[receiver/apachedruidreceiver] Add Apache Druid receiver

.github/CODEOWNERS

@@ -180,6 +180,7 @@ processor/transformprocessor/                            @open-telemetry/collect
 
 receiver/activedirectorydsreceiver/                      @open-telemetry/collector-contrib-approvers @djaglowski @BinaryFissionGames
 receiver/aerospikereceiver/                              @open-telemetry/collector-contrib-approvers @djaglowski @antonblock
+receiver/apachedruidreceiver/                            @open-telemetry/collector-contrib-approvers @atoulme @yuanlihan
 receiver/apachereceiver/                                 @open-telemetry/collector-contrib-approvers @djaglowski
 receiver/apachesparkreceiver/                            @open-telemetry/collector-contrib-approvers @djaglowski @Caleb-Hurshman @mrsillydog
 receiver/awscloudwatchmetricsreceiver/                   @open-telemetry/collector-contrib-approvers @jpkrohling

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -177,6 +177,7 @@ body:
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache
+      - receiver/apachedruid
       - receiver/apachespark
       - receiver/awscloudwatch
       - receiver/awscloudwatchmetrics

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -171,6 +171,7 @@ body:
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache
+      - receiver/apachedruid
       - receiver/apachespark
       - receiver/awscloudwatch
       - receiver/awscloudwatchmetrics

.github/ISSUE_TEMPLATE/other.yaml

@@ -171,6 +171,7 @@ body:
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache
+      - receiver/apachedruid
       - receiver/apachespark
       - receiver/awscloudwatch
       - receiver/awscloudwatchmetrics

cmd/otelcontribcol/builder-config.yaml

@@ -446,4 +446,3 @@ replaces:
   - github.com/open-telemetry/opentelemetry-collector-contrib/extension/sumologicextension => ../../extension/sumologicextension
   - github.com/open-telemetry/opentelemetry-collector-contrib/receiver/namedpipereceiver => ../../receiver/namedpipereceiver
   - github.com/open-telemetry/opentelemetry-collector-contrib/internal/sqlquery => ../../internal/sqlquery
-

receiver/apachedruidreceiver/Makefile

@@ -0,0 +1 @@
+include ../../Makefile.Common

receiver/apachedruidreceiver/README.md

@@ -0,0 +1,41 @@
+# Apache Druid Receiver
+
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Stability     | [development]: metrics   |
+| Distributions | [] |
+| Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Areceiver%2Fapachedruid%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Areceiver%2Fapachedruid) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Areceiver%2Fapachedruid%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Areceiver%2Fapachedruid) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@atoulme](https://www.github.com/atoulme), [@yuanlihan](https://www.github.com/yuanlihan) |
+
+[development]: https://github.com/open-telemetry/opentelemetry-collector#development
+<!-- end autogenerated section -->
+
+This receiver accepts [metrics](https://druid.apache.org/docs/latest/operations/metrics) data from the [HTTP Emitter](https://druid.apache.org/docs/latest/configuration/#http-emitter-module) of Apache Druid.
+
+## Prerequisites
+
+Apache Druid cluster needs to be configured to enable metrics, see [Enabling Metrics](https://druid.apache.org/docs/latest/configuration/#enabling-metrics) and the [HTTP Emitter Module](https://druid.apache.org/docs/latest/configuration/#http-emitter-module).
+
+## Configuration
+
+The following configuration options are supported:
+
+- `endpoint` (default = localhost:9000) HTTP service endpoint for the line protocol receiver
+- `metrics_path` (default = `/services/collector/metrics`) The path accepting Apache Druid metrics.
+- `logs_path` (default = `/services/collector/logs`) The path accepting Apache Druid logs.
+- `cluster_name` (default = `default`) The default name of Druid cluster. Note that the [HTTP Emitter](https://druid.apache.org/docs/latest/configuration/#http-emitter-module) of Apache Druid `28.0.0` doesn't include cluster name information in metrics.
+
+The full list of settings exposed for this receiver are documented in [config.go](config.go).
+
+Example:
+
+```yaml
+receivers:
+  apachedruid:
+    endpoint: localhost:9000
+```
+
+## Metrics
+
+Details about the metrics produced by this receiver can be found in [metadata.yaml](./metadata.yaml)

