feat(exporters): replace opencensus with opentelemetry

cmd/nodeproblemdetector/node_problem_detector.go

@@ -18,6 +18,7 @@ package main
 
 import (
 	"context"
+	"time"
 
 	"k8s.io/klog/v2"
 
@@ -29,7 +30,9 @@ import (
 	"k8s.io/node-problem-detector/pkg/exporters/prometheusexporter"
 	"k8s.io/node-problem-detector/pkg/problemdaemon"
 	"k8s.io/node-problem-detector/pkg/problemdetector"
+	"k8s.io/node-problem-detector/pkg/problemmetrics"
 	"k8s.io/node-problem-detector/pkg/types"
+	otelutil "k8s.io/node-problem-detector/pkg/util/otel"
 	"k8s.io/node-problem-detector/pkg/version"
 )
 
@@ -43,13 +46,7 @@ func npdMain(ctx context.Context, npdo *options.NodeProblemDetectorOptions) erro
 	npdo.SetConfigFromDeprecatedOptionsOrDie()
 	npdo.ValidOrDie()
 
-	// Initialize problem daemons.
-	problemDaemons := problemdaemon.NewProblemDaemons(npdo.MonitorConfigPaths)
-	if len(problemDaemons) == 0 {
-		klog.Fatalf("No problem daemon is configured")
-	}
-
-	// Initialize exporters.
+	// Initialize exporters first to set up the OpenTelemetry readers.
 	defaultExporters := []types.Exporter{}
 	if ke := k8sexporter.NewExporterOrDie(ctx, npdo); ke != nil {
 		defaultExporters = append(defaultExporters, ke)
@@ -59,9 +56,28 @@ func npdMain(ctx context.Context, npdo *options.NodeProblemDetectorOptions) erro
 		defaultExporters = append(defaultExporters, pe)
 		klog.Info("Prometheus exporter started.")
 	}
-
 	plugableExporters := exporters.NewExporters()
 
+	// Initialize OpenTelemetry meter provider with all registered readers
+	// This must be called after all exporters have been created and registered their readers
+	meterProvider := otelutil.InitializeMeterProvider()
+	defer func() {
+		// Drop the cancellation of ctx because it is likely already canceled
+		// at shutdown, which would prevent flushing pending metrics.
+		shutdownCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 10*time.Second)
+		defer cancel()
+		if err := meterProvider.Shutdown(shutdownCtx); err != nil {
+			klog.Errorf("Failed to shut down OpenTelemetry meter provider: %v", err)
+		}
+	}()
+	problemmetrics.InitializeGlobalProblemMetricsManager()
+
+	// Initialize problem daemons.
+	problemDaemons := problemdaemon.NewProblemDaemons(npdo.MonitorConfigPaths)
+	if len(problemDaemons) == 0 {
+		klog.Fatalf("No problem daemon is configured")
+	}
+
 	npdExporters := []types.Exporter{}
 	npdExporters = append(npdExporters, defaultExporters...)
 	npdExporters = append(npdExporters, plugableExporters...)

go.mod

@@ -4,27 +4,31 @@ go 1.26.5
 
 require (
 	cloud.google.com/go/compute/metadata v0.9.0
-	contrib.go.opencensus.io/exporter/prometheus v0.4.2
-	contrib.go.opencensus.io/exporter/stackdriver v0.13.14
+	cloud.google.com/go/monitoring v1.24.3
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/metric v0.55.0
 	github.com/acobaugh/osrelease v0.1.0
 	github.com/avast/retry-go/v4 v4.7.0
 	github.com/coreos/go-systemd/v22 v22.6.0
 	github.com/euank/go-kmsg-parser v2.0.0+incompatible
 	github.com/hpcloud/tail v1.0.0
+	github.com/prometheus/client_golang v1.23.2
 	github.com/prometheus/client_model v0.6.2
 	github.com/prometheus/common v0.67.5
 	github.com/prometheus/otlptranslator v1.0.0
 	github.com/prometheus/procfs v0.20.1
 	github.com/shirou/gopsutil/v4 v4.25.12
 	github.com/spf13/pflag v1.0.10
 	github.com/stretchr/testify v1.11.1
-	go.opencensus.io v0.24.0
 	go.opentelemetry.io/otel v1.44.0
 	go.opentelemetry.io/otel/exporters/prometheus v0.66.0
+	go.opentelemetry.io/otel/metric v1.44.0
+	go.opentelemetry.io/otel/sdk v1.44.0
 	go.opentelemetry.io/otel/sdk/metric v1.44.0
 	golang.org/x/sys v0.46.0
 	google.golang.org/api v0.272.0
+	google.golang.org/genproto/googleapis/api v0.0.0-20260319201613-d00831a3d3e7
+	google.golang.org/grpc v1.79.3
+	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af
 	k8s.io/api v0.35.7
 	k8s.io/apimachinery v0.35.7
 	k8s.io/client-go v0.35.7
@@ -35,20 +39,14 @@ require (
 require (
 	cloud.google.com/go/auth v0.18.2 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
-	cloud.google.com/go/monitoring v1.24.3 // indirect
-	cloud.google.com/go/trace v1.11.7 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.55.0 // indirect
-	github.com/aws/aws-sdk-go v1.44.72 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/ebitengine/purego v0.9.1 // indirect
 	github.com/emicklei/go-restful/v3 v3.12.2 // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
-	github.com/go-kit/log v0.2.1 // indirect
-	github.com/go-logfmt/logfmt v0.5.1 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect
@@ -66,33 +64,24 @@ require (
 	github.com/go-openapi/swag/stringutils v0.25.5 // indirect
 	github.com/go-openapi/swag/typeutils v0.25.5 // indirect
 	github.com/go-openapi/swag/yamlutils v0.25.5 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/gnostic-models v0.7.0 // indirect
 	github.com/google/s2a-go v0.1.9 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.14 // indirect
 	github.com/googleapis/gax-go/v2 v2.18.0 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
-	github.com/prometheus/client_golang v1.23.2 // indirect
-	github.com/prometheus/prometheus v0.311.3 // indirect
-	github.com/prometheus/statsd_exporter v0.22.7 // indirect
 	github.com/tklauser/go-sysconf v0.3.16 // indirect
 	github.com/tklauser/numcpus v0.11.0 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.63.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.67.0 // indirect
-	go.opentelemetry.io/otel/metric v1.44.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.44.0 // indirect
 	go.opentelemetry.io/otel/trace v1.44.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
@@ -104,15 +93,11 @@ require (
 	golang.org/x/text v0.39.0 // indirect
 	golang.org/x/time v0.15.0 // indirect
 	google.golang.org/genproto v0.0.0-20260217215200-42d3e9bedb6d // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20260319201613-d00831a3d3e7 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260311181403-84a4fc48630c // indirect
-	google.golang.org/grpc v1.79.3 // indirect
-	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.13.0 // indirect
 	gopkg.in/fsnotify.v1 v1.4.7 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect