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add support for otel in env variable #663

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Merged
reflog merged 1 commit into from
Nov 24, 2025
Merged

add support for otel in env variable #663

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18 changes: 14 additions & 4 deletions http_proxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -78,9 +78,19 @@ import (
const (
timeoutToDialOriginSite = 10 * time.Second

teleportHost = "telemetry.iantem.io:443"
defaultTeleportHost = "telemetry.iantem.io:443"
)

// getTelemetryEndpoint returns the OTEL endpoint to use for telemetry.
// It checks the OTEL_EXPORTER_OTLP_ENDPOINT environment variable first,
// falling back to the default if not set.
func getTelemetryEndpoint() string {
if endpoint := os.Getenv("OTEL_EXPORTER_OTLP_ENDPOINT"); endpoint != "" {
return endpoint
}
return defaultTeleportHost
}

var (
log = golog.LoggerFor("lantern-proxy")

Expand Down Expand Up @@ -594,7 +604,7 @@ func (p *Proxy) createFilterChain(bl *blacklist.Blacklist) (filters.Chain, proxy

func (p *Proxy) configureTeleportProxiedBytes() func() {
log.Debug("Configuring Teleport proxied bytes")
tp, stop := otel.BuildTracerProvider(p.buildOTELOpts(teleportHost, true))
tp, stop := otel.BuildTracerProvider(p.buildOTELOpts(getTelemetryEndpoint(), true))
if tp != nil {
go p.instrument.ReportProxiedBytesPeriodically(1*time.Hour, tp)
ogStop := stop
Expand All @@ -609,7 +619,7 @@ func (p *Proxy) configureTeleportProxiedBytes() func() {
func (p *Proxy) configureTeleportOriginBytes() func() {
log.Debug("Configuring Teleport origin bytes")
// Note - we do not include the proxy name here to avoid associating origin site usage with devices on that proxy name
tp, stop := otel.BuildTracerProvider(p.buildOTELOpts(teleportHost, false))
tp, stop := otel.BuildTracerProvider(p.buildOTELOpts(getTelemetryEndpoint(), false))
if tp != nil {
go p.instrument.ReportOriginBytesPeriodically(1*time.Hour, tp)
ogStop := stop
Expand All @@ -624,7 +634,7 @@ func (p *Proxy) configureTeleportOriginBytes() func() {
func (p *Proxy) configureOTELMetrics() (func(), error) {
return otel.InitGlobalMeterProvider(
p.buildOTELOpts(
teleportHost,
getTelemetryEndpoint(),
false, // don't include proxy name in order to reduce DataDog costs
))
}
Expand Down
25 changes: 21 additions & 4 deletions otel/otel.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ package otel

import (
"context"
"strings"
"time"

sdkotel "go.opentelemetry.io/otel"
Expand Down Expand Up @@ -88,10 +89,18 @@ func (opts *Opts) buildResource() *resource.Resource {

func BuildTracerProvider(opts *Opts) (*sdktrace.TracerProvider, func()) {
// Create HTTP client to talk to OTEL collector
client := otlptracehttp.NewClient(
clientOpts := []otlptracehttp.Option{
otlptracehttp.WithEndpoint(opts.Endpoint),
otlptracehttp.WithHeaders(opts.Headers),
)
}

// If endpoint doesn't use port 443, assume insecure (HTTP not HTTPS)
if !strings.Contains(opts.Endpoint, ":443") {
log.Debugf("Using insecure connection for OTEL endpoint %v", opts.Endpoint)
clientOpts = append(clientOpts, otlptracehttp.WithInsecure())
}

client := otlptracehttp.NewClient(clientOpts...)

// Create an exporter that exports to the OTEL collector
exporter, err := otlptrace.New(context.Background(), client)
Expand Down Expand Up @@ -127,7 +136,7 @@ func BuildTracerProvider(opts *Opts) (*sdktrace.TracerProvider, func()) {
}

func InitGlobalMeterProvider(opts *Opts) (func(), error) {
exp, err := otlpmetrichttp.New(context.Background(),
metricOpts := []otlpmetrichttp.Option{
otlpmetrichttp.WithEndpoint(opts.Endpoint),
otlpmetrichttp.WithHeaders(opts.Headers),
otlpmetrichttp.WithTemporalitySelector(func(kind sdkmetric.InstrumentKind) metricdata.Temporality {
Expand All @@ -142,7 +151,15 @@ func InitGlobalMeterProvider(opts *Opts) (func(), error) {
return metricdata.CumulativeTemporality
}
}),
)
}

// If endpoint doesn't use port 443, assume insecure (HTTP not HTTPS)
if !strings.Contains(opts.Endpoint, ":443") {
log.Debugf("Using insecure connection for OTEL metrics endpoint %v", opts.Endpoint)
metricOpts = append(metricOpts, otlpmetrichttp.WithInsecure())
}

exp, err := otlpmetrichttp.New(context.Background(), metricOpts...)
if err != nil {
return nil, err
}
Expand Down
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