# Static Configuration: Environment variables

`TRAEFIK_ACCESSLOG`:  
Access log settings. (Default: ```false```)

`TRAEFIK_ACCESSLOG_BUFFERINGSIZE`:  
Number of access log lines to process in a buffered way. (Default: ```0```)

`TRAEFIK_ACCESSLOG_FIELDS_DEFAULTMODE`:  
Default mode for fields: keep | drop (Default: ```keep```)

`TRAEFIK_ACCESSLOG_FIELDS_HEADERS_DEFAULTMODE`:  
Default mode for fields: keep | drop | redact (Default: ```keep```)

`TRAEFIK_ACCESSLOG_FIELDS_HEADERS_NAMES_<NAME>`:  
Override mode for headers

`TRAEFIK_ACCESSLOG_FIELDS_NAMES_<NAME>`:  
Override mode for fields

`TRAEFIK_ACCESSLOG_FILEPATH`:  
Access log file path. Stdout is used when omitted or empty.

`TRAEFIK_ACCESSLOG_FILTERS_MINDURATION`:  
Keep access logs when request took longer than the specified duration. (Default: ```0```)

`TRAEFIK_ACCESSLOG_FILTERS_RETRYATTEMPTS`:  
Keep access logs when at least one retry happened. (Default: ```false```)

`TRAEFIK_ACCESSLOG_FILTERS_STATUSCODES`:  
Keep access logs with status codes in the specified range.

`TRAEFIK_ACCESSLOG_FORMAT`:  
Access log format: json | common (Default: ```common```)

`TRAEFIK_ACME_ACMELOGGING`:  
Enable debug logging of ACME actions. (Default: ```false```)

`TRAEFIK_ACME_CASERVER`:  
CA server to use. (Default: ```https://acme-v02.api.letsencrypt.org/directory```)

`TRAEFIK_ACME_DNSCHALLENGE`:  
Activate DNS-01 Challenge. (Default: ```false```)

`TRAEFIK_ACME_DNSCHALLENGE_DELAYBEFORECHECK`:  
Assume DNS propagates after a delay in seconds rather than finding and querying nameservers. (Default: ```0```)

`TRAEFIK_ACME_DNSCHALLENGE_DISABLEPROPAGATIONCHECK`:  
Disable the DNS propagation checks before notifying ACME that the DNS challenge is ready. [not recommended] (Default: ```false```)

`TRAEFIK_ACME_DNSCHALLENGE_PROVIDER`:  
Use a DNS-01 based challenge provider rather than HTTPS.

`TRAEFIK_ACME_DNSCHALLENGE_RESOLVERS`:  
Use following DNS servers to resolve the FQDN authority.

`TRAEFIK_ACME_DOMAINS`:  
The list of domains for which certificates are generated on startup. Wildcard domains only accepted with DNSChallenge.

`TRAEFIK_ACME_DOMAINS[n]_MAIN`:  
Default subject name.

`TRAEFIK_ACME_DOMAINS[n]_SANS`:  
Subject alternative names.

`TRAEFIK_ACME_EMAIL`:  
Email address used for registration.

`TRAEFIK_ACME_ENTRYPOINT`:  
EntryPoint to use.

`TRAEFIK_ACME_HTTPCHALLENGE`:  
Activate HTTP-01 Challenge. (Default: ```false```)

`TRAEFIK_ACME_HTTPCHALLENGE_ENTRYPOINT`:  
HTTP challenge EntryPoint

`TRAEFIK_ACME_KEYTYPE`:  
KeyType used for generating certificate private key. Allow value 'EC256', 'EC384', 'RSA2048', 'RSA4096', 'RSA8192'. (Default: ```RSA4096```)

`TRAEFIK_ACME_ONHOSTRULE`:  
Enable certificate generation on router Host rules. (Default: ```false```)

`TRAEFIK_ACME_STORAGE`:  
Storage to use. (Default: ```acme.json```)

`TRAEFIK_ACME_TLSCHALLENGE`:  
Activate TLS-ALPN-01 Challenge. (Default: ```true```)

`TRAEFIK_API`:  
Enable api/dashboard. (Default: ```false```)

`TRAEFIK_API_DASHBOARD`:  
Activate dashboard. (Default: ```true```)

`TRAEFIK_API_ENTRYPOINT`:  
EntryPoint. (Default: ```traefik```)

`TRAEFIK_API_MIDDLEWARES`:  
Middleware list.

`TRAEFIK_API_STATISTICS`:  
Enable more detailed statistics. (Default: ```false```)

`TRAEFIK_API_STATISTICS_RECENTERRORS`:  
Number of recent errors logged. (Default: ```10```)

`TRAEFIK_CONFIGFILE`:  
Configuration file to use. If specified all other flags are ignored. (Default: "")

`TRAEFIK_ENTRYPOINTS_<NAME>`:  
Entry points definition. (Default: ```false```)

`TRAEFIK_ENTRYPOINTS_<NAME>_ADDRESS`:  
Entry point address.

`TRAEFIK_ENTRYPOINTS_<NAME>_FORWARDEDHEADERS_INSECURE`:  
Trust all forwarded headers. (Default: ```false```)

`TRAEFIK_ENTRYPOINTS_<NAME>_FORWARDEDHEADERS_TRUSTEDIPS`:  
Trust only forwarded headers from selected IPs.

`TRAEFIK_ENTRYPOINTS_<NAME>_PROXYPROTOCOL`:  
Proxy-Protocol configuration. (Default: ```false```)

`TRAEFIK_ENTRYPOINTS_<NAME>_PROXYPROTOCOL_INSECURE`:  
Trust all. (Default: ```false```)

`TRAEFIK_ENTRYPOINTS_<NAME>_PROXYPROTOCOL_TRUSTEDIPS`:  
Trust only selected IPs.

`TRAEFIK_ENTRYPOINTS_<NAME>_TRANSPORT_LIFECYCLE_GRACETIMEOUT`:  
Duration to give active requests a chance to finish before Traefik stops. (Default: ```10```)

`TRAEFIK_ENTRYPOINTS_<NAME>_TRANSPORT_LIFECYCLE_REQUESTACCEPTGRACETIMEOUT`:  
Duration to keep accepting requests before Traefik initiates the graceful shutdown procedure. (Default: ```0```)

`TRAEFIK_ENTRYPOINTS_<NAME>_TRANSPORT_RESPONDINGTIMEOUTS_IDLETIMEOUT`:  
IdleTimeout is the maximum amount duration an idle (keep-alive) connection will remain idle before closing itself. If zero, no timeout is set. (Default: ```180```)

`TRAEFIK_ENTRYPOINTS_<NAME>_TRANSPORT_RESPONDINGTIMEOUTS_READTIMEOUT`:  
ReadTimeout is the maximum duration for reading the entire request, including the body. If zero, no timeout is set. (Default: ```0```)

`TRAEFIK_ENTRYPOINTS_<NAME>_TRANSPORT_RESPONDINGTIMEOUTS_WRITETIMEOUT`:  
WriteTimeout is the maximum duration before timing out writes of the response. If zero, no timeout is set. (Default: ```0```)

`TRAEFIK_GLOBAL_CHECKNEWVERSION`:  
Periodically check if a new version has been released. (Default: ```false```)

`TRAEFIK_GLOBAL_DEBUG`:  
Enable debug mode. (Default: ```false```)

`TRAEFIK_GLOBAL_SENDANONYMOUSUSAGE`:  
Periodically send anonymous usage statistics. If the option is not specified, it will be enabled by default.

`TRAEFIK_HOSTRESOLVER`:  
Enable CNAME Flattening. (Default: ```false```)

`TRAEFIK_HOSTRESOLVER_CNAMEFLATTENING`:  
A flag to enable/disable CNAME flattening (Default: ```false```)

`TRAEFIK_HOSTRESOLVER_RESOLVCONFIG`:  
resolv.conf used for DNS resolving (Default: ```/etc/resolv.conf```)

`TRAEFIK_HOSTRESOLVER_RESOLVDEPTH`:  
The maximal depth of DNS recursive resolving (Default: ```5```)

`TRAEFIK_LOG_FILEPATH`:  
Traefik log file path. Stdout is used when omitted or empty.

`TRAEFIK_LOG_FORMAT`:  
Traefik log format: json | common (Default: ```common```)

`TRAEFIK_LOG_LEVEL`:  
Log level set to traefik logs. (Default: ```ERROR```)

`TRAEFIK_METRICS_DATADOG`:  
DataDog metrics exporter type. (Default: ```false```)

`TRAEFIK_METRICS_DATADOG_ADDRESS`:  
DataDog's address. (Default: ```localhost:8125```)

`TRAEFIK_METRICS_DATADOG_PUSHINTERVAL`:  
DataDog push interval. (Default: ```10```)

`TRAEFIK_METRICS_INFLUXDB`:  
InfluxDB metrics exporter type. (Default: ```false```)

`TRAEFIK_METRICS_INFLUXDB_ADDRESS`:  
InfluxDB address. (Default: ```localhost:8089```)

`TRAEFIK_METRICS_INFLUXDB_DATABASE`:  
InfluxDB database used when protocol is http.

`TRAEFIK_METRICS_INFLUXDB_PASSWORD`:  
InfluxDB password (only with http).

`TRAEFIK_METRICS_INFLUXDB_PROTOCOL`:  
InfluxDB address protocol (udp or http). (Default: ```udp```)

`TRAEFIK_METRICS_INFLUXDB_PUSHINTERVAL`:  
InfluxDB push interval. (Default: ```10```)

`TRAEFIK_METRICS_INFLUXDB_RETENTIONPOLICY`:  
InfluxDB retention policy used when protocol is http.

`TRAEFIK_METRICS_INFLUXDB_USERNAME`:  
InfluxDB username (only with http).

`TRAEFIK_METRICS_PROMETHEUS`:  
Prometheus metrics exporter type. (Default: ```false```)

`TRAEFIK_METRICS_PROMETHEUS_BUCKETS`:  
Buckets for latency metrics. (Default: ```0.100000, 0.300000, 1.200000, 5.000000```)

`TRAEFIK_METRICS_PROMETHEUS_ENTRYPOINT`:  
EntryPoint. (Default: ```traefik```)

`TRAEFIK_METRICS_PROMETHEUS_MIDDLEWARES`:  
Middlewares.

`TRAEFIK_METRICS_STATSD`:  
StatsD metrics exporter type. (Default: ```false```)

`TRAEFIK_METRICS_STATSD_ADDRESS`:  
StatsD address. (Default: ```localhost:8125```)

`TRAEFIK_METRICS_STATSD_PUSHINTERVAL`:  
StatsD push interval. (Default: ```10```)

`TRAEFIK_PING`:  
Enable ping. (Default: ```false```)

`TRAEFIK_PING_ENTRYPOINT`:  
Ping entryPoint. (Default: ```traefik```)

`TRAEFIK_PING_MIDDLEWARES`:  
Middleware list.

`TRAEFIK_PROVIDERS_DOCKER`:  
Enable Docker backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_CONSTRAINTS`:  
Filter services by constraint, matching with Traefik tags.

`TRAEFIK_PROVIDERS_DOCKER_CONSTRAINTS[n]_KEY`:  
The provider label that will be matched against. In practice, it is always 'tag'.

`TRAEFIK_PROVIDERS_DOCKER_CONSTRAINTS[n]_MUSTMATCH`:  
Whether the matching operator is equals or not equals. (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_CONSTRAINTS[n]_VALUE`:  
The value that will be matched against.

`TRAEFIK_PROVIDERS_DOCKER_DEFAULTRULE`:  
Default rule. (Default: ```Host(`{{ normalize .Name }}`)```)

`TRAEFIK_PROVIDERS_DOCKER_ENDPOINT`:  
Docker server endpoint. Can be a tcp or a unix socket endpoint. (Default: ```unix:///var/run/docker.sock```)

`TRAEFIK_PROVIDERS_DOCKER_EXPOSEDBYDEFAULT`:  
Expose containers by default. (