Docker swarm 獲取service的container資訊
- 2019 年 10 月 3 日
- 筆記
我們可以通過docker service create創建服務，例如：
docker service create --name mysql mysql:latest服務創建好後，如何來獲取該service包含的容器資訊呢？比如獲取剛才創建的mysql服務的容器。我們可以通過docker service ps命令來獲取，
命令行方式
~# docker service ps mysql ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS lvskmv1lkhz6 mysql.1 mysql:latest docker86-9 Running Running 3 days ago 遺憾的是返回的數據不包含containerId，只有serviceId, 可以通過docker inspect來獲取service詳情
~# docker inspect lvskmv1lkhz6 [ { "ID": "lvskmv1lkhz6bvynfuxa0jqgn", "Version": { "Index": 21 }, "CreatedAt": "2019-08-30T08:04:18.382831966Z", "UpdatedAt": "2019-08-30T08:09:43.613636037Z", "Labels": {}, "Spec": { "ContainerSpec": { "Image": "mysql:latest@sha256:01cf53f2538aa805bda591d83f107c394adca8d31f98eacd3654e282dada3193", "Env": [ "MYSQL_ROOT_PASSWORD=aimind@mysql2019"" ], "Isolation": "default" }, "Resources": { "Limits": {}, "Reservations": {} }, "RestartPolicy": { "Condition": "any", "Delay": 5000000000, "MaxAttempts": 0, "Window": 0 }, "Placement": {}, "ForceUpdate": 0 }, "ServiceID": "uporil7xf4rwffa0rhg1j5htw", "Slot": 1, "NodeID": "sixp62dhqe702b69pm6v8m9rh", "Status": { "Timestamp": "2019-08-30T08:09:43.554514932Z", "State": "running", "Message": "started", "ContainerStatus": { "ContainerID": "2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08", "PID": 14884, "ExitCode": 0 }, "PortStatus": {} }, "DesiredState": "running", "NetworksAttachments": [ { "Network": { "ID": "emypqxzjggws7uicersyz6uag", "Version": { "Index": 12 }, "CreatedAt": "2019-08-30T08:02:57.254494392Z", "UpdatedAt": "2019-08-30T08:02:57.271216394Z", "Spec": { "Name": "aimind-overlay", "Labels": {}, "DriverConfiguration": { "Name": "overlay" }, "IPAMOptions": { "Driver": { "Name": "default" } }, "Scope": "swarm" }, "DriverState": { "Name": "overlay", "Options": { "com.docker.network.driver.overlay.vxlanid_list": "4097" } }, "IPAMOptions": { "Driver": { "Name": "default" }, "Configs": [ { "Subnet": "10.0.0.0/24", "Gateway": "10.0.0.1" } ] } }, "Addresses": [ "10.0.0.4/24" ] } ] } ] 返回的json中，NodeID是所在節點ID，Status.ContainerStatus 是容器的狀態資訊，.Status.ContainerStatus.ContainerID 是容器ID，比如這裡的是2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08。
拿到容器ID就能獲取容器詳情了，也可以獲取container的統計資訊：
docker inspect 2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08 [ { "Id": "2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08", "Created": "2019-08-30T08:09:41.827551223Z", "Path": "docker-entrypoint.sh", "Args": [ "mysqld" ], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 14884, "ExitCode": 0, "Error": "", "StartedAt": "2019-08-30T08:09:43.402630785Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:62a9f311b99c24c0fde0a772abc6030bc48e5acc7d7416b8eeb72d3da1b4eb6c", "ResolvConfPath": "/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/resolv.conf", "HostnamePath": "/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/hostname", "HostsPath": "/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/hosts", "LogPath": "/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08-json.log", "Name": "/mysql.1.lvskmv1lkhz6bvynfuxa0jqgn", "RestartCount": 