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traefik/docs/content/observability/tracing/opentelemetry.md

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---
title: "Traefik OpenTelemetry Documentation"
description: "Traefik supports several tracing backends, including OpenTelemetry. Learn how to implement it for observability in Traefik Proxy. Read the technical documentation."
---
# OpenTelemetry
Traefik Proxy follows [official OpenTelemetry semantic conventions v1.26.0](https://github.com/open-telemetry/semantic-conventions/blob/v1.26.0/docs/http/http-spans.md).
To enable the OpenTelemetry tracer:
```yaml tab="File (YAML)"
tracing:
otlp: {}
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp]
```
```bash tab="CLI"
--tracing.otlp=true
```
!!! info "Default protocol"
The OpenTelemetry trace exporter will export traces to the collector using HTTP by default to https://localhost:4318/v1/traces, see the [gRPC Section](#grpc-configuration) to use gRPC.
!!! info "Trace sampling"
By default, the OpenTelemetry trace exporter will sample 100% of traces.
See [OpenTelemetry's SDK configuration](https://opentelemetry.io/docs/reference/specification/sdk-environment-variables/#general-sdk-configuration) to customize the sampling strategy.
!!! info "Propagation"
Traefik supports the `OTEL_PROPAGATORS` env variable to set up the propragators. The supported propagators are:
- tracecontext (default)
- baggage (default)
- b3
- b3multi
- jaeger
- xray
- ottrace
Example of configuration:
OTEL_PROPAGATORS=b3,jaeger
### HTTP configuration
_Optional_
This instructs the exporter to send spans to the OpenTelemetry Collector using HTTP.
```yaml tab="File (YAML)"
tracing:
otlp:
http: {}
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.http]
```
```bash tab="CLI"
--tracing.otlp.http=true
```
#### `endpoint`
_Required, Default="http://localhost:4318/v1/traces", Format="`<scheme>://<host>:<port><path>`"_
URL of the OpenTelemetry Collector to send spans to.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
endpoint: http://localhost:4318/v1/traces
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.http]
endpoint = "http://localhost:4318/v1/traces"
```
```bash tab="CLI"
--tracing.otlp.http.endpoint=http://localhost:4318/v1/traces
```
#### `headers`
_Optional, Default={}_
Additional headers sent with traces by the exporter to the OpenTelemetry Collector.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
headers:
foo: bar
baz: buz
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.http.headers]
foo = "bar"
baz = "buz"
```
```bash tab="CLI"
--tracing.otlp.http.headers.foo=bar --tracing.otlp.http.headers.baz=buz
```
#### `tls`
_Optional_
Defines the Client TLS configuration used by the exporter to send spans to the OpenTelemetry Collector.
##### `ca`
_Optional_
`ca` is the path to the certificate authority used for the secure connection to the OpenTelemetry Collector,
it defaults to the system bundle.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
tls:
ca: path/to/ca.crt
```
```toml tab="File (TOML)"
[tracing.otlp.http.tls]
ca = "path/to/ca.crt"
```
```bash tab="CLI"
--tracing.otlp.http.tls.ca=path/to/ca.crt
```
##### `cert`
_Optional_
`cert` is the path to the public certificate used for the secure connection to the OpenTelemetry Collector.
When using this option, setting the `key` option is required.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
tls:
cert: path/to/foo.cert
key: path/to/foo.key
```
```toml tab="File (TOML)"
[tracing.otlp.http.tls]
cert = "path/to/foo.cert"
key = "path/to/foo.key"
```
```bash tab="CLI"
--tracing.otlp.http.tls.cert=path/to/foo.cert
--tracing.otlp.http.tls.key=path/to/foo.key
```
##### `key`
_Optional_
`key` is the path to the private key used for the secure connection to the OpenTelemetry Collector.
When using this option, setting the `cert` option is required.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
tls:
cert: path/to/foo.cert
key: path/to/foo.key
```
```toml tab="File (TOML)"
[tracing.otlp.http.tls]
cert = "path/to/foo.cert"
key = "path/to/foo.key"
```
```bash tab="CLI"
--tracing.otlp.http.tls.cert=path/to/foo.cert
--tracing.otlp.http.tls.key=path/to/foo.key
```
##### `insecureSkipVerify`
_Optional, Default=false_
If `insecureSkipVerify` is `true`,
the TLS connection to the OpenTelemetry Collector accepts any certificate presented by the server regardless of the hostnames it covers.
