feat(self-monitoring): add self-monitoring for manager

Dockerfile

@@ -7,6 +7,11 @@ WORKDIR /workspace
 # Copy the Go Modules manifests
 COPY go.mod go.mod
 COPY go.sum go.sum
+
+# This particular COPY needs to be executed before go mod download since it is referenced by a replace directive
+# in go.mod.
+COPY images/pkg/common/ images/pkg/common/
+
 # cache deps before building and copying source so that we don't need to re-download as much
 # and so that source changes don't invalidate our downloaded layer
 RUN go mod download

cmd/main.go

@@ -16,6 +16,7 @@ import (
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
 
 	"github.com/go-logr/logr"
+	otelmetric "go.opentelemetry.io/otel/metric"
 	appsv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -32,6 +33,7 @@ import (
 	k8swebhook "sigs.k8s.io/controller-runtime/pkg/webhook"
 
 	dash0v1alpha1 "github.com/dash0hq/dash0-operator/api/dash0monitoring/v1alpha1"
+	"github.com/dash0hq/dash0-operator/images/pkg/common"
 	"github.com/dash0hq/dash0-operator/internal/backendconnection"
 	"github.com/dash0hq/dash0-operator/internal/backendconnection/otelcolresources"
 	"github.com/dash0hq/dash0-operator/internal/dash0/controller"
@@ -76,11 +78,18 @@ const (
 
 	//nolint
 	mandatoryEnvVarMissingMessageTemplate = "cannot start the Dash0 operator, the mandatory environment variable \"%s\" is missing"
+
+	meterName = "dash0.operator.manager"
 )
 
 var (
 	scheme   = runtime.NewScheme()
 	setupLog = ctrl.Log.WithName("setup")
+
+	metricNamePrefix = fmt.Sprintf("%s.", meterName)
+
+	meter                 otelmetric.Meter
+	otelShutdownFunctions []func(ctx context.Context) error
 )
 
 func init() {
@@ -158,6 +167,8 @@ func main() {
 		TLSOpts: tlsOpts,
 	})
 
+	meter, otelShutdownFunctions = common.InitOTelSdk(ctx, meterName)
+
 	if err := startOperatorManager(
 		ctx,
 		metricsAddr,
@@ -252,7 +263,7 @@ func startOperatorManager(
 		developmentMode,
 	)
 
-	err = startDash0Controller(ctx, mgr, clientset, envVars, developmentMode)
+	err = startDash0Controllers(ctx, mgr, clientset, envVars, developmentMode)
 	if err != nil {
 		return err
 	}
@@ -270,6 +281,9 @@ func startOperatorManager(
 	if err = mgr.Start(ctrl.SetupSignalHandler()); err != nil {
 		return fmt.Errorf("unable to set up the signal handler: %w", err)
 	}
+	// ^mgr.Start(...) blocks. It only returns when the manager is terminating.
+
+	common.ShutDownOTelSdk(ctx, otelShutdownFunctions)
 
 	return nil
 }
@@ -354,7 +368,7 @@ func readOptionalPullPolicyFromEnvironmentVariable(envVarName string) corev1.Pul
 	return ""
 }
 
-func startDash0Controller(
+func startDash0Controllers(
 	ctx context.Context,
 	mgr manager.Manager,
 	clientset *kubernetes.Clientset,
@@ -427,6 +441,11 @@ func startDash0Controller(
 	if err := operatorConfigurationReconciler.SetupWithManager(mgr); err != nil {
 		return fmt.Errorf("unable to set up the operator configuration reconciler: %w", err)
 	}
+	operatorConfigurationReconciler.InitializeSelfMonitoringMetrics(
+		meter,
+		metricNamePrefix,
+		&setupLog,
+	)
 
 	monitoringReconciler := &controller.Dash0Reconciler{
 		Client:                   k8sClient,
@@ -436,10 +455,14 @@ func startDash0Controller(
 		Images:                   images,
 		OperatorNamespace:        envVars.operatorNamespace,
 	}
-
 	if err := monitoringReconciler.SetupWithManager(mgr); err != nil {
 		return fmt.Errorf("unable to set up the monitoring reconciler: %w", err)
 	}
+	monitoringReconciler.InitializeSelfMonitoringMetrics(
+		meter,
+		metricNamePrefix,
+		&setupLog,
+	)
 