0, "Driver": "overlay2", "Platform": "linux", "MountLabel": "", "ProcessLabel": "", "AppArmorProfile": "docker-default", "ExecIDs": null, "HostConfig": { "Binds": null, "ContainerIDFile": "", "LogConfig": { "Type": "json-file", "Config": { "max-file": "3", "max-size": "10m" } }, "NetworkMode": "default", "PortBindings": {}, "RestartPolicy": { "Name": "", "MaximumRetryCount": 0 }, "AutoRemove": false, "VolumeDriver": "", "VolumesFrom": null, "CapAdd": null, "CapDrop": null, "Dns": null, "DnsOptions": null, "DnsSearch": null, "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": "default", "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": null, "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, "MaskedPaths": [ "/proc/acpi", "/proc/kcore", "/proc/keys", "/proc/latency_stats", "/proc/timer_list", "/proc/timer_stats", "/proc/sched_debug", "/proc/scsi", "/sys/firmware" ], "ReadonlyPaths": [ "/proc/asound", "/proc/bus", "/proc/fs", "/proc/irq", "/proc/sys", "/proc/sysrq-trigger" ] }, "GraphDriver": { "Data": { "LowerDir": "/data/docker/overlay2/f0184a2c979eef7a135726a49f5651e16b568ecfd47606e20e504e28ea311f25-init/diff:/data/docker/overlay2/644c4c905af78d3320559b9f388631151dcf5c19ab8f2c91999d4d59c8409784/diff:/data/docker/overlay2/7ed834798bd5eeef1b75d012a27bb01cd8a0a5e71048db72a8743980481bb74b/diff:/data/docker/overlay2/56e3eac1c86a9ae29b3251025824f93b78e43151a36eb973407feb1075d8db1c/diff:/data/docker/overlay2/40161cfa334a118eaa09c04dc7d864d00e3544f77e6979584298478f68566bc5/diff:/data/docker/overlay2/e884a3df3e827368a468a4afc8850de4fa6336a78ca9a922406237e3ab75a97e/diff:/data/docker/overlay2/a04e8776674f902eaa0e15467ad0678f03baf2a1b8a568b034ad4b4c1ddb1a23/diff:/data/docker/overlay2/7745739e901232d6b702b599844157583d02a34fa4aca10c888e0e9c44075433/diff:/data/docker/overlay2/f423b8f55475ec902cea1ea5c54897ed6a24da3cc0acd64a79e022e887d83e77/diff:/data/docker/overlay2/231e63e7fbb5084facc93c89ed23d366d915f9a2edd4f85735df5d45bc87cafa/diff:/data/docker/overlay2/c11047327e6f47e49d1abee4df8acbaba51ac6b92e59801ac613331c5bad3bc1/diff:/data/docker/overlay2/f893602043c1b5ad9d2839ec0ab8f17da7e0eaf073788f6c3d35138dfe6c06b8/diff:/data/docker/overlay2/3443517fc9e882df67d9730a9aa7530dc3c541b6872aaf05290c5e7ec588e0fb/diff", "MergedDir": "/data/docker/overlay2/f0184a2c979eef7a135726a49f5651e16b568ecfd47606e20e504e28ea311f25/merged", "UpperDir": "/data/docker/overlay2/f0184a2c979eef7a135726a49f5651e16b568ecfd47606e20e504e28ea311f25/diff", "WorkDir": "/data/docker/overlay2/f0184a2c979eef7a135726a49f5651e16b568ecfd47606e20e504e28ea311f25/work" }, "Name": "overlay2" }, "Mounts": [ { "Type": "volume", "Name": "c2128d05001b8fec1712807f381e2c72d42ce8a83ae97f6b038f51c0d48446f1", "Source": "/data/docker/volumes/c2128d05001b8fec1712807f381e2c72d42ce8a83ae97f6b038f51c0d48446f1/_data", "Destination": "/var/lib/mysql", "Driver": "local", "Mode": "", "RW": true, "Propagation": "" } ], "Config": { "Hostname": "2cf128f77797", "Domainname": "", "User": "", "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "ExposedPorts": { "3306/tcp": {}, "33060/tcp": {} }, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "MYSQL_ROOT_PASSWORD=aimind@mysql2019"", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "GOSU_VERSION=1.7", "MYSQL_MAJOR=8.0", "MYSQL_VERSION=8.0.17-1debian9" ], "Cmd": [ "mysqld" ], "ArgsEscaped": true, "Image": "mysql:latest@sha256:01cf53f2538aa805bda591d83f107c394adca8d31f98eacd3654e282dada3193", "Volumes": { "/var/lib/mysql": {} }, "WorkingDir": "", "Entrypoint": [ "docker-entrypoint.sh" ], "OnBuild": null, "Labels": { "com.docker.swarm.node.id": "sixp62dhqe702b69pm6v8m9rh", "com.docker.swarm.service.id": "uporil7xf4rwffa0rhg1j5htw", "com.docker.swarm.service.name": "mysql", "com.docker.swarm.task": "", "com.docker.swarm.task.id": "lvskmv1lkhz6bvynfuxa0jqgn", "com.docker.swarm.task.name": "mysql.1.lvskmv1lkhz6bvynfuxa0jqgn" } }, "NetworkSettings": { "Bridge": "", "SandboxID": "459ab4b83580513da251182d08dc217d0079613d10952df00ffcca6e2537958b", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": { "3306/tcp": null, "33060/tcp": null }, "SandboxKey": "/var/run/docker/netns/459ab4b83580", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "", "Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "", "IPPrefixLen": 0, "IPv6Gateway": "", "MacAddress": "", "Networks": { "aimind-overlay": { "IPAMConfig": { "IPv4Address": "10.0.0.4" }, "Links": null, "Aliases": [ "2cf128f77797" ], "NetworkID": "emypqxzjggws7uicersyz6uag", "EndpointID": "56a78b2527a6dcf83fd3dc2794c514aaa325457d9c8a21bd236d3ea3c22c8fa9", "Gateway": "", "IPAddress": "10.0.0.4", "IPPrefixLen": 24, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:0a:00:00:04", "DriverOpts": null } } } } ] 然後就可以通過stats來獲取資源佔用情況：
~#docker stats 2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08 --all --no-stream CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS 2cf128f77797 mysql.1.lvskmv1lkhz6bvynfuxa0jqgn 0.33% 374.4MiB / 188.8GiB 0.19% 230kB / 0B 8.19kB / 1.26GB 38coding方式
除了命令行，我們還可以通過docker api來獲取，可以參見 docker-java Docker的java API
獲取containerID
System.out.println(client.listTasksCmd().withNameFilter("mysql").exec());結果：
[class Task { ID: lvskmv1lkhz6bvynfuxa0jqgn version: 21 createdAt: 2019-08-30T08:04:18.382831966Z updatedAt: 2019-08-30T08:09:43.613636037Z name: null labels: {} spec: TaskSpec[containerSpec=ContainerSpec[image=mysql:latest@sha256:01cf53f2538aa805bda591d83f107c394adca8d31f98eacd3654e282dada3193,labels=<null>,command=<null>,args=<null>,env=[MYSQL_ROOT_PASSWORD=aimind@mysql2019"],dir=<null>,user=<null>,groups=<null>,tty=<null>,mounts=<null>,duration=<null>,stopGracePeriod=<null>,dnsConfig=<null>,openStdin=<null>,readOnly=<null>,hosts=<null>,hostname=<null>,secrets=<null>,healthCheck=<null>,stopSignal=<null>,privileges=<null>,configs=<null>],resources=ResourceRequirements[limits=ResourceSpecs[memoryBytes=<null>,nanoCPUs=<null>],reservations=ResourceSpecs[memoryBytes=<null>,nanoCPUs=<null>]],restartPolicy=ServiceRestartPolicy[condition=ANY,delay=5000000000,maxAttempts=0,window=0],placement=ServicePlacement[constraints=<null>,platforms=<null>],logDriver=<null>,forceUpdate=0,networks=<null>,runtime=<null>] serviceId: uporil7xf4rwffa0rhg1j5htw slot: 1 nodeId: sixp62dhqe702b69pm6v8m9rh assignedGenericResources: null status: TaskStatus[timestamp=2019-08-30T08:09:43.554514932Z,state=running,message=started,err=<null>,containerStatus=TaskStatusContainerStatus[containerID=2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08,pid=14884,exitCode=0]] desiredState: running }]可以看到containerID：2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08 和命令行一直。
然後獲取容器詳情：
System.out.println(client.inspectContainerCmd("2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08").exec());獲取容器統計資訊：
