是否有任何不显眼的配置会导致所有端口都被发布(可在 docker 容器内外访问)？包含在没有任何选项的情况下运行图像，直接如下:
docker run -it xxx/xxx /bin/bash
这是检查输出(请注意，“PublishAllPorts”设置为 false，仅显式暴露了几个端口):
{
"Id": "c0170d0dfde1a92550e4f3ac999cd13c9711f3b15493325d85a4b9c9542f5d01",
"Created": "2016-12-02T05:19:27.91485137Z",
"Path": "/bin/bash",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 26493,
"ExitCode": 0,
"Error": "",
"StartedAt": "2016-12-05T14:44:38.270973904Z",
"FinishedAt": "2016-12-05T14:43:57.974501757Z"
},
"Image": "sha256:2b6dff71e5b964409749dacabe5653d57879b860bfbddf37bb40a51c3d3c5778",
"ResolvConfPath": "/var/lib/docker/containers/c0170d0dfde1a92550e4f3ac999cd13c9711f3b15493325d85a4b9c9542f5d01/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/c0170d0dfde1a92550e4f3ac999cd13c9711f3b15493325d85a4b9c9542f5d01/hostname",
"HostsPath": "/var/lib/docker/containers/c0170d0dfde1a92550e4f3ac999cd13c9711f3b15493325d85a4b9c9542f5d01/hosts",
"LogPath": "",
"Name": "/pedantic_perlman",
"RestartCount": 0,
"Driver": "devicemapper",
"MountLabel": "system_u:object_r:svirt_sandbox_file_t:s0:c570,c970",
"ProcessLabel": "system_u:system_r:svirt_lxc_net_t:s0:c570,c970",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "journald",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"ShmSize": 67108864,
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": null,
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"KernelMemory": 0,
"Memory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": -1,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null
},
"GraphDriver": {
"Name": "devicemapper",
"Data": {
"DeviceId": "38",
"DeviceName": "docker-253:0-1970585-466a43a88fda2e37aa154f06eaf6dcdc1c7a68890be72471ded27e3e45f0b960",
"DeviceSize": "10737418240"
}
},
"Mounts": [],
"Config": {
"Hostname": "c0170d0dfde1",
"Domainname": "",
"User": "",
"AttachStdin": true,
"AttachStdout": true,
"AttachStderr": true,
"ExposedPorts": {
"11000/tcp": {},
"11443/tcp": {},
"16000/tcp": {},
"16001/tcp": {},
"19888/tcp": {},
"2181/tcp": {},
"22/tcp": {},
"60010/tcp": {},
"7077/tcp": {},
"8020/tcp": {},
"8042/tcp": {},
"8080/tcp": {},
"8088/tcp": {},
"8888/tcp": {},
"8983/tcp": {},
"9090/tcp": {},
"9092/tcp": {}
},
"Tty": true,
"OpenStdin": true,
"StdinOnce": true,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"TERM=xterm"
],
"Cmd": [
"/bin/bash"
],
"Image": "docker.io/caioquirino/docker-cloudera-quickstart",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "e33871c583ead85bb1d5c68160f19fd67007e3f0fd18acaf92706d88e941d6a3",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"11000/tcp": null,
"11443/tcp": null,
"16000/tcp": null,
"16001/tcp": null,
"19888/tcp": null,
"2181/tcp": null,
"22/tcp": null,
"60010/tcp": null,
"7077/tcp": null,
"8020/tcp": null,
"8042/tcp": null,
"8080/tcp": null,
"8088/tcp": null,
"8888/tcp": null,
"8983/tcp": null,
"9090/tcp": null,
"9092/tcp": null
},
"SandboxKey": "/var/run/docker/netns/e33871c583ea",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "dfb52838892c31a3428efd6d0996b6f9ccbe2f9edc71a2a2e2cf0c08c622d538",
"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": "17de08a7428d3243288647a88e991cdf8989b3c9aab17213a24acfbf396ded3a",
"EndpointID": "dfb52838892c31a3428efd6d0996b6f9ccbe2f9edc71a2a2e2cf0c08c622d538",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
}
但我似乎仍然可以访问任何端口:
[root@localhost bryan]# curl 172.17.0.2:50070
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最佳答案
公开的端口在您的 Dockerfile 中定义并合并到镜像配置中。它们告诉 docker 容器监听哪些端口，但默认情况下不发布它们。您需要使用 -p 发布特定端口或使用 -P 将所有端口发布到随机主机端口.
根据您的 linux iptables 配置，您将能够直接与 docker 主机中的容器接口(interface)/端口通信，如您的示例所示。除非您可以通过 localhost 接口(interface)访问这些端口，否则这些端口不会向外界发布。您可以使用以下命令验证这一点:
curl 127.0.0.1:50070
关于docker - 为什么默认情况下所有端口都使用此 Docker 镜像发布，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40980242/