fix(predictkube): bump dysnix/predictkube-libs to v0.1.0, VictoriaMetrics-compatible health check

CHANGELOG.md

@@ -109,6 +109,7 @@ To learn more about active deprecations, we recommend checking [GitHub Discussio
 - **Metrics API Scaler**: Fix `aggregateFromKubeServiceEndpoints` using empty label selector that matched all EndpointSlices in the namespace instead of only the target service's ([#7641](https://github.com/kedacore/keda/issues/7641))
 - **NATS JetStream Scaler**: Return an error from `getMaxMsgLag` when the configured consumer is missing instead of falling back to the stream's last sequence, preventing incorrect scale-up to `maxReplicaCount` ([#7657](https://github.com/kedacore/keda/issues/7657))
 - **NATS JetStream Scaler**: URL-encode user input in monitoring URL construction ([#7483](https://github.com/kedacore/keda/pull/7483))
+- **PredictKube Scaler**: Bump `dysnix/predictkube-libs` to `v0.1.0` (drops the predictkube path to the archived/EOL `go-grpc-prometheus` and to the deprecated `golang/protobuf`) and use a portable Prometheus-API instant query for the health check so the scaler works against VictoriaMetrics, Thanos and other Prometheus-API-compatible backends ([#7745](https://github.com/kedacore/keda/pull/7745))
 - **Prometheus Scaler**: Handle NaN results in the same manner as Inf ([#7475](https://github.com/kedacore/keda/issues/7475))
 - **Prometheus Scaler**: Limit HTTP error response logging ([#7469](https://github.com/kedacore/keda/pull/7469))
 - **Pulsar Scaler**: Drop bearer/basic auth headers on redirects to a different host or on https->http downgrades to prevent credential leakage ([#7686](https://github.com/kedacore/keda/issues/7686))

go.mod

@@ -61,7 +61,7 @@ require (
 	github.com/beanstalkd/go-beanstalk v0.2.0
 	github.com/bradleyfalzon/ghinstallation/v2 v2.18.0
 	github.com/cloudevents/sdk-go/v2 v2.16.2
-	github.com/dysnix/predictkube-libs v0.0.4-0.20250415003622-40081ddd4983
+	github.com/dysnix/predictkube-libs v0.1.0
 	github.com/dysnix/predictkube-proto v0.0.0-20250415003810-aa0af0a0019b
 	github.com/elastic/go-elasticsearch/v7 v7.17.10
 	github.com/expr-lang/expr v1.17.8
@@ -256,7 +256,6 @@ require (
 	github.com/googleapis/gax-go/v2 v2.21.0 // indirect
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
 	github.com/grafana/regexp v0.0.0-20250905093917-f7b3be9d1853 // indirect
-	github.com/grpc-ecosystem/go-grpc-middleware v1.4.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.3 // indirect
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect

pkg/scalers/predictkube_scaler.go

@@ -393,7 +393,10 @@ func parsePredictKubeMetadata(config *scalersconfig.ScalerConfig) (result *predi
 }
 
 func (s *PredictKubeScaler) ping(ctx context.Context) (err error) {
-	_, err = s.api.Runtimeinfo(ctx)
+	// Use a portable Prometheus-API instant query rather than
+	// /api/v1/status/runtimeinfo, which is Prometheus-only and not
+	// implemented by VictoriaMetrics, M3DB, Thanos sidecar, etc.
+	_, _, err = s.api.Query(ctx, "vector(1)", time.Now())
 	return err
 }
 

pkg/scalers/predictkube_scaler_test.go

@@ -9,14 +9,14 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"sync"
 	"testing"
 	"time"
 
 	libsSrv "github.com/dysnix/predictkube-libs/external/grpc/server"
 	pb "github.com/dysnix/predictkube-proto/external/proto/services"
 	"github.com/phayes/freeport"
-	prometheusV1 "github.com/prometheus/client_golang/api/prometheus/v1"
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/grpc"
@@ -26,12 +26,21 @@ import (
 )
 
 var apiStub = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-	if r.RequestURI == "/api/v1/status/runtimeinfo" {
+	// ping() now uses an instant Prometheus query (vector(1)) instead of
+	// /api/v1/status/runtimeinfo, for VictoriaMetrics-style backend compat.
+	if strings.HasPrefix(r.RequestURI, "/api/v1/query?") || r.RequestURI == "/api/v1/query" {
 		w.WriteHeader(http.StatusOK)
-		runtimeInfo := prometheusV1.RuntimeinfoResult{
-			StartTime: time.Now(),
+		result := struct {
+			Type   model.ValueType `json:"resultType"`
+			Result interface{}     `json:"result"`
+		}{
+			Type: model.ValScalar,
+			Result: model.Scalar{
+				Value:     1,
+				Timestamp: model.Now(),
+			},
 		}
-		data, _ := json.Marshal(runtimeInfo)
+		data, _ := json.Marshal(result)
 		response := struct {
 			Data json.RawMessage `json:"data"`
 		}{
@@ -40,7 +49,7 @@ var apiStub = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r
 		_ = json.NewEncoder(w).Encode(response)
 		return
 	}
-	if r.RequestURI == "/api/v1/query_range" {
+	if r.RequestURI == "/api/v1/query_range" || strings.HasPrefix(r.RequestURI, "/api/v1/query_range?") {
 		w.WriteHeader(http.StatusOK)
 		result := struct {
 			Type   model.ValueType `json:"resultType"`