kubernetes - 设置并发 Kubernetes Cronjob

Question

这是一个非常基本的问题，我似乎无法找到答案，但我无法弄清楚如何在 cronjob 中设置 concurrencyPolicy。我尝试了当前文件配置的变体:

apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: job-newspaper
spec:
  schedule: "* */3 * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
           - name: job-newspaper
            image: bdsdev.azurecr.io/job-newspaper:latest
            imagePullPolicy: Always
            resources:
              limits:
                cpu: "2048m"
                memory: "10G"
              requests:
                cpu: "512m"
                memory: "2G"
            command: ["spark-submit","/app/newspaper_job.py"]
          restartPolicy: OnFailure
          concurrencyPolicy: Forbid

当我跑 kubectl create -f ./job.yaml我收到以下错误:

error: error validating "./job.yaml": error validating data: 
ValidationError(CronJob.spec.jobTemplate.spec.template.spec): unknown 
field "concurrencyPolicy" in io.k8s.api.core.v1.PodSpec; if you choose 
to ignore these errors, turn validation off with --validate=false

我可能将此属性放在错误的位置或调用了错误的名称，我只是在文档中找不到它。谢谢!

Answer 1

属性(property)concurrencyPolicy是 CronJob 规范的一部分，而不是 PodSpec。您可以使用 kubectl explain 在本地查看给定对象的规范。 ， 喜欢

kubectl explain --api-version="batch/v1beta1" cronjobs.spec

在那里你可以看到 CronJob 对象的结构/规范，在你的情况下应该是

apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: job-newspaper
spec:
  schedule: "* */3 * * *"
  concurrencyPolicy: Forbid
  jobTemplate:
    spec:
      template:
        spec:
          containers:
           - name: job-newspaper
            image: bdsdev.azurecr.io/job-newspaper:latest
            imagePullPolicy: Always
            resources:
              limits:
                cpu: "2048m"
                memory: "10G"
              requests:
                cpu: "512m"
                memory: "2G"
            command: ["spark-submit","/app/newspaper_job.py"]
          restartPolicy: OnFailure