今天在公司有前后端项目需要上线，需要把/api开头的路径转发给后端，同时去掉api 。类似于/api/login->后端/login 的rewrite .参考以前的文件 对traefik进行ingress 注解，发现无效。大体如下：
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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: traefik
kubesphere.io/creator: admin
traefik.ingress.kubernetes.io/rule-type: PathPrefixStrip
creationTimestamp: "2021-12-22T09:28:28Z"
generation: 6
name: tset
namespace: default
resourceVersion: "2108536"
uid: 8d07fd41-8508-4b6a-8ff0-c6e14e7003d9
spec:
ingressClassName: traefik
rules:
- host: nexus-test.kube-test.lkad.net
http:
paths:
- backend:
service:
name: test-svc
port:
number: 80
path: /api
pathType: ImplementationSpecific
status:
loadBalancer: {}
发现无解，后来查看官方网站 发现 : v1的traefik ingress 是这么实现的 把example.org/admin/ 转发给admin-svc/
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apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: traefik
annotations:
kubernetes.io/ingress.class: traefik
traefik.ingress.kubernetes.io/rule-type: PathPrefixStrip
spec:
rules:
- host: example.org
http:
paths:
- path: /admin
backend:
serviceName: admin-svc
servicePort: admin
v2版本需要用到ingress route 和一些中间件
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---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: http-redirect-ingressroute
namespace: admin-web
spec:
entryPoints:
- web
routes:
- match: Host(`example.org`) && PathPrefix(`/admin`)
kind: Rule
services:
- name: admin-svc
port: admin
middlewares:
- name: admin-stripprefix
---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: admin-stripprefix
spec:
stripPrefix:
prefixes:
- /admin
上面的示例就是先配置了一个 ingress route ，匹配到example.org/admin 转发给admin-svc 同时加入了一个中间的处理器admin-stripprefix. 这个处理器西面进行了中间件的定义 采用stripPrefix 对/admin的前缀进行去除。这样就相当于example.org/admin->admin-svc/了。 下面的示例，定义了一个redirect的规则的middleware ，然后再使用这个middleware 就可以了。 redirect
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---
# Redirect with domain replacement
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: test-redirectregex
spec:
redirectRegex:
regex: ^http://localhost/(.*)
replacement: http://mydomain/${1}
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
name: http-redirect-ingressroute
namespace: admin-web
spec:
entryPoints:
- web
routes:
- match: Host(`localhost`) && PathPrefix(`/admin`)
kind: Rule
services:
- name: admin-svc
port: admin
middlewares:
- name: test-redirectregex
同域名下的复杂规则重定向:可以使用ReplacePathRegex 这种就是通过正则替换来实现重定向
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# Replace path with regex
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: test-replacepathregex
spec:
replacePathRegex:
regex: ^/foo/(.*)
replacement: /bar/$1
还能通过正则来匹配进行前缀删除
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apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
name: test-stripprefixregex
spec:
stripPrefixRegex:
regex:
- "/foo/[a-z0-9]+/[0-9]+/"