microservice/templates/_helpers.tpl

charts/microservice/Chart.yaml

@@ -1,5 +1,6 @@
 apiVersion: v2
 name: microservice
+fullname: microservice-application
 description: A Helm chart for a microservice in Kubernetes
 
 type: application

charts/microservice/templates/_helpers.tpl

@@ -0,0 +1,15 @@
+{{- define "microservice.name" -}}
+{{- .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{- define "microservice.fullname" -}}
+{{- printf "%s-%s" (include "microservice.name" .) .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{- define "microservice.labels" -}}
+app: {{ include "microservice.name" . }}
+{{- end -}}
+
+{{- define "microservice.selectorLabels" -}}
+app: {{ include "microservice.name" . }}
+{{- end -}}

charts/microservice/templates/deployment.yaml

@@ -20,5 +20,16 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           ports:
             - name: http
-              containerPort: 80
-              protocol: TCP
+              containerPort: {{ .Values.httpPort }}
+              protocol: {{ .Values.protocol }}
+          env:
+            - name: MY_CONFIG_KEY
+              valueFrom:
+                configMapKeyRef:
+                  name: {{ include "microservice.fullname" . }}-config
+                  key: my-config-key
+            - name: MY_SECRET_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "microservice.fullname" . }}-secret
+                  key: my-secret-key

charts/microservice/templates/nginx-configmap.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "microservice.fullname" . }}-config
+data:
+  my-config-key: my-config-value

charts/microservice/templates/nginx-secret.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "microservice.fullname" . }}-secret
+type: Opaque
+data:
+  my-secret-key: {{ "my-secret-value" | b64enc }}

charts/microservice/templates/nginx-service-account.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "microservice.fullname" . }}-sa

charts/microservice/templates/service.yaml

@@ -5,11 +5,10 @@ metadata:
   labels:
     {{- include "microservice.labels" . | nindent 4 }}
 spec:
-  type: {{ .Values.service.type }}
-  ports:
-    - port: {{ .Values.service.port }}
-      targetPort: http
-      protocol: TCP
-      name: http
   selector:
     {{- include "microservice.selectorLabels" . | nindent 4 }}
+  ports:
+    - name: http
+      protocol: TCP
+      port: {{ .Values.service.port }}
+      targetPort: {{ .Values.httpPort }}

charts/microservice/values.yaml

@@ -1,10 +1,25 @@
-replicaCount: 1
+
+labels:
+  app: micro
+
+selectorLabels:
+  app: microservice
+  release: stable
+
+replicaCount: 3
 
 image:
-  repository: nginx # your microservice image name 
+  repository: nginx
+  tag: latest
   pullPolicy: IfNotPresent
-  tag: "latest"     # your microservice image tag
+
+protocol: TCP
 
 service:
-  type: ClusterIP
   port: 80
+
+configMap:
+  my-config-key: nginx-config-value
+
+secret:
+  my-secret-key: nginx-secret-value