Docker swarm 获取service的container信息

我们可以通过docker service create创建服务，例如：

docker service create --name mysql mysql:latest

服务创建好后，如何来获取该service包含的容器信息呢？比如获取刚才创建的mysql服务的容器。我们可以通过docker service ps命令来获取，

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 

遗憾的是返回的数据不包含containerId，只有serviceId,可以通过docker inspect来获取service详情

~# 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","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是所在节点ID，Status.ContainerStatus 是容器的状态信息，.Status.ContainerStatus.ContainerID 是容器ID，比如这里的是2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08。

拿到容器ID就能获取容器详情了，也可以获取container的统计信息：

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"
                    },"Aliases": [
                        "2cf128f77797"
                    ],"NetworkID": "emypqxzjggws7uicersyz6uag","EndpointID": "56a78b2527a6dcf83fd3dc2794c514aaa325457d9c8a21bd236d3ea3c22c8fa9","IPAddress": "10.0.0.4","IPPrefixLen": 24,"MacAddress": "02:42:0a:00:00:04","DriverOpts": null
                }
            }
        }
    }
]

然后就可以通过stats来获取资源占用情况：

~#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     38

coding方式

除了命令行，我们还可以通过docker api来获取，可以参见 docker-java Docker的java API

获取containerID

System.out.println(client.listTasksCmd().withNameFilter("mysql").exec());

结果：

[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。

然后获取容器详情：

 System.out.println(client.inspectContainerCmd("2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08").exec());

获取容器统计信息：

        System.out.println(client.statsCmd("2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08").exec(new InvocationBuilder.AsyncResultCallback<>()).awaitResult());

对应的结果：

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>,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$Ipam@21f459fc,aliases=[2cf128f77797],networkID=emypqxzjggws7uicersyz6uag,endpointId=56a78b2527a6dcf83fd3dc2794c514aaa325457d9c8a21bd236d3ea3c22c8fa9,ipAddress=10.0.0.4,ipPrefixLen=24,macAddress=02:42:0a:00:00:04]}],path=docker-entrypoint.sh,processLabel=,resolvConfPath=/data/docker/containers/2cf128f77797f08419f50a057973388f15753efb16134ed05370ded495d0ac08/resolv.conf,execIds=<null>,state=com.github.dockerjava.api.command.InspectContainerResponse$ContainerState@4d192aef[status=running,running=true,paused=false,restarting=false,oomKilled=false,dead=false,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,rxPackets=836,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,op=Write,value=1259921408],op=Sync,value=1258987520],op=Async,value=942080],op=Total,value=1259929600]],ioServicedRecursive=[BlkioStatEntry[major=8,value=2],value=4066],value=4009],value=59],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
出处：jqpeng的技术记事本--http://www.cnblogs.com/xiaoqi
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