[英]Publish docker container port and access that port from another docker container
我正在嘗試運行一個帶有docker的postgres容器 ,並從另一個容器訪問它。 重現步驟:
運行postgres容器並發布端口: docker run -e POSTGRES_PASSWORD=test -d -p 5555:5432 postgres:9.6
運行其他容器來訪問postgres: docker run -it debian /bin/bash apt-get update apt-get install telnet telnet 172.17.0.1 5555
結果: Trying 172.17.0.1...
然后失敗。 但是我可以使用localhost從主機訪問它,或者使用public ip從外部訪問它,因為映像允許所有ip,我不會阻止該端口。 ping工作正常。
我已經在我的機器上測試了它,它按預期工作,但我需要知道為什么它不能在這台服務器上工作。
我在哪里可以開始想知道我的服務器上有什么問題?
更新:我嘗試將telnet直接發送到postgres容器的ip(172.17.0.2),我收到以下錯誤: telnet 172.17.0.2 Trying 172.17.0.2... telnet: Unable to connect to remote host: Connection refused
但ping仍然在172.17.0.2工作
在postgres容器上輸出docker檢查:
docker inspect a379130e94f7
[
{
"Id": "a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310",
"Created": "2017-03-31T08:07:36.06939775Z",
"Path": "docker-entrypoint.sh",
"Args": [
"postgres"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 20283,
"ExitCode": 0,
"Error": "",
"StartedAt": "2017-03-31T08:07:37.257557864Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:9910dc9f2ac0dbc193abc4718984cb3ad48989fc02cac4b36ad3d6b7d5d781f9",
"ResolvConfPath": "/var/lib/docker/containers/a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310/hostname",
"HostsPath": "/var/lib/docker/containers/a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310/hosts",
"LogPath": "/var/lib/docker/containers/a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310/a379130e94f7596ebe632e3ae825710c978577a3fb6b245a4f95374051eb8310-json.log",
"Name": "/gallant_thompson",
"RestartCount": 0,
"Driver": "overlay",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {
"5432/tcp": [
{
"HostIp": "",
"HostPort": "5555"
}
]
},
"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": [],
"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": {
"Name": "overlay",
"Data": {
"LowerDir": "/var/lib/docker/overlay/34f43052282b0bcba741b61cb812bc4e05d1d0045820c36781684e2f2f763b41/root",
"MergedDir": "/var/lib/docker/overlay/904ec813189c55332d8cb5ee3dca74e211a0d42a4434f8a90e07b8a05f4d5c5b/merged",
"UpperDir": "/var/lib/docker/overlay/904ec813189c55332d8cb5ee3dca74e211a0d42a4434f8a90e07b8a05f4d5c5b/upper",
"WorkDir": "/var/lib/docker/overlay/904ec813189c55332d8cb5ee3dca74e211a0d42a4434f8a90e07b8a05f4d5c5b/work"
}
},
"Mounts": [
{
"Type": "volume",
"Name": "82dd5d73415e8142eb5bb985a9695f46772328f271ede839cbf55436917ed120",
"Source": "/var/lib/docker/volumes/82dd5d73415e8142eb5bb985a9695f46772328f271ede839cbf55436917ed120/_data",
"Destination": "/var/lib/postgresql/data",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
],
"Config": {
"Hostname": "a379130e94f7",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"5432/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"POSTGRES_PASSWORD=test",
"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=9.6.2-1.pgdg80+1",
"PGDATA=/var/lib/postgresql/data"
],
"Cmd": [
"postgres"
],
"ArgsEscaped": true,
"Image": "postgres:9.6",
"Volumes": {
"/var/lib/postgresql/data": {}
},
"WorkingDir": "",
"Entrypoint": [
"docker-entrypoint.sh"
],
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "55c678dffab73ca25857667ddb003751494d32beb917abd1bba4d77f61071d9f",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"5432/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "5555"
}
]
},
"SandboxKey": "/var/run/docker/netns/55c678dffab7",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "a0f845fa572fd6b15fc7c2ba74d3a302eb353e51ddbafb97d81e8858124808d7",
"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": "16d30671a47d90037673ef30843421eaeeeba41028ec204a8fcea13ac8108f6d",
"EndpointID": "a0f845fa572fd6b15fc7c2ba74d3a302eb353e51ddbafb97d81e8858124808d7",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
}
]
我按照你的步驟,對我而言,它正在發揮作用。
您可以嘗試檢查容器。 首先得到它的名字:
docker ps
然后檢查容器:
docker inspect CONTAINER_NAME
在我的例子中,它是docker inspect zealous_wright。 在這里您可以找到容器的IP地址和端口,嘗試使用此IP和端口。 如果它還沒有工作,也許可以嘗試分配一個5555以外的端口。分享這個容器的檢查數據可能是有用的,也許我們可以看到什么是錯的。
更新:
它可能與代理有關。 我正在使用DockerForMac,因此存在一些差異,但突出的是:
"no_proxy=*.local, 169.254/16"
我有這個,但你沒有。 當我刪除它時,我得到了與你相同的錯誤。 我通過以下方式改變了:
Docker首選項 - >代理 - >使用系統代理,而不是無代理。
希望這可以幫助!
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