some planning and issue finding

deploy/templates/cronjob-backup.yaml

@@ -7,12 +7,22 @@ metadata:
     {{- include "tutortool.labels" . | nindent 4 }}
 spec:
   schedule: "0 3 * * *"
+  concurrencyPolicy: Forbid
   successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
   jobTemplate:
     spec:
+      activeDeadlineSeconds: 900
       template:
         spec:
           restartPolicy: OnFailure
+          affinity:
+            podAffinity:
+              requiredDuringSchedulingIgnoredDuringExecution:
+                - labelSelector:
+                    matchLabels:
+                      {{- include "tutortool.selectorLabels" . | nindent 22 }}
+                  topologyKey: kubernetes.io/hostname
           containers:
             - name: backup
               image: alpine:latest