在kubernetes中徒步进入入口自定义错误

Question

我需要在kubernetes上的traefik ingress中设置自定义错误，这样当没有端点或状态为“404”或“[500-600]”时，它会重定向到另一个错误服务或另一个自定义错误消息我使用了注释，就像它在入口文件中的文档一样（注意：这是一个将注释作为yaml传递给values.yaml文件的helm模板输出）

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: frontend
  namespace: "default"
  annotations:
      external-dns.alpha.kubernetes.io/target: "domain.com"
      kubernetes.io/ingress.class: "traefik"
      traefik.ingress.kubernetes.io/error-pages: "map[/:map[backend:hello-world status:[502 503]]]"
spec:
  rules:
  - host: frontend.domain.com
    http:
      paths:
      - backend:
          serviceName: frontend
          servicePort: 3000
        path: /

Answer 1

ldez的答案是正确的，但有几点需要注意：

• 首先，这些注释仅适用于traefik> = 1.6.x（早期版本可能支持错误页面，但不适用于kubernetes后端）
• 其次，必须通过kubernetes配置traefik后端。您无法在配置文件中创建后端并将其与kubernetes一起使用，至少在traefik 1.6.x中不能使用

这是完整的事情的样子。 foo只是一个名字，正如另一个答案所解释的那样，可以是任何东西：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: frontend
  namespace: "default"
  annotations:
      external-dns.alpha.kubernetes.io/target: "domain.com"
      kubernetes.io/ingress.class: "traefik"
      traefik.ingress.kubernetes.io/error-pages: |-
        foo:
          status:
          - "404"
          - "500"
          # See below on where "error-pages" comes from
          backend: error-pages
          query: "/{{status}}.html"
spec:
  rules:
   # This creates an ingress on an non-existing host name,
   # which binds to a service. As part of this a traefik
   # backend "error-pages" will be created, which is the one
   # we use above
   - host: error-pages
     http:
       paths:
       - backend:
         serviceName: error-pages-service
         servicePort: https
- host: frontend.domain.com
    http:
    # The configuration for your "real" Ingress goes here

# This is the service to back the ingress defined above
# Note that you can use anything for this, including an internal app
# Also: If you use https, the cert on the other side has to be valid
---
kind: Service
apiVersion: v1
metadata:
  name: error-pages-service
  namespace: default
spec:
  ports:
  - name: https
    port: 443
  type: ExternalName
  externalName: my-awesome-errors.mydomain.test

如果您使用此配置，并且您的应用程序发送了404，那么https://my-awesome-errors.mydomain.test/404.html将显示为错误页面。

Answer 2

正确的语法是：

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: frontend
  namespace: "default"
  annotations:
      external-dns.alpha.kubernetes.io/target: "domain.com"
      kubernetes.io/ingress.class: "traefik"
      traefik.ingress.kubernetes.io/error-pages: |-
        foo:
          status:
          - "404"
          backend: bar
          query: /bar
        fii:
          status:
          - "500-600"
          backend: bar
          query: /bir
spec:
  rules:
  - host: frontend.domain.com
    http:
      paths:
      - backend:
          serviceName: frontend
          servicePort: 3000
        path: /

https://docs.traefik.io/v1.6/configuration/backends/kubernetes/#general-annotations

请注意，目前，Helm Charts不支持此功能。

Answer 3

Ingress不支持你们在那里使用的注释！仅使用Service支持注释，Ingress使用主机部分。