k8s configured to support a large number of merchant custom domain name

Based on nginx -> traefik -> k8s architecture, an application needs to support a large number of business any custom domain name, Zezheng it? Application of this scenario we encountered on the company k8s, so the research under the following two scenarios:

Scenario 1, the most direct and brutal but very lowB program, ingress listed for each domain name

# more ingress.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: zhanghao-custom
  annotations:
    kubernetes.io/ingress.class: traefik
spec:
  rules:
  - host: aa.xx.com
    http:
      paths:
        - path: /service
          backend:
            serviceName: zhanghao-gateway-www
            servicePort: http
        - path: /
          backend:
            serviceName: zhanghao-web
            servicePort: http
  - host: bb.yy.com
    http:
      paths:
        - path: /service
          backend:
            serviceName: zhanghao-gateway-www
            servicePort: http
        - path: /
          backend:
            serviceName: zhanghao-web

            servicePort: http

Each new domain name, we must modify ingress, can not be accepted.

Method 2: traefik new entryPoint, ingress at the request of wild entryPoint

nginx control of non-custom domain name to go traefik_normal, custom domain name to go zhanghao_custom

upstream traefik_normal {
  server traefik_server1:80;
  server traefik_server2:80;
}
upstream zhanghao_custom {
  server traefik_server1:81;
  server traefik_server2:81;
}

traefik default is all requests go entryPoints: http (80 ports), add a custom domain name entryPoints: zhanghao-custom (81 ports)

# more traefik.toml
defaultEntryPoints = ["http"]
[entryPoints]
    [entryPoints.http]
        address = ":80"

    [entryPoints.zhanghao-custom]
        address = ":81"

ingress custom domain annotations provided by walking entryPoints: zhanghao-custom (81 ports); not specified host, receive requests all domain names;

Add custom domain configuration does not need to move, once and for all

# more ingress.yaml 
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: zhanghao-custom
  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/frontend-entry-points: zhanghao-custom
spec:
  rules:
  - http:
      paths:
      - path: /service
        backend:
          serviceName: zhanghao-gateway-www
          servicePort: http
      - path: /
        backend:
          serviceName: zhanghao-web
          servicePort: http

traefik effect is as follows:

over!