System.out.println(client.statsCmd("2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08").exec(new InvocationBuilder.AsyncResultCallback<>()).awaitResult()); 對應的結果：
InspectContainerResponse[args={mysqld},config=com.github.dockerjava.api.model.ContainerConfig@3e15bb06[attachStderr=false,attachStdin=false,attachStdout=false,cmd={mysqld},domainName=,entrypoint={docker-entrypoint.sh},env={MYSQL_ROOT_PASSWORD=aimind@mysql2019",PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin,GOSU_VERSION=1.7,MYSQL_MAJOR=8.0,MYSQL_VERSION=8.0.17-1debian9},exposedPorts=com.github.dockerjava.api.model.ExposedPorts@6778aea6,hostName=2cf128f77797,image=mysql:latest@sha256:01cf53f2538aa805bda591d83f107c394adca8d31f98eacd3654e282dada3193,labels={com.docker.swarm.node.id=sixp62dhqe702b69pm6v8m9rh, com.docker.swarm.service.id=uporil7xf4rwffa0rhg1j5htw, com.docker.swarm.service.name=mysql, com.docker.swarm.task=, com.docker.swarm.task.id=lvskmv1lkhz6bvynfuxa0jqgn, com.docker.swarm.task.name=mysql.1.lvskmv1lkhz6bvynfuxa0jqgn},macAddress=<null>,networkDisabled=<null>,onBuild=<null>,stdinOpen=false,portSpecs=<null>,stdInOnce=false,tty=false,user=,volumes={/var/lib/mysql={}},workingDir=,healthCheck=<null>],created=2019-08-30T08:09:41.827551223Z,driver=overlay2,execDriver=<null>,hostConfig=com.github.dockerjava.api.model.HostConfig@5853495b[binds=<null>,blkioWeight=0,blkioWeightDevice=<null>,blkioDeviceReadBps=<null>,blkioDeviceWriteBps=<null>,blkioDeviceReadIOps=<null>,blkioDeviceWriteIOps=<null>,memorySwappiness=<null>,nanoCPUs=<null>,capAdd=<null>,capDrop=<null>,containerIDFile=,cpuPeriod=0,cpuRealtimePeriod=0,cpuRealtimeRuntime=0,cpuShares=0,cpuQuota=0,cpusetCpus=,cpusetMems=,devices=<null>,deviceCgroupRules=<null>,diskQuota=0,dns=<null>,dnsOptions=<null>,dnsSearch=<null>,extraHosts=<null>,groupAdd=<null>,ipcMode=shareable,cgroup=,links=<null>,logConfig=com.github.dockerjava.api.model.LogConfig@524a2ffb,lxcConf=<null>,memory=0,memorySwap=0,memoryReservation=0,kernelMemory=0,networkMode=default,oomKillDisable=false,init=<null>,autoRemove=false,oomScoreAdj=0,portBindings={},privileged=false,publishAllPorts=false,readonlyRootfs=false,restartPolicy=no,ulimits=<null>,cpuCount=0,cpuPercent=0,ioMaximumIOps=0,ioMaximumBandwidth=0,volumesFrom=<null>,mounts=<null>,pidMode=,isolation=default,securityOpts=<null>,storageOpt=<null>,cgroupParent=,volumeDriver=,shmSize=67108864,pidsLimit=0,runtime=runc,tmpFs=<null>,utSMode=,usernsMode=,sysctls=<null>,consoleSize=[0, 0]],hostnamePath=/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/hostname,hostsPath=/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/hosts,logPath=/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08-json.log,id=2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08,sizeRootFs=<null>,imageId=sha256:62a9f311b99c24c0fde0a772abc6030bc48e5acc7d7416b8eeb72d3da1b4eb6c,mountLabel=,name=/mysql.1.lvskmv1lkhz6bvynfuxa0jqgn,restartCount=0,networkSettings=com.github.dockerjava.api.model.NetworkSettings@7173ae5b[bridge=,sandboxId=459ab4b83580513da251182d08dc217d0079613d10952df00ffcca6e2537958b,hairpinMode=false,linkLocalIPv6Address=,linkLocalIPv6PrefixLen=0,ports={3306/tcp=null, 