helm-webapp

helm-webapp/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

helm-webapp/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: webapp
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+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: 0.1.0
+
+# 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: "1.16.0"

helm-webapp/templates/NOTES.txt

@@ -0,0 +1,2 @@
+servicename=$(k get service -l "app={{ .Values.appName }}" -o jsonpath="{.items[0].metadata.name}")
+kubectl --namespace <namespace> port-forward service/{{ .Values.appName }} 8888:80

helm-webapp/templates/configmap.yaml

@@ -0,0 +1,8 @@
+kind: ConfigMap 
+apiVersion: v1 
+metadata:
+  name: {{ .Values.configmap.name }}
+data:
+  BG_COLOR: '#12181b'
+  FONT_COLOR: '#FFFFFF'
+  CUSTOM_HEADER: {{ .Values.configmap.data.CUSTOM_HEADER }}

helm-webapp/templates/deployment.yaml

@@ -0,0 +1,33 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Values.appName }}
+  labels:
+    app: {{ .Values.appName }}
+spec:
+  replicas: 5
+  selector:
+    matchLabels:
+      app: {{ .Values.appName }}
+      tier: frontend
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.appName }}
+        tier: frontend
+    spec: # Pod spec
+      containers:
+      - name: mycontainer
+        image: "{{ .Values.image.name }}:{{ .Values.image.tag }}"
+        ports:
+        - containerPort: 80
+        envFrom:
+        - configMapRef:
+            name: {{ .Values.configmap.name }}
+        resources:
+          requests:
+            memory: "16Mi" 
+            cpu: "50m"    # 500milliCPUs (1/2 CPU)
+          limits:
+            memory: "128Mi"
+            cpu: "100m"

helm-webapp/templates/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Values.appName }}
+  labels:
+    app: {{ .Values.appName }}
+spec:
+  ports:
+  - port: 80
+    protocol: TCP
+    name: flask
+  selector:
+    app: {{ .Values.appName }}
+    tier: frontend
+  type: LoadBalancer

helm-webapp/values-dev.yaml

@@ -0,0 +1,4 @@
+
+configmap:
+  data:
+    CUSTOM_HEADER: 'This is on the DEV environment!'

helm-webapp/values-prod.yaml

@@ -0,0 +1,4 @@
+
+configmap:
+  data:
+    CUSTOM_HEADER: 'This is on the PROD environment!'

helm-webapp/values.yaml

@@ -0,0 +1,12 @@
+appName: myhelmapp
+
+port: 80
+
+configmap:
+  name: myhelmapp-configmap-v1
+  data:
+    CUSTOM_HEADER: 'This app was deployed with helm!'
+
+image:
+  name: devopsjourney1/mywebapp
+  tag: latest