即使从本地主机也无法从暴露的端口访问Docker容器 [英] Can't access Docker container on exposed port from anywhere even localhost

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本文介绍了即使从本地主机也无法从暴露的端口访问Docker容器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

几天来我一直在寻找答案，并且不知道寻求帮助的最佳位置，我肯定缺少一些简单的东西.

这个问题对于我的Fedora27工作站和Ubuntu Server 16.04 LTS都是常见的

我已经成功安装了Docker，并且有一些容器在工作，但是其他容器无法在0.0.0.0:或localIP上访问:

我已禁用防火墙并刷新了iptables，除其他外，我正在尝试按照以下说明使我的世界服务器在25565上运行:

要简单地使用最新的稳定版本，请运行

docker run -d -p 25565:25565 --name mc itzg/minecraft-server

标准服务器 端口25565将在您的主机上暴露.

容器运行正常:

[benjbt@localhost ~]$ sudo docker ps
CONTAINER ID  IMAGE                           COMMAND       CREATED        STATUS                  PORTS                                NAMES
3240121d414e  itzg/minecraft-server:latest    "/start"      2 minutes ago  Up 2 minutes (healthy)  0.0.0.0:25565->25565/tcp, 25575/tcp  mc
8f1cf88207e7  portainer/portainer             "/portainer"  9 minutes ago  Up 9 minutes            0.0.0.0:9000->9000/tcp               eager_northcutt

但是，该端口不可访问:

can’t establish a connection to the server at 0.0.0.0:25565

请帮助我了解什么阻止了我的端口?

[benjbt@localhost ~]$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
DOCKER-ISOLATION  all  --  anywhere             anywhere            
DOCKER     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere             ctstate 
RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain DOCKER (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             172.17.0.2           tcp 
dpt:cslistener
ACCEPT     tcp  --  anywhere             172.17.0.3           tcp 
dpt:25565

Chain DOCKER-ISOLATION (1 references)
target     prot opt source               destination         
RETURN     all  --  anywhere             anywhere

故障排除:@BMitch评论的答案

  1. 容器看起来很健康

    CONTAINER ID        IMAGE                         COMMAND             CREATED             STATUS              PORTS                                                NAMES

    6b5822a781c1 rlenferink/minecraft:最新的"/start" 38小时前向上38小时0.0.0.0:25565->25565/tcp，0.0.0.0:25565->25565/udp mc 8f592bb99d8e portainer/portainer"/portainer" 8天前过去45小时0.0.0.0:9000->9000/tcp Practical_goldwasser

