feat: add highest random weight in kubernetes CRD

integration/simple_test.go

@@ -1217,6 +1217,74 @@ func (s *SimpleSuite) TestMirrorCanceled() {
 	assert.Equal(s.T(), int32(0), val2)
 }
 
+func (s *SimpleSuite) TestHighestRandomWeight() {
+	var count1, count2, count3 int32
+
+	service1 := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		atomic.AddInt32(&count1, 1)
+		rw.WriteHeader(http.StatusOK)
+	}))
+
+	service2 := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		atomic.AddInt32(&count2, 1)
+		rw.WriteHeader(http.StatusOK)
+	}))
+
+	service3 := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		atomic.AddInt32(&count3, 1)
+		rw.WriteHeader(http.StatusOK)
+	}))
+
+	service1Server := service1.URL
+	service2Server := service2.URL
+	service3Server := service3.URL
+
+	file := s.adaptFile("fixtures/highest_random_weight.toml", struct {
+		Service1Server string
+		Service2Server string
+		Service3Server string
+	}{Service1Server: service1Server, Service2Server: service2Server, Service3Server: service3Server})
+
+	s.traefikCmd(withConfigFile(file))
+
+	err := try.GetRequest("http://127.0.0.1:8080/api/http/services", 3*time.Second, try.BodyContains("service1", "service2", "service3", "hrw"))
+	require.NoError(s.T(), err)
+
+	// Make 10 requests from the same client (127.0.0.1) - should all go to the same service
+	client := &http.Client{}
+	for range 10 {
+		req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/whoami", nil)
+		require.NoError(s.T(), err)
+
+		response, err := client.Do(req)
+		require.NoError(s.T(), err)
+		assert.Equal(s.T(), http.StatusOK, response.StatusCode)
+		response.Body.Close()
+	}
+
+	// Check if all requests went to the same service
+	val1 := atomic.LoadInt32(&count1)
+	val2 := atomic.LoadInt32(&count2)
+	val3 := atomic.LoadInt32(&count3)
+
+	// All requests should have been handled (total should be 10)
+	assert.Equal(s.T(), int32(10), val1+val2+val3)
+
+	// All requests from same remoteAddr (127.0.0.1) should go to exactly one service
+	servicesUsed := 0
+	if val1 > 0 {
+		servicesUsed++
+	}
+	if val2 > 0 {
+		servicesUsed++
+	}
+	if val3 > 0 {
+		servicesUsed++
+	}
+
+	assert.Equal(s.T(), 1, servicesUsed, "All requests from same remoteAddr should go to exactly one service")
+}
+
 func (s *SimpleSuite) TestSecureAPI() {
 	s.createComposeProject("base")