The Helm chart now allows setting configuration

Author: MrMatAP

var/helm/Chart.yaml

@@ -2,14 +2,5 @@ apiVersion: v2
 name: mrmat-python-api-fastapi
 description: A Helm chart for MrMat Python API FastAPI
 type: application
-
-# This is the chart version. This version number should be incremented each time you make changes
-# to the chart and its templates, including the app version.
-# Versions are expected to follow Semantic Versioning (https://semver.org/)
 version: "0.0.0"
-
-# This is the version number of the application being deployed. This version number should be
-# incremented each time you make changes to the application. Versions are not expected to
-# follow Semantic Versioning. They should reflect the version the application is using.
-# It is recommended to use it with quotes.
 appVersion: "0.0.0.dev0"

var/helm/templates/_helpers.tpl

@@ -0,0 +1,8 @@
+
+{{/* Common labels */}}
+{{ define "common.labels" }}
+app: mpafastapi
+version: {{ .Chart.AppVersion }}
+app.kubernetes.io/part-of: mpafastapi
+app.kubernetes.io/version: {{ .Chart.AppVersion }}
+{{ end }}

var/helm/templates/deployment.yaml

@@ -1,36 +1,41 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: mrmat-python-api-fastapi
+  name: mpafastapi
   labels:
-    app.kubernetes.io/name: mrmat-python-api-fastapi
-    app.kubernetes.io/part-of: mrmat-python-api-fastapi
+    app.kubernetes.io/name: mpafastapi
+    {{ include "common.labels" . | nindent 4 }}
 spec:
   replicas: {{ .Values.pod.replicas | int }}
   selector:
     matchLabels:
-      app: {{ .Values.pod.name }}
-      version: {{ .Chart.AppVersion }}
+      {{ include "common.labels" . | nindent 6 }}
   template:
     metadata:
       labels:
-        sidecar.istio.io/inject: "true"
-        app: {{ .Values.pod.name }}
-        version: {{ .Chart.AppVersion }}
-        app.kubernetes.io/name: mrmat-python-api-fastapi
-        app.kubernetes.io/part-of: mrmat-python-api-fastapi
+        {{ include "common.labels" . | nindent 8 }}
       annotations:
         prometheus.io/scrape: "true"
         prometheus.io/scheme: http
         prometheus.io/port: "8000"
         prometheus.io/path: /metrics
     spec:
-      serviceAccountName: {{ .Values.serviceAccount.name }}
+      serviceAccountName: {{ .Values.sa.name }}
+      volumes:
+      - name: config-volume
+        secret:
+          secretName: config-mpafastapi
+      - name: data-volume
+        emptyDir:
+          sizeLimit: 10Mi
+          medium: Memory
       containers:
-        - name: mrmat-python-api-fastapi
+        - name: mpafastapi
           image: {{ .Values.pod.repository }}:{{ .Chart.AppVersion }}
           imagePullPolicy: {{ .Values.pod.imagePullPolicy }}
           env:
+          - name: APP_CONFIG
+            value: /config/app_config.json
           - name: OTEL_SERVICE_NAME
             value: "mrmat-python-api-fastapi"
           - name: OTEL_TRACES_EXPORTER
@@ -51,6 +56,12 @@ spec:
           - name: http
             containerPort: {{ .Values.pod.port }}
             protocol: TCP
+          volumeMounts:
+          - name: config-volume
+            mountPath: /config
+            readOnly: true
+          - name: data-volume
+            mountPath: /data
           securityContext:
             capabilities:
               drop:

var/helm/templates/httproute.yaml

@@ -0,0 +1,31 @@
+{{- if .Values.route.enabled -}}
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: {{ .Values.route.name }}
+  labels:
+    {{ include "common.labels" . | nindent 4 }}
+spec:
+  hostnames:
+  {{- range .Values.route.hostnames }}
+  - {{ . | quote }}
+  {{- end }}
+  parentRefs:
+  {{- range .Values.route.parents }}
+  - group: gateway.networking.k8s.io
+    kind: Gateway
+    name: {{ .name }}
+    namespace: {{ .namespace }}
+    sectionName: mpafastapi
+  {{- end }}
+  rules:
+  - backendRefs:
+    - kind: Service
+      name: {{ .Values.svc.name }}
+      port: {{ .Values.svc.port }}
+      weight: 1
+    matches:
+    - path:
+        type: PathPrefix
+        value: /
+{{- end -}}

var/helm/templates/route.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: config-mpafastapi
+  labels:
+    app.kubernetes.io/name: config-mpafastapi
+    {{ include "common.labels" . | nindent 4 }}
+stringData:
+  app_config.json: |-
+    { "db_url": {{ .Values.config.db_url | quote }} }

var/helm/templates/secret.yaml

@@ -1,16 +1,13 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: {{ .Values.service.name }}
+  name: {{ .Values.svc.name }}
   labels:
-    app: {{ .Values.pod.name }}
-    version: {{ .Chart.AppVersion }}
-    app.kubernetes.io/name: {{ .Values.service.name }}
-    app.kubernetes.io/part-of: mrmat-python-api-fastapi
+    {{ include "common.labels" . | nindent 4 }}
 spec:
   type: ClusterIP
   ports:
-    - port: {{ .Values.service.port }}
+    - port: {{ .Values.svc.port }}
       targetPort: {{ .Values.pod.port }}
       protocol: TCP
       name: http

var/helm/templates/service.yaml

@@ -1,10 +1,7 @@
 apiVersion: v1
 kind: ServiceAccount
 metadata:
-  name: {{ .Values.serviceAccount.name }}
+  name: {{ .Values.sa.name }}
   labels:
-    app: {{ .Values.pod.name }}
-    version: {{ .Chart.AppVersion }}
-    app.kubernetes.io/name: {{ .Values.serviceAccount.name }}
-    app.kubernetes.io/part-of: mrmat-python-api-fastapi
+    {{ include "common.labels" . | nindent 4 }}
 automountServiceAccountToken: true

var/helm/templates/serviceaccount.yaml

@@ -1,46 +1,28 @@
 #
-# Default values
+# Default values for MrMat :: Python API FastAPI
 
-# This is to override the chart name.
-nameOverride: ""
-fullnameOverride: ""
-
-serviceAccount:
-  name: mrmat-python-api-fastapi-sa
+sa:
+  name: sa-mpafastapi
 
 pod:
-  name: mrmat-python-api-fastapi
+  name: mpafastapi
   replicas: 1
   repository: registry:5000/mrmat-python-api-fastapi
   imagePullPolicy: Always
   port: 8000
 
-service:
-  name: mrmat-python-api-fastapi-svc
+svc:
+  name: svc-mpafastapi
   port: 80
 
-httproute:
+route:
   enabled: true
-  name: mrmat-python-api-fastapi-httproute
+  name: route-mpafastapi
   hostnames:
-  - mrmat-python-api-fastapi.covenant.local
+  - mpafastapi.covenant.local
   parents:
   - name: edge-ingress
     namespace: edge
 
-ingress:
-  enabled: false
-  name: mrmat-python-api-fastapi-ing
-  className: ""
-  annotations: { }
-    # kubernetes.io/ingress.class: nginx
-  # kubernetes.io/tls-acme: "true"
-  hosts:
-  - host: mrmat-python-api-fastapi.local
-    paths:
-    - path: /
-      pathType: ImplementationSpecific
-  tls: [ ]
-  #  - secretName: chart-example-tls
-  #    hosts:
-  #      - chart-example.local
+config:
+  db_url: "sqlite:///data/db.sqlite"