33060/tcp=null},sandboxKey=/var/run/docker/netns/459ab4b83580,secondaryIPAddresses=<null>,secondaryIPv6Addresses=<null>,endpointID=,gateway=,portMapping=<null>,globalIPv6Address=,globalIPv6PrefixLen=0,ipAddress=,ipPrefixLen=0,ipV6Gateway=,macAddress=,networks={aimind-overlay=com.github.dockerjava.api.model.ContainerNetwork@53a9fcfd[ipamConfig=com.github.dockerjava.api.model.ContainerNetwork$Ipam@21f459fc,links=<null>,aliases=[2cf128f77797],networkID=emypqxzjggws7uicersyz6uag,endpointId=56a78b2527a6dcf83fd3dc2794c514aaa325457d9c8a21bd236d3ea3c22c8fa9,gateway=,ipAddress=10.0.0.4,ipPrefixLen=24,ipV6Gateway=,globalIPv6Address=,globalIPv6PrefixLen=0,macAddress=02:42:0a:00:00:04]}],path=docker-entrypoint.sh,processLabel=,resolvConfPath=/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/resolv.conf,execIds=<null>,state=com.github.dockerjava.api.command.InspectContainerResponse$ContainerState@4d192aef[status=running,running=true,paused=false,restarting=false,oomKilled=false,dead=false,pid=14884,exitCode=0,error=,startedAt=2019-08-30T08:09:43.402630785Z,finishedAt=0001-01-01T00:00:00Z,health=<null>],volumes=<null>,volumesRW=<null>,node=<null>,mounts=[com.github.dockerjava.api.command.InspectContainerResponse$Mount@1416cf9f[name=c2128d05001b8fec1712807f381e2c72d42ce8a83ae97f6b038f51c0d48446f1,source=/data/docker/volumes/c2128d05001b8fec1712807f381e2c72d42ce8a83ae97f6b038f51c0d48446f1/_data,destination=/var/lib/mysql,driver=local,mode=,rw=true]],graphDriver=com.github.dockerjava.api.command.GraphDriver@84487f4[name=overlay2,data=com.github.dockerjava.api.command.GraphData@bfc14b9[rootDir=<null>,deviceId=<null>,deviceName=<null>,deviceSize=<null>,dir=<null>]],platform=linux] Disconnected from the target VM, address: '127.0.0.1:60730', transport: 'socket' com.github.dockerjava.api.model.Statistics@55a88417[read=2019-09-02T12:20:14.534216408Z,networks={eth0=com.github.dockerjava.api.model.StatisticNetworksConfig@18acfe88[rxBytes=0,rxDropped=0,rxErrors=0,rxPackets=0,txBytes=0,txDropped=0,txErrors=0,txPackets=0], eth1=com.github.dockerjava.api.model.StatisticNetworksConfig@8a2a6a[rxBytes=197752,rxDropped=0,rxErrors=0,rxPackets=836,txBytes=0,txDropped=0,txErrors=0,txPackets=0]},network=<null>,memoryStats=com.github.dockerjava.api.model.MemoryStatsConfig@772861aa,blkioStats=BlkioStatsConfig[ioServiceBytesRecursive=[BlkioStatEntry[major=8,minor=0,op=Read,value=8192], BlkioStatEntry[major=8,minor=0,op=Write,value=1259921408], BlkioStatEntry[major=8,minor=0,op=Sync,value=1258987520], BlkioStatEntry[major=8,minor=0,op=Async,value=942080], BlkioStatEntry[major=8,minor=0,op=Total,value=1259929600]],ioServicedRecursive=[BlkioStatEntry[major=8,minor=0,op=Read,value=2], BlkioStatEntry[major=8,minor=0,op=Write,value=4066], BlkioStatEntry[major=8,minor=0,op=Sync,value=4009], BlkioStatEntry[major=8,minor=0,op=Async,value=59], BlkioStatEntry[major=8,minor=0,op=Total,value=4068]],ioQueueRecursive=[],ioServiceTimeRecursive=[],ioWaitTimeRecursive=[],ioMergedRecursive=[],ioTimeRecursive=[],sectorsRecursive=[]],cpuStats=com.github.dockerjava.api.model.CpuStatsConfig@4cb40e3b,preCpuStats=com.github.dockerjava.api.model.CpuStatsConfig@41b1f51e,pidsStats=com.github.dockerjava.api.model.PidsStatsConfig@3a543f31]作者：Jadepeng
出處：jqpeng的技術記事本–http://www.cnblogs.com/xiaoqi
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