docker 容器中访问宿主机或者其他容器详解程序员

1. 首先可以用命令查看桥接模式下的所有网络

docker network inspect bridge 

[ 
    { 
        "Name": "bridge", 
        "Id": "587fe8337798f3f26e590f9a6b8f67d98641077412924e5c7a48f088cd27f48d", 
        "Created": "2020-06-28T16:07:26.189913852+08:00", 
        "Scope": "local", 
        "Driver": "bridge", 
        "EnableIPv6": false, 
        "IPAM": { 
            "Driver": "default", 
            "Options": null, 
            "Config": [ 
                { 
                    "Subnet": "172.17.0.0/16", 
                    "Gateway": "172.17.0.1" 
                } 
            ] 
        }, 
        "Internal": false, 
        "Attachable": false, 
        "Ingress": false, 
        "ConfigFrom": { 
            "Network": "" 
        }, 
        "ConfigOnly": false, 
        "Containers": { 
            "057c865e764d2965e6bb65161d14f42956755921058e844eadb8f60e854bb5b9": { 
                "Name": "some-redmine2", 
                "EndpointID": "1fc4f99867419fd5c6cf76cba7b8d60601b1ddcb6e6ae8b97c137db21c3f76d4", 
                "MacAddress": "02:42:ac:11:00:03", 
                "IPv4Address": "172.17.0.3/16", 
                "IPv6Address": "" 
            }, 
            "08e9b1bcc06bff2a14de1ed167fdba16a814b8fdd2fe50f83ca7b5ca92808298": { 
                "Name": "pgadmin4", 
                "EndpointID": "601b35110e30272fda12e7c8f3a2c62fe15752b7322019a1da87971c79a07ebe", 
                "MacAddress": "02:42:ac:11:00:04", 
                "IPv4Address": "172.17.0.4/16", 
                "IPv6Address": "" 
            }, 
            "2290b60f3ac6fc6796beb5ad59838f6c8af5258d8a44213bfb0470eb03767b89": { 
                "Name": "db", 
                "EndpointID": "b69debde9c98562686bb21dc28a7df064579619dd5cf43265077ee5fc413c206", 
                "MacAddress": "02:42:ac:11:00:02", 
                "IPv4Address": "172.17.0.2/16", 
                "IPv6Address": "" 
            }, 
            "88f3588039234bad40b020e000fe33d70265741d091fd057d95512fd0c01beb1": { 
                "Name": "odoo12-test", 
                "EndpointID": "5496fc9922090053943641c97f6ef7ed1a2811cc12666f8c89fffccdf85b9dab", 
                "MacAddress": "02:42:ac:11:00:05", 
                "IPv4Address": "172.17.0.5/16", 
                "IPv6Address": "" 
            }, 
            "96282a47e1cd91c9f8b1ecb41eb8e92f79dcd310aefef5b0fc34aeac369031e2": { 
                "Name": "vscode", 
                "EndpointID": "e10e2bbc423ef21d5a6538656ff27a66bc4d9d1707437d41e62c992573903969", 
                "MacAddress": "02:42:ac:11:00:0a", 
                "IPv4Address": "172.17.0.10/16", 
                "IPv6Address": "" 
            }, 
            "e39fa67e7a7e11e97b0305c9ca7c73e94c4b27bc5446414b553ad46cf6ebb1d1": { 
                "Name": "odoo14", 
                "EndpointID": "07220b6cc2ce860d6ce6781fc3409f4498df9339bd082606a00c39053966d8bd", 
                "MacAddress": "02:42:ac:11:00:07", 
                "IPv4Address": "172.17.0.7/16", 
                "IPv6Address": "" 
            } 
        }, 
        "Options": { 
            "com.docker.network.bridge.default_bridge": "true", 
            "com.docker.network.bridge.enable_icc": "true", 
            "com.docker.network.bridge.enable_ip_masquerade": "true", 
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0", 
            "com.docker.network.bridge.name": "docker0", 
            "com.docker.network.driver.mtu": "1500" 
        }, 
        "Labels": {} 
    } 
] 

2. 可以得到的信息:
   • docker 网络名称:bridge
   • 子网掩码:172.17.0.0/16
   • 在该网段下的所有容器名称,以及对应的IP地址
3. 在同一个网段下,容器之间的连接就畅通无阻了.
4. 宿主机的主机号默认为1,即 172.17.0.1