IP就是刚刚创建的网络的网关。
接下来就是使用自己创建的网络,使用--network选项即可。
- [root@promote ~]# docker run -it --name busybox --network new2_net docker.io/busybox
- / # ifconfig
- eth0 Link encap:Ethernet HWaddr 02:42:C0:A8:01:02
- inet addr:192.168.1.2 Bcast:0.0.0.0 Mask:255.255.255.0
- inet6 addr: fe80::42:c0ff:fea8:102/64 Scope:Link
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- RX packets:14 errors:0 dropped:0 overruns:0 frame:0
- TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:0
- RX bytes:1156 (1.1 KiB) TX bytes:578 (578.0 B)
-
- 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)
-
可以看到这个容器的IP地址就是我刚刚创建的网络分配的。当然,这个IP地址还可以自己设置静态IP,当然不能设置为new2_net网络网段之外的IP,否则会报错。
使用--ip选项就可以了。
- [root@promote ~]# docker run -it --name busybox --network new2_net --ip 192.168.1.5 docker.io/busybox
- / # ifconfig
- eth0 Link encap:Ethernet HWaddr 02:42:C0:A8:01:05
- inet addr:192.168.1.5 Bcast:0.0.0.0 Mask:255.255.255.0
- inet6 addr: fe80::42:c0ff:fea8:105/64 Scope:Link
- UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
- RX packets:7 errors:0 dropped:0 overruns:0 frame:0
- TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
- collisions:0 txqueuelen:0
- RX bytes:578 (578.0 B) TX bytes:578 (578.0 B)
-
- 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)
-
可以看到Ip为自己设置的静态IP。