Implement Helm deployment and update configurations

Switch the deployment process to Helm by introducing a Helm release for the todoapp chart, including a dependency on MySQL. Update configuration details such as the DB_HOST, and ensure consistency with resource names by changing configMap and adding a mysql-service. Remove manual Kubernetes apply commands from the bootstrap script in favor of using Helm for deployment and management.

bootstrap.sh

@@ -1,20 +1,5 @@
 #!/bin/bash
-kubectl apply -f .infrastructure/mysql/ns.yml
-kubectl apply -f .infrastructure/mysql/configMap.yml
-kubectl apply -f .infrastructure/mysql/secret.yml
-kubectl apply -f .infrastructure/mysql/service.yml
-kubectl apply -f .infrastructure/mysql/statefulSet.yml
 
-kubectl apply -f .infrastructure/app/ns.yml
-kubectl apply -f .infrastructure/app/pv.yml
-kubectl apply -f .infrastructure/app/pvc.yml
-kubectl apply -f .infrastructure/app/secret.yml
-kubectl apply -f .infrastructure/app/configMap.yml
-kubectl apply -f .infrastructure/app/clusterIp.yml
-kubectl apply -f .infrastructure/app/nodeport.yml
-kubectl apply -f .infrastructure/app/hpa.yml
-kubectl apply -f .infrastructure/app/deployment.yml
+kubectl taint nodes -l app=mysql app=mysql:NoSchedule
 
-# Install Ingress Controller
-kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml
-# kubectl apply -f .infrastructure/ingress/ingress.yml
+helm install todoapp-release ./helm-chart/todoapp

helm-chart/todoapp/Chart.yaml

@@ -11,3 +11,7 @@ version: 1.0.0
 
 # The app version number, reflective of the application's current version. Use quotes.
 appVersion: "1.16.0"
+
+dependencies:
+  - name: mysql
+    version: 0.1.0

helm-chart/todoapp/charts/mysql/templates/statefulSet.yml

@@ -87,7 +87,7 @@ spec:
                     {{- range .values }}
                       - {{ . }}
                     {{ end }}
-              topologyKey: {{ .topologyKey }}}
+              topologyKey: {{ .topologyKey }}
           {{- end }}
         nodeAffinity:
           {{- with .Values.mysql.nodeAffinity }}

helm-chart/todoapp/templates/deployment.yml

@@ -77,7 +77,7 @@ spec:
           secretName: {{ .Chart.Name }}-secret
       - name: app-config-volume
         configMap:
-          name: app-config
+          name: {{ .Chart.Name }}-config
       affinity:
         {{- with .Values.todoapp.nodeAffinity }}
         nodeAffinity:

helm-chart/todoapp/values.yaml

@@ -10,7 +10,7 @@ todoapp:
     DB_NAME: "app_db"
     DB_USER: "app_user"
     DB_PASSWORD: "1234"
-    DB_HOST: "mysql-0.mysql.mysql.svc.cluster.local"
+    DB_HOST: "mysql-0.mysql-service.mysql.svc.cluster.local"
 
   resources:
     cpu: