feat: Define cron jobs running mgmt commands in Helm chart (#440)

* feat: Define cron jobs running mgmt commands in Helm chart

* chore: Use UTC for cron jobs

* chore: Prevent cron jobs from overlapping

* chore: Disable retries on failed jobs

helm/templates/cronjob.yaml

@@ -0,0 +1,42 @@
+{{- range .Values.cronjob.crons }}
+---
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: {{ .name | quote }}
+spec:
+  schedule: {{ .schedule | quote }}
+  timeZone: {{ .timeZone | quote }}
+  concurrencyPolicy: Forbid
+  jobTemplate:
+    spec:
+      backoffLimit: 0 # No retries
+      template:
+        spec:
+          restartPolicy: Never
+          volumes:
+            - name: settings-local-volume
+              configMap:
+                name: django-configmap
+          containers:
+          - name: {{ .name | quote }}
+            image: "{{ .image.repository }}:{{ default $.Chart.AppVersion .image.tag }}"
+            imagePullPolicy: {{ .image.pullPolicy }}
+            volumeMounts:
+            - name: settings-local-volume
+              mountPath: /app/ietf/settings/local.py
+              subPath: local.py
+              readOnly: true
+            {{- if $.Values.env }}
+            env:
+            - name: "POD_IP"
+              valueFrom:
+                fieldRef:
+                  fieldPath: status.podIP
+            {{- range $key, $val := $.Values.env }}
+            - name: {{ $key | quote }}
+              value: {{ $val | quote }}
+            {{- end }}
+            {{- end }}
+            command: {{ .command | toJson }}
+{{- end }}

helm/values.yaml

@@ -24,7 +24,7 @@ wagtail:
     repository: "ghcr.io/ietf-tools/www"
     pullPolicy: IfNotPresent
     # Overrides the image tag whose default is the chart appVersion.
-    # tag: "v2.1.3"
+    # tag: "v2.1.10"
 
   imagePullSecrets: []
   nameOverride: ""
@@ -199,6 +199,29 @@ memcached:
 
   affinity: {}
 
+# -------------------------------------------------------------
+# SCHEDULED JOBS
+# -------------------------------------------------------------
+
+cronjob:
+  crons:
+    - name: mgmt-hourly
+      schedule: "0 * * * *" # "At minute 0."
+      timeZone: "Etc/UTC"
+      image:
+        repository: "ghcr.io/ietf-tools/www"
+        pullPolicy: IfNotPresent
+        # tag: "v2.1.10"
+      command: ["python", "/app/manage.py", "publish_scheduled"]
+    - name: mgmt-weekly
+      schedule: "30 0 * * 0" # "At 00:30 on Sunday."
+      timeZone: "Etc/UTC"
+      image:
+        repository: "ghcr.io/ietf-tools/www"
+        pullPolicy: IfNotPresent
+        # tag: "v2.1.10"
+      command: ["python", "/app/manage.py", "update_index"]
+
 # -------------------------------------------------------------
 # COMMON
 # -------------------------------------------------------------