controlplane: add user/instance/chunk metrics

controlplane/chunk/chunk.go

@@ -34,6 +34,8 @@ import (
 	"github.com/spacechunks/explorer/controlplane/contextkey"
 	apierrs "github.com/spacechunks/explorer/controlplane/errors"
 	"github.com/spacechunks/explorer/internal/resource"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
 )
 
 func (s *svc) CreateChunk(ctx context.Context, chunk resource.Chunk) (resource.Chunk, error) {
@@ -52,6 +54,15 @@ func (s *svc) CreateChunk(ctx context.Context, chunk resource.Chunk) (resource.C
 	if err != nil {
 		return resource.Chunk{}, err
 	}
+
+	s.metrics.createdChunksCount.Add(
+		ctx,
+		1,
+		metric.WithAttributes(
+			attribute.String("name", chunk.Name),
+			attribute.String("owner_name", chunk.Owner.Nickname),
+		),
+	)
 	return ret, nil
 }
 

controlplane/chunk/flavor_test.go

@@ -95,16 +95,18 @@ func TestCreateFlavor(t *testing.T) {
 				ctx        = context.Background()
 				mockRepo   = mock.NewMockChunkRepository(t)
 				mockAccess = mock.NewMockAuthzAccessEvaluator(t)
-				svc        = chunk.NewService(
-					slog.New(slog.NewTextHandler(os.Stdout, nil)),
-					mockRepo,
-					nil,
-					nil,
-					mockAccess,
-					chunk.Config{},
-				)
 			)
 
+			svc, err := chunk.NewService(
+				slog.New(slog.NewTextHandler(os.Stdout, nil)),
+				mockRepo,
+				nil,
+				nil,
+				mockAccess,
+				chunk.Config{},
+			)
+			require.NoError(t, err)
+
 			ctx = context.WithValue(ctx, contextkey.ActorID, "blabla")
 
 			tt.prep(mockRepo, mockAccess)
@@ -584,16 +586,18 @@ func TestCreateFlavorVersion(t *testing.T) {
 				ctx        = context.Background()
 				mockAccess = mock.NewMockAuthzAccessEvaluator(t)
 				mockRepo   = mock.NewMockChunkRepository(t)
-				svc        = chunk.NewService(
-					slog.New(slog.NewTextHandler(os.Stdout, nil)),
-					mockRepo,
-					nil,
-					nil,
-					mockAccess,
-					chunk.Config{},
-				)
 			)
 
+			svc, err := chunk.NewService(
+				slog.New(slog.NewTextHandler(os.Stdout, nil)),
+				mockRepo,
+				nil,
+				nil,
+				mockAccess,
+				chunk.Config{},
+			)
+			require.NoError(t, err)
+
 			ctx = context.WithValue(ctx, contextkey.ActorID, "blabla")
 
 			tt.prep(mockRepo, tt.newVersion, tt.prevVersion, mockAccess)

controlplane/chunk/metrics.go

@@ -0,0 +1,45 @@
+/*
+A basic matchmaking service for the Chunk Explorer.
+Copyright (C) 2026 Yannic Rieger <oss@76k.io>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+package chunk
+
+import (
+	"fmt"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+)
+
+type metrics struct {
+	createdChunksCount metric.Int64Counter
+}
+
+func initMetrics() (metrics, error) {
+	meter := otel.Meter("github.com/spacechunks/explorer/controlplane/chunk")
+
+	createdCount, err := meter.Int64Counter(
+		"explorer.control_plane.chunk.created.count",
+		metric.WithDescription("Total number of chunks created"),
+	)
+	if err != nil {
+		return metrics{}, fmt.Errorf("chunk created counter: %w", err)
+	}
+
+	return metrics{
+		createdChunksCount: createdCount,
+	}, nil
+}

controlplane/chunk/service.go

@@ -69,6 +69,7 @@ type svc struct {
 	s3Store   blob.S3Store
 	cfg       Config
 	access    authz.AccessEvaluator
+	metrics   metrics
 }
 
 func NewService(
@@ -78,13 +79,19 @@ func NewService(
 	s3Store blob.S3Store,
 	access authz.AccessEvaluator,
 	cfg Config,
-) Service {
+) (Service, error) {
+	m, err := initMetrics()
+	if err != nil {
+		return nil, err
+	}
+
 	return &svc{
 		logger:    logger,
 		repo:      repo,
 		jobClient: jobClient,
 		s3Store:   s3Store,
 		access:    access,
 		cfg:       cfg,
-	}
+		metrics:   m,
+	}, nil
 }

controlplane/instance/metrics.go

@@ -0,0 +1,45 @@
+/*
+A basic matchmaking service for the Chunk Explorer.
+Copyright (C) 2026 Yannic Rieger <oss@76k.io>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+package instance
+
+import (
+	"fmt"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+)
+
+type metrics struct {
+	instanceCreatedCount metric.Int64Counter
+}
+
+func initMetrics() (metrics, error) {
+	meter := otel.Meter("github.com/spacechunks/explorer/controlplane/instance")
+
+	createdCount, err := meter.Int64Counter(
+		"explorer.control_plane.instance.created.count",
+		metric.WithDescription("Total number of instances started"),
+	)
+	if err != nil {
+		return metrics{}, fmt.Errorf("started counter: %w", err)
+	}
+
+	return metrics{
+		instanceCreatedCount: createdCount,
+	}, nil
+}

controlplane/instance/service.go

@@ -32,6 +32,8 @@ import (
 	apierrs "github.com/spacechunks/explorer/controlplane/errors"
 	"github.com/spacechunks/explorer/controlplane/node"
 	"github.com/spacechunks/explorer/internal/resource"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
 )
 
 type Service interface {
@@ -52,15 +54,27 @@ type svc struct {
 	insRepo   Repository
 	nodeRepo  node.Repository
 	chunkRepo chunk.Repository
+	metrics   metrics
 }
 