    root @ server:〜#码头工人日志mc [08:55:19] [服务器线程/信息]:启动Minecraft服务器1.12.2版 [08:55:19] [服务器线程/信息]:正在加载属性 [08:55:19] [服务器线程/信息]:默认游戏类型:生存 [08:55:19] [服务器线程/INFO]:生成密钥对 [08:55:19] [服务器线程/信息]:在*:25565上启动Minecraft服务器 [08:55:19] [服务器线程/信息]:使用epoll渠道类型 [08:55:19] [服务器线程/INFO]:正在准备级别世界" [08:55:20] [服务器线程/信息]:已加载488个进度 [08:55:20] [服务器线程/信息]:为级别0准备启动区域 [08:55:21] [服务器线程/信息]:准备生成区域:2％ [08:55:22] [服务器线程/INFO]:准备生成区域:18％ [08:55:23] [服务器线程/INFO]:准备生成区域:74％ [08:55:23] [服务器线程/INFO]:完成(3.947秒)！要获取帮助，请键入"help"或?" root @ server:〜#Docker容器检查mc [ { "Id":"6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027"， "Created":"2018-05-13T08:55:08.363756829Z"， "Path":"/开始"， "Args":[]， 状态": { 状态":正在运行"， 正在运行":是的， 已暂停":错误， 正在重新启动":false， "OOMKilled":否， 死亡":错误， "Pid":15719， "ExitCode":0， 错误": ""， "StartedAt":"2018-05-13T08:55:10.734864313Z"， "FinishedAt":"0001-01-01T00:00:00Z" }， 图片":"sha256:648452c4d7be732fc87d5bcb393e94cacd8a22fc7fbb3f98bfb655aaa9f0d400"， "ResolvConfPath":"/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/resolv.conf"， "HostnamePath":"/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/hostname"， "HostsPath":"/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/hosts"， "LogPath":"/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027-json.log"， 名称":"/mc"， "RestartCount":0， "Driver":"overlay2"， "Platform":"linux"， "MountLabel":"， "ProcessLabel":"， "AppArmorProfile":"docker-default"， "ExecIDs":null， "HostConfig":{ 绑定":[ "/mnt/minecraft:/数据" ]， "ContainerIDFile":"， "LogConfig":{ "Type":"json-file"， 配置":{} }， "NetworkMode":"bridge"， "PortBindings":{ "25565/tcp":[ { "HostIp":"， "HostPort":"25565" } ]， "25565/udp":[ { "HostIp":"， "HostPort":"25565" } ] }， "RestartPolicy":{ 名称":否"， "MaximumRetryCount":0 }， 自动删除":否， "VolumeDriver":"， "VolumesFrom":null， "CapAdd":null， "CapDrop":null， "Dns":[]， "DnsOptions":[]， "DnsSearch":[]， "ExtraHosts":null， "GroupAdd":null， "IpcMode":可共享"， "Cgroup":"， 链接":null， "OomScoreAdj":0， "PidMode":"， 特权":否， "PublishAllPorts":否， "ReadonlyRootfs":否， "SecurityOpt":null， "UTSMode":"， "UsernsMode":"， "ShmSize":67108864， 运行时":"runc"， "ConsoleSize":[ 0， 0 ]， 隔离": ""， "CpuShares":0， 内存":0， "NanoCpus":0， "CgroupParent":"， "BlkioWeight":0， "BlkioWeightDevice":[]， "BlkioDeviceReadBps":null， "BlkioDeviceWriteBps":null， "BlkioDeviceReadIOps":null， "BlkioDeviceWriteIOps":null， "CpuPeriod":0， "CpuQuota":0， "CpuRealtimePeriod":0， "CpuRealtimeRuntime":0， "CpusetCpus":"， "CpusetMems":"， 设备": []， "DeviceCgroupRules":null， "DiskQuota":0， "KernelMemory":0， "MemoryReservation":0， "MemorySwap":0， "MemorySwappiness":null， "OomKillDisable":否， "PidsLimit":0， "Ulimits":null， "CpuCount":0， "CpuPercent":0， "IOMaximumIOps":0， "IOMaximumBandwidth":0 }， "GraphDriver":{ 数据": { LowerDir":的/var/lib中/搬运工/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d-INIT/DIFF:在/var/lib中/搬运工/overlay2/a93b9c08d02aa86d8a53f5a32f166c8b40932f1430d4f9e3fd4e9c9e96af6557/DIFF:在/var/lib中/搬运工/overlay2/21b66b86842fd4c456df6ea2493edbabcd0df49f468100c9c2d7d2ef55711501/DIFF:在/var/lib中/搬运工/overlay2/e10484efe17398912f63644cff926875cd10fa8169d1ef2f1164d1000ccd7b06/DIFF:在/var/lib中/搬运工/overlay2/9b110a14a5fd9640fd95161c1fa35ec8cb98b4fb55a7caf70231b1b8ba238559/DIFF:在/var/lib中/搬运工/overlay2/a1cb33255806e73a1d7f9efd49c2bfcbb6edf190ed1976889cb10d3f81682c9f/DIFF:在/var/lib中/搬运工/overlay2/67286cfad81daababf3bac63ff9684c9567cd877e1e2ce4888d59257da4a06ca/DIFF:/VAR /LIB/搬运工/overlay2/6904d0950327c52355e8b34b16d822b4eddf817de272f965f6fc6ad31089227d/DIFF:在/var/lib中/搬运工/overlay2/f6b782d3f37da3bf2c36ed70f6302d282ca4c80d39b3de3933b14902d149cfec/DIFF:在/var/lib中/搬运工/overlay2/e4eac39fc7fade8117216f45e9fe85bb42537714c19c02c70aab4ed62fad474e/DIFF:在/var/lib中/搬运工/overlay2/227df18 48d1a3038188689c1f343ad42758bc6be9872ca8dda843a13b0bbf93e/diff， "MergedDir":"/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/merged"， "UpperDir":"/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/diff"， "WorkDir":"/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/work" }， 名称":"overlay2" }， 山":[ { "Type":"bind"， 来源":"/mnt/minecraft"， 目标":"/数据"， 模式": ""， "RW":是的， 传播":私密" } ]， 配置":{ 主机名":"34cb1418fb23"， 域名":"， 用户":"， "AttachStdin":否， "AttachStdout":否， "AttachStderr":否， "ExposedPorts":{ "25565/tcp":{}， "25565/udp":{} }， "Tty":错误， "OpenStdin":否， "StdinOnce":否， "Env":[ "PATH =/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"， "DEBIAN_FRONTEND =非交互式" ]， "Cmd":[ /开始" ]， "Image":"rlenferink/minecraft:latest"， 数量":{ /数据": {} }， "WorkingDir":"， "Entrypoint":null， "OnBuild":null， 标签": {} }， 网络设置": { 桥": ""， "SandboxID":"e2c693daed0be5a204a83d408262a0fe01b66bdd99ddbb3a53229f5a58d5202c"， "HairpinMode":否， "LinkLocalIPv6Address":"， "LinkLocalIPv6PrefixLen":0， 港口":{ "25565/tcp":[ { "HostIp":"0.0.0.0"， "HostPort":"25565" } ]， "25565/udp":[ { "HostIp":"0.0.0.0"， "HostPort":"25565" } ] }， "SandboxKey":"/var/run/docker/netns/e2c693daed0b"， "SecondaryIPAddresses":null， "SecondaryIPv6Addresses":null， "EndpointID":"819a8255b8ed4d79366a6d6ff4442a441f61d89bdfacc0c193ed2f9340024696"， 网关":"172.17.0.1"， "GlobalIPv6Address":"， "GlobalIPv6PrefixLen":0， "IPAddress":"172.17.0.3"， "IPPrefixLen":16 "IPv6Gateway":"， "MacAddress":"02:42:ac:11:00:03"， 网络":{ 桥": { "IPAMConfig":{}， 链接":null， 别名":null， "NetworkID":"e2ff1284a59794e19dd4dc39b17713ad11e0db3e698735014579405355f516ec"， "EndpointID":"819a8255b8ed4d79366a6d6ff4442a441f61d89bdfacc0c193ed2f9340024696"， 网关":"172.17.0.1"， "IPAddress":"172.17.0.3"， "IPPrefixLen":16 "IPv6Gateway":"， "GlobalIPv6Address":"， "GlobalIPv6PrefixLen":0， "MacAddress":"02:42:ac:11:00:03"， "DriverOpts":null } } } } ]

