Openmetrics support using textparser

metricbeat/docs/fields.asciidoc

@@ -52790,10 +52790,40 @@ Openmetrics module
 
 
 
+*`openmetrics.help`*::
++
+--
+Brief description of the MetricFamily
+
+
+type: keyword
+
+--
+
+*`openmetrics.type`*::
++
+--
+Metric type
+
+
+type: keyword
+
+--
+
+*`openmetrics.unit`*::
++
+--
+Metric unit
+
+
+type: keyword
+
+--
+
 *`openmetrics.labels.*`*::
 +
 --
-Prometheus metric labels
+Openmetrics metric labels
 
 
 type: object
@@ -52803,7 +52833,27 @@ type: object
 *`openmetrics.metrics.*`*::
 +
 --
-Prometheus metric
+Openmetrics metric
+
+
+type: object
+
+--
+
+*`openmetrics.exemplar.*`*::
++
+--
+Openmetrics exemplars
+
+
+type: object
+
+--
+
+*`openmetrics.exemplar.labels.*`*::
++
+--
+Openmetrics metric exemplar labels
 
 
 type: object

metricbeat/docs/modules/openmetrics/collector.asciidoc

@@ -9,6 +9,7 @@ beta[]
 
 include::../../../module/openmetrics/collector/_meta/docs.asciidoc[]
 
+This is a default metricset. If the host module is unconfigured, this metricset is enabled by default.
 
 ==== Fields
 

metricbeat/helper/openmetrics/label.go

@@ -0,0 +1,59 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package openmetrics
+
+// LabelMap defines the mapping from OpenMetrics label to a Metricbeat field
+type LabelMap interface {
+	// GetField returns the resulting field name
+	GetField() string
+
+	// IsKey returns true if the label is a key label
+	IsKey() bool
+}
+
+// Label maps a OpenMetrics label to a Metricbeat field
+func Label(field string) LabelMap {
+	return &commonLabel{
+		field: field,
+		key:   false,
+	}
+}
+
+// KeyLabel maps a OpenMetrics label to a Metricbeat field. The label is flagged as key.
+// Metrics with the same tuple of key labels will be grouped in the same event.
+func KeyLabel(field string) LabelMap {
+	return &commonLabel{
+		field: field,
+		key:   true,
+	}
+}
+
+type commonLabel struct {
+	field string
+	key   bool
+}
+
+// GetField returns the resulting field name
+func (l *commonLabel) GetField() string {
+	return l.field
+}
+
+// IsKey returns true if the label is a key label
+func (l *commonLabel) IsKey() bool {
+	return l.key
+}