[#451] metrics: Move to internal

`metrics` don't look like something others want to import.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

internal/metrics/node.go

@@ -0,0 +1,118 @@
+package metrics
+
+import (
+	morphmetrics "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/metrics"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type NodeMetrics struct {
+	engine        *engineMetrics
+	state         *stateMetrics
+	replicator    *replicatorMetrics
+	objectService *objectServiceMetrics
+	treeService   *treeServiceMetrics
+	epoch         prometheus.Gauge
+	fstree        *fstreeMetrics
+	blobstore     *blobstoreMetrics
+	blobobvnizca  *blobovnicza
+	metabase      *metabaseMetrics
+	pilorama      *piloramaMetrics
+	grpc          *grpcServerMetrics
+	policer       *policerMetrics
+	morphClient   *morphClientMetrics
+	morphCache    *morphCacheMetrics
+	log           logger.LogMetrics
+}
+
+func NewNodeMetrics() *NodeMetrics {
+	return &NodeMetrics{
+		objectService: newObjectServiceMetrics(),
+		engine:        newEngineMetrics(),
+		state:         newStateMetrics(),
+		replicator:    newReplicatorMetrics(),
+		treeService:   newTreeServiceMetrics(),
+		epoch: metrics.NewGauge(prometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: innerRingSubsystem,
+			Name:      "epoch",
+			Help:      "Current epoch as seen by inner-ring node.",
+		}),
+		fstree:       newFSTreeMetrics(),
+		blobstore:    newBlobstoreMetrics(),
+		blobobvnizca: newBlobovnicza(),
+		metabase:     newMetabaseMetrics(),
+		pilorama:     newPiloramaMetrics(),
+		grpc:         newGrpcServerMetrics(),
+		policer:      newPolicerMetrics(),
+		morphClient:  newMorphClientMetrics(),
+		morphCache:   newMorphCacheMetrics(namespace),
+		log:          logger.NewLogMetrics(namespace),
+	}
+}
+
+// SetEpoch updates epoch metric.
+func (m *NodeMetrics) SetEpoch(epoch uint64) {
+	m.epoch.Set(float64(epoch))
+}
+
+func (m *NodeMetrics) TreeService() TreeMetricsRegister {
+	return m.treeService
+}
+
+func (m *NodeMetrics) Replicator() ReplicatorMetrics {
+	return m.replicator
+}
+
+func (m *NodeMetrics) ObjectService() ObjectServiceMetrics {
+	return m.objectService
+}
+
+func (m *NodeMetrics) Engine() EngineMetrics {
+	return m.engine
+}
+
+func (m *NodeMetrics) State() StateMetrics {
+	return m.state
+}
+
+func (m *NodeMetrics) FSTree() FSTreeMetrics {
+	return m.fstree
+}
+
+func (m *NodeMetrics) Blobstore() BlobstoreMetrics {
+	return m.blobstore
+}
+
+func (m *NodeMetrics) BlobobvnizcaTreeMetrics() BlobobvnizcaMetrics {
+	return m.blobobvnizca
+}
+
+func (m *NodeMetrics) MetabaseMetrics() MetabaseMetrics {
+	return m.metabase
+}
+
+func (m *NodeMetrics) PiloramaMetrics() PiloramaMetrics {
+	return m.pilorama
+}
+
+func (m *NodeMetrics) GrpcServerMetrics() GrpcServerMetrics {
+	return m.grpc
+}
+
+func (m *NodeMetrics) PolicerMetrics() PolicerMetrics {
+	return m.policer
+}
+
+func (m *NodeMetrics) MorphClientMetrics() morphmetrics.Register {
+	return m.morphClient
+}
+
+func (m *NodeMetrics) MorphCacheMetrics() MorphCacheMetrics {
+	return m.morphCache
+}
+
+func (m *NodeMetrics) LogMetrics() logger.LogMetrics {
+	return m.log
+}