```yaml tab="File (YAML)"
tracing:
otlp:
http:
tls:
insecureSkipVerify: true
```
```toml tab="File (TOML)"
[tracing.otlp.http.tls]
insecureSkipVerify = true
```
```bash tab="CLI"
--tracing.otlp.http.tls.insecureSkipVerify=true
```
### gRPC configuration
_Optional_
This instructs the exporter to send spans to the OpenTelemetry Collector using gRPC.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc: {}
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.grpc]
```
```bash tab="CLI"
--tracing.otlp.grpc=true
```
#### `endpoint`
_Required, Default="localhost:4317", Format="`<host>:<port>`"_
Address of the OpenTelemetry Collector to send spans to.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
endpoint: localhost:4317
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.grpc]
endpoint = "localhost:4317"
```
```bash tab="CLI"
--tracing.otlp.grpc.endpoint=localhost:4317
```
#### `insecure`
_Optional, Default=false_
Allows exporter to send spans to the OpenTelemetry Collector without using a secured protocol.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
insecure: true
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.grpc]
insecure = true
```
```bash tab="CLI"
--tracing.otlp.grpc.insecure=true
```
#### `headers`
_Optional, Default={}_
Additional headers sent with traces by the exporter to the OpenTelemetry Collector.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
headers:
foo: bar
baz: buz
```
```toml tab="File (TOML)"
[tracing]
[tracing.otlp.grpc.headers]
foo = "bar"
baz = "buz"
```
```bash tab="CLI"
--tracing.otlp.grpc.headers.foo=bar --tracing.otlp.grpc.headers.baz=buz
```
#### `tls`
_Optional_
Defines the Client TLS configuration used by the exporter to send spans to the OpenTelemetry Collector.
##### `ca`
_Optional_
`ca` is the path to the certificate authority used for the secure connection to the OpenTelemetry Collector,
it defaults to the system bundle.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
tls:
ca: path/to/ca.crt
```
```toml tab="File (TOML)"
[tracing.otlp.grpc.tls]
ca = "path/to/ca.crt"
```
```bash tab="CLI"
--tracing.otlp.grpc.tls.ca=path/to/ca.crt
```
##### `cert`
_Optional_
`cert` is the path to the public certificate used for the secure connection to the OpenTelemetry Collector.
When using this option, setting the `key` option is required.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
tls:
cert: path/to/foo.cert
key: path/to/foo.key
```
```toml tab="File (TOML)"
[tracing.otlp.grpc.tls]
cert = "path/to/foo.cert"
key = "path/to/foo.key"
```
```bash tab="CLI"
--tracing.otlp.grpc.tls.cert=path/to/foo.cert
--tracing.otlp.grpc.tls.key=path/to/foo.key
```
##### `key`
_Optional_
`key` is the path to the private key used for the secure connection to the OpenTelemetry Collector.
When using this option, setting the `cert` option is required.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
tls:
cert: path/to/foo.cert
key: path/to/foo.key
```
```toml tab="File (TOML)"
[tracing.otlp.grpc.tls]
cert = "path/to/foo.cert"
key = "path/to/foo.key"
```
```bash tab="CLI"
--tracing.otlp.grpc.tls.cert=path/to/foo.cert
--tracing.otlp.grpc.tls.key=path/to/foo.key
```
##### `insecureSkipVerify`
_Optional, Default=false_
If `insecureSkipVerify` is `true`,
the TLS connection to the OpenTelemetry Collector accepts any certificate presented by the server regardless of the hostnames it covers.
```yaml tab="File (YAML)"
tracing:
otlp:
grpc:
tls:
insecureSkipVerify: true
```
```toml tab="File (TOML)"
[tracing.otlp.grpc.tls]
insecureSkipVerify = true
```
```bash tab="CLI"
--tracing.otlp.grpc.tls.insecureSkipVerify=true
```
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