kubernetes 中的 traefik 入口自定义错误

Question

我需要在 kubernetes 的 traefik 入口中设置自定义错误，以便在没有端点或状态为“404”或“[500-600]”时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 ingress 文件中的文档中的注释（注意：这是在 values.yaml 文件中将注释作为 yaml 传递的 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 的回答是正确的，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，traefik后端必须通过kubernetes进行配置。您不能在配置文件中创建后端并将其与 kubernetes 一起使用，至少不能在 traefik 1.6.x 中使用

这是完整的东西的样子。 foo 只是一个名称，如另一个答案中所述，可以是任何名称：

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，并且您的应用发送 404，则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！ 只有 Service 支持注解，Ingress 正在使用主机部分。