Nginx Ingress Path 기반 라우팅 설정

Nginx Ingress에서 Path 기반 라우팅 설정하는 방법을 간단히 알아보자.

 

예제1) 정규식 표현

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/use-regex: "true"
spec:
  ingressClassName: nginx
  rules:
  - host: test.com
    http:
      paths:
      - path: /foo/.*
        pathType: Prefix
        backend:
          service:
            name: test
            port:
              number: 80

 

예제2) Path 우선순위

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-example
spec:
  ingressClassName: nginx
  rules:
  - host: test.com
    http:
      paths:
      - path: /foo/bar
        pathType: Prefix
        backend:
          service:
            name: service1
            port:
              number: 80
      - path: /foo/bar/
        pathType: Prefix
        backend:
          service:
            name: service2
            port:
              number: 80

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-example
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  ingressClassName: nginx
  rules:
  - host: test.com
    http:
      paths:
      - path: /foo/bar/(.+)
        pathType: Prefix
        backend:
          service:
            name: service3
            port: 
              number: 80

 

• test.com/foo/bar/1 matches ~* ^/foo/bar/.+ and will go to service 3.
• test.com/foo/bar/ matches ~* ^/foo/bar/ and will go to service 2.
• test.com/foo/bar matches ~* ^/foo/bar and will go to service 1.

 

예제3) rewrite

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$2
  name: ingress-example
spec:
  rules:
  - host: test.com
    http:
      paths:
      - path: /service(/|$)(.*)
        pathType: Prefix
        backend:
          service:
            name: test
            port:
              number: 80

• /service -> /
• /service/a1 -> /a1

 

예제4) App Root

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/app-root: /test1
  name: ingress-example
spec:
  rules:
  - host: test.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: service1
            port:
              number: 80

 

test.com로 접속을 하면 test.com/test1 경로로 redirect 된다.

 

예제5) 확장자 정규식

 

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/use-regex: "true"
    kubernetes.io/ingress.class: nginx
  name: ingress-example
spec:
  rules:
  - host: test.com
    http:
      paths:
      - path: '/*'
        pathType: Prefix
        backend:
          service:
            name: backend
            port:
              number: 8080
      - path: '/.*\.(jpg|svg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm|ttf|woff|woff2)$'
        pathType: Prefix
        backend:
          service:
            name: frontend
            port:
              number: 80

 

apache service와 tomcat service가 구분되어 있을 경우 확장자 형태로 분기할 수 있다.