 	if os.Getenv("ENABLE_WEBHOOK") != "false" {
 		if err := (&webhook.Handler{

go.mod

@@ -1,10 +1,11 @@
 module github.com/dash0hq/dash0-operator
 
-go 1.22.0
+go 1.22.4
 
-toolchain go1.22.4
+toolchain go1.22.6
 
 require (
+	github.com/dash0hq/dash0-operator/images/pkg/common v0.0.0-00010101000000-000000000000
 	github.com/go-logr/logr v1.4.2
 	github.com/google/go-cmp v0.6.0
 	github.com/google/uuid v1.6.0
@@ -21,12 +22,14 @@ require (
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/emicklei/go-restful/v3 v3.12.1 // indirect
 	github.com/evanphx/json-patch/v5 v5.9.0 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-logr/zapr v1.3.0 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
 	github.com/go-openapi/jsonreference v0.21.0 // indirect
@@ -38,6 +41,7 @@ require (
 	github.com/google/gnostic-models v0.6.8 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/pprof v0.0.0-20240827171923-fa2c70bbbfe5 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0 // indirect
 	github.com/imdario/mergo v0.3.16 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
@@ -52,18 +56,27 @@ require (
 	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
+	go.opentelemetry.io/otel v1.29.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.29.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.29.0 // indirect
+	go.opentelemetry.io/otel/metric v1.29.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.29.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.29.0 // indirect
+	go.opentelemetry.io/otel/trace v1.29.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
 	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/oauth2 v0.21.0 // indirect
+	golang.org/x/oauth2 v0.22.0 // indirect
 	golang.org/x/sys v0.24.0 // indirect
 	golang.org/x/term v0.23.0 // indirect
 	golang.org/x/text v0.17.0 // indirect
 	golang.org/x/time v0.5.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.4.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240822170219-fc7c04adadcd // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240822170219-fc7c04adadcd // indirect
 	google.golang.org/grpc v1.65.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
@@ -75,3 +88,5 @@ require (
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )
+
+replace github.com/dash0hq/dash0-operator/images/pkg/common => ./images/pkg/common

