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?
What does * mean in Cron? The asterisk * is used as a wildcard in Cron. * sets the execution of a task to any minute, hour, day, weekday, or month.
When a CronJob resource is created, what Kubernetes actually does is to register a schedule. Every 10 seconds the CronJob Controller checks if there are matching schedules to take care of. When the proper time arrives a new Job resource is created to handle the task for that specific run.
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.
downgrade client side "kubectl" to v1.16 or upgrade server side k8s cluster to v1.22
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
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