  2. Netshoot

    有效的Internet连接(仅服务器) Proto Recv-Q Send-Q本地地址外部地址状态
    tcp 0 0 ::: 25565 ::: *听

  3. root@server:~# echo $DOCKER_HOST

    root @ server:〜#

  4. 在本地计算机上

    $ curl http://127.0.0.1:25565 curl:(52)来自服务器的空回复

  5. Firefox上的本地计算机

    有关...的问题加载页面 0.0.0.0:25565 127.0.0.1:25565 本地主机:25565 192.168.15.22:25565

解决方案

要检查的几件事:

  1. 确保您的应用程序运行正常.检查docker logs mc中是否有任何错误消息，并检查docker container inspect mc中容器的最后一次退出/重新启动时间.

  2. 检查应用程序是否正在侦听所需的端口.为此，我喜欢netshoot:

    docker run -it --rm --net container:mc nicolaka/netshoot netstat -lnt

    这应该显示您的端口的输出，并监听0.0.0.0:25565.

  3. 检查您是在本地还是针对远程实例或VM运行docker命令. echo $DOCKER_HOST，如果有值，则连接到该IP地址而不是127.0.0.1.

  4. 如果您登录到远程计算机以运行docker命令(例如ssh)，请先在该计算机上进行本地测试(例如curl http://127.0.0.1:25565)，然后再尝试远程访问它以防止防火墙阻止连接.

  5. 最后，如注释中所述，请勿从客户端连接到0.0.0.0.这实际上是一个通配符IP地址，它告诉服务器应用程序在所有网络接口上进行侦听.您无需从客户端/网络浏览器连接到该服务器.而是使用主机的实际IP或DNS名称.

I have been searching for an answer for this for days and don't know the best place to ask for help, I must be missing something simple.

This problem is common to both my Fedora27 workstation and Ubuntu Server 16.04 LTS

I have installed Docker successfully and have some containers working but others cannot be accessed on 0.0.0.0: or localIP:

I have disabled firewall and flushed iptables, amongst others I am trying to get a minecraft server running on 25565, following this instruction:

To simply use the latest stable version, run

docker run -d -p 25565:25565 --name mc itzg/minecraft-server

where the standard server port, 25565, will be exposed on your host machine.

