提问
我想从容器中获取docker容器名称.我需要这些信息,因为我正在从Dockerfile中运行一个脚本作为ENTRYPOINT,它需要知道节点号.我正在将–scale与docker-compose结合使用来创建我的图像的群集.我可以获取容器的主机名,即容器ID.但是有没有办法从容器内部获取容器名称？
最佳答案
Docker remote apis应该为您工作.根据您的Docker版本,使用适当版本的远程api.有关更多信息,请检查this.
我利用container-inspect API来检索容器名称.
跟着这些步骤：
>确定docker守护程序在哪个端口上侦听.在我的情况下,这是默认端口2375.
$netstat -anp | grep dockerd
tcp 0 0 :::2375 :::* LISTEN 7/dockerd
tcp 0 0 ::ffff:172.18.0.110:2375 ::ffff:172.18.0.1:29445 ESTABLISHED 7/dockerd
unix 2 [ ACC ] STREAM LISTENING 1242188041 7/dockerd /var/run/docker/metrics.sock
unix 2 [ ACC ] STREAM LISTENING 1242187193 7/dockerd /var/run/docker.sock
unix 2 [ ACC ] STREAM LISTENING 1242186375 7/dockerd /var/run/docker/libnetwork/79ba9bb412445c757dd4cc2fc30c1cbc7efde8482bdc4c1cf15c4ce0e4190752.sock
unix 3 [ ] STREAM CONNECTED 1242187211 7/dockerd
unix 3 [ ] STREAM CONNECTED 1242183625 7/dockerd
unix 3 [ ] STREAM CONNECTED 1242184185 7/dockerd
>运行容器并检索容器名称.
$docker run -it alpine sh
/ # apk update
/ # apk add curl
/ # apk add jq
/ # curl -s 192.168.0.37:2375/containers/$HOSTNAME/json | jq -r ".Name"
/zen_wescoff
注意：192.168.0.37是我的机器的IP.此外,除了容器名称之外,您还可以使用这些docker远程api检索很多信息.
容器检查API的示例完整输出
/ # curl -s 192.168.0.37:2375/containers/$HOSTNAME/json?pretty=true
{
"Id": "3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9",
"Created": "2019-06-20T09:09:51.258807808Z",
"Path": "sh",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 3824,
"ExitCode": 0,
"Error": "",
"StartedAt": "2019-06-20T09:09:53.341188978Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:4d90542f0623c71f1f9c11be3da23167174ac9d93731cf91912922e916bab02c",
"ResolvConfPath": "/var/lib/docker/containers/3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9/hostname",
"HostsPath": "/var/lib/docker/containers/3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9/hosts",
"LogPath": "/var/lib/docker/containers/3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9/3409974f45bedacd3adbe663679e4eb7a74006483e3a3b04985e5a7cc65229b9-json.log",
"Name": "/jovial_moser",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"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,
"Capabilities": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"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,
"DeviceRequests": null,
"DiskQuota": 0,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": ["/proc/asound", "/proc/acpi", "/proc/kcore", "/proc/keys", "/proc/latency_stats", "/proc/timer_list", "/proc/timer_stats", "/proc/sched_debug", "/proc/scsi", "/sys/firmware"],
"ReadonlyPaths": ["/proc/bus", "/proc/fs", "/proc/irq", "/proc/sys", "/proc/sysrq-trigger"]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/a5f16849169cb7c773f4d204089f8e53daf5b648864846ee1d1f076cef9f8a39-init/diff:/var/lib/docker/overlay2/edb63c15d70f0a29c60f3725ed952dd76439bef4da8915e66ffe6ed1ecf02107/diff",
"MergedDir": "/var/lib/docker/overlay2/a5f16849169cb7c773f4d204089f8e53daf5b648864846ee1d1f076cef9f8a39/merged",
"UpperDir": "/var/lib/docker/overlay2/a5f16849169cb7c773f4d204089f8e53daf5b648864846ee1d1f076cef9f8a39/diff",
"WorkDir": "/var/lib/docker/overlay2/a5f16849169cb7c773f4d204089f8e53daf5b648864846ee1d1f076cef9f8a39/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "3409974f45be",
"Domainname": "",
"User": "",
"AttachStdin": true,
"AttachStdout": true,
"AttachStderr": true,
"Tty": true,
"OpenStdin": true,
"StdinOnce": true,
"Env": ["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"],
"Cmd": ["sh"],
"Image": "alpine",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "7f41a5043e99bb110e215ac8e13a8a2c37838b25c6a9fa985584ff458c1e52cc",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/7f41a5043e99",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "7aa9f269772edff8a9b7f895d51d6dd472a5820ff56a643134465ab8bff1914e",
"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": "55987078c24843c830172de5c352b00c96cb3f177a349437dd7bee9bd1814e86",
"EndpointID": "7aa9f269772edff8a9b7f895d51d6dd472a5820ff56a643134465ab8bff1914e",
"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
}
}
}
}
因此,简而言之,您需要知道您机器的ip以及docker守护程序正在侦听的端口,以从容器内检索任何类型的信息.
希望这会有所帮助,让我知道.
