測試環境版本：
> istio: 1.13.1
> kubernetes: v1.23.4

本次測試使用istio提供的httpsbin example

建立熔斷

circuit_breaking.yaml

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: httpbin
spec:
  host: httpbin
  trafficPolicy:
    connectionPool:
      tcp:
        maxConnections:: 1
      http:
        http1MaxPendingRequests: 1
        maxRequestsPerConnection: 1
    outlierDetection:
      consecutive5xxErrors: 1
      interval: 1s
      baseEjectionTime: 3m
      maxEjectionPercent: 100

建立熔斷規則

kubectl apply -f circuit_breaking.yaml -n sample

驗證是否建立規則

kubectl get destinationrule httpbin -o yaml -n sample

建立 client

kubectl apply -f samples/httpbin/sample-client/fortio-deploy.yaml -n sample

結果測試

export FORTIO_POD=$(kubectl get pods -n sample -l app=fortio -o 'jsonpath={.items[0].metadata.name}')
kubectl exec -n sample "$FORTIO_POD" -c fortio -- /usr/bin/fortio load -c 2 -qps 0 -n 20 -loglevel Warning http://httpbin:8000/get