Running containers one-time or periodic in Kubernetes





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How to deploy and run a container in Kubernetes, that should do his job and terminate?



I thought this is what Run-Once is for, but it looks like it's not supported to work.



I have some jobs, packed in docker images, that should be run either once/on demand (data import), where the config change should trigger re-run, or periodically (like volume backup). My idea was to deploy a container with restartPolicy: never which would stop and scale up to null after accomplishing.



What alternatives do I have for this missing functionality?










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  • 1





    What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

    – Clorichel
    Nov 22 '18 at 17:05


















0















How to deploy and run a container in Kubernetes, that should do his job and terminate?



I thought this is what Run-Once is for, but it looks like it's not supported to work.



I have some jobs, packed in docker images, that should be run either once/on demand (data import), where the config change should trigger re-run, or periodically (like volume backup). My idea was to deploy a container with restartPolicy: never which would stop and scale up to null after accomplishing.



What alternatives do I have for this missing functionality?










share|improve this question


















  • 1





    What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

    – Clorichel
    Nov 22 '18 at 17:05














0












0








0








How to deploy and run a container in Kubernetes, that should do his job and terminate?



I thought this is what Run-Once is for, but it looks like it's not supported to work.



I have some jobs, packed in docker images, that should be run either once/on demand (data import), where the config change should trigger re-run, or periodically (like volume backup). My idea was to deploy a container with restartPolicy: never which would stop and scale up to null after accomplishing.



What alternatives do I have for this missing functionality?










share|improve this question














How to deploy and run a container in Kubernetes, that should do his job and terminate?



I thought this is what Run-Once is for, but it looks like it's not supported to work.



I have some jobs, packed in docker images, that should be run either once/on demand (data import), where the config change should trigger re-run, or periodically (like volume backup). My idea was to deploy a container with restartPolicy: never which would stop and scale up to null after accomplishing.



What alternatives do I have for this missing functionality?







kubernetes






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asked Nov 22 '18 at 14:16









9ilsdx 9rvj 0lo9ilsdx 9rvj 0lo

1,26511231




1,26511231








  • 1





    What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

    – Clorichel
    Nov 22 '18 at 17:05














  • 1





    What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

    – Clorichel
    Nov 22 '18 at 17:05








1




1





What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

– Clorichel
Nov 22 '18 at 17:05





What exact functionality is missing? Isn't kubernetes.io/docs/concepts/workloads/controllers/… what you are looking for?

– Clorichel
Nov 22 '18 at 17:05












2 Answers
2






active

oldest

votes


















1














If you waht a task to be executed just once, or just when you want, you should define a job.
From the oficial documentation you can see this example:



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


If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:



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





share|improve this answer































    1














    You can use a job/cronjob. This example is from kubernetes docs:



    apiVersion: batch/v1
    kind: Job
    metadata:
    name: pi
    spec:
    backoffLimit: 5
    activeDeadlineSeconds: 100
    template:
    spec:
    containers:
    - name: pi
    image: perl
    command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
    restartPolicy: Never


    So, it will calculate "pi" and will terminate






    share|improve this answer
























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      2 Answers
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      2 Answers
      2






      active

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      active

      oldest

      votes






      active

      oldest

      votes









      1














      If you waht a task to be executed just once, or just when you want, you should define a job.
      From the oficial documentation you can see this example:



      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


      If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:



      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





      share|improve this answer




























        1














        If you waht a task to be executed just once, or just when you want, you should define a job.
        From the oficial documentation you can see this example:



        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


        If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:



        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





        share|improve this answer


























          1












          1








          1







          If you waht a task to be executed just once, or just when you want, you should define a job.
          From the oficial documentation you can see this example:



          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


          If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:



          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





          share|improve this answer













          If you waht a task to be executed just once, or just when you want, you should define a job.
          From the oficial documentation you can see this example:



          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


          If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:



          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






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 22 '18 at 16:36









          Pau Campaña SolerPau Campaña Soler

          1688




          1688

























              1














              You can use a job/cronjob. This example is from kubernetes docs:



              apiVersion: batch/v1
              kind: Job
              metadata:
              name: pi
              spec:
              backoffLimit: 5
              activeDeadlineSeconds: 100
              template:
              spec:
              containers:
              - name: pi
              image: perl
              command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
              restartPolicy: Never


              So, it will calculate "pi" and will terminate






              share|improve this answer




























                1














                You can use a job/cronjob. This example is from kubernetes docs:



                apiVersion: batch/v1
                kind: Job
                metadata:
                name: pi
                spec:
                backoffLimit: 5
                activeDeadlineSeconds: 100
                template:
                spec:
                containers:
                - name: pi
                image: perl
                command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
                restartPolicy: Never


                So, it will calculate "pi" and will terminate






                share|improve this answer


























                  1












                  1








                  1







                  You can use a job/cronjob. This example is from kubernetes docs:



                  apiVersion: batch/v1
                  kind: Job
                  metadata:
                  name: pi
                  spec:
                  backoffLimit: 5
                  activeDeadlineSeconds: 100
                  template:
                  spec:
                  containers:
                  - name: pi
                  image: perl
                  command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
                  restartPolicy: Never


                  So, it will calculate "pi" and will terminate






                  share|improve this answer













                  You can use a job/cronjob. This example is from kubernetes docs:



                  apiVersion: batch/v1
                  kind: Job
                  metadata:
                  name: pi
                  spec:
                  backoffLimit: 5
                  activeDeadlineSeconds: 100
                  template:
                  spec:
                  containers:
                  - name: pi
                  image: perl
                  command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
                  restartPolicy: Never


                  So, it will calculate "pi" and will terminate







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 22 '18 at 15:34









                  surensuren

                  1,585617




                  1,585617






























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