loadBalancerIP: ~
  externalIPs: []
  annotations: {}

  ## service.loadBalancerSourceRanges Addresses that are allowed when service is LoadBalancer
  ## https://kubernetes.io/docs/tasks/access-application-cluster/configure-cloud-provider-firewall/#restrict-access-for-loadbalancer-service
  ##
  #loadBalancerSourceRanges:
  #   - 10.10.10.0/24
  loadBalancerSourceRanges: []

  // +optional
  repeated IngressRule rules = 3;
}

// IngressStatus describes the current state of the Ingress.
message IngressStatus {
  // loadBalancer contains the current status of the load-balancer.
  // +optional
  optional IngressLoadBalancerStatus loadBalancer = 1;
}

// IngressTLS describes the transport layer security associated with an Ingress.
message IngressTLS {

						Subsets: []*v1alpha32.Subset{
							{
								Name:   "v1",
								Labels: map[string]string{"version": "v1"},
							},
						},
						TrafficPolicy: &v1alpha32.TrafficPolicy{
							LoadBalancer: &v1alpha32.LoadBalancerSettings{
								LbPolicy: &v1alpha32.LoadBalancerSettings_Simple{Simple: v1alpha32.LoadBalancerSettings_LEAST_REQUEST},
							},

  // +optional
  repeated IngressRule rules = 3;
}

// IngressStatus describe the current state of the Ingress.
message IngressStatus {
  // loadBalancer contains the current status of the load-balancer.
  // +optional
  optional IngressLoadBalancerStatus loadBalancer = 1;
}

// IngressTLS describes the transport layer security associated with an ingress.
message IngressTLS {

  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
message ExternalMetricSource {
  // metric identifies the target metric by name and selector
  optional MetricIdentifier metric = 1;

  // target specifies the target value for the given metric

  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
// Exactly one "target" type should be set.
message ExternalMetricSource {
  // metricName is the name of the metric in question.
  optional string metricName = 1;

      #serviceAnnotations:
      #    cloud.google.com/load-balancer-type: "internal"

      podAnnotations: {}
      type: LoadBalancer #change to NodePort, ClusterIP or LoadBalancer if need be

      ##############
      secretVolumes:
      - name: ingressgateway-certs
        secretName: istio-ingressgateway-certs
        mountPath: /etc/istio/ingressgateway-certs

  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
message ExternalMetricSource {
  // metric identifies the target metric by name and selector
  optional MetricIdentifier metric = 1;

  // target specifies the target value for the given metric

      service = "app"
      rule = "PathPrefix(`/api/v1`)"
      middlewares = ["api-stripprefix"]

  [http.services]

    [http.services.app]
      [http.services.app.loadBalancer]
        [[http.services.app.loadBalancer.servers]]
          url = "http://127.0.0.1:8000"
```

这个文件配置 Traefik 使用路径前缀 `/api/v1`。

然后，它把请求重定位到运行在 `http://127.0.0.1:8000` 上的 Uvicorn。

现在，启动 Traefik：

  optional string apiVersion = 3;
}

// ExternalMetricSource indicates how to scale on a metric not associated with
// any Kubernetes object (for example length of queue in cloud
// messaging service, or QPS from loadbalancer running outside of cluster).
message ExternalMetricSource {
  // metricName is the name of the metric in question.
  optional string metricName = 1;

  // metricSelector is used to identify a specific time series