The container runs OK:

[benjbt@localhost ~]$ sudo docker ps
CONTAINER ID  IMAGE                           COMMAND       CREATED        STATUS                  PORTS                                NAMES
3240121d414e  itzg/minecraft-server:latest    "/start"      2 minutes ago  Up 2 minutes (healthy)  0.0.0.0:25565->25565/tcp, 25575/tcp  mc
8f1cf88207e7  portainer/portainer             "/portainer"  9 minutes ago  Up 9 minutes            0.0.0.0:9000->9000/tcp               eager_northcutt

However, the port is not accessible: 

can’t establish a connection to the server at 0.0.0.0:25565

Please help me understand what is blocking my port?

[benjbt@localhost ~]$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
DOCKER-ISOLATION  all  --  anywhere             anywhere            
DOCKER     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere             ctstate 
RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain DOCKER (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             172.17.0.2           tcp 
dpt:cslistener
ACCEPT     tcp  --  anywhere             172.17.0.3           tcp 
dpt:25565

Chain DOCKER-ISOLATION (1 references)
target     prot opt source               destination         
RETURN     all  --  anywhere             anywhere

TROUBLESHOOTING: Answers from @BMitch comment

  1. The Container seems healthy

    CONTAINER ID        IMAGE                         COMMAND             CREATED             STATUS              PORTS                                                NAMES

    6b5822a781c1 rlenferink/minecraft:latest "/start" 38 hours ago Up 38 hours 0.0.0.0:25565->25565/tcp, 0.0.0.0:25565->25565/udp mc 8f592bb99d8e portainer/portainer "/portainer" 8 days ago Up 45 hours 0.0.0.0:9000->9000/tcp practical_goldwasser

    root@server:~# docker logs mc [08:55:19] [Server thread/INFO]: Starting minecraft server version 1.12.2 [08:55:19] [Server thread/INFO]: Loading properties [08:55:19] [Server thread/INFO]: Default game type: SURVIVAL [08:55:19] [Server thread/INFO]: Generating keypair [08:55:19] [Server thread/INFO]: Starting Minecraft server on *:25565 [08:55:19] [Server thread/INFO]: Using epoll channel type [08:55:19] [Server thread/INFO]: Preparing level "world" [08:55:20] [Server thread/INFO]: Loaded 488 advancements [08:55:20] [Server thread/INFO]: Preparing start region for level 0 [08:55:21] [Server thread/INFO]: Preparing spawn area: 2% [08:55:22] [Server thread/INFO]: Preparing spawn area: 18% [08:55:23] [Server thread/INFO]: Preparing spawn area: 74% [08:55:23] [Server thread/INFO]: Done (3.947s)! For help, type "help" or "?" root@server:~# docker container inspect mc [ { "Id": "6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027", "Created": "2018-05-13T08:55:08.363756829Z", "Path": "/start", "Args": [], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 15719, "ExitCode": 0, "Error": "", "StartedAt": "2018-05-13T08:55:10.734864313Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:648452c4d7be732fc87d5bcb393e94cacd8a22fc7fbb3f98bfb655aaa9f0d400", "ResolvConfPath": "/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/resolv.conf", "HostnamePath": "/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/hostname", "HostsPath": "/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/hosts", "LogPath": "/var/lib/docker/containers/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027/6b5822a781c147012e1aa279320ce1cb235193a11da2e8a640848ce252c56027-json.log", "Name": "/mc", "RestartCount": 0, "Driver": "overlay2", "Platform": "linux", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "docker-default", "ExecIDs": null, "HostConfig": { "Binds": [ "/mnt/minecraft:/data" ], "ContainerIDFile": "", "LogConfig": { "Type": "json-file", "Config": {} }, "NetworkMode": "bridge", "PortBindings": { "25565/tcp": [ { "HostIp": "", "HostPort": "25565" } ], "25565/udp": [ { "HostIp": "", "HostPort": "25565" } ] }, "RestartPolicy": { "Name": "no", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "Dns": [], "DnsOptions": [], "DnsSearch": [], "ExtraHosts": null, "GroupAdd": null, "IpcMode": "shareable", "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": [], "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": null, "OomKillDisable": false, "PidsLimit": 0, "Ulimits": null, "CpuCount": 0, "CpuPercent": 0, "IOMaximumIOps": 0, "IOMaximumBandwidth": 0 }, "GraphDriver": { "Data": { "LowerDir": "/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d-init/diff:/var/lib/docker/overlay2/a93b9c08d02aa86d8a53f5a32f166c8b40932f1430d4f9e3fd4e9c9e96af6557/diff:/var/lib/docker/overlay2/21b66b86842fd4c456df6ea2493edbabcd0df49f468100c9c2d7d2ef55711501/diff:/var/lib/docker/overlay2/e10484efe17398912f63644cff926875cd10fa8169d1ef2f1164d1000ccd7b06/diff:/var/lib/docker/overlay2/9b110a14a5fd9640fd95161c1fa35ec8cb98b4fb55a7caf70231b1b8ba238559/diff:/var/lib/docker/overlay2/a1cb33255806e73a1d7f9efd49c2bfcbb6edf190ed1976889cb10d3f81682c9f/diff:/var/lib/docker/overlay2/67286cfad81daababf3bac63ff9684c9567cd877e1e2ce4888d59257da4a06ca/diff:/var/lib/docker/overlay2/6904d0950327c52355e8b34b16d822b4eddf817de272f965f6fc6ad31089227d/diff:/var/lib/docker/overlay2/f6b782d3f37da3bf2c36ed70f6302d282ca4c80d39b3de3933b14902d149cfec/diff:/var/lib/docker/overlay2/e4eac39fc7fade8117216f45e9fe85bb42537714c19c02c70aab4ed62fad474e/diff:/var/lib/docker/overlay2/227df1848d1a3038188689c1f343ad42758bc6be9872ca8dda843a13b0bbf93e/diff", "MergedDir": "/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/merged", "UpperDir": "/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/diff", "WorkDir": "/var/lib/docker/overlay2/4f5f630442b65a59c7f174a8aad1dc356cb6f565e76b2ca4afa49132afbaf30d/work" }, "Name": "overlay2" }, "Mounts": [ { "Type": "bind", "Source": "/mnt/minecraft", "Destination": "/data", "Mode": "", "RW": true, "Propagation": "rprivate" } ], "Config": { "Hostname": "34cb1418fb23", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "25565/tcp": {}, "25565/udp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "DEBIAN_FRONTEND=noninteractive" ], "Cmd": [ "/start" ], "Image": "rlenferink/minecraft:latest", "Volumes": { "/data": {} }, "WorkingDir": "", "Entrypoint": null, "OnBuild": null, "Labels": {} }, "NetworkSettings": { "Bridge": "", "SandboxID": "e2c693daed0be5a204a83d408262a0fe01b66bdd99ddbb3a53229f5a58d5202c", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": { "25565/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "25565" } ], "25565/udp": [ { "HostIp": "0.0.0.0", "HostPort": "25565" } ] }, "SandboxKey": "/var/run/docker/netns/e2c693daed0b", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "819a8255b8ed4d79366a6d6ff4442a441f61d89bdfacc0c193ed2f9340024696", "Gateway": "172.17.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:ac:11:00:03", "Networks": { "bridge": { "IPAMConfig": {}, "Links": null, "Aliases": null, "NetworkID": "e2ff1284a59794e19dd4dc39b17713ad11e0db3e698735014579405355f516ec", "EndpointID": "819a8255b8ed4d79366a6d6ff4442a441f61d89bdfacc0c193ed2f9340024696", "Gateway": "172.17.0.1", "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:ac:11:00:03", "DriverOpts": null } } } } ]

