[Kubernetes] Ingress

ingress-controller 설치하기

ingress-controller 설치

$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.7.1/deploy/static/provider/aws/deploy.yaml

ingress-controller 설치 확인

$ kubectl get all -n ingress-nginx

• 참고 : https://kubernetes.github.io/ingress-nginx/deploy/#docker-desktop

ingress-controller 설정 확인하기

ingress-controller pod name 확인

$ kubectl get pods -n ingress-nginx
NAME                                        READY   STATUS      RESTARTS   AGE
ingress-nginx-admission-create-bnq6h        0/1     Completed   0          44m
ingress-nginx-admission-patch-tbktp         0/1     Completed   1          44m
ingress-nginx-controller-78cd9ffdfc-nd9x8   1/1     Running     0          44m

ingress-controller pod 접속

$ kubectl exec -it -n ingress-nginx ingress-nginx-controller-78cd9ffdfc-nd9x8 -- bash

nginx.conf 설정 확인

$ cat /etc/nginx/nginx.conf

기본 예제

ingress-basic.yml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: demo-ingress
spec:
  ingressClassName: nginx
  rules:
    - host: demo.ingress.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: hello-app-service
                port:
                  number: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: hello-app-service
spec:
  type: ClusterIP
  ports:
    - name: http
      protocol: TCP
      port: 8080
      targetPort: 8080
  selector:
    app: hello-app
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-app-deploy
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-app
  template:
    metadata:
      labels:
        app: hello-app
    spec:
      containers:
        - name: hello-app-container
          image: gcr.io/google-samples/hello-app:1.0
          ports:
            - containerPort: 8080

실행

$ kubectl apply -f ingress-basic.yml

ingress 확인

$ kubectl get ingress
NAME           CLASS   HOSTS              ADDRESS     PORTS   AGE
demo-ingress   nginx   demo.ingress.com   localhost   80      2m36s

요청

$ curl demo.ingress.com
Hello, world!
Version: 1.0.0
Hostname: hello-app-deploy-6d8d4ff7f6-6ptwj

ingress proxy 예제

ingress-proxy.yml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: demo-ingress
  annotations:
    nginx.ingress.kubernetes.io/server-snippet: |
      location /todos {
        proxy_pass https://dummyjson.com;
        proxy_http_version 1.1;
      }
spec:
  ingressClassName: nginx
  rules:
    - host: demo.ingress.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: hello-app-service
                port:
                  number: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: hello-app-service
spec:
  type: ClusterIP
  ports:
    - name: http
      protocol: TCP
      port: 8080
      targetPort: 8080
  selector:
    app: hello-app
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-app-deploy
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-app
  template:
    metadata:
      labels:
        app: hello-app
    spec:
      containers:
        - name: hello-app-container
          image: gcr.io/google-samples/hello-app:1.0
          ports:
            - containerPort: 8080

실행

$ kubectl apply -f ingress-proxy.yml

요청

$ curl demo.ingress.com
Hello, world!
Version: 1.0.0
Hostname: hello-app-deploy-6d8d4ff7f6-r4g5g

$ curl demo.ingress.com/todos/1
{"id":1,"todo":"Do something nice for someone I care about","completed":true,"userId":26}