Add jaeger_build_info metrics in each jaeger component

Signed-off-by: Ashmita Bohara <[email protected]>

cmd/agent/main.go

@@ -58,6 +58,7 @@ func main() {
 			mFactory := fork.New("internal",
 				jexpvar.NewFactory(10), // backend for internal opts
 				baseFactory)
+			version.NewInfoMetrics(mFactory)
 
 			rOpts := new(reporter.Options).InitFromViper(v, logger)
 			grpcBuilder := grpc.NewConnBuilder().InitFromViper(v)

cmd/all-in-one/main.go

@@ -86,6 +86,7 @@ by default uses only in-memory database.`,
 			metricsFactory := fork.New("internal",
 				jexpvar.NewFactory(10), // backend for internal opts
 				rootMetricsFactory.Namespace(metrics.NSOptions{Name: "jaeger"}))
+			version.NewInfoMetrics(metricsFactory)
 
 			tracerCloser := initTracer(rootMetricsFactory, svc.Logger)
 

cmd/collector/main.go

@@ -69,6 +69,7 @@ func main() {
 			metricsFactory := fork.New("internal",
 				jexpvar.NewFactory(10), // backend for internal opts
 				baseFactory.Namespace(metrics.NSOptions{Name: "collector"}))
+			version.NewInfoMetrics(metricsFactory)
 
 			storageFactory.InitFromViper(v)
 			if err := storageFactory.Initialize(baseFactory, logger); err != nil {

cmd/ingester/main.go

@@ -58,6 +58,7 @@ func main() {
 			logger := svc.Logger // shortcut
 			baseFactory := svc.MetricsFactory.Namespace(metrics.NSOptions{Name: "jaeger"})
 			metricsFactory := baseFactory.Namespace(metrics.NSOptions{Name: "ingester"})
+			version.NewInfoMetrics(metricsFactory)
 
 			storageFactory.InitFromViper(v)
 			if err := storageFactory.Initialize(baseFactory, logger); err != nil {

cmd/query/main.go

@@ -63,6 +63,7 @@ func main() {
 			logger := svc.Logger // shortcut
 			baseFactory := svc.MetricsFactory.Namespace(metrics.NSOptions{Name: "jaeger"})
 			metricsFactory := baseFactory.Namespace(metrics.NSOptions{Name: "query"})
+			version.NewInfoMetrics(metricsFactory)
 
 			traceCfg := &jaegerClientConfig.Configuration{
 				ServiceName: "jaeger-query",

pkg/version/build.go

@@ -14,6 +14,8 @@
 
 package version
 
+import "github.com/uber/jaeger-lib/metrics"
+
 var (
 	// commitFromGit is a constant representing the source version that
 	// generated this build. It should be set during build via -ldflags.
@@ -40,3 +42,23 @@ func Get() Info {
 		BuildDate:  date,
 	}
 }
+
+// InfoMetrics hold metrics about build information
+type InfoMetrics struct {
+	BuildInfo metrics.Gauge `metric:"build_info"`
+}
+
+// NewInfoMetrics returns a InfoMetrics
+func NewInfoMetrics(infoMetrics metrics.Factory) *InfoMetrics {
+	var info InfoMetrics
+
+	buildTags := map[string]string{
+		"revision": commitSHA,
+		"version": latestVersion,
+		"build_date": date,
+	}
+	metrics.Init(&info, infoMetrics, buildTags)
+	info.BuildInfo.Update(1)
+
+	return &info
+}