Docker 网络连通

# 测试打通tomcat01到tomcat-net-01
[root@master ~]# docker network connect mynet tomcat01
[root@master ~]# docker network inspect mynet
[
    {
        "Name": "mynet",
        "Id": "5f1e38310933ce7dbe7773742a53ec94bca5866d12b989127911cafe508d70fd",
        "Created": "2022-05-10T15:56:05.138587918+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": {
            "16dc4719ce8c1c7c5690f228a88eed5fc59f61eaaeec2fe5a84c2a1093ae2082": {
                "Name": "tomcat-net-01",
                "EndpointID": "9806ce5af67bda13ecd41fb318f5c6524be8e42a988f9e5ff370a30b5d875b8a",
                "MacAddress": "02:42:c0:a8:00:02",
                "IPv4Address": "192.168.0.2/16",
                "IPv6Address": ""
            },
            "2717187fc62d6f624f04f5af1accde7dd0ca6ab212f76272e96fd7d43dc0c093": {
                "Name": "tomcat-net-02",
                "EndpointID": "d908b92153b2728b27c9a3fa298a7938233ca4c8ff0d338ccab77d49727922dd",
                "MacAddress": "02:42:c0:a8:00:03",
                "IPv4Address": "192.168.0.3/16",
                "IPv6Address": ""
            },
            "d0b0933f23228341015c88049fa84c350c9fcba70c26aa2146647c83e078b64b": {
                "Name": "tomcat01",
                "EndpointID": "7e3efccd2393bf71e51e8c0f9dd89a99e0441ba69a3c58f503408e45ae401f2b",
                "MacAddress": "02:42:c0:a8:00:04",
                "IPv4Address": "192.168.0.4/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

# 连通之后就是将tomcat01 放到了 mynet 网络下

# 一个容器两个ip地址！

# 01 连通
[root@master ~]# docker exec -it tomcat01 ping tomcat-net-01
PING tomcat-net-01 (192.168.0.2) 56(84) bytes of data.
64 bytes from tomcat-net-01.mynet (192.168.0.2): icmp_seq=1 ttl=64 time=0.064 ms
64 bytes from tomcat-net-01.mynet (192.168.0.2): icmp_seq=2 ttl=64 time=0.056 ms
64 bytes from tomcat-net-01.mynet (192.168.0.2): icmp_seq=3 ttl=64 time=0.051 ms

# 02 依旧打不通
[root@master ~]# docker exec -it tomcat02 ping tomcat-net-01
ping: unknown host tomcat-net-01

结论：假设要跨网络操作别人，就需要使用docker network connect 连通！。。。