  2. Netshoot

    Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State
    tcp 0 0 :::25565 :::* LISTEN 

  3. root@server:~# echo $DOCKER_HOST

    root@server:~#

  4. On local machine

    $ curl http://127.0.0.1:25565 curl: (52) Empty reply from server

  5. Local machine on firefox

    Problem loading page on... 0.0.0.0:25565 127.0.0.1:25565 localhost:25565 192.168.15.22:25565

解决方案

Several things to check:

  1. Make sure your application is healthy. Check docker logs mc for any error messages and docker container inspect mc for the last exit/restart time of the container.

  2. Check that the application is listening on the desired port. For this, I like netshoot:

    docker run -it --rm --net container:mc nicolaka/netshoot netstat -lnt

    This should show output with your port, listening on 0.0.0.0:25565.

  3. Check if you are running your docker commands locally or against a remote instance or VM. echo $DOCKER_HOST and if that has a value, connect to that IP address instead of 127.0.0.1.

  4. If you are logged into a remote machine to run docker commands (e.g. ssh), test locally on that machine first (e.g. curl http://127.0.0.1:25565) before trying to access it remotely where firewalls may block the connectivity.

  5. Lastly, as mentioned in the comments, don't connect to 0.0.0.0 from the client. This is effectively a wildcard IP address that tells the server application to listen on all network interfaces. You don't connect to that from your client/web browser. Instead, use the actual IP or DNS name of the host.

这篇关于即使从本地主机也无法从暴露的端口访问Docker容器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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