receiver/apachedruidreceiver/config.go

@@ -0,0 +1,19 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package apachedruidreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachedruidreceiver"
+
+import (
+	"go.opentelemetry.io/collector/config/confighttp"
+)
+
+// Config defines configuration for the Apache Druid receiver.
+type Config struct {
+	confighttp.ServerConfig `mapstructure:",squash"`
+
+	// MetricsPath for metrics data collection, default is '/services/collector/metrics'
+	MetricsPath string `mapstructure:"metrics_path"`
+
+	// The name of Druid cluster
+	ClusterName string `mapstructure:"cluster_name"`
+}

receiver/apachedruidreceiver/doc.go

@@ -0,0 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate mdatagen metadata.yaml
+
+package apachedruidreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachedruidreceiver"

receiver/apachedruidreceiver/factory.go

@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package apachedruidreceiver // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachedruidreceiver"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/config/confighttp"
+	"go.opentelemetry.io/collector/consumer"
+	"go.opentelemetry.io/collector/receiver"
+
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachedruidreceiver/internal/metadata"
+)
+
+func NewFactory() receiver.Factory {
+	return receiver.NewFactory(
+		metadata.Type,
+		createDefaultConfig,
+		receiver.WithMetrics(createMetricsReceiver, metadata.MetricsStability))
+}
+
+// createDefaultConfig creates the default configuration for receiver.
+func createDefaultConfig() component.Config {
+	return &Config{
+		HTTPServerSettings: confighttp.ServerConfig{
+			Endpoint: "localhost:9000",
+		},
+		MetricsPath: "/services/collector/metrics",
+		ClusterName: "default",
+	}
+}
+
+func createMetricsReceiver(_ context.Context, params receiver.CreateSettings, cfg component.Config, nextConsumer consumer.Metrics) (receiver.Metrics, error) {
+	return newMetricsReceiver(cfg.(*Config), params, nextConsumer)
+}

receiver/apachedruidreceiver/go.mod

@@ -0,0 +1,70 @@
+module github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachedruidreceiver
+
+go 1.21
+
+require (
+	github.com/open-telemetry/opentelemetry-collector-contrib/internal/common v0.90.0
+	github.com/stretchr/testify v1.9.0
+	go.opentelemetry.io/collector/component v0.90.0
+	go.opentelemetry.io/collector/config/confighttp v0.90.0
+	go.opentelemetry.io/collector/confmap v0.90.0
+	go.opentelemetry.io/collector/consumer v0.90.0
+	go.opentelemetry.io/collector/pdata v1.0.0
+	go.opentelemetry.io/collector/receiver v0.90.0
+	go.opentelemetry.io/otel/metric v1.21.0
+	go.opentelemetry.io/otel/trace v1.21.0
+	go.uber.org/goleak v1.3.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-logr/logr v1.3.0 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/hashicorp/go-version v1.6.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.17.3 // indirect
+	github.com/knadh/koanf/maps v0.1.1 // indirect
+	github.com/knadh/koanf/providers/confmap v0.1.0 // indirect
+	github.com/knadh/koanf/v2 v2.0.1 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.1-0.20220423185008-bf980b35cac4 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rs/cors v1.10.1 // indirect
+	go.opentelemetry.io/collector v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/configauth v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/configcompression v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/configopaque v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/configtelemetry v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/configtls v0.90.0 // indirect
+	go.opentelemetry.io/collector/config/internal v0.90.0 // indirect
+	go.opentelemetry.io/collector/extension v0.90.0 // indirect
+	go.opentelemetry.io/collector/extension/auth v0.90.0 // indirect
+	go.opentelemetry.io/collector/featuregate v1.3.1-0.20240315172937-3b5aee0c7a16 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.46.1 // indirect
+	go.opentelemetry.io/otel v1.21.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
+	golang.org/x/net v0.18.0 // indirect
+	golang.org/x/sys v0.14.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
+	google.golang.org/grpc v1.59.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
+
+replace github.com/open-telemetry/opentelemetry-collector-contrib/internal/common => ../../internal/common
+
+retract (
+	v0.76.2
+	v0.76.1
+	v0.65.0
+)