院长手把手教学---Job实验

院长技术

发布于 2020-12-02 10:02:42

5170

发布于 2020-12-02 10:02:42

文章被收录于专栏：院长运维开发

创建资源清单

[root@k8s-master ~]# vim job.yaml

apiVersion: batch/v1
kind: Job
metadata:
  name: pi
spec:
  template:
    metadata:
      name: pi
    spec:
      containers:
        - name: pi
          image: perl
          imagePullPolicy: IfNotPresent
          #计算兀后边的2000位
          command: ["perl","-Mbignum=bpi","-wle","print bpi(2000)"]
      restartPolicy: Never

创建Pod资源

[root@k8s-master ~]# kubectl create -f job.yaml

job.batch/pi created

查看Pod信息，发现正常创建中

[root@k8s-master ~]# kubectl get pods

NAME                                READY   STATUS              RESTARTS   AGE
pi-r5g58                            0/1     ContainerCreating   0          4s

我们可以查看Pod的详细描述信息，发现正在下载镜像，因镜像比较大

root@k8s-master ~]# kubectl describe pods pi-r5g58

Name:           pi-r5g58
Namespace:      default
Priority:       0
Node:           k8s-node3/42.51.227.116
Start Time:     Tue, 01 Dec 2020 02:12:59 +0000
Labels:         controller-uid=d6961b8c-4f5e-4e84-87a8-1aca15d8aa2f
                job-name=pi
Annotations:    <none>
Status:         Pending
IP:             
IPs:            <none>
Controlled By:  Job/pi
Containers:
  pi:
    Container ID:  
    Image:         perl
    Image ID:      
    Port:          <none>
    Host Port:     <none>
    Command:
      perl
      -Mbignum=bpi
      -wle
      print bpi(2000)
    State:          Waiting
      Reason:       ContainerCreating
    Ready:          False
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-hvlcv (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             False 
  ContainersReady   False 
  PodScheduled      True 
Volumes:
  default-token-hvlcv:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-hvlcv
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type    Reason     Age        From                Message

  Normal  Scheduled  <unknown>  default-scheduler   Successfully assigned default/pi-r5g58 to k8s-node3
  Normal  Pulling    14s        kubelet, k8s-node3  Pulling image "perl"

查看Job，发现需要完成的是1，已完成的是0

[root@k8s-master ~]# kubectl get job

NAME   COMPLETIONS   DURATION   AGE
pi     0/1           25s        25s

稍等一段时间再次查看

查看Pod资源，Pod的状态已经由Running状态完成（Completed）状态了，因为里面的命令已经执行完毕了

[root@k8s-master ~]# kubectl get pods

NAME                                READY   STATUS      RESTARTS   AGE
pi-r5g58                            0/1     Completed   0          11m

再次查看Pod的详细描述信息，已经下载镜像成功，创建和启动Pod里的容器成功

[root@k8s-master ~]# kubectl describe pods pi-r5g58

Name:         pi-r5g58
Namespace:    default
Priority:     0
Node:         k8s-node3/42.51.227.116
Start Time:   Tue, 01 Dec 2020 02:12:59 +0000
Labels:       controller-uid=d6961b8c-4f5e-4e84-87a8-1aca15d8aa2f
              job-name=pi
Annotations:  <none>
Status:       Succeeded
IP:           10.244.2.147
IPs:
  IP:           10.244.2.147
Controlled By:  Job/pi
Containers:
  pi:
    Container ID:  docker://d08806096bb512f778bc89746e703760368d22bf0d5c0647d9a107c2c134593f
    Image:         perl
    Image ID:      docker-pullable://perl@sha256:a356b3eb17ff9e584f3d56c0dcaa619e5ab29c96533fadaf4581183737e2f0f7
    Port:          <none>
    Host Port:     <none>
    Command:
      perl
      -Mbignum=bpi
      -wle
      print bpi(2000)
    State:          Terminated
      Reason:       Completed
      Exit Code:    0
      Started:      Tue, 01 Dec 2020 02:14:18 +0000
      Finished:     Tue, 01 Dec 2020 02:14:25 +0000
    Ready:          False
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-hvlcv (ro)
Conditions:
  Type              Status
  Initialized       True 
  Ready             False 
  ContainersReady   False 
  PodScheduled      True 
Volumes:
  default-token-hvlcv:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-hvlcv
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type    Reason     Age        From                Message

  Normal  Scheduled  <unknown>  default-scheduler   Successfully assigned default/pi-r5g58 to k8s-node3
  Normal  Pulling    3m27s      kubelet, k8s-node3  Pulling image "perl"
  Normal  Pulled     2m10s      kubelet, k8s-node3  Successfully pulled image "perl"
  Normal  Created    2m9s       kubelet, k8s-node3  Created container pi
  Normal  Started    2m9s       kubelet, k8s-node3  Started container pi

再次查看Job，发现完成的已经是1了

[root@k8s-master ~]# kubectl get job

NAME   COMPLETIONS   DURATION   AGE
pi     1/1           86s        13m

查看Pod的日志，可以查看到兀的2000位

[root@k8s-master ~]# kubectl logs pi-r5g58

3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989380952572010654858632788659361533818279682303019520353018529689957736225994138912497217752834791315155748572424541506959508295331168617278558890750983817546374649393192550604009277016711390098488240128583616035637076601047101819429555961989467678374494482553797747268471040475346462080466842590694912933136770289891521047521620569660240580381501935112533824300355876402474964732639141992726042699227967823547816360093417216412199245863150302861829745557067498385054945885869269956909272107975093029553211653449872027559602364806654991198818347977535663698074265425278625518184175746728909777727938000816470600161452491921732172147723501414419735685481613611573525521334757418494684385233239073941433345477624168625189835694855620992192221842725502542568876717904946016534668049886272327917860857843838279679766814541009538837863609506800642251252051173929848960841284886269456042419652850222106611863067442786220391949450471237137869609563643719172874677646575739624138908658326459958133904780275901

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院长手把手教学---Job实验

院长手把手教学---Job实验

创建资源清单

创建Pod资源

查看Pod信息，发现正常创建中

我们可以查看Pod的详细描述信息，发现正在下载镜像，因镜像比较大

查看Job，发现需要完成的是1，已完成的是0

稍等一段时间再次查看

查看Pod资源，Pod的状态已经由Running状态完成（Completed）状态了，因为里面的命令已经执行完毕了

再次查看Pod的详细描述信息，已经下载镜像成功，创建和启动Pod里的容器成功

再次查看Job，发现完成的已经是1了

查看Pod的日志，可以查看到兀的2000位

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