流量治理的原理 —— VirutalService —— HTTPMatchRequest

HttpMatchRequest specifies a set of criterion to be met in order for the rule to be applied to the HTTP request. For example, the following restricts the rule to match only requests where the URL path starts with /ratings/v2/ and the request contains a custom end-user header with value jason.

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings-route
spec:
  hosts:
  - ratings.prod.svc.cluster.local
  http:
  - match:
    - headers:
        end-user:
          exact: jason
      uri:
        prefix: "/ratings/v2/"
      ignoreUriCase: true
    route:
    - destination:
        host: ratings.prod.svc.cluster.local

HTTPMatchRequest CANNOT be empty. Note:

1. If a root VirtualService have matched any property (path, header etc.) by regex, delegate VirtualServices should not have any other matches on the same property.
2. If a delegate VirtualService have matched any property (path, header etc.) by regex, root VirtualServices should not have any other matches on the same property.