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Host Based Ingress on Kubernetes Cluster

Bala Subramani K

• 3 min read
Host Based Ingress on Kubernetes Cluster

Part -I

Ingress on Kubernetes Cluster
On Local Cluster Created by using Kubeadm Why Ingress need on Kubernetes? Ingress is a key component in Kubernetes that provides HTTP and HTTPS routing to services based on rules defined by the user. Ingress may provide load balancing, SSL termination and name-based virtual hosting. In this blog, am going
Kubelancer NewsletterBala Subramani K

Name Based Virtual Hosting - Demo

Name-based virtual hosts support routing HTTP traffic to multiple host names at the same IP address.

  • Create 2 Deployment and Service for demo (to see multi-host purpose)
vi deployment-galaxian-astrion.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: galaxian
  labels:
    app: galaxian
spec:
  replicas: 1
  selector:
    matchLabels:
      app: galaxian
  template:
    metadata:
      labels:
        app: galaxian
    spec:
      containers:
      - name: galaxian
        image: kubelancer/galaxian:v1
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: galaxian-service
  labels:
    app: galaxian-service
spec:
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
  selector:
    app: galaxian
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: astrion
  labels:
    app: astrion
spec:
  replicas: 1
  selector:
    matchLabels:
      app: astrion
  template:
    metadata:
      labels:
        app: astrion
    spec:
      containers:
      - name: astrion
        image: kubelancer/astrion:v1
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: astrion-service
  labels:
    app: astrion-service
spec:
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
  selector:
    app: astrion
  • Apply the deployment and service 
kubectl apply -f deployment-galaxian-astrion.yaml
  • Get Deployments and Pods status
kubectl get deployments,pods,svc

Output

Create multi-host ingress

vi ingress-namebased.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-namebased
spec:
  ingressClassName: nginx
  rules:
  - host: astrion.kubelancer.com
    http:
      paths:
      - backend:
          service:
            name: astrion-service
            port:
              number: 80
        path: /
        pathType: Prefix
  - host: galaxian.kubelancer.com
    http:
      paths:
      - backend:
          service:
            name: galaxian-service
            port:
              number: 80
        path: /
        pathType: Prefix
  • Apply
kubectl apply -f ingress-namebased.yaml
  • Get ingress
kubectl get ingress

Output

Validate

curl --resolve astrion.kubelancer.com:80:192.168.10.0 http://astrion.kubelancer.com
curl --resolve galaxian.kubelancer.com:80:192.168.10.0 http://galaxian.kubelancer.com

Output

Happy Computing 😄