rate_limit-advanced,yaml

apiVersion: "config.istio.io/v1alpha2"
kind: rule
metadata:
  name: quota
  namespace: istio-system
spec:
  actions:
  - handler: handler.memquota
    instances:
    - requestcount.quota
  match: match(request.headers["cookie"], "user=tester") == false

rate_limit.yaml

apiVersion: "config.istio.io/v1alpha2"
kind: memquota
metadata:
  name: handler
  namespace: istio-system
spec:
  quotas:
  - name: requestcount.quota.istio-system
    maxAmount: 200
    validDuration: 1s
    overrides:
    - dimensions:
        destination: reviews
      maxAmount: 4
      validDuration: 5s

rate_limit.yaml: Memquota 規定 reviews 服務在 5 秒內最多能被訪問 4 次

Istio 速率限制可以讓 普通用戶在使用reviews 服務時，只被提供免費的 quota，若超過免費 quota 的請求，則被限制。
rate_limit-advanced,yaml