Metrics

Traefik provides metrics in the OpenTelemetry format as well as the following vendor specific backends:

• Datadog
• InfluxDB2
• Prometheus
• StatsD

Traefik Proxy has an official Grafana dashboard for both on-premises and Kubernetes deployments.

---

Open Telemetry

Default protocol

The OpenTelemetry exporter will export metrics to the collector using HTTP by default to https://localhost:4318/v1/metrics.

Configuration Example

To enable the OpenTelemetry metrics:

File (YAML)

metrics:
  otlp: {}

File (TOML)

[metrics]
  [metrics.otlp]

CLI

--metrics.otlp=true

Helm Chart Values

# values.yaml
metrics:
  # Disable Prometheus (enabled by default)
  prometheus: null
  # Enable providing OTel metrics
  otlp:
    enabled: true
    http:
      enabled: true

Helm Chart Configuration

Traefik can be configured to provide metrics in the OpenTelemetry format using the Helm Chart values. To know more about the Helm Chart options, refer to the Helm Chart (Find options metrics.otlp).

Configuration Options

Field	Description	Default	Required
metrics.addInternals	Enables metrics for internal resources (e.g.: ping@internal).	false	No
metrics.otlp.addEntryPointsLabels	Enable metrics on entry points.	true	No
metrics.otlp.addRoutersLabels	Enable metrics on routers.	false	No
metrics.otlp.addServicesLabels	Enable metrics on services.	true	No
metrics.otlp.explicitBoundaries	Explicit boundaries for Histogram data points.	".005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10"	No
metrics.otlp.pushInterval	Interval at which metrics are sent to the OpenTelemetry Collector.	10s	No
metrics.otlp.http	This instructs the exporter to send the metrics to the OpenTelemetry Collector using HTTP. Setting the sub-options with their default values.	null/false	No
metrics.otlp.http.endpoint	URL of the OpenTelemetry Collector to send metrics to. Format="<scheme>://<host>:<port><path>"	"http://localhost:4318/v1/metrics"	Yes
metrics.otlp.http.headers	Additional headers sent with metrics by the exporter to the OpenTelemetry Collector.	-	No
metrics.otlp.http.tls.ca	Path to the certificate authority used for the secure connection to the OpenTelemetry Collector, it defaults to the system bundle.	""	No
metrics.otlp.http.tls.cert	Path to the public certificate used for the secure connection to the OpenTelemetry Collector. When using this option, setting the key option is required.	""	No
metrics.otlp.http.tls.key	This instructs the exporter to send the metrics to the OpenTelemetry Collector using HTTP. Setting the sub-options with their default values.	null/false	No
metrics.otlp.http.tls.insecureskipverify	Allow the TLS connection to the OpenTelemetry Collector accepts any certificate presented by the server regardless of the hostnames it covers.	false	Yes
metrics.otlp.grpc	This instructs the exporter to send metrics to the OpenTelemetry Collector using gRPC.	null/false	No
metrics.otlp.grpc.endpoint	Address of the OpenTelemetry Collector to send metrics to. Format="<host>:<port>"	"localhost:4317"	Yes
metrics.otlp.grpc.headers	Additional headers sent with metrics by the exporter to the OpenTelemetry Collector.	-	No
metrics.otlp.http.grpc.insecure	Allows exporter to send metrics to the OpenTelemetry Collector without using a secured protocol.	false	Yes
metrics.otlp.grpc.tls.ca	Path to the certificate authority used for the secure connection to the OpenTelemetry Collector, it defaults to the system bundle.	-	No
metrics.otlp.grpc.tls.cert	Path to the public certificate used for the secure connection to the OpenTelemetry Collector. When using this option, setting the key option is required.	-	No
metrics.otlp.grpc.tls.key	This instructs the exporter to send the metrics to the OpenTelemetry Collector using HTTP. Setting the sub-options with their default values.	null/false	No
metrics.otlp.grpc.tls.insecureskipverify	Allow the TLS connection to the OpenTelemetry Collector accepts any certificate presented by the server regardless of the hostnames it covers.	false	Yes

Vendors

Datadog

Configuration Example

To enable the Datadog:

File (YAML)

metrics:
  datadog: {}

File (TOML)

[metrics]
  [metrics.datadog]

