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Docker 入门笔记 - 不同网络之间互通

docker  

创建上图容器的网络环境

  • mynet
docker run -d -P --name tomcat07 --network mynet --network-alias tomcat07-mynet leoiceo/centos7-tomcat  
 1018  docker run -d -P --name tomcat08 --network mynet --network-alias tomcat08-mynet leoiceo/centos7-tomcat
  • testnet
docker run -d -P --name tomcat05 --network testnet --network-alias tomcat05-mynet leoiceo/centos7-tomcat  
 1018  docker run -d -P --name tomcat06 --network testnet--network-alias tomcat06-mynet leoiceo/centos7-tomcat

连接一个容器到一个网络

  • tomcat05连接到mynet
docker network connect mynet tomcat05
  • 查看tomcat05的网络，一个容器两个IP
"Networks": {
                "mynet": {
                    "IPAMConfig": {},
                    "Links": null,
                    "Aliases": [
                        "6e766490792c"
                    ],
                    "NetworkID": "1f12b8a96ac34ff8a5f25e94c3bf3f5f454348ddd6f847e2b685e4c7606ff529",
                    "EndpointID": "1edcb366a88890b155914480d67d2fc7844b8e874a235629a0e2b88d11f4701e",
                    "Gateway": "192.168.200.1",
                    "IPAddress": "192.168.200.4",
                    "IPPrefixLen": 24,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:c0:a8:c8:04",
                    "DriverOpts": {}
                },
                "testnet": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": [
                        "tomcat05-net",
                        "6e766490792c"
                    ],
                    "NetworkID": "f8de1d69de400503565981de021aa1bc068d6f63de532ef8c125348bb6437924",
                    "EndpointID": "7736e3100cec287def3462c2bc492582a8c8c431fa360ff60b80be8eb0192b3f",
                    "Gateway": "172.21.0.1",
                    "IPAddress": "172.21.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:15:00:02",
                    "DriverOpts": null
                }
  • 测试连通性,tomcat05 可以ping通mynet下的tomcat07和tomcat08
[root@centos72 ~]# docker network connect mynet tomcat05^C
[root@centos72 ~]# docker exec -it tomcat05 ping tomcat08
PING tomcat08 (192.168.200.3) 56(84) bytes of data.  
64 bytes from tomcat08.mynet (192.168.200.3): icmp_seq=1 ttl=64 time=0.379 ms  
64 bytes from tomcat08.mynet (192.168.200.3): icmp_seq=2 ttl=64 time=0.106 ms  
^C
--- tomcat08 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms  
rtt min/avg/max/mdev = 0.106/0.242/0.379/0.137 ms  
[root@centos72 ~]# docker exec -it tomcat05 ping tomcat07
PING tomcat07 (192.168.200.2) 56(84) bytes of data.  
64 bytes from tomcat07.mynet (192.168.200.2): icmp_seq=1 ttl=64 time=0.235 ms  
64 bytes from tomcat07.mynet (192.168.200.2): icmp_seq=2 ttl=64 time=0.117 ms

假设要跨网络操作容器，就需要使用docker connect 连通