feat: add version metrics for yurt-manager and yurthub

Signed-off-by: rambohe-ch <linbo.hlb@alibaba-inc.com>

cmd/yurt-manager/app/manager.go

@@ -35,6 +35,7 @@ import (
 	"k8s.io/klog/v2/klogr"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
+	"sigs.k8s.io/controller-runtime/pkg/metrics"
 	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
 	runtimewebhook "sigs.k8s.io/controller-runtime/pkg/webhook"
 
@@ -95,6 +96,7 @@ current state towards the desired state.`,
 			if s.Generic.Version {
 				return
 			}
+			projectinfo.RegisterVersionInfo(metrics.Registry, projectinfo.GetYurtManagerName())
 
 			PrintFlags(cmd.Flags())
 

cmd/yurthub/app/start.go

@@ -62,6 +62,7 @@ func NewCmdStartYurtHub(ctx context.Context) *cobra.Command {
 				return
 			}
 			fmt.Printf("%s version: %#v\n", projectinfo.GetHubName(), projectinfo.Get())
+			projectinfo.RegisterVersionInfo(nil, projectinfo.GetHubName())
 
 			cmd.Flags().VisitAll(func(flag *pflag.Flag) {
 				klog.V(1).Infof("FLAG: --%s=%q", flag.Name, flag.Value)

pkg/projectinfo/metrics.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2024 The OpenYurt Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package projectinfo
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	yurtutil "github.com/openyurtio/openyurt/pkg/util"
+)
+
+var (
+	buildInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: "openyurt",
+			Name:      "version_info",
+			Help:      "A metric with a constant '1' value labeled by git version, git commit, build date, Go version, compiler and nodepoollabelkey from which OpenYurt was built, and platform on which it is running.",
+		},
+		[]string{"component_name", "git_version", "git_commit", "build_date", "go_version", "compiler", "platform", "nodepoollabelkey"},
+	)
+)
+
+func RegisterVersionInfo(reg prometheus.Registerer, componentName string) {
+	info := Get()
+	if yurtutil.IsNil(reg) {
+		prometheus.MustRegister(buildInfo)
+	} else {
+		reg.MustRegister(buildInfo)
+	}
+	buildInfo.WithLabelValues(componentName, info.GitVersion, info.GitCommit, info.BuildDate, info.GoVersion, info.Compiler, info.Platform, info.NodePoolLabelKey).Set(1)
+}