container_aria

my file learn about tech container (docker, podman, kubernetes)

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ingress

• masalah saat mengekspose service
  • jika menggunakan NodePort
    • maka semua node harus di expose ke public
    • client harus tau semua ip address semua node
  • jika menggunakan load balancer
    • maka semua load balancer harus terekspose ke public
    • client harus tau ip address semua load balancer
• ingress => salah satu yang bisa digunakan untuk expose service
  • berbeda dengan LoadBalancer atau NodePort,
    • jika menggunakan ingress, client hanya butuh tahu satu ip address ingress
  • ketika client melakukan request ke ingress, pemilihan service nya ditentukan menggunakan hostname dari request
    • artinya bisa menggunakan /serviceA
  • ingress hanya mendukung protokol http
  • sebenernya ingress ini adalah nginx

configuration

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: ingress-name
  labels:
    label-key1: label-value1
spec:
  rules:
    - host: sub.domain.com
      http:
        paths:
          - path: /
            backend:
              serviceName: service-name
              servicePort: 80

example

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      name: nginx
  template:
    metadata:
      name: nginx
      labels:
        name: nginx
    spec:
      containers:
        - name: nginx
          image: nginx
          ports:
            - containerPort: 80

---

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    name: nginx
  ports:
    - port: 80
      targetPort: 80

---

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx-ingress
  labels:
    name: nginx-ingress
spec:
  ingressClassName: nginx
  rules:
    - host: nginx.aria.local
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
                service:
                  name: nginx-service
                  port:
                    number: 80

command

add addons, and check addons

minikube addons list
minikube addons enable ingress

kubectl get pod --namespace kube-system
kubectl get all --namespace ingress-nginx

kubectl get ingress

test ingress

kubectl create -f config.yaml

minikube ip
kubectl get ingress

echo "192.168.49.2    nginx.aria.local" >> /etc/hosts 

curl nginx.aria.local

kubectl delete ingress --all
kubectl delete all --all