mirror of
https://github.com/gomods/athens
synced 2026-02-03 13:20:30 +00:00
d932d50232
* feat: add golangci-lint linting * chore: fix linter issues * feat: add linting into the workflow * docs: update lint docs * fix: cr suggestions * fix: remove old formatting and vetting scripts * fix: add docker make target * fix: action go caching * fix: depreciated actions checkout version * fix: cr suggestion * fix: cr suggestions --------- Co-authored-by: Manu Gupta <manugupt1@gmail.com>
94 lines
3.1 KiB
Go
Executable File
94 lines
3.1 KiB
Go
Executable File
package observ
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import (
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"context"
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"fmt"
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"contrib.go.opencensus.io/exporter/jaeger"
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"contrib.go.opencensus.io/exporter/stackdriver"
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datadog "github.com/DataDog/opencensus-go-exporter-datadog"
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"github.com/gomods/athens/pkg/errors"
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"go.opencensus.io/trace"
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)
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// RegisterExporter determines the type of TraceExporter service for exporting traces from opencensus
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// User can choose from multiple tracing services (datadog, jaegar)
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// RegisterExporter returns the 'Flush' function for that particular tracing service.
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func RegisterExporter(traceExporter, url, service, env string) (func(), error) {
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const op errors.Op = "observ.RegisterExporter"
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switch traceExporter {
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case "jaeger":
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return registerJaegerExporter(url, service, env)
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case "datadog":
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return registerDatadogExporter(url, service, env)
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case "stackdriver":
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return registerStackdriverExporter(url, env)
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case "":
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return nil, errors.E(op, "Exporter not specified. Traces won't be exported")
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default:
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return nil, errors.E(op, fmt.Sprintf("Exporter %s not supported. Please open PR or an issue at github.com/gomods/athens", traceExporter))
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}
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}
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// registerJaegerExporter creates a jaeger exporter for exporting traces to opencensus.
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// Currently uses the 'TraceExporter' variable in the config file.
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// It should in the future have a nice sampling rate defined.
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func registerJaegerExporter(url, service, env string) (func(), error) {
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const op errors.Op = "observ.registerJaegarExporter"
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if url == "" {
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return nil, errors.E(op, "Exporter URL is empty. Traces won't be exported")
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}
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ex, err := jaeger.NewExporter(jaeger.Options{
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Endpoint: url,
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Process: jaeger.Process{
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ServiceName: service,
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Tags: []jaeger.Tag{
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// IP Tag ensures Jaeger's clock isn't skewed.
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// If/when we have traces across different servers,
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// we should make this IP dynamic.
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jaeger.StringTag("ip", "127.0.0.1"),
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},
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},
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})
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if err != nil {
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return nil, errors.E(op, err)
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}
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traceRegisterExporter(ex, env)
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return ex.Flush, nil
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}
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func traceRegisterExporter(exporter trace.Exporter, env string) {
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trace.RegisterExporter(exporter)
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if env == "development" {
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trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
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}
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}
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// registerDatadogTracerExporter creates a datadog exporter.
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// Currently uses the 'TraceExporter' variable in the config file.
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func registerDatadogExporter(url, service, env string) (func(), error) {
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ex := datadog.NewExporter(
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datadog.Options{
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TraceAddr: url,
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Service: service,
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})
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traceRegisterExporter(ex, env)
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return ex.Stop, nil
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}
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func registerStackdriverExporter(projectID, env string) (func(), error) {
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const op errors.Op = "observ.registerStackdriverExporter"
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ex, err := stackdriver.NewExporter(stackdriver.Options{ProjectID: projectID})
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if err != nil {
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return nil, errors.E(op, err)
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}
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traceRegisterExporter(ex, env)
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return ex.Flush, nil
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}
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// StartSpan takes in a Context Interface and opName and starts a span. It returns the new attached ObserverContext
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// and span.
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func StartSpan(ctx context.Context, op string) (context.Context, *trace.Span) {
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return trace.StartSpan(ctx, op)
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}
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