Ingress ALB Internal Load #19

 Ingress ALB Internal Load

 

Create Curl Pod

Cmd to test Ingress AWS Internal ALB using curl pod

Step-01: Introduction

• Create Internal Application Load Balancer using Ingress
• To test the Internal LB, use the curl-pod
• Deploy curl-pod
• Connect to curl-pod and test Internal LB from curl-pod

Step-02: Update Ingress Scheme annotation to Internal

• File Name: 04-ALB-Ingress-Internal-LB.yml

    # Creates Internal Application Load Balancer
    alb.ingress.kubernetes.io/scheme: internal 

Step-03: Deploy all Application Kubernetes Manifests and Verify

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

# Verify Ingress Resource
kubectl get ingress

# Verify Apps
kubectl get deploy
kubectl get pods

# Verify NodePort Services
kubectl get svc

Verify Load Balancer & Target Groups

• Load Balancer - Listeneres (Verify both 80 & 443)
• Load Balancer - Rules (Verify both 80 & 443 listeners)
• Target Groups - Group Details (Verify Health check path)
• Target Groups - Targets (Verify all 3 targets are healthy)

Step-04: How to test this Internal Load Balancer?

• We are going to deploy a curl-pod in EKS Cluster
• We connect to that curl-pod in EKS Cluster and test using curl commands for our sample applications load balanced using this Internal Application Load Balancer

Step-05: curl-pod Kubernetes Manifest

• File Name: kube-manifests-curl/01-curl-pod.yml

apiVersion: v1
kind: Pod
metadata:
  name: curl-pod
spec:
  containers:
  - name: curl
    image: curlimages/curl 
    command: [ "sleep", "600" ]

Step-06: Deploy curl-pod and Verify Internal LB

# Deploy curl-pod
kubectl apply -f kube-manifests-curl

# Will open up a terminal session into the container
kubectl exec -it curl-pod -- sh

# We can now curl external addresses or internal services:
curl http://google.com/
curl <INTERNAL-INGRESS-LB-DNS>

# Default Backend Curl Test
curl internal-ingress-internal-lb-1839544354.us-east-1.elb.amazonaws.com

# App1 Curl Test
curl internal-ingress-internal-lb-1839544354.us-east-1.elb.amazonaws.com/app1/index.html

# App2 Curl Test
curl internal-ingress-internal-lb-1839544354.us-east-1.elb.amazonaws.com/app2/index.html

# App3 Curl Test
curl internal-ingress-internal-lb-1839544354.us-east-1.elb.amazonaws.com

Step-07: Clean Up

# Delete Manifests
kubectl delete -f kube-manifests/
kubectl delete -f kube-manifests-curl/