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factory.go
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factory.go
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// Copyright 2019, OpenTelemetry 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:https://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 signalfxexporter
import (
"context"
"errors"
"fmt"
"strings"
"time"
"github.com/spf13/viper"
"go.opentelemetry.io/collector/component"
otelconfig "go.opentelemetry.io/collector/config"
"go.opentelemetry.io/collector/config/configmodels"
"go.opentelemetry.io/collector/exporter/exporterhelper"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/signalfxexporter/correlation"
"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/signalfxexporter/translation"
"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/signalfxexporter/translation/dpfilters"
"github.com/open-telemetry/opentelemetry-collector-contrib/internal/splunk"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/batchperresourceattr"
)
const (
// The value of "type" key in configuration.
typeStr = "signalfx"
defaultHTTPTimeout = time.Second * 5
)
// NewFactory creates a factory for SignalFx exporter.
func NewFactory() component.ExporterFactory {
return exporterhelper.NewFactory(
typeStr,
createDefaultConfig,
exporterhelper.WithMetrics(createMetricsExporter),
exporterhelper.WithLogs(createLogsExporter),
exporterhelper.WithTraces(createTraceExporter),
exporterhelper.WithCustomUnmarshaler(customUnmarshaler),
)
}
func createDefaultConfig() configmodels.Exporter {
return &Config{
ExporterSettings: configmodels.ExporterSettings{
TypeVal: configmodels.Type(typeStr),
NameVal: typeStr,
},
TimeoutSettings: exporterhelper.TimeoutSettings{Timeout: defaultHTTPTimeout},
RetrySettings: exporterhelper.DefaultRetrySettings(),
QueueSettings: exporterhelper.DefaultQueueSettings(),
AccessTokenPassthroughConfig: splunk.AccessTokenPassthroughConfig{
AccessTokenPassthrough: true,
},
DeltaTranslationTTL: 3600,
Correlation: correlation.DefaultConfig(),
NonAlphanumericDimensionChars: "_-.",
}
}
func customUnmarshaler(componentViperSection *viper.Viper, intoCfg interface{}) (err error) {
if componentViperSection == nil {
// Nothing to do if there is no config given.
return nil
}
if err = componentViperSection.Unmarshal(intoCfg); err != nil {
return err
}
config := intoCfg.(*Config)
// If translations_config is not set in the config, set it to the defaults and return.
if !componentViperSection.IsSet(translationRulesConfigKey) {
config.TranslationRules, err = loadDefaultTranslationRules()
return err
}
return nil
}
func createTraceExporter(
_ context.Context,
params component.ExporterCreateParams,
eCfg configmodels.Exporter,
) (component.TracesExporter, error) {
cfg := eCfg.(*Config)
corrCfg := cfg.Correlation
if corrCfg.Endpoint == "" {
apiURL, err := cfg.getAPIURL()
if err != nil {
return nil, fmt.Errorf("unable to create API URL: %v", err)
}
corrCfg.Endpoint = apiURL.String()
}
if cfg.AccessToken == "" {
return nil, errors.New("access_token is required")
}
params.Logger.Info("Correlation tracking enabled", zap.String("endpoint", corrCfg.Endpoint))
tracker := correlation.NewTracker(corrCfg, cfg.AccessToken, params)
return exporterhelper.NewTraceExporter(
cfg,
params.Logger,
tracker.AddSpans,
exporterhelper.WithShutdown(tracker.Shutdown))
}
func createMetricsExporter(
_ context.Context,
params component.ExporterCreateParams,
config configmodels.Exporter,
) (component.MetricsExporter, error) {
expCfg := config.(*Config)
err := setDefaultExcludes(expCfg)
if err != nil {
return nil, err
}
exp, err := newSignalFxExporter(expCfg, params.Logger)
if err != nil {
return nil, err
}
me, err := exporterhelper.NewMetricsExporter(
expCfg,
params.Logger,
exp.pushMetrics,
// explicitly disable since we rely on http.Client timeout logic.
exporterhelper.WithTimeout(exporterhelper.TimeoutSettings{Timeout: 0}),
exporterhelper.WithRetry(expCfg.RetrySettings),
exporterhelper.WithQueue(expCfg.QueueSettings))
if err != nil {
return nil, err
}
// If AccessTokenPassthrough enabled, split the incoming Metrics data by splunk.SFxAccessTokenLabel,
// this ensures that we get batches of data for the same token when pushing to the backend.
if expCfg.AccessTokenPassthrough {
me = &baseMetricsExporter{
Component: me,
MetricsConsumer: batchperresourceattr.NewBatchPerResourceMetrics(splunk.SFxAccessTokenLabel, me),
}
}
return &signalfMetadataExporter{
MetricsExporter: me,
pushMetadata: exp.pushMetadata,
}, nil
}
func loadDefaultTranslationRules() ([]translation.Rule, error) {
config := Config{}
v := otelconfig.NewViper()
v.SetConfigType("yaml")
v.ReadConfig(strings.NewReader(translation.DefaultTranslationRulesYaml))
err := v.UnmarshalExact(&config)
if err != nil {
return nil, fmt.Errorf("failed to load default translation rules: %v", err)
}
return config.TranslationRules, nil
}
// setDefaultExcludes appends default metrics to be excluded to the exclude_metrics option.
func setDefaultExcludes(cfg *Config) error {
defaultExcludeMetrics, err := loadDefaultExcludes()
if err != nil {
return err
}
if cfg.ExcludeMetrics == nil || len(cfg.ExcludeMetrics) > 0 {
cfg.ExcludeMetrics = append(cfg.ExcludeMetrics, defaultExcludeMetrics...)
}
return nil
}
func loadDefaultExcludes() ([]dpfilters.MetricFilter, error) {
config := Config{}
v := otelconfig.NewViper()
v.SetConfigType("yaml")
v.ReadConfig(strings.NewReader(translation.DefaultExcludeMetricsYaml))
err := v.UnmarshalExact(&config)
if err != nil {
return nil, fmt.Errorf("failed to load default exclude metrics: %v", err)
}
return config.ExcludeMetrics, nil
}
func createLogsExporter(
_ context.Context,
params component.ExporterCreateParams,
cfg configmodels.Exporter,
) (component.LogsExporter, error) {
expCfg := cfg.(*Config)
exp, err := newEventExporter(expCfg, params.Logger)
if err != nil {
return nil, err
}
le, err := exporterhelper.NewLogsExporter(
expCfg,
params.Logger,
exp.pushLogs,
// explicitly disable since we rely on http.Client timeout logic.
exporterhelper.WithTimeout(exporterhelper.TimeoutSettings{Timeout: 0}),
exporterhelper.WithRetry(expCfg.RetrySettings),
exporterhelper.WithQueue(expCfg.QueueSettings))
if err != nil {
return nil, err
}
// If AccessTokenPassthrough enabled, split the incoming Metrics data by splunk.SFxAccessTokenLabel,
// this ensures that we get batches of data for the same token when pushing to the backend.
if expCfg.AccessTokenPassthrough {
le = &baseLogsExporter{
Component: le,
LogsConsumer: batchperresourceattr.NewBatchPerResourceLogs(splunk.SFxAccessTokenLabel, le),
}
}
return le, nil
}