[cmd/mdatagen] Remove level field from metrics (#12145)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
<!-- Issue number if applicable -->

Removes `level` field. This will be added back in the future once #11754
is completed.

#### Link to tracking issue

Updates #11061

.chloggen/mx-psi_deprecate-level-mdatagen.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: cmd/mdatagen
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove `level` field from metrics definition
+
+# One or more tracking issues or pull requests related to the change
+issues: [12145]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: This mechanism will be added back once a new views mechanism is implemented.
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

cmd/mdatagen/internal/metric.go

@@ -12,7 +12,6 @@ import (
 	"golang.org/x/text/language"
 
 	"go.opentelemetry.io/collector/component"
-	"go.opentelemetry.io/collector/config/configtelemetry"
 	"go.opentelemetry.io/collector/confmap"
 	"go.opentelemetry.io/collector/pdata/pmetric"
 )
@@ -60,11 +59,6 @@ type Metric struct {
 
 	// Attributes is the list of attributes that the metric emits.
 	Attributes []AttributeName `mapstructure:"attributes"`
-
-	// Level specifies the minimum `configtelemetry.Level` for which
-	// the metric will be emitted. This only applies to internal telemetry
-	// configuration.
-	Level configtelemetry.Level `mapstructure:"level"`
 }
 
 type Stability struct {

cmd/mdatagen/internal/telemetry.go

@@ -6,11 +6,3 @@ package internal // import "go.opentelemetry.io/collector/cmd/mdatagen/internal"
 type Telemetry struct {
 	Metrics map[MetricName]Metric `mapstructure:"metrics"`
 }
-
-func (t Telemetry) Levels() map[string]any {
-	levels := map[string]any{}
-	for _, m := range t.Metrics {
-		levels[m.Level.String()] = nil
-	}
-	return levels
-}

cmd/mdatagen/internal/templates/telemetry.go.tmpl

@@ -109,7 +109,7 @@ func NewTelemetryBuilder(settings component.TelemetrySettings, options ...Teleme
 
     {{- range $name, $metric := .Telemetry.Metrics }}
     {{- if not $metric.Optional }}
-    builder.{{ $name.Render }}, err = getLeveledMeter(builder.meter, configtelemetry.Level{{ $metric.Level }}, settings.MetricsLevel).{{ $metric.Data.Instrument }}(
+    builder.{{ $name.Render }}, err = builder.meter.{{ $metric.Data.Instrument }}(
         "otelcol_{{ $name }}",
         metric.WithDescription("{{ $metric.Description }}{{ $metric.Stability }}"),
         metric.WithUnit("{{ $metric.Unit }}"),
@@ -119,19 +119,12 @@ func NewTelemetryBuilder(settings component.TelemetrySettings, options ...Teleme
     )
     errs = errors.Join(errs, err)
     {{- if $metric.Data.Async }}
-    _, err = getLeveledMeter(builder.meter, configtelemetry.Level{{ $metric.Level }}, settings.MetricsLevel).RegisterCallback(builder.observe{{ $name.Render }}, builder.{{ $name.Render }})
+    _, err = builder.meter.RegisterCallback(builder.observe{{ $name.Render }}, builder.{{ $name.Render }})
     errs = errors.Join(errs, err)
     {{- end }}
     {{- end }}
     {{- end }}
     return &builder, errs
 }
 
-func getLeveledMeter(meter metric.Meter, cfgLevel, srvLevel configtelemetry.Level) metric.Meter {
-	if cfgLevel <= srvLevel {
-		return meter
-	}
-	return noopmetric.Meter{}
-}
-
 {{- end }}

processor/batchprocessor/batch_processor_test.go

@@ -212,7 +212,7 @@ func TestBatchProcessorSentBySize(t *testing.T) {
 	tel.AssertMetrics(t, []metricdata.Metrics{
 		{
 			Name:        "otelcol_processor_batch_batch_send_size_bytes",
-			Description: "Number of bytes in batch that was sent",
+			Description: "Number of bytes in batch that was sent. Only available on detailed level.",
 			Unit:        "By",
 			Data: metricdata.Histogram[int64]{
 				Temporality: metricdata.CumulativeTemporality,
@@ -339,7 +339,7 @@ func TestBatchProcessorSentBySizeWithMaxSize(t *testing.T) {
 	tel.AssertMetrics(t, []metricdata.Metrics{
 		{
 			Name:        "otelcol_processor_batch_batch_send_size_bytes",
-			Description: "Number of bytes in batch that was sent",
+			Description: "Number of bytes in batch that was sent. Only available on detailed level.",
 			Unit:        "By",
 			Data: metricdata.Histogram[int64]{
 				Temporality: metricdata.CumulativeTemporality,
@@ -599,7 +599,7 @@ func TestBatchMetricProcessorBatchSize(t *testing.T) {
 	tel.AssertMetrics(t, []metricdata.Metrics{
 		{
 			Name:        "otelcol_processor_batch_batch_send_size_bytes",
-			Description: "Number of bytes in batch that was sent",
+			Description: "Number of bytes in batch that was sent. Only available on detailed level.",
 			Unit:        "By",
 			Data: metricdata.Histogram[int64]{
 				Temporality: metricdata.CumulativeTemporality,
@@ -975,7 +975,7 @@ func TestBatchLogProcessor_BatchSize(t *testing.T) {
 	tel.AssertMetrics(t, []metricdata.Metrics{
 		{
 			Name:        "otelcol_processor_batch_batch_send_size_bytes",
-			Description: "Number of bytes in batch that was sent",
+			Description: "Number of bytes in batch that was sent. Only available on detailed level.",
 			Unit:        "By",
 			Data: metricdata.Histogram[int64]{
 				Temporality: metricdata.CumulativeTemporality,

processor/batchprocessor/documentation.md

@@ -16,7 +16,7 @@ Number of units in the batch
 
 ### otelcol_processor_batch_batch_send_size_bytes
 
-Number of bytes in batch that was sent
+Number of bytes in batch that was sent. Only available on detailed level.
 
 | Unit | Metric Type | Value Type |
 | ---- | ----------- | ---------- |

processor/batchprocessor/metadata.yaml

@@ -33,9 +33,8 @@ telemetry:
         value_type: int
         bucket_boundaries: [ 10, 25, 50, 75, 100, 250, 500, 750, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 20000, 30000, 50000, 100000 ]
     processor_batch_batch_send_size_bytes:
-      level: detailed
       enabled: true
-      description: Number of bytes in batch that was sent
+      description: Number of bytes in batch that was sent. Only available on detailed level.
       unit: By
       histogram:
         value_type: int