nginx - kubernetes ingress server-alias 仅适用于一台 ingress 主机

Question

根据此文档( https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#server-alias )，我可以将额外的 server_name 添加到 nginx 配置文件中。 但是，它向我的所有主机添加了额外的 server_name，这肯定会导致冲突。 有没有办法仅为我的一台主机添加服务器别名？假设我只想将 10.10.0.100 添加到我的 test1 主机。 入口示例:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
  namespace: default
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/server-alias: 10.10.0.100
spec:
  rules:
  - host: test1.com
    http:
      paths:
      - path: /
        backend:
          service:
            name: test1-service
            port:
              number: 8000
        pathType: Prefix
  - host: test2.com
    http:
      paths:
      - path: /
        backend:
          service:
            name: test2-service
            port:
              number: 8000
        pathType: Prefix

Answer 1

TL;DR

您可以将 Ingress 资源拆分到多个对象(将协同工作)上，以仅将注释添加到特定的主机。

Annotations can only be set on the whole kubernetes resource, as they are part of the resource metadata. The ingress spec doesn't include that functionality at a lower level.

-- Stackoverflow.com: Questions: Apply nginx-ingress annotations at path level

---

扩展答案以给出如何创建此类设置的示例。让我们假设(示例):

• 指向 nginx-ingress-controller 的 LoadBalancer 类型的 Service 的所有必需域:
  • hello.kubernetes.docker.internal - 用于host .spec
  • hello-two.kubernetes.docker.internal - 用于注释 .metadata
  • --
  • goodbye.kubernetes.docker.internal - 用于host .spec
  • goodbye-two.kubernetes.docker.internal - 用于注释 .metadata

跳过Deployment和Service定义，Ingress资源应如下所示:

hello-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: hello-ingress
  annotations:
    nginx.ingress.kubernetes.io/server-alias: "hello-two.kubernetes.docker.internal"
spec:
  rules:
  - host: hello.kubernetes.docker.internal # <-- IMPORTANT  
    http:
      paths:
      - path: /
        backend:
          service:
            name: hello-service
            port:
              number: 80
        pathType: Prefix

再见-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: goodbye-ingress
  annotations:
    nginx.ingress.kubernetes.io/server-alias: "goodbye-two.kubernetes.docker.internal"
spec:
  rules:
  - host: goodbye.kubernetes.docker.internal # <-- IMPORTANT 
    http:
      paths:
      - path: /
        backend:
          service:
            name: goodbye-service
            port:
              number: 80
        pathType: Prefix

以上定义将创建 2 个将被合并的 Ingress 资源:

• hello-service 将响应:
  • hello.kubernetes.docker.internal
  • hello-two.kubernetes.docker.internal
• goodbye-service 将响应:
  • 再见.kubernetes.docker.internal
  • 再见-two.kubernetes.docker.internal

运行:

• $ kubectl 获取入口:

NAME              CLASS    HOSTS                                ADDRESS     PORTS   AGE
goodbye-ingress   <none>   goodbye.kubernetes.docker.internal   localhost   80      36m
hello-ingress     <none>   hello.kubernetes.docker.internal     localhost   80      36m

---

其他资源:

• Kubernetes.io: Docs: Concepts: Services networking: Ingress
• Kubernetes.github.io: Ingress NGINX: Annotations: Server alias