The activeDeadlineSeconds property on a Pod definition

3 min read

If we take a look all the possible properties for a Pod definition we might notice that there's one to limit the time a Pod can be running:

apiVersion: v1
kind: Pod
metadata:
  name: test
spec:
  activeDeadlineSeconds: 10
  containers:
  - args:
    - sleep
    - 24h
    image: alpine
    name: test

07/03/2022

What's a Kubernetes Job?

2 min read

A Kubernetes Job is an object that contains a Pod definition, just as a Deployment do, but instead of expecting the Pod to be continuously running, it is expecting it to finish. In case the Pod execution fails, it will continue to retry execution until a specified number of them successfully terminate.

05/08/2021

How to trigger a Kubernetes cronjob

2 min read

If you deploy a Cronjob on Kubernetes it can be useful to test it out by manually triggering a run rather than to wait until it is run according by it's schedule.

Let's assume we have the following Cronjob that we want to run:

$ kubectl get cronjob
NAME                    SCHEDULE    SUSPEND   ACTIVE   LAST SCHEDULE   AGE
pet2cattle-sitemapgen   0 5 * * *   False     0        <none>          13m

21/01/2021

Create a cronjob on a kubernetes cluster

3 min read

The cronjob object haven't been GA until Kubernetes v1.21, even though the Job object have been GA for a long time. Let's take a look how it works:

$ kubectl create job demo --image nginx --dry-run=client -o yaml  | head -n1
apiVersion: batch/v1
$ kubectl create cronjob demo --image nginx --schedule="*/1 * * * *" -o yaml --dry-run=client | head -n1
apiVersion: batch/v1beta1

20/01/2021