httproute-defaultbackend.md

DefaultBackend

• HTTPRoute支持当后端服务返回错误码在ErrorCode中时，请求重定向到DefaultService

• DefaultBackend位于HTTPRoute的Spec.Routes[0].Rules[0].DefaultBackend

字段	类型	必填	描述	示例
Service	*DefaultService	否	指向Serivce配置
ErrorCode	[int]	否	错误码	[503, 501]

DefaultService

字段	类型	必填	描述	示例
Name	string	否	service名称	default
Port	*int32	否	service端口	80

示例

• HTTPRoute

apiVersion: proxy.bocloud.io/v1beta1
kind: HTTPRoute
metadata:
  name: httproute-defaultserver
spec:
  ingressClassName: nginx
  routes:
    - host: defaultserver.demo.com
      protocol: http
      rules:
        - path: /user
          pathType: exact
          backends:
            - name: service
              port: 80
          defaultBackend:
            service:
              name: default
              port: 8080
            errorCode: [501, 503]

• nginx.conf

	## start server defaultserver.demo.com
	server {
		server_name defaultserver.demo.com ;
		
		listen 80  ;
		listen [::]:80  ;
		listen 443  ssl http2 ;
		listen [::]:443  ssl http2 ;
		
		location @custom_custom-default-backend-default-default_501 {
			internal;
			proxy_intercept_errors off;
			proxy_set_header       X-Code             501;
			proxy_set_header       X-Format           $http_accept;
			proxy_set_header       X-Original-URI     $request_uri;
			proxy_set_header       Host               $best_http_host;
			set $proxy_upstream_name "custom-default-backend-default-default";
			rewrite                (.*) / break;
			proxy_pass            http://upstream_balancer;
		}
		
		location @custom_custom-default-backend-default-default_503 {
			internal;
			proxy_intercept_errors off;
			proxy_set_header       X-Code             503;
			proxy_set_header       X-Format           $http_accept;
			proxy_set_header       X-Original-URI     $request_uri;
			proxy_set_header       Host               $best_http_host;
			set $proxy_upstream_name "custom-default-backend-default-default";
			rewrite                (.*) / break;
			proxy_pass            http://upstream_balancer;
		}
		
		location = /user {			
			error_page 501 = @custom_custom-default-backend-default-default_501;
			error_page 503 = @custom_custom-default-backend-default-default_503;
			proxy_pass http://upstream_balancer;	
		}
	}

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