How to set an ingress with ClusterIP in AWS-EKS - amazon-web-services

Question

I am new to the AWS EKS and I want to know how I can setup an ingress and enable TLS (with a free service such as lets-encrypt).
I have deployed an EKS cluster and I have the following sample nginx manifest.
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 2
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.14.2
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx-service-loadbalancer
spec:
type: LoadBalancer. // <------ can't I use a ClusterIp and still have a LB priovisioned?
selector:
app: nginx
ports:
- protocol: TCP
port: 80
targetPort: 80
---
#05-ALB-Ingress-Basic.yml
# Annotations Reference: https://kubernetes-sigs.github.io/aws-alb-ingress-controller/guide/ingress/annotation/
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
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
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: /*
pathType: Prefix
backend:
service:
name: nginx-service-loadbalancer
port:
number: 80
When it creates the LoadBalancer type service, it go ahead and creates a classic load balancer.
My questions are:
How can I provision (automatically) a Layer7 application load balancer and not the classic load balancer
Instead of using LoadBalancer type service, can I use a ClusterIP service and use my ingress to point to that and still create an automatic Load Balancer?
Thank you!

Answer 1

How can I provision (automatically) a Layer7 application load
balancer and not the classic load balancer
By using an ingress resource and specifying kubernetes.io/ingress.class: "alb".
Instead of using LoadBalancer type service, can I use a ClusterIP service and use my ingress to point to that and still
create an automatic Load Balancer?
yes, when used alb ingress resource with annotation alb.ingress.kubernetes.io/target-type: ip you can use a clusterip service.
so please don't create both a service-type loadbalancer and ingress resource at the same time.