CLI

--metrics.datadog=true

Configuration Options

Field	Description	Default	Required
metrics.addInternals	Enables metrics for internal resources (e.g.: ping@internal).	false	No
datadog.address	Defines the address for the exporter to send metrics to datadog-agent. More information here	127.0.0.1:8125	Yes
datadog.addEntryPointsLabels	Enable metrics on entry points.	true	No
datadog.addRoutersLabels	Enable metrics on routers.	false	No
datadog.addServicesLabels	Enable metrics on services.	true	No
datadog.pushInterval	Defines the interval used by the exporter to push metrics to datadog-agent.	10s	No
datadog.prefix	Defines the prefix to use for metrics collection.	"traefik"	No

address

Address instructs exporter to send metrics to datadog-agent at this address.

This address can be a Unix Domain Socket (UDS) in the following format: unix:///path/to/datadog.socket. When the prefix is set to unix, the socket type will be automatically determined. To explicitly define the socket type and avoid automatic detection, you can use the prefixes unixgram for SOCK_DGRAM (datagram sockets) and unixstream for SOCK_STREAM (stream sockets), respectively.

File (YAML)

metrics:
  datadog:
    address: 127.0.0.1:8125

File (TOML)

[metrics]
  [metrics.datadog]
    address = "127.0.0.1:8125"

CLI

--metrics.datadog.address=127.0.0.1:8125

InfluxDB v2

Configuration Example

To enable the InfluxDB2:

File (YAML)

metrics:
  influxDB2:
    address: http://localhost:8086

File (TOML)

[metrics]
  [metrics.influxDB2]
    address: http://localhost:8086

CLI

--metrics.influxdb2=true

Configuration Options

Field	Description	Default	Required
metrics.addInternal	Enables metrics for internal resources (e.g.: ping@internal).	false	No
metrics.influxDB2.addEntryPointsLabels	Enable metrics on entry points.	true	No
metrics.influxDB2.addRoutersLabels	Enable metrics on routers.	false	No
metrics.influxDB2.addServicesLabels	Enable metrics on services.	true	No
metrics.influxDB2.additionalLabels	Additional labels (InfluxDB tags) on all metrics.	-	No
metrics.influxDB2.pushInterval	The interval used by the exporter to push metrics to InfluxDB server.	10s	No
metrics.influxDB2.address	Address of the InfluxDB v2 instance.	"http://localhost:8086"	Yes
metrics.influxDB2.token	Token with which to connect to InfluxDB v2.	-	Yes
metrics.influxDB2.org	Organisation where metrics will be stored.	-	Yes
metrics.influxDB2.bucket	Bucket where metrics will be stored.	-	Yes

Prometheus

Configuration Example

To enable the Prometheus:

File (YAML)

metrics:
  prometheus:
    buckets:
      - 0.1
      - 0.3
      - 1.2
      - 5.0

File (TOML)

[metrics]
  [metrics.prometheus]
    [metrics.prometheus.buckets]
      - 0.1
      - 0.3
      - 1.2
      - 5.0

CLI

--metrics.prometheus=true

Configuration Options

Field	Description	Default	Required
metrics.prometheus.addInternals	Enables metrics for internal resources (e.g.: ping@internals).	false	No
metrics.prometheus.addEntryPointsLabels	Enable metrics on entry points.	true	No
metrics.prometheus.addRoutersLabels	Enable metrics on routers.	false	No
metrics.prometheus.addServicesLabels	Enable metrics on services.	true	No
metrics.prometheus.buckets	Buckets for latency metrics.	"0.100000, 0.300000, 1.200000, 5.000000"	No
metrics.prometheus.manualRouting	Set to true, it disables the default internal router in order to allow creating a custom router for the prometheus@internal service.	false	No
metrics.prometheus.entryPoint	Traefik Entrypoint name used to expose metrics.	"traefik"	No
metrics.prometheus.headerLabels	Defines extra labels extracted from request headers for the requests_total metrics. More information here.		Yes

headerLabels

Defines the extra labels for the requests_total metrics, and for each of them, the request header containing the value for this label. If the header is not present in the request it will be added nonetheless with an empty value. The label must be a valid label name for Prometheus metrics, otherwise, the Prometheus metrics provider will fail to serve any Traefik-related metric.

How to provide the Host header value

The Host header is never present in the Header map of a request, as per go documentation says:

// For incoming requests, the Host header is promoted to the
// Request.Host field and removed from the Header map.

