一次性任务和定时任务

太过爱你忘了你带给我的痛 2022-10-17 04:15 77阅读 0赞

# 一次性任务： #

创建资源编排文件 job.yaml

[root@k8smaster ~]# cat job.yaml
    apiVersion: batch/v1
    kind: Job
    metadata:
      name: pi
    spec:
      template:
        spec:
          containers:
          - name: pi
            image: perl
            command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]
          restartPolicy: Never
      backoffLimit: 4

运行任务

# 创建job
    [root@k8smaster ~]# kubectl apply -f job.yaml
    Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
    job.batch/pi configured
    
    # 查询job
    [root@k8smaster ~]# kubectl get jobs
    NAME   COMPLETIONS   DURATION   AGE
    pi     1/1           5m42s      95m
    
    # 查询pods
    [root@k8smaster ~]# kubectl get pods
    NAME                  READY   STATUS      RESTARTS   AGE
    ds-test-2fw6j         1/1     Running     0          90m
    nginx-statefulset-0   1/1     Running     0          3h15m
    nginx-statefulset-1   1/1     Running     0          3h15m
    nginx-statefulset-2   1/1     Running     0          3h15m
    pi-dl7c9              0/1     Completed   0          95m
    
    # 查询日志
    [root@k8smaster ~]# kubectl logs pi-dl7c9
    3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989380952572010654858632788659361533818279682303019520353018529689957736225994138912497217752834791315155748572424541506959508295331168617278558890750983817546374649393192550604009277016711390098488240128583616035637076601047101819429555961989467678374494482553797747268471040475346462080466842590694912933136770289891521047521620569660240580381501935112533824300355876402474964732639141992726042699227967823547816360093417216412199245863150302861829745557067498385054945885869269956909272107975093029553211653449872027559602364806654991198818347977535663698074265425278625518184175746728909777727938000816470600161452491921732172147723501414419735685481613611573525521334757418494684385233239073941433345477624168625189835694855620992192221842725502542568876717904946016534668049886272327917860857843838279679766814541009538837863609506800642251252051173929848960841284886269456042419652850222106611863067442786220391949450471237137869609563643719172874677646575739624138908658326459958133904780275901

定时任务：

资源编排文件

apiVersion: batch/v1beta1
    kind: CronJob
    metadata:
      name: hello
    spec:
      schedule: "*/1 * * * *"
      jobTemplate:
        spec:
          template:
            spec:
              containers:
              - name: hello
                image: busybox
                args:
                - /bin/sh
                - -c
                - date; echo Hello from the Kubernetes cluster
              restartPolicy: OnFailure

运行任务

# 创建pod
    [root@k8smaster ~]# kubectl apply -f cronjob.yaml
    
    # 定时生成hello开头的pod 
    [root@k8smaster ~]# kubectl get pods
    NAME                     READY   STATUS      RESTARTS   AGE
    ds-test-2fw6j            1/1     Running     0          107m
    hello-1622075940-ss8b8   0/1     Completed   0          2m45s
    hello-1622076000-4h75t   0/1     Completed   0          105s
    hello-1622076060-s7czk   0/1     Completed   0          45s
    nginx-statefulset-0      1/1     Running     0          3h33m
    nginx-statefulset-1      1/1     Running     0          3h32m
    nginx-statefulset-2      1/1     Running     0          3h32m
    pi-dl7c9                 0/1     Completed   0          113m
    
    # 查看一个hello pod的日志
    [root@k8smaster ~]# kubectl logs hello-1622076000-4h75t
    Thu May 27 00:39:33 UTC 2021
    Hello from the Kubernetes cluster