Use Azure Database for MySQL for AKS Workloads

Step-01: Introduction

• What are the problems with MySQL Pod & Azure Disks?
• How we are going to solve them using Azure MySQL Database?

Step-02: Create Azure Database for MySQL servers

• Go to Service Azure Database for MySQL servers
• Click on Add
• Basics
• Project details
  • Subscription: Free Trial
  • Resource Group: aks-rg1
• Server Details
  • Server name: akswebappdb (This name is based on availability - in your case it might be something else)
  • Data source: none
  • Location: (US) East US
  • Version: 5.7 (default)
  • Compute + Storage
    • Pricing Tier: Basic
    • VCore: 1
    • Storage: 5GB
    • Storage Auto Growth: Yes
    • Backup Retention: 7 days
    • Locally Redundant: Yes
• Administrative Account
  • Admin username: dbadmin
  • Password: Redhat1449
  • Confirm password: Redhat1449
• Review + Create
• It will take close to 15 minutes to create the database.

Step-03: Update Security Settings for Database

• Go to Azure Database for MySQL Servers -> akswebappdb
• Settings -> Connection Security
  • Very Important: Enable Allow Access to Azure Services
  • Update Firewall rules to allow from local desktop (Add current client IP Address)
  • SSL Settings: Disabled
  • Click on Save
• It will take close to 15 minutes for changes to take place.

# Template
mysql --host=mydemoserver.mysql.database.azure.com --user=myadmin@mydemoserver -p

# 
mysql --host=akswebappdb.mysql.database.azure.com --user=dbadmin@akswebappdb -p

Step-04: Create Kubernetes externalName service Manifest and Deploy

• Create mysql externalName Service
• 01-MySQL-externalName-Service.yml

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  type: ExternalName
  externalName: akswebappdb.mysql.database.azure.com

• Deploy Manifest

kubectl apply -f kube-manifests/01-MySQL-externalName-Service.yml

Step-04: Connect to RDS Database using kubectl and create usermgmt schema/db

# Template
kubectl run -it --rm --image=mysql:5.7.22 --restart=Never mysql-client -- mysql -h <AZURE-MYSQ-DB-HOSTNAME> -u <USER_NAME> -p<PASSWORD>

# Replace Host Name of Azure MySQL Database and Username and Password
kubectl run -it --rm --image=mysql:5.7.22 --restart=Never mysql-client -- mysql -h akswebappdb.mysql.database.azure.com -u dbadmin@akswebappdb -pRedhat1449

mysql> show schemas;
mysql> create database webappdb;
mysql> show schemas;
mysql> exit

Step-05: In User Management WebApp deployment file change username from root to dbadmin@akswebappdb

• 02-UserMgmtWebApp-Deployment.yml

# Change From
          - name: DB_USERNAME
            value: "root"
          - name: DB_PASSWORD
            value: "dbpassword11"               

# Change To dbadmin@<YOUR-Azure-MYSQL-DB-NAME>
            - name: DB_USERNAME
              value: "dbadmin@akswebappdb"            
            - name: DB_PASSWORD
              value: "Redhat1449"                  
             

Step-06: Deploy User Management WebApp and Test

# Deploy all Manifests
kubectl apply -f kube-manifests/

# List Pods
kubectl get pods

# Stream pod logs to verify DB Connection is successful from SpringBoot Application
kubectl logs -f <pod-name>

Step-07: Access Application

# Get Public IP
kubectl get svc

# Access Application
http://<External-IP-from-get-service-output>
Username: admin101
Password: password101

Step-08: Clean Up

# Delete all Objects created
kubectl delete -f kube-manifests/

# Verify current Kubernetes Objects
kubectl get all

# Delete Azure MySQL Database