As a workaround, to obtain the Host of a request as a label, use instead the X-Forwarded-Host header.

Configuration Example

Here is an example of the entryPoint requests_total metric with an additional "useragent" label.

When configuring the label in Static Configuration:

Configuration

# static_configuration.yaml
metrics:
  prometheus:
    headerLabels:
      useragent: User-Agent

Request

curl -H "User-Agent: foobar" http://localhost

Metric

traefik_entrypoint_requests_total\{code="200",entrypoint="web",method="GET",protocol="http",useragent="foobar"\} 1

StatsD

Configuration Example

To enable the Statsd:

File (YAML)

metrics:
  statsD:
    address: localhost:8125

File (TOML)

[metrics]
  [metrics.statsD]
    address: localhost:8125

CLI

--metrics.statsd=true

Configuration Options

Field	Description	Default	Required
metrics.addInternals	Enables metrics for internal resources (e.g.: ping@internals).	false	No
metrics.statsD.addEntryPointsLabels	Enable metrics on entry points.	true	No
metrics.statsD.addRoutersLabels	Enable metrics on routers.	false	No
metrics.statsD.addServicesLabels	Enable metrics on services.	true	No
metrics.statsD.pushInterval	The interval used by the exporter to push metrics to DataDog server.	10s	No
metrics.statsD.address	Address instructs exporter to send metrics to statsd at this address.	"127.0.0.1:8125"	Yes
metrics.statsD.prefix	The prefix to use for metrics collection.	"traefik"	No

Metrics Provided

Global Metrics

OpenTelemetry

Metric	Type	Labels	Description
traefik_config_reloads_total	Count		The total count of configuration reloads.
traefik_config_last_reload_success	Gauge		The timestamp of the last configuration reload success.
traefik_open_connections	Gauge	entrypoint, protocol	The current count of open connections, by entrypoint and protocol.
traefik_tls_certs_not_after	Gauge		The expiration date of certificates.

Prometheus

Metric	Type	Labels	Description
traefik_config_reloads_total	Count		The total count of configuration reloads.
traefik_config_last_reload_success	Gauge		The timestamp of the last configuration reload success.
traefik_open_connections	Gauge	entrypoint, protocol	The current count of open connections, by entrypoint and protocol.
traefik_tls_certs_not_after	Gauge		The expiration date of certificates.

Datadog

Metric	Type	Labels	Description
config.reload.total	Count		The total count of configuration reloads.
config.reload.lastSuccessTimestamp	Gauge		The timestamp of the last configuration reload success.
open.connections	Gauge	entrypoint, protocol	The current count of open connections, by entrypoint and protocol.
tls.certs.notAfterTimestamp	Gauge		The expiration date of certificates.

InfluxDB2

Metric	Type	Labels	Description
traefik.config.reload.total	Count		The total count of configuration reloads.
traefik.config.reload.lastSuccessTimestamp	Gauge		The timestamp of the last configuration reload success.
traefik.open.connections	Gauge	entrypoint, protocol	The current count of open connections, by entrypoint and protocol.
traefik.tls.certs.notAfterTimestamp	Gauge		The expiration date of certificates.

StatsD

Metric	Type	Labels	Description
{prefix}.config.reload.total	Count		The total count of configuration reloads.
{prefix}.config.reload.lastSuccessTimestamp	Gauge		The timestamp of the last configuration reload success.
{prefix}.open.connections	Gauge	entrypoint, protocol	The current count of open connections, by entrypoint and protocol.
{prefix}.tls.certs.notAfterTimestamp	Gauge		The expiration date of certificates.

{prefix} Default Value

By default, {prefix} value is traefik.

Labels

Here is a comprehensive list of labels that are provided by the global metrics:

Label	Description	example
entrypoint	Entrypoint that handled the connection	"example_entrypoint"
protocol	Connection protocol	"TCP"

OpenTelemetry Semantic Conventions

Traefik Proxy follows official OpenTelemetry semantic conventions v1.23.1.

HTTP Server

Metric	Type	Labels	Description
http.server.request.duration	Histogram	error.type, http.request.method, http.response.status_code, network.protocol.name, server.address, server.port, url.scheme	Duration of HTTP server requests

Labels

Here is a comprehensive list of labels that are provided by the metrics:

Label	Description	example
error.type	Describes a class of error the operation ended with	"500"
http.request.method	HTTP request method	"GET"
http.response.status_code	HTTP response status code	"200"
network.protocol.name	OSI application layer or non-OSI equivalent	"http/1.1"
network.protocol.version	Version of the protocol specified in network.protocol.name	"1.1"
server.address	Name of the local HTTP server that received the request	"example.com"
server.port	Port of the local HTTP server that received the request	"80"
url.scheme	The URI scheme component identifying the used protocol	"http"

HTTP Client

Metric	Type	Labels	Description
http.client.request.duration	Histogram	error.type, http.request.method, http.response.status_code, network.protocol.name, server.address, server.port, url.scheme	Duration of HTTP client requests

Labels

Here is a comprehensive list of labels that are provided by the metrics:

Label	Description	example
error.type	Describes a class of error the operation ended with	"500"
http.request.method	HTTP request method	"GET"
http.response.status_code	HTTP response status code	"200"
network.protocol.name	OSI application layer or non-OSI equivalent	"http/1.1"
network.protocol.version	Version of the protocol specified in network.protocol.name	"1.1"
server.address	Name of the local HTTP server that received the request	"example.com"
server.port	Port of the local HTTP server that received the request	"80"
url.scheme	The URI scheme component identifying the used protocol	"http"

HTTP Metrics

On top of the official OpenTelemetry semantic conventions, Traefik provides its own metrics to monitor the incoming traffic.

EntryPoint Metrics

OpenTelemetry

Metric	Type	Labels	Description
traefik_entrypoint_requests_total	Count	code, method, protocol, entrypoint	The total count of HTTP requests received by an entrypoint.
traefik_entrypoint_requests_tls_total	Count	tls_version, tls_cipher, entrypoint	The total count of HTTPS requests received by an entrypoint.
traefik_entrypoint_request_duration_seconds	Histogram	code, method, protocol, entrypoint	Request processing duration histogram on an entrypoint.
traefik_entrypoint_requests_bytes_total	Count	code, method, protocol, entrypoint	The total size of HTTP requests in bytes handled by an entrypoint.
traefik_entrypoint_responses_bytes_total	Count	code, method, protocol, entrypoint	The total size of HTTP responses in bytes handled by an entrypoint.

Prometheus

Metric	Type	Labels	Description
traefik_entrypoint_requests_total	Count	code, method, protocol, entrypoint	The total count of HTTP requests received by an entrypoint.
traefik_entrypoint_requests_tls_total	Count	tls_version, tls_cipher, entrypoint	The total count of HTTPS requests received by an entrypoint.
traefik_entrypoint_request_duration_seconds	Histogram	code, method, protocol, entrypoint	Request processing duration histogram on an entrypoint.
traefik_entrypoint_requests_bytes_total	Count	code, method, protocol, entrypoint	The total size of HTTP requests in bytes handled by an entrypoint.
traefik_entrypoint_responses_bytes_total	Count	code, method, protocol, entrypoint	The total size of HTTP responses in bytes handled by an entrypoint.

Datadog

Metric	Type	Labels	Description
entrypoint.requests.total	Count	code, method, protocol, entrypoint	The total count of HTTP requests received by an entrypoint.
entrypoint.requests.tls.total	Count	tls_version, tls_cipher, entrypoint	The total count of HTTPS requests received by an entrypoint.
entrypoint.request.duration.seconds	Histogram	code, method, protocol, entrypoint	Request processing duration histogram on an entrypoint.
entrypoint.requests.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP requests in bytes handled by an entrypoint.
entrypoint.responses.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP responses in bytes handled by an entrypoint.

InfluxDB2

Metric	Type	Labels	Description
traefik.entrypoint.requests.total	Count	code, method, protocol, entrypoint	The total count of HTTP requests received by an entrypoint.
traefik.entrypoint.requests.tls.total	Count	tls_version, tls_cipher, entrypoint	The total count of HTTPS requests received by an entrypoint.
traefik.entrypoint.request.duration.seconds	Histogram	code, method, protocol, entrypoint	Request processing duration histogram on an entrypoint.
traefik.entrypoint.requests.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP requests in bytes handled by an entrypoint.
traefik.entrypoint.responses.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP responses in bytes handled by an entrypoint.

