033、如何自定义容器网络（2019-02-20 周三）-白红宇

033、如何自定义容器网络（2019-02-20 周三）

阅读量：6980 次

发布时间：2019-06-27

本文共 4021 字，大约阅读时间需要 13 分钟。

参考

docker 网络除了 none、host、bridge这三个自动创建的网络，用户也可以根据业务需求创建 user-defined 网络

docker 提供了三种user-defined 网络驱动：bridge、overlay和macvlan。overlay和macvlan用于创建跨主机的网络，将在后面的章节进行学习。

创建自定义bridge网络

      root@docker-lab:~# 
docker network ls
      NETWORK ID          NAME                DRIVER              SCOPE 
      b41bf72cd691        bridge              bridge              local 
      e5cb8d603efd        host                host                local 
      f9dc6032baba        none                null                local 
      root@docker-lab:~# 
brctl show
      bridge name    bridge id        STP enabled    interfaces 
      docker0        8000.02420e6cb404    no         
      root@docker-lab:~# 
docker network create --driver bridge my_net01
      b4372dfaff116af33202d3c4d8ce887da85a08870a4b77811882f8cdd69a19bf 
      root@docker-lab:~# 
docker network ls
      NETWORK ID          NAME                DRIVER              SCOPE 
      b41bf72cd691        bridge              bridge              local 
      e5cb8d603efd        host                host                local 
      b4372dfaff11        my_net01            bridge              local 
      f9dc6032baba        none                null                local 
      root@docker-lab:~# 
brctl show
      bridge name    bridge id        STP enabled    interfaces 
      br-b4372dfaff11        8000.02427eb674da    no         
      docker0        8000.02420e6cb404    no         
      root@docker-lab:~# 
docker network inspect my_net01
      [ 
          { 
               "Name": "my_net01", 
              "Id": " b4372dfaff116af33202d3c4d8ce887da85a08870a4b77811882f8cdd69a19bf", 
              "Created": "2019-02-20T09:03:12.025450041+08:00", 
              "Scope": "local", 
               "Driver": "bridge", 
              "EnableIPv6": false, 
              "IPAM": { 
                  "Driver": "default", 
                  "Options": {}, 
                  "Config": [ 
                      { 
                           "Subnet": "172.18.0.0/16", 
                           "Gateway": "172.18.0.1" 
                      } 
                  ] 
              }, 
              "Internal": false, 
              "Attachable": false, 
              "Ingress": false, 
              "ConfigFrom": { 
                  "Network": "" 
              }, 
              "ConfigOnly": false, 
              "Containers": {}, 
              "Options": {}, 
              "Labels": {} 
          } 
      ] 
      root@docker-lab:~# 
ifconfig
      br-b4372dfaff11 Link encap:Ethernet  HWaddr 02:42:7e:b6:74:da   
                inet addr: 172.18.0.1  Bcast:172.18.255.255  Mask:255.255.0.0 
                UP BROADCAST 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) 

在创建网络的时候会自动分配一段ip地址，我们也可以在创建网络的时候指定

在创建容器的时候，我们还可以给容器指定IP，但必须是使用 --subnet 参数创建的网络才可以

      root@docker-lab:~# 
docker network create --driver bridge --subnet 192.168.0.0/16 --gateway  192.168.0.1 my_net02
      9b5a95b43caef588095b39b4a5ddfd48ed008985f6e4b364db8239eeee18d5ba 
      root@docker-lab:~# ifconfig 
      br-9b5a95b43cae Link encap:Ethernet  HWaddr 02:42:ee:8c:e8:3f   
                inet addr: 192.168.0.1  Bcast:192.168.255.255  Mask:255.255.0.0 
                UP BROADCAST 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) 
      root@docker-lab:~# 
docker network inspect my_net02
      [ 
          { 
               "Name": "my_net02", 
               "Id": "9b5a95b43caef588095b39b4a5ddfd48ed008985f6e4b364db8239eeee18d5ba", 
              "Created": "2019-02-20T09:10:31.02951614+08:00", 
              "Scope": "local", 
               "Driver": "bridge", 
              "EnableIPv6": false, 
              "IPAM": { 
                  "Driver": "default", 
                  "Options": {}, 
                  "Config": [ 
                      { 
                           "Subnet": "192.168.0.0/16", 
                           "Gateway": "192.168.0.1" 
                      } 
                  ] 
              }, 
              "Internal": false, 
              "Attachable": false, 
              "Ingress": false, 
              "ConfigFrom": { 
                  "Network": "" 
              }, 
              "ConfigOnly": false, 
              "Containers": {}, 
              "Options": {}, 
              "Labels": {} 
          } 
      ] 
      root@docker-lab:~# 
docker run -it --network=my_net02 busybox
      / # ip address 
      1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1 
          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 
      5496: eth0@if5497: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue 
          link/ether 02:42:c0:a8:00:02 brd ff:ff:ff:ff:ff:ff 
          inet 192.168.0.2/16 brd 192.168.255.255 scope global eth0 
             valid_lft forever preferred_lft forever 
      root@docker-lab:~# 
docker run -it --network=my_net02 --ip 192.168.9.9 busybox
      / # ip address 
      1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1 
          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 
      5498: eth0@if5499: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue 
          link/ether 02:42:c0:a8:09:09 brd ff:ff:ff:ff:ff:ff 
          inet 192.168.9.9/16 brd 192.168.255.255 scope global eth0 
             valid_lft forever preferred_lft forever 
      / # 