How can I trigger a Kubernetes Scheduled Job manua

Question

I've created a Kubernetes Scheduled Job, which runs twice a day according to its schedule. However, I would like to trigger it manually for testing purposes. How can I do this?

Answer 1

EDIT - July 2018: see @pedro_sland's answer as this feature has now been implemented

My original answer below will remain correct for older versions of kubectl less than v1.10.1

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Aside from creating a new job (as the other answers have suggested), there is no current way to do this. It is a feature request in with kubernetes now that can be tracked here: https://github.com/kubernetes/kubernetes/issues/47538

Answer 2

The issue #47538 that @jdf mentioned is now closed and this is now possible. The original implementation can be found here but the syntax has changed.

With kubectl v1.10.1+ the command is:

kubectl create job --from=cronjob/<cronjob-name> <job-name>

It seems to be backwardly compatible with older clusters as it worked for me on v0.8.x.

Answer 3

I've created a small cmd utility for convenience to do just that and also suspend and unsuspend cronjobs.

https://github.com/iJanki/kubecron

Answer 4

Unfortunately, none of the example syntax above works in Google Kubernetes Engine (GCP). Also, the GKE docs themselves are wrong. :(

In Kubernetes 1.10.6.gke-2, the working syntax is

kubectl create job <your-new-job-name> --from=cronjob/<name-of-deployed-cron-job> -n <target namespace>

Answer 5

You can create a simple job based on your ScheduledJob. If you already run a ScheduledJob, there are jobs in history.

kubectl get jobs

NAME               DESIRED   SUCCESSFUL   AGE
hello-1477281595   1         1            11m
hello-1553106750   1         1            12m
hello-1553237822   1         1            9m

Export one of these jobs:

kubectl get job hello-1477281595 -o yaml > my_job.yaml

Then edit the yaml a little bit, erasing some unnecessary fields and run it manually:

kubectl create -f my_job.yaml
kubectl delete -f my_job.yaml

Answer 6

If you want to test the job, create a Job config from your Cron Job (ScheduledJob) config and run it manually using the following command:

kubectl create -f ./job.yaml