I run my django unit tests in my cluster with helm command. They are correctly launched, but when the unit tests fail, kubernetes keeps restarting them again and again, despite "restartPolicy: Never".
How can I force kubernetes/helm to run my unit tests only once, failed or not?
django-test.yml:
apiVersion: batch/v1
kind: Job
metadata:
name: "{{ .Release.Name }}-django-test"
labels:
app: {{ template "myproject.fullname" . }}
chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
release: "{{ .Release.Name }}"
annotations:
"helm.sh/hook": test
spec:
template:
metadata:
name: "{{ .Release.Name }}-django-test"
spec:
containers:
- name: main
image: {{ template "myproject.django.image" . }}
args:
- test
restartPolicy: Never
➜ ~ kubectl get pods --namespace mynamespace
NAME READY STATUS RESTARTS AGE
myrel-django-install-jhspp 0/1 Completed 0 78m
myrel-django-test-6dzrq 0/1 Error 0 47m
myrel-django-test-7hpwm 0/1 Error 0 67m
myrel-django-test-nd74f 0/1 Error 0 73m
myrel-django-test-np5qd 0/1 Error 0 39m
myrel-django-test-nqjdw 0/1 Error 0 60m
myrel-django-test-tjbhc 0/1 Error 0 53m
...
Have a look at backoffLimit option.
Pod backoff failure policy
There are situations where you want to fail a Job after some amount of retries due to a logical error in configuration etc. To do so, set .spec.backoffLimit to specify the number of retries before considering a Job as failed. The back-off limit is set by default to 6.
I have not tried this, but I believe it will get you the behaviour you want.
spec:
containers:
- name: main
image: {{ template "myproject.django.image" . }}
args:
- test
backoffLimit: 1
restartPolicy: NeverYou may also find the following post useful: Understanding backoffLimit in Kubernetes Job