Add Helm chart for the expense tracker (app, Postgres, ingress, backups)

- Deployment/Service for the app, StatefulSet/Service for Postgres 17 - Secrets (DB password, session secret, Google client, allowed e-mails) via ExternalSecret from OpenBao - Ingress with a Let's Encrypt certificate, NetworkPolicy for Postgres - Nightly pg_dump CronJob - Optional OpenBao OIDC provider setup script Co-Authored-By: Claude Sonnet 5 <[email protected]>
2026-09-20 18:46:19 +02:00
commit 2ee46ceb4a
13 changed files with 881 additions and 0 deletions
@@ -0,0 +1,118 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: expense-tracker-postgres
+  namespace: {{ .Values.namespace.name }}
+  labels:
+    app.kubernetes.io/name: expense-tracker-postgres
+    {{- include "expense-tracker.labels" . | nindent 4 }}
+spec:
+  selector:
+    app.kubernetes.io/name: expense-tracker-postgres
+  ports:
+    - name: postgres
+      port: 5432
+      targetPort: postgres
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: expense-tracker-postgres
+  namespace: {{ .Values.namespace.name }}
+  labels:
+    app.kubernetes.io/name: expense-tracker-postgres
+    {{- include "expense-tracker.labels" . | nindent 4 }}
+spec:
+  serviceName: expense-tracker-postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: expense-tracker-postgres
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: expense-tracker-postgres
+    spec:
+      securityContext:
+        # uid/gid of the `postgres` user in the alpine image
+        runAsUser: 70
+        runAsGroup: 70
+        fsGroup: 70
+        runAsNonRoot: true
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: postgres
+          image: {{ .Values.postgres.image | quote }}
+          ports:
+            - name: postgres
+              containerPort: 5432
+          env:
+            - name: POSTGRES_DB
+              value: {{ .Values.postgres.database | quote }}
+            - name: POSTGRES_USER
+              value: {{ .Values.postgres.user | quote }}
+            # Only used when the data directory is first initialised; changing it later in
+            # OpenBao does NOT change the database user's password (see README).
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: expense-tracker-db
+                  key: POSTGRES_PASSWORD
+            # A sub-directory, because the volume root may contain lost+found.
+            - name: PGDATA
+              value: /var/lib/postgresql/data/pgdata
+          readinessProbe:
+            exec:
+              command: ["sh", "-c", "pg_isready -U \"$POSTGRES_USER\" -d \"$POSTGRES_DB\""]
+            periodSeconds: 5
+            timeoutSeconds: 3
+          livenessProbe:
+            exec:
+              command: ["sh", "-c", "pg_isready -U \"$POSTGRES_USER\" -d \"$POSTGRES_DB\""]
+            initialDelaySeconds: 30
+            periodSeconds: 20
+            timeoutSeconds: 3
+            failureThreshold: 6
+          securityContext:
+            allowPrivilegeEscalation: false
+            capabilities:
+              drop: ["ALL"]
+          resources:
+            {{- toYaml .Values.postgres.resources | nindent 12 }}
+          volumeMounts:
+            - name: data
+              mountPath: /var/lib/postgresql/data
+            # Unix socket dir + scratch space (the image writes there as the postgres user)
+            - name: run
+              mountPath: /var/run/postgresql
+            - name: tmp
+              mountPath: /tmp
+      volumes:
+        - name: run
+          emptyDir: {}
+        - name: tmp
+          emptyDir: {}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        {{- if .Values.postgres.persistence.storageClassName }}
+        storageClassName: {{ .Values.postgres.persistence.storageClassName }}
+        {{- end }}
+        resources:
+          requests:
+            storage: {{ .Values.postgres.persistence.size }}