fix: active http healthcheck documents a default for expected status, but doesn't use it

internal/gatewayapi/clustersettings.go

@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"math"
 	"math/big"
+	"net/http"
 	"strings"
 	"time"
 
@@ -453,6 +454,10 @@ func buildHTTPActiveHealthChecker(h *egv1a1.HTTPActiveHealthChecker) *ir.HTTPHea
 	for _, r := range h.ExpectedStatuses {
 		statusSet.Insert(int(r))
 	}
+	// If no ExpectedStatus was set, use the default value (200)
+	if statusSet.Len() == 0 {
+		statusSet.Insert(http.StatusOK)
+	}
 	irStatuses := make([]ir.HTTPStatus, 0, statusSet.Len())
 
 	for _, r := range statusSet.List() {

internal/gatewayapi/testdata/backendtrafficpolicy-with-healthcheck.in.yaml

@@ -128,6 +128,25 @@ httpRoutes:
       backendRefs:
       - name: service-3
         port: 8080
+- apiVersion: gateway.networking.k8s.io/v1
+  kind: HTTPRoute
+  metadata:
+    namespace: default
+    name: httproute-4
+  spec:
+    hostnames:
+    - gateway.envoyproxy.io
+    parentRefs:
+    - namespace: envoy-gateway
+      name: gateway-2
+      sectionName: http
+    rules:
+    - matches:
+      - path:
+          value: "/v2"
+      backendRefs:
+      - name: service-2
+        port: 8080
 backendTrafficPolicies:
 - apiVersion: gateway.envoyproxy.io/v1alpha1
   kind: BackendTrafficPolicy
@@ -197,6 +216,29 @@ backendTrafficPolicies:
         consecutiveGatewayErrors: 0
         consecutiveLocalOriginFailures: 5
         splitExternalLocalOriginErrors: false
+- apiVersion: gateway.envoyproxy.io/v1alpha1
+  kind: BackendTrafficPolicy
+  metadata:
+    namespace: default
+    name: policy-for-route-4
+  spec:
+    targetRef:
+      group: gateway.networking.k8s.io
+      kind: HTTPRoute
+      name: httproute-4
+    healthCheck:
+      active:
+        timeout: "1s"
+        interval: "5s"
+        unhealthyThreshold: 3
+        healthyThreshold: 3
+        type: HTTP
+        http:
+          path: "/healthz"
+          method: "GET"
+          expectedResponse:
+            type: Text
+            text: pong
 - apiVersion: gateway.envoyproxy.io/v1alpha1
   kind: BackendTrafficPolicy
   metadata:

internal/gatewayapi/testdata/backendtrafficpolicy-with-healthcheck.out.yaml

@@ -49,6 +49,45 @@ backendTrafficPolicies:
         status: "True"
         type: Accepted
       controllerName: gateway.envoyproxy.io/gatewayclass-controller
+- apiVersion: gateway.envoyproxy.io/v1alpha1
+  kind: BackendTrafficPolicy
+  metadata:
+    creationTimestamp: null
+    name: policy-for-route-4
+    namespace: default
+  spec:
+    healthCheck:
+      active:
+        healthyThreshold: 3
+        http:
+          expectedResponse:
+            text: pong
+            type: Text
+          method: GET
+          path: /healthz
+        interval: 5s
+        timeout: 1s
+        type: HTTP
+        unhealthyThreshold: 3
+    targetRef:
+      group: gateway.networking.k8s.io
+      kind: HTTPRoute
+      name: httproute-4
+  status:
+    ancestors:
+    - ancestorRef:
+        group: gateway.networking.k8s.io
+        kind: Gateway
+        name: gateway-2
+        namespace: envoy-gateway
+        sectionName: http
+      conditions:
+      - lastTransitionTime: null
+        message: Policy has been accepted.
+        reason: Accepted
+        status: "True"
+        type: Accepted
+      controllerName: gateway.envoyproxy.io/gatewayclass-controller
 - apiVersion: gateway.envoyproxy.io/v1alpha1
   kind: BackendTrafficPolicy
   metadata:
@@ -326,7 +365,7 @@ gateways:
       protocol: HTTP
   status:
     listeners:
-    - attachedRoutes: 3
+    - attachedRoutes: 4
       conditions:
       - lastTransitionTime: null
         message: Sending translated listener configuration to the data plane
@@ -564,6 +603,44 @@ httpRoutes:
         name: gateway-2
         namespace: envoy-gateway
         sectionName: http
+- apiVersion: gateway.networking.k8s.io/v1
+  kind: HTTPRoute
+  metadata:
+    creationTimestamp: null
+    name: httproute-4
+    namespace: default
+  spec:
+    hostnames:
+    - gateway.envoyproxy.io
+    parentRefs:
+    - name: gateway-2
+      namespace: envoy-gateway
+      sectionName: http
+    rules:
+    - backendRefs:
+      - name: service-2
+        port: 8080
+      matches:
+      - path:
+          value: /v2
+  status:
+    parents:
+    - conditions:
+      - lastTransitionTime: null
+        message: Route is accepted
+        reason: Accepted
+        status: "True"
+        type: Accepted
+      - lastTransitionTime: null
+        message: Resolved all the Object references for the Route
+        reason: ResolvedRefs
+        status: "True"
+        type: ResolvedRefs
+      controllerName: gateway.envoyproxy.io/gatewayclass-controller
+      parentRef:
+        name: gateway-2
+        namespace: envoy-gateway
+        sectionName: http
 infraIR:
   envoy-gateway/gateway-1:
     proxy:
@@ -805,6 +882,41 @@ xdsIR:
               interval: 8ms
               maxEjectionPercent: 11
               splitExternalLocalOriginErrors: false
+      - destination:
+          name: httproute/default/httproute-4/rule/0
+          settings:
+          - addressType: IP
+            endpoints:
+            - host: 7.7.7.7
+              port: 8080
+            protocol: HTTP
+            weight: 1
+        hostname: gateway.envoyproxy.io
+        isHTTP2: false
+        metadata:
+          kind: HTTPRoute
+          name: httproute-4
+          namespace: default
+        name: httproute/default/httproute-4/rule/0/match/0/gateway_envoyproxy_io
+        pathMatch:
+          distinct: false
+          name: ""
+          prefix: /v2
+        traffic:
+          healthCheck:
+            active:
+              healthyThreshold: 3
+              http:
+                expectedResponse:
+                  text: pong
+                expectedStatuses:
+                - 200
+                host: gateway.envoyproxy.io
+                method: GET
+                path: /healthz
+              interval: 5s
+              timeout: 1s
+              unhealthyThreshold: 3
       - destination:
           name: httproute/default/httproute-1/rule/0
           settings: