AWS EKS Kubernetes ALB Ingress Path Based Routing (2024)

#01-MySQL-externalName-Service.ymlapiVersion: v1kind: Servicemetadata: name: mysqlspec: type: ExternalName externalName: usermgmtdb.cxojydmxwly6.us-east-1.rds.amazonaws.com

#02-UserManagementMicroservice-Deployment-Service.ymlapiVersion: apps/v1kind: Deployment metadata: name: usermgmt-microservice labels: app: usermgmt-restappspec: replicas: 1 selector: matchLabels: app: usermgmt-restapp template: metadata: labels: app: usermgmt-restapp spec: initContainers: - name: init-db image: busybox:1.31 command: ['sh', '-c', 'echo -e "Checking for the availability of MySQL Server deployment"; while ! nc -z mysql 3306; do sleep 1; printf "-"; done; echo -e " >> MySQL DB Server has started";'] containers: - name: usermgmt-restapp image: stacksimplify/kube-usermanagement-microservice:1.0.0 ports: - containerPort: 8095 env: - name: DB_HOSTNAME value: "mysql" - name: DB_PORT value: "3306" - name: DB_NAME value: "usermgmt" - name: DB_USERNAME value: "dbadmin" # RDS DB Username is dbadmin  - name: DB_PASSWORD valueFrom: secretKeyRef: name: mysql-db-password key: db-password livenessProbe: exec: command: - /bin/sh - -c - nc -z localhost 8095 initialDelaySeconds: 60 periodSeconds: 10 readinessProbe: httpGet: path: /usermgmt/health-status port: 8095 initialDelaySeconds: 60 periodSeconds: 10 

#03-Kubernetes-Secrets.ymlapiVersion: v1kind: Secretmetadata: name: mysql-db-passwordtype: Opaquedata: db-password: ZGJwYXNzd29yZDEx

#04-UserManagement-NodePort-Service.ymlapiVersion: v1kind: Servicemetadata: name: usermgmt-restapp-nodeport-service labels: app: usermgmt-restapp annotations:#Important Note: Need to add health check path annotations in service level if we are planning to use multiple targets in a load balancer  alb.ingress.kubernetes.io/healthcheck-path: /usermgmt/health-status spec: type: NodePort selector: app: usermgmt-restapp ports: - port: 8095 targetPort: 8095

#05-Nginx-App1-Deployment-and-NodePortService.ymlapiVersion: apps/v1kind: Deploymentmetadata: name: app1-nginx-deployment labels: app: app1-nginxspec: replicas: 1 selector: matchLabels: app: app1-nginx template: metadata: labels: app: app1-nginx spec: containers: - name: app1-nginx image: stacksimplify/kube-nginxapp1:1.0.0 ports: - containerPort: 80---apiVersion: v1kind: Servicemetadata: name: app1-nginx-nodeport-service labels: app: app1-nginx annotations:#Important Note: Need to add health check path annotations in service level if we are planning to use multiple targets in a load balancer  alb.ingress.kubernetes.io/healthcheck-path: /app1/index.htmlspec: type: NodePort selector: app: app1-nginx ports: - port: 80 targetPort: 80

#06-Nginx-App2-Deployment-and-NodePortService.ymlapiVersion: apps/v1kind: Deploymentmetadata: name: app2-nginx-deployment labels: app: app2-nginx spec: replicas: 1 selector: matchLabels: app: app2-nginx template: metadata: labels: app: app2-nginx spec: containers: - name: app2-nginx image: stacksimplify/kube-nginxapp2:1.0.0 ports: - containerPort: 80---apiVersion: v1kind: Servicemetadata: name: app2-nginx-nodeport-service labels: app: app2-nginx annotations:#Important Note: Need to add health check path annotations in service level if we are planning to use multiple targets in a load balancer alb.ingress.kubernetes.io/healthcheck-path: /app2/index.htmlspec: type: NodePort selector: app: app2-nginx ports: - port: 80 targetPort: 80

#07-ALB-Ingress-ContextPath-Based-Routing.yml# Annotations Reference: https://kubernetes-sigs.github.io/aws-alb-ingress-controller/guide/ingress/annotation/apiVersion: extensions/v1beta1kind: Ingressmetadata: name: ingress-usermgmt-restapp-service labels: app: usermgmt-restapp annotations: # Ingress Core Settings kubernetes.io/ingress.class: "alb" alb.ingress.kubernetes.io/scheme: internet-facing # Health Check Settings alb.ingress.kubernetes.io/healthcheck-protocol: HTTP alb.ingress.kubernetes.io/healthcheck-port: traffic-port#Important Note: Need to add health check path annotations in service level if we are planning to use multiple targets in a load balancer  #alb.ingress.kubernetes.io/healthcheck-path: /usermgmt/health-status alb.ingress.kubernetes.io/healthcheck-interval-seconds: '15' alb.ingress.kubernetes.io/healthcheck-timeout-seconds: '5' alb.ingress.kubernetes.io/success-codes: '200' alb.ingress.kubernetes.io/healthy-threshold-count: '2' alb.ingress.kubernetes.io/unhealthy-threshold-count: '2'spec: rules: - http: paths: - path: /app1/* backend: serviceName: app1-nginx-nodeport-service servicePort: 80 - path: /app2/* backend: serviceName: app2-nginx-nodeport-service servicePort: 80 - path: /* backend: serviceName: usermgmt-restapp-nodeport-service servicePort: 8095 # Important Note-1: In path based routing order is very important, if we are going to use "/*", try to use it at the end of all rules.