StatsD

Metric	Type	Labels	Description
{prefix}.entrypoint.requests.total	Count	code, method, protocol, entrypoint	The total count of HTTP requests received by an entrypoint.
{prefix}.entrypoint.requests.tls.total	Count	tls_version, tls_cipher, entrypoint	The total count of HTTPS requests received by an entrypoint.
{prefix}.entrypoint.request.duration.seconds	Histogram	code, method, protocol, entrypoint	Request processing duration histogram on an entrypoint.
{prefix}.entrypoint.requests.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP requests in bytes handled by an entrypoint.
{prefix}.entrypoint.responses.bytes.total	Count	code, method, protocol, entrypoint	The total size of HTTP responses in bytes handled by an entrypoint.

{prefix} Default Value

By default, {prefix} value is traefik.

Router Metrics

OpenTelemetry

Metric	Type	Labels	Description
traefik_router_requests_total	Count	code, method, protocol, router, service	The total count of HTTP requests handled by a router.
traefik_router_requests_tls_total	Count	tls_version, tls_cipher, router, service	The total count of HTTPS requests handled by a router.
traefik_router_request_duration_seconds	Histogram	code, method, protocol, router, service	Request processing duration histogram on a router.
traefik_router_requests_bytes_total	Count	code, method, protocol, router, service	The total size of HTTP requests in bytes handled by a router.
traefik_router_responses_bytes_total	Count	code, method, protocol, router, service	The total size of HTTP responses in bytes handled by a router.

Prometheus

Metric	Type	Labels	Description
traefik_router_requests_total	Count	code, method, protocol, router, service	The total count of HTTP requests handled by a router.
traefik_router_requests_tls_total	Count	tls_version, tls_cipher, router, service	The total count of HTTPS requests handled by a router.
traefik_router_request_duration_seconds	Histogram	code, method, protocol, router, service	Request processing duration histogram on a router.
traefik_router_requests_bytes_total	Count	code, method, protocol, router, service	The total size of HTTP requests in bytes handled by a router.
traefik_router_responses_bytes_total	Count	code, method, protocol, router, service	The total size of HTTP responses in bytes handled by a router.

Datadog

Metric	Type	Labels	Description
router.requests.total	Count	code, method, protocol, router, service	The total count of HTTP requests handled by a router.
router.requests.tls.total	Count	tls_version, tls_cipher, router, service	The total count of HTTPS requests handled by a router.
router.request.duration.seconds	Histogram	code, method, protocol, router, service	Request processing duration histogram on a router.
router.requests.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP requests in bytes handled by a router.
router.responses.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP responses in bytes handled by a router.

InfluxDB2

Metric	Type	Labels	Description
traefik.router.requests.total	Count	code, method, protocol, router, service	The total count of HTTP requests handled by a router.
traefik.router.requests.tls.total	Count	tls_version, tls_cipher, router, service	The total count of HTTPS requests handled by a router.
traefik.router.request.duration.seconds	Histogram	code, method, protocol, router, service	Request processing duration histogram on a router.
traefik.router.requests.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP requests in bytes handled by a router.
traefik.router.responses.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP responses in bytes handled by a router.

StatsD

Metric	Type	Labels	Description
{prefix}.router.requests.total	Count	code, method, protocol, router, service	The total count of HTTP requests handled by a router.
{prefix}.router.requests.tls.total	Count	tls_version, tls_cipher, router, service	The total count of HTTPS requests handled by a router.
{prefix}.router.request.duration.seconds	Histogram	code, method, protocol, router, service	Request processing duration histogram on a router.
{prefix}.router.requests.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP requests in bytes handled by a router.
{prefix}.router.responses.bytes.total	Count	code, method, protocol, router, service	The total size of HTTP responses in bytes handled by a router.

{prefix} Default Value

By default, {prefix} value is traefik.

Service Metrics

OpenTelemetry

Metric	Type	Labels	Description
traefik_service_requests_total	Count	code, method, protocol, service	The total count of HTTP requests processed on a service.
traefik_service_requests_tls_total	Count	tls_version, tls_cipher, service	The total count of HTTPS requests processed on a service.
traefik_service_request_duration_seconds	Histogram	code, method, protocol, service	Request processing duration histogram on a service.
traefik_service_retries_total	Count	service	The count of requests retries on a service.
traefik_service_server_up	Gauge	service, url	Current service's server status, 0 for a down or 1 for up.
traefik_service_requests_bytes_total	Count	code, method, protocol, service	The total size of requests in bytes received by a service.
traefik_service_responses_bytes_total	Count	code, method, protocol, service	The total size of responses in bytes returned by a service.