go.sum

@@ -1,5 +1,7 @@
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -16,8 +18,11 @@ github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nos
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/fxamacker/cbor/v2 v2.7.0 h1:iM5WgngdRBanHcxugY4JySA0nk1wZorNOpTgCMedv5E=
 github.com/fxamacker/cbor/v2 v2.7.0/go.mod h1:pxXPTn3joSm21Gbwsv0w9OSA2y1HFR9qXEeXQVeNoDQ=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
 github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-logr/zapr v1.3.0 h1:XGdV8XW8zdwFiwOA2Dryh1gj2KRQyOOoNmBy4EplIcQ=
 github.com/go-logr/zapr v1.3.0/go.mod h1:YKepepNBd1u/oyhd/yQmtjVXmm9uML4IXUgMOwR8/Gg=
 github.com/go-openapi/jsonpointer v0.21.0 h1:YgdVicSA9vH5RiHs9TZW5oyafXZFc6+2Vc1rr/O9oNQ=
@@ -46,6 +51,8 @@ github.com/google/pprof v0.0.0-20240827171923-fa2c70bbbfe5 h1:5iH8iuqE5apketRbSF
 github.com/google/pprof v0.0.0-20240827171923-fa2c70bbbfe5/go.mod h1:vavhavw2zAxS5dIdcRluK6cSGGPlZynqzFM8NdvU144=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0 h1:asbCHRVmodnJTuQ3qamDwqVOIjwqUPTYmYuemVOx+Ys=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.22.0/go.mod h1:ggCgvZ2r7uOoQjOyu2Y1NhHmEPPzzuhWgcza5M1Ji1I=
 github.com/imdario/mergo v0.3.16 h1:wwQJbIsHYGMUyLSPrEq1CT16AhnhNJQ51+4fdHUnCl4=
 github.com/imdario/mergo v0.3.16/go.mod h1:WBLT9ZmE3lPoWsEzCh9LPo3TiwVN+ZKEjmz+hD27ysY=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
@@ -98,6 +105,22 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.opentelemetry.io/collector/pdata v1.14.1 h1:wXZjtQA7Vy5HFqco+yA95ENyMQU5heBB1IxMHQf6mUk=
 go.opentelemetry.io/collector/pdata v1.14.1/go.mod h1:z1dTjwwtcoXxZx2/nkHysjxMeaxe9pEmYTEr4SMNIx8=
+go.opentelemetry.io/otel v1.29.0 h1:PdomN/Al4q/lN6iBJEN3AwPvUiHPMlt93c8bqTG5Llw=
+go.opentelemetry.io/otel v1.29.0/go.mod h1:N/WtXPs1CNCUEx+Agz5uouwCba+i+bJGFicT8SR4NP8=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.29.0 h1:k6fQVDQexDE+3jG2SfCQjnHS7OamcP73YMoxEVq5B6k=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.29.0/go.mod h1:t4BrYLHU450Zo9fnydWlIuswB1bm7rM8havDpWOJeDo=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.29.0 h1:xvhQxJ/C9+RTnAj5DpTg7LSM1vbbMTiXt7e9hsfqHNw=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.29.0/go.mod h1:Fcvs2Bz1jkDM+Wf5/ozBGmi3tQ/c9zPKLnsipnfhGAo=
+go.opentelemetry.io/otel/metric v1.29.0 h1:vPf/HFWTNkPu1aYeIsc98l4ktOQaL6LeSoeV2g+8YLc=
+go.opentelemetry.io/otel/metric v1.29.0/go.mod h1:auu/QWieFVWx+DmQOUMgj0F8LHWdgalxXqvp7BII/W8=
+go.opentelemetry.io/otel/sdk v1.29.0 h1:vkqKjk7gwhS8VaWb0POZKmIEDimRCMsopNYnriHyryo=
+go.opentelemetry.io/otel/sdk v1.29.0/go.mod h1:pM8Dx5WKnvxLCb+8lG1PRNIDxu9g9b9g59Qr7hfAAok=
+go.opentelemetry.io/otel/sdk/metric v1.29.0 h1:K2CfmJohnRgvZ9UAj2/FhIf/okdWcNdBwe1m8xFXiSY=
+go.opentelemetry.io/otel/sdk/metric v1.29.0/go.mod h1:6zZLdCl2fkauYoZIOn/soQIDSWFmNSRcICarHfuhNJQ=
+go.opentelemetry.io/otel/trace v1.29.0 h1:J/8ZNK4XgR7a21DZUAsbF8pZ5Jcw1VhACmnYt39JTi4=
+go.opentelemetry.io/otel/trace v1.29.0/go.mod h1:eHl3w0sp3paPkYstJOmAimxhiFXPg+MMTlEh3nsQgWQ=
+go.opentelemetry.io/proto/otlp v1.3.1 h1:TrMUixzpM0yuc/znrFTP9MMRh8trP93mkCiDVeXrui0=
+go.opentelemetry.io/proto/otlp v1.3.1/go.mod h1:0X1WI4de4ZsLrrJNLAQbFeLCm3T7yBkR0XqQ7niQU+8=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
@@ -117,8 +140,8 @@ golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
 golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
-golang.org/x/oauth2 v0.21.0 h1:tsimM75w1tF/uws5rbeHzIWxEqElMehnc+iW793zsZs=
-golang.org/x/oauth2 v0.21.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.22.0 h1:BzDx2FehcG7jJwgWLELCdmLuxk2i+x9UDpSiss2u0ZA=
+golang.org/x/oauth2 v0.22.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -147,8 +170,10 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gomodules.xyz/jsonpatch/v2 v2.4.0 h1:Ci3iUJyx9UeRx7CeFN8ARgGbkESwJK+KB9lLcWxY/Zw=
 gomodules.xyz/jsonpatch/v2 v2.4.0/go.mod h1:AH3dM2RI6uoBZxn3LVrfvJ3E0/9dG4cSrbuBJT4moAY=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 h1:BwIjyKYGsK9dMCBOorzRri8MQwmi7mT9rGHsCEinZkA=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
+google.golang.org/genproto/googleapis/api v0.0.0-20240822170219-fc7c04adadcd h1:BBOTEWLuuEGQy9n1y9MhVJ9Qt0BDu21X8qZs71/uPZo=
+google.golang.org/genproto/googleapis/api v0.0.0-20240822170219-fc7c04adadcd/go.mod h1:fO8wJzT2zbQbAjbIoos1285VfEIYKDDY+Dt+WpTkh6g=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240822170219-fc7c04adadcd h1:6TEm2ZxXoQmFWFlt1vNxvVOa1Q0dXFQD1m/rYjXmS0E=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240822170219-fc7c04adadcd/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
 google.golang.org/grpc v1.65.0 h1:bs/cUb4lp1G5iImFFd3u5ixQzweKizoZJAwBNLR42lc=
 google.golang.org/grpc v1.65.0/go.mod h1:WgYC2ypjlB0EiQi6wdKixMqukr6lBc0Vo+oOgjrM5ZQ=
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=

helm-chart/dash0-operator/templates/operator/deployment-and-webhook.yaml

@@ -121,6 +121,14 @@ spec:
         - name: DASH0_DEVELOPMENT_MODE
           value: {{ .Values.operator.developmentMode | toString | quote }}
         {{- end }}
+        - name: K8S_NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        - name: K8S_POD_UID
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.uid
         ports:
         - containerPort: 9443
           name: webhook-server

helm-chart/dash0-operator/tests/operator/__snapshot__/deployment-and-webhook_test.yaml.snap

@@ -56,6 +56,14 @@ deployment should match snapshot (default values):
                   value: ghcr.io/dash0hq/configuration-reloader:0.0.0
                 - name: DASH0_FILELOG_OFFSET_SYNCH_IMAGE
                   value: ghcr.io/dash0hq/filelog-offset-synch:0.0.0
+                - name: K8S_NODE_NAME
+                  valueFrom:
+                    fieldRef:
+                      fieldPath: spec.nodeName
+                - name: K8S_POD_UID
+                  valueFrom:
+                    fieldRef:
+                      fieldPath: metadata.uid
               image: ghcr.io/dash0hq/operator-controller:0.0.0
               livenessProbe:
                 httpGet:

helm-chart/dash0-operator/tests/operator/deployment-and-webhook_test.yaml

@@ -302,8 +302,14 @@ tests:
       - equal:
           path: spec.template.spec.containers[0].env[7].value
           value: ghcr.io/dash0hq/filelog-offset-synch@sha256:4e8c25853217c7393dbd95e17fe2117bb31b39478bbea4479cc5e7c1257dda04
-      - notExists:
+      - equal:
           path: spec.template.spec.containers[0].env[8].name
+          value: K8S_NODE_NAME
+      - equal:
+          path: spec.template.spec.containers[0].env[9].name
+          value: K8S_POD_UID
+      - notExists:
+          path: spec.template.spec.containers[0].env[10].name
 
   - it: webhook should have caBundle set
     documentSelector:

images/configreloader/src/configreloader.go

@@ -72,7 +72,7 @@ func main() {
 	signal.Notify(shutdown, syscall.SIGTERM)
 
 	meter, selfMonitoringShutdownFunctions := common.InitOTelSdk(ctx, meterName)
-	setUpSelfMonitoringMetrics(meter)
+	initializeSelfMonitoringMetrics(meter)
 
 	go func() {
 		for {
@@ -234,7 +234,7 @@ func triggerConfigurationReload(collectorPid OTelColPid) error {
 	return nil
 }
 
-func setUpSelfMonitoringMetrics(meter otelmetric.Meter) {
+func initializeSelfMonitoringMetrics(meter otelmetric.Meter) {
 	var err error
 
 	if configFilesChangesMetric, err = meter.Int64Counter(

images/filelogoffsetsynch/src/filelogoffsetsynch.go

@@ -109,7 +109,7 @@ func main() {
 	}
 
 	meter, selfMonitoringShutdownFunctions := common.InitOTelSdk(ctx, meterName)
-	setUpSelfMonitoringMetrics(meter)
+	initializeSelfMonitoringMetrics(meter)
 
 	// creates the clientset
 	clientset, err := kubernetes.NewForConfig(config)
@@ -393,7 +393,7 @@ func tarFile(writer *tar.Writer, path string, info os.FileInfo) (HasAddedFileToA
 	return true, nil
 }
 
-func setUpSelfMonitoringMetrics(meter otelmetric.Meter) {
+func initializeSelfMonitoringMetrics(meter otelmetric.Meter) {
 	var err error
 
 	if updateSizeMetric, err = meter.Int64Gauge(

images/pkg/common/otel.go

@@ -80,6 +80,8 @@ func InitOTelSdk(
 		// Actually, the trace SDK does that correctly, but the metric SDK does not.
 		// - https://github.com/open-telemetry/opentelemetry-go/blob/932a4d8a5f2536645618d7aee8e5da6b8e3b6751/sdk/trace/provider.go#L353
 		// - https://github.com/open-telemetry/opentelemetry-go/blob/932a4d8a5f2536645618d7aee8e5da6b8e3b6751/sdk/metric/config.go#L106
+		//
+		// Reported here: https://github.com/open-telemetry/opentelemetry-go/issues/5764
 		finalResource, err := resource.Merge(resource.Environment(), resourceWithPodAndNode)
 		if err != nil {
 			log.Fatalf("Cannot merge the OpenTelemetry resource: %v", err)