-func NewService(logger *slog.Logger, insRepo Repository, nodeRepo node.Repository, chunkRepo chunk.Repository) Service {
+func NewService(
+	logger *slog.Logger,
+	insRepo Repository,
+	nodeRepo node.Repository,
+	chunkRepo chunk.Repository,
+) (Service, error) {
+	m, err := initMetrics()
+	if err != nil {
+		return nil, err
+	}
+
 	return &svc{
 		logger:    logger,
 		insRepo:   insRepo,
 		nodeRepo:  nodeRepo,
 		chunkRepo: chunkRepo,
-	}
+		metrics:   m,
+	}, nil
 }
 
 func (s *svc) GetInstance(ctx context.Context, id string) (resource.Instance, error) {
@@ -116,6 +130,8 @@ func (s *svc) RunFlavorVersion(
 		return resource.Instance{}, fmt.Errorf("instance id: %w", err)
 	}
 
+	version := flavor.Versions[idx]
+
 	ins, err := s.insRepo.CreateInstance(ctx, resource.Instance{
 		ID:            instanceID.String(),
 		FlavorVersion: flavor.Versions[idx],
@@ -131,6 +147,16 @@ func (s *svc) RunFlavorVersion(
 		return resource.Instance{}, fmt.Errorf("create instance: %w", err)
 	}
 
+	s.metrics.instanceCreatedCount.Add(
+		ctx,
+		1,
+		metric.WithAttributes(
+			attribute.String("flavor_name", flavor.Name),
+			attribute.String("flavor_version", version.Version),
+			attribute.String("chunk_name", ins.Chunk.Name),
+		),
+	)
+
 	return ins, nil
 }
 

controlplane/server.go

@@ -184,6 +184,40 @@ func (s *Server) Run(ctx context.Context) error {
 		return fmt.Errorf("create validator: %w", err)
 	}
 
+	insService, err := instance.NewService(s.logger, db, db, db)
+	if err != nil {
+		return fmt.Errorf("instance service: %w", err)
+	}
+
+	userService, err := user.NewService(
+		db,
+		oidcProvider,
+		s.cfg.OAuthClientID,
+		s.cfg.APITokenIssuer,
+		s.cfg.APITokenExpiry,
+		key,
+	)
+	if err != nil {
+		return fmt.Errorf("user service: %w", err)
+	}
+
+	chunkService, err := chunk.NewService(
+		s.logger.With("component", "chunk-service"),
+		db,
+		db,
+		blobStore,
+		authz.NewRuleEvaluator(db),
+		chunk.Config{
+			Registry:                     s.cfg.OCIRegistry,
+			Bucket:                       s.cfg.Bucket,
+			PresignedURLExpiry:           s.cfg.PresignedURLExpiry,
+			ThumbnailMaxSizeKB:           s.cfg.ThumbnailMaxSizeKB,
+			ChangesetTarballMaxSizeBytes: s.cfg.ChangeSetTarballMaxSizeBytes,
+		})
+	if err != nil {
+		return fmt.Errorf("chunk service: %w", err)
+	}
+
 	var (
 		grpcServer = grpc.NewServer(
 			grpc.Creds(insecure.NewCredentials()),
@@ -196,30 +230,8 @@ func (s *Server) Run(ctx context.Context) error {
 			),
 		)
 
-		userService = user.NewService(
-			db,
-			oidcProvider,
-			s.cfg.OAuthClientID,
-			s.cfg.APITokenIssuer,
-			s.cfg.APITokenExpiry,
-			key,
-		)
-		userServer   = user.NewServer(userService)
-		chunkService = chunk.NewService(
-			s.logger.With("component", "chunk-service"),
-			db,
-			db,
-			blobStore,
-			authz.NewRuleEvaluator(db),
-			chunk.Config{
-				Registry:                     s.cfg.OCIRegistry,
-				Bucket:                       s.cfg.Bucket,
-				PresignedURLExpiry:           s.cfg.PresignedURLExpiry,
-				ThumbnailMaxSizeKB:           s.cfg.ThumbnailMaxSizeKB,
-				ChangesetTarballMaxSizeBytes: s.cfg.ChangeSetTarballMaxSizeBytes,
-			})
+		userServer  = user.NewServer(userService)
 		chunkServer = chunk.NewServer(chunkService)
-		insService  = instance.NewService(s.logger, db, db, db)
 		insServer   = instance.NewServer(insService)
 	)
 

controlplane/user/metrics.go

@@ -0,0 +1,45 @@
+/*
+A basic matchmaking service for the Chunk Explorer.
+Copyright (C) 2026 Yannic Rieger <oss@76k.io>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+package user
+
+import (
+	"fmt"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/metric"
+)
+
+type metrics struct {
+	registeredCount metric.Int64Counter
+}
+
+func initMetrics() (metrics, error) {
+	meter := otel.Meter("github.com/spacechunks/explorer/controlplane/user")
+
+	registeredCount, err := meter.Int64Counter(
+		"explorer.control_plane.user.registered.count",
+		metric.WithDescription("Total number of users registered"),
+	)
+	if err != nil {
+		return metrics{}, fmt.Errorf("user registered counter: %w", err)
+	}
+
+	return metrics{
+		registeredCount: registeredCount,
+	}, nil
+}