我用docker hub构建了一个docker容器：
docker run --name some-postgis -e POSTGRES_PASSWORD=mysecretpassword -d mdillon/postgis
docker run -it --link some-postgis:postgres --rm postgres \
sh -c 'exec psql -h "$POSTGRES_PORT_5432_TCP_ADDR" -p "$POSTGRES_PORT_5432_TCP_PORT" -U postgres'
检查：
$ docker inspect b89c7f54e76a
[
{
"Id": "b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f",
"Created": "2017-08-08T14:34:02.375576229Z",
"Path": "docker-entrypoint.sh",
"Args": [
"postgres"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 8293,
"ExitCode": 0,
"Error": "",
"StartedAt": "2017-08-09T10:08:11.317833478Z",
"FinishedAt": "2017-08-08T18:18:17.110547652Z"
},
"Image": "sha256:1c5da6633b90bfb50486b543dd11c7efb800e6d27d338d51aaf82e929d83bde2",
"ResolvConfPath": "/var/lib/docker/containers/b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f/hostname",
"HostsPath": "/var/lib/docker/containers/b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f/hosts",
"LogPath": "/var/lib/docker/containers/b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f/b89c7f54e76aa82bd142e1eb45a1f12008bf2ee2f94e392b08b386493b58891f-json.log",
"Name": "/psql-futurSahel",
"RestartCount": 0,
"Driver": "aufs",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "docker-default",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0
},
"GraphDriver": {
"Data": null,
"Name": "aufs"
},
"Mounts": [
{
"Type": "volume",
"Name": "bb59bb5d17ad6b3ca59d7acf5c21936ce19fb15ec9fa13388ce63c01ed559f37",
"Source": "/var/lib/docker/volumes/bb59bb5d17ad6b3ca59d7acf5c21936ce19fb15ec9fa13388ce63c01ed559f37/_data",
"Destination": "/var/lib/postgresql/data",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
"Config": {
"Hostname": "b89c7f54e76a",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"5432/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"POSTGRES_PASSWORD=postgres",
"PATH=/usr/lib/postgresql/9.6/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"GOSU_VERSION=1.7",
"LANG=en_US.utf8",
"PG_MAJOR=9.6",
"PG_VERSION=9.6.3-1.pgdg80+1",
"PGDATA=/var/lib/postgresql/data",
"POSTGIS_MAJOR=2.3",
"POSTGIS_VERSION=2.3.2+dfsg-1~exp2.pgdg80+1"
],
"Cmd": [
"postgres"
],
"ArgsEscaped": true,
"Image": "mdillon/postgis",
"Volumes": {
"/var/lib/postgresql/data": {}
},
"WorkingDir": "",
"Entrypoint": [
"docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "07536f68477b1f345cff2caa3118d7ee9251b0a84a2ef6a1f641c24aecd1ae53",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"5432/tcp": null
},
"SandboxKey": "/var/run/docker/netns/07536f68477b",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "98ca66036295516d5d653b865f3bf4de976b1f8fc704269ef5d7d067817a8c4d",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "1f95d91f247bb8cb99e8eb5c1d3911b82812947880c9e2ba6ec4db3cdc8f131b",
"EndpointID": "98ca66036295516d5d653b865f3bf4de976b1f8fc704269ef5d7d067817a8c4d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
它就像我桌面上的魅力一样，我可以使用psql与服务器进行交互。它完美无缺！
psql -h 172.17.0.2 -p 5432 -U postgres
但我想允许我的同事连接数据库，我不明白它是如何工作的......
此时（如果我们假设我的本地IP为192.168.0.14）
psql -h 192.168.0.14 -p 5432 -U postgres
不起作用......
我找到了一些链接：
但它仍然清楚地指出。
答案 0 :(得分：2)
您需要做的是在运行容器时进行端口映射。
docker run -p 5432:5432 --name some-postgis -e POSTGRES_PASSWORD=mysecretpassword -d mdillon/postgis
这会将主机上的5432（左侧）映射到容器上的5432（右侧）。只要您的IP可以从他的机器上访问，您的同事就能够访问数据库
答案 1 :(得分：0)
您的同事之所以无法连接，是因为您使用的是Host-Machine到Docker内部IP地址，而您的同事的计算机却没有意识到172.17.0.2地址托管在您的计算机上。
因此正确的机制就是@Tarun Lalwani提到的
现在您的同事将使用您的机器（即dockers公共IP地址的主机）进行连接。