Prometheus

Metric	Type	Labels	Description
traefik_service_requests_total	Count	code, method, protocol, service	The total count of HTTP requests processed on a service.
traefik_service_requests_tls_total	Count	tls_version, tls_cipher, service	The total count of HTTPS requests processed on a service.
traefik_service_request_duration_seconds	Histogram	code, method, protocol, service	Request processing duration histogram on a service.
traefik_service_retries_total	Count	service	The count of requests retries on a service.
traefik_service_server_up	Gauge	service, url	Current service's server status, 0 for a down or 1 for up.
traefik_service_requests_bytes_total	Count	code, method, protocol, service	The total size of requests in bytes received by a service.
traefik_service_responses_bytes_total	Count	code, method, protocol, service	The total size of responses in bytes returned by a service.

Datadog

Metric	Type	Labels	Description
service.requests.total	Count	code, method, protocol, service	The total count of HTTP requests processed on a service.
router.service.tls.total	Count	tls_version, tls_cipher, service	The total count of HTTPS requests processed on a service.
service.request.duration.seconds	Histogram	code, method, protocol, service	Request processing duration histogram on a service.
service.retries.total	Count	service	The count of requests retries on a service.
service.server.up	Gauge	service, url	Current service's server status, 0 for a down or 1 for up.
service.requests.bytes.total	Count	code, method, protocol, service	The total size of requests in bytes received by a service.
service.responses.bytes.total	Count	code, method, protocol, service	The total size of responses in bytes returned by a service.

InfluxDB2

Metric	Type	Labels	Description
traefik.service.requests.total	Count	code, method, protocol, service	The total count of HTTP requests processed on a service.
traefik.service.requests.tls.total	Count	tls_version, tls_cipher, service	The total count of HTTPS requests processed on a service.
traefik.service.request.duration.seconds	Histogram	code, method, protocol, service	Request processing duration histogram on a service.
traefik.service.retries.total	Count	service	The count of requests retries on a service.
traefik.service.server.up	Gauge	service, url	Current service's server status, 0 for a down or 1 for up.
traefik.service.requests.bytes.total	Count	code, method, protocol, service	The total size of requests in bytes received by a service.
traefik.service.responses.bytes.total	Count	code, method, protocol, service	The total size of responses in bytes returned by a service.

StatsD

Metric	Type	Labels	Description
{prefix}.service.requests.total	Count	code, method, protocol, service	The total count of HTTP requests processed on a service.
{prefix}.service.requests.tls.total	Count	tls_version, tls_cipher, service	The total count of HTTPS requests processed on a service.
{prefix}.service.request.duration.seconds	Histogram	code, method, protocol, service	Request processing duration histogram on a service.
{prefix}.service.retries.total	Count	service	The count of requests retries on a service.
{prefix}.service.server.up	Gauge	service, url	Current service's server status, 0 for a down or 1 for up.
{prefix}.service.requests.bytes.total	Count	code, method, protocol, service	The total size of requests in bytes received by a service.
{prefix}.service.responses.bytes.total	Count	code, method, protocol, service	The total size of responses in bytes returned by a service.

{prefix} Default Value

By default, {prefix} value is traefik.

Labels

Here is a comprehensive list of labels that are provided by the metrics:

Label	Description	example
cn	Certificate Common Name	"example.com"
code	Request code	"200"
entrypoint	Entrypoint that handled the request	"example_entrypoint"
method	Request Method	"GET"
protocol	Request protocol	"http"
router	Router that handled the request	"example_router"
sans	Certificate Subject Alternative NameS	"example.com"
serial	Certificate Serial Number	"123..."
service	Service that handled the request	"example_service@provider"
tls_cipher	TLS cipher used for the request	"TLS_FALLBACK_SCSV"
tls_version	TLS version used for the request	"1.0"
url	Service server url	"http://example.com"

method label value

If the HTTP method verb on a request is not one defined in the set of common methods for HTTP/1.1 or the PRI verb (for HTTP/2), then the value for the method label becomes EXTENSION_METHOD.