helloserver-max-pending-req envoy filter

destination rule

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: helloserver-mesh-max-pending
  namespace: asm-test
spec:
  workloadSelector:
    matchLabels:
      app: helloserver
  host: hellosvc.asm-test.svc.cluster.local
  trafficPolicy:
    connectionPool:
      http:
        http1MaxPendingRequests: 1

gistfile1.txt

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: helloserver-max-pending-req
  namespace: asm-test
spec:
  workloadSelector:
    labels:
      app: helloserver
  configPatches:
  - applyTo: CLUSTER
    match:
      context: SIDECAR_INBOUND
      cluster:
        portNumber: 8080
        name: "inbound|8080||"
    patch:
      operation: MERGE
      value:
        circuit_breakers:
          thresholds:
            - max_pending_requests: 1