diff --git a/otelcollector/config.go b/otelcollector/config.go new file mode 100644 index 00000000..04e9fb03 --- /dev/null +++ b/otelcollector/config.go @@ -0,0 +1,29 @@ +// Copyright The Prometheus Authors +// Licensed 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 otelcollector + +import "fmt" + +type Config struct { + DisableDefaults bool + EnableCollectors []string + ExcludeCollectors []string +} + +func (c Config) Validate() error { + if len(c.EnableCollectors) > 0 && len(c.ExcludeCollectors) > 0 { + return fmt.Errorf("%q and %q can't be used at the same time", "EnableCollectors", "ExcludeCollectors") + } + return nil +} diff --git a/otelcollector/doc.go b/otelcollector/doc.go new file mode 100644 index 00000000..8f6115dd --- /dev/null +++ b/otelcollector/doc.go @@ -0,0 +1,19 @@ +// Copyright The Prometheus Authors +// Licensed 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 otelcollector implements the OpenTelemetry Collector receiver interface +// for the Prometheus Node Exporter. +// +// Use this go module to embed the Prometheus Node Exporter in your OpenTelemetry Collector +// using OCB (OpenTelemetry Collector Builder). +package otelcollector \ No newline at end of file diff --git a/otelcollector/exporter.go b/otelcollector/exporter.go new file mode 100644 index 00000000..55393efd --- /dev/null +++ b/otelcollector/exporter.go @@ -0,0 +1,64 @@ +// Copyright The Prometheus Authors +// Licensed 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 otelcollector + +import ( + "context" + "errors" + + "github.com/prometheus/client_golang/prometheus" + versioncollector "github.com/prometheus/client_golang/prometheus/collectors/version" + "github.com/prometheus/exporter-toolkit/otlpreceiver" +) + +type NodeExporter struct { + config *Config + registry *prometheus.Registry +} + +func NewNodeExporter(config *Config) *NodeExporter { + return &NodeExporter{ + config: config, + registry: prometheus.NewRegistry(), + } +} + +func (ne *NodeExporter) Initialize(ctx context.Context, cfg otlpreceiver.Config) (*prometheus.Registry, error) { + var exporterCfg *Config + + if cfg != nil { + var ok bool + exporterCfg, ok = cfg.(*Config) + if !ok { + return nil, errors.New("error reading configuration") + } + } else { + // Use default configuration when none is provided + exporterCfg = &Config{ + DisableDefaults: false, + EnableCollectors: []string{}, + ExcludeCollectors: []string{}, + } + } + + ne.registry.MustRegister(versioncollector.NewCollector("node_exporter")) + + ne.config = exporterCfg + return ne.registry, nil +} + +func (ne *NodeExporter) Shutdown(_ context.Context) error { + // There's nothing special needed to shutdown node-exporter. + return nil +} diff --git a/otelcollector/factory.go b/otelcollector/factory.go new file mode 100644 index 00000000..11fb805c --- /dev/null +++ b/otelcollector/factory.go @@ -0,0 +1,36 @@ +// Copyright The Prometheus Authors +// Licensed 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 otelcollector + +import ( + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/receiver" + + "github.com/prometheus/exporter-toolkit/otlpreceiver" +) + +func NewFactory() receiver.Factory { + defaults := map[string]interface{}{ + "disable_defaults": false, + "enable_collectors": []string{}, + "exclude_collectors": []string{}, + } + + return otlpreceiver.NewFactory( + otlpreceiver.WithType(component.MustNewType("prometheus_node_exporter")), + otlpreceiver.WithInitializer(NewNodeExporter(&Config{})), + otlpreceiver.WithConfigUnmarshaler(&ConfigUnmarshaler{}), + otlpreceiver.WithComponentDefaults(defaults), + ) +} \ No newline at end of file diff --git a/otelcollector/go.mod b/otelcollector/go.mod new file mode 100644 index 00000000..6e0979fe --- /dev/null +++ b/otelcollector/go.mod @@ -0,0 +1,48 @@ +module github.com/prometheus/node_exporter/otel_collector + +go 1.25.0 + +require ( + github.com/prometheus/client_golang v1.23.2 + github.com/prometheus/exporter-toolkit v0.0.0-00010101000000-000000000000 + go.opentelemetry.io/collector/component v1.44.0 + go.opentelemetry.io/collector/receiver v1.44.0 +) + +require ( + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/go-logr/logr v1.4.3 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/hashicorp/go-version v1.7.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/prometheus/client_model v0.6.2 // indirect + github.com/prometheus/common v0.66.1 // indirect + github.com/prometheus/procfs v0.16.1 // indirect + go.opentelemetry.io/auto/sdk v1.1.0 // indirect + go.opentelemetry.io/collector/consumer v1.44.0 // indirect + go.opentelemetry.io/collector/featuregate v1.44.0 // indirect + go.opentelemetry.io/collector/internal/telemetry v0.138.0 // indirect + go.opentelemetry.io/collector/pdata v1.44.0 // indirect + go.opentelemetry.io/collector/pipeline v1.44.0 // indirect + go.opentelemetry.io/contrib/bridges/otelzap v0.13.0 // indirect + go.opentelemetry.io/otel v1.38.0 // indirect + go.opentelemetry.io/otel/log v0.14.0 // indirect + go.opentelemetry.io/otel/metric v1.38.0 // indirect + go.opentelemetry.io/otel/trace v1.38.0 // indirect + go.uber.org/multierr v1.11.0 // indirect + go.uber.org/zap v1.27.0 // indirect + go.yaml.in/yaml/v2 v2.4.3 // indirect + golang.org/x/net v0.45.0 // indirect + golang.org/x/sys v0.37.0 // indirect + golang.org/x/text v0.30.0 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20250825161204-c5933d9347a5 // indirect + google.golang.org/grpc v1.76.0 // indirect + google.golang.org/protobuf v1.36.10 // indirect +) + +replace github.com/prometheus/exporter-toolkit => ../../exporter-toolkit diff --git a/otelcollector/go.sum b/otelcollector/go.sum new file mode 100644 index 00000000..00f973b6 --- /dev/null +++ b/otelcollector/go.sum @@ -0,0 +1,153 @@ +github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM= +github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw= +github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= +github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A= 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h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/otelcollector/unmarshaler.go b/otelcollector/unmarshaler.go new file mode 100644 index 00000000..fe402374 --- /dev/null +++ b/otelcollector/unmarshaler.go @@ -0,0 +1,35 @@ +// Copyright The Prometheus Authors +// Licensed 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 otelcollector + +import "github.com/prometheus/exporter-toolkit/otlpreceiver" + +type ConfigUnmarshaler struct{} + +func (u *ConfigUnmarshaler) UnmarshalExporterConfig(data map[string]interface{}) (otlpreceiver.Config, error) { + cfg := &Config{} + + if disableDefaults, ok := data["disable_defaults"].(bool); ok { + cfg.DisableDefaults = disableDefaults + } + + if enabledCollector, ok := data["enable_collectors"].([]string); ok { + cfg.EnableCollectors = enabledCollector + } + + if excludedCollectors, ok := data["exclude_collectors"].([]string); ok { + cfg.ExcludeCollectors = excludedCollectors + } + return cfg, nil +}