Fix .gitignore and add Helm chart

.gitignore

@@ -1 +1 @@
-hello-svc
+/hello-svc

helm/hello-svc/Chart.yaml

@@ -0,0 +1,6 @@
+apiVersion: v2
+name: hello-svc
+description: A minimal Go HTTP service for platform engineering practice
+type: application
+version: 0.1.0
+appVersion: "0.1.0"

helm/hello-svc/templates/_helpers.tpl

@@ -0,0 +1,20 @@
+{{- define "hello-svc.name" -}}
+{{- .Chart.Name }}
+{{- end }}
+
+{{- define "hello-svc.fullname" -}}
+{{- .Release.Name }}
+{{- end }}
+
+{{- define "hello-svc.labels" -}}
+helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+app.kubernetes.io/name: {{ include "hello-svc.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{- define "hello-svc.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "hello-svc.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}

helm/hello-svc/templates/deployment.yaml

@@ -0,0 +1,39 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "hello-svc.fullname" . }}
+  labels:
+    {{- include "hello-svc.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "hello-svc.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "hello-svc.selectorLabels" . | nindent 8 }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - containerPort: {{ .Values.service.targetPort }}
+          env:
+            {{- range $k, $v := .Values.env }}
+            - name: {{ $k }}
+              value: {{ $v | quote }}
+            {{- end }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: {{ .Values.service.targetPort }}
+            initialDelaySeconds: 5
+          readinessProbe:
+            httpGet:
+              path: /healthz
+              port: {{ .Values.service.targetPort }}
+            initialDelaySeconds: 5

helm/hello-svc/templates/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "hello-svc.fullname" . }}
+  labels:
+    {{- include "hello-svc.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    {{- include "hello-svc.selectorLabels" . | nindent 4 }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.targetPort }}

helm/hello-svc/templates/servicemonitor.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ include "hello-svc.fullname" . }}
+  labels:
+    {{- include "hello-svc.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "hello-svc.selectorLabels" . | nindent 6 }}
+  endpoints:
+    - port: {{ .Values.service.port | toString }}
+      path: /metrics
+      interval: {{ .Values.serviceMonitor.interval }}
+{{- end }}

helm/hello-svc/values.yaml

@@ -0,0 +1,28 @@
+replicaCount: 1
+
+image:
+  repository: git.samidare.dev/rod/hello-svc
+  pullPolicy: Always
+  tag: "latest"
+
+env:
+  APP_ENV: production
+  LOG_LEVEL: info
+  APP_VERSION: unknown
+
+service:
+  type: ClusterIP
+  port: 80
+  targetPort: 8080
+
+resources:
+  requests:
+    cpu: 100m
+    memory: 64Mi
+  limits:
+    cpu: 500m
+    memory: 128Mi
+
+serviceMonitor:
+  enabled: true
+  interval: 30s