Kubernetes Create Job from Cronjob not working

Question

I have a Kubernetes cluster with following versions:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.1", GitCommit:"632ed300f2c34f6d6d15ca4cef3d3c7073412212", GitTreeState:"clean", BuildDate:"2021-08-19T15:38:26Z", GoVersion:"go1.16.6", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.13", GitCommit:"aac5f64a5218b0b1d0138a57d273a12db99390c9", GitTreeState:"clean", BuildDate:"2021-01-18T07:43:30Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
WARNING: version difference between client (1.22) and server (1.16) exceeds the supported minor version skew of +/-1

I have a cron job in my Kubernetes cluster.

apiVersion: batch/v1beta1
kind: CronJob
metadata:
   name: abc-cronjob
   namespace: abc-namespace
...

The Kubernetes cluster recognizes the api resource for the cron job.

$ kubernetes -n abc-namespace api-resources
NAME                              SHORTNAMES   APIVERSION                        NAMESPACED   KIND
...
cronjobs                          cj           batch/v1beta1                     true         CronJob
...

I am trying to create a manual job for this, but am facing this error.

$ kubernetes -n abc-namespace create job abc-job --from=cronjob/abc-cronjob
error: unknown object type *v1beta1.CronJob

Can anyone help in this?

Answer 1

Got the issue now. The version difference was causing the main problem. Installed the version matching the one in server side and ran the query again without issues.

Answer 2

downgrade client side "kubectl" to v1.16 or upgrade server side k8s cluster to v1.22

Answer 3

The API version which you are using(batch/v1beta1) for CronJob is not longer valid. Try using below apiVersion for the CronJob.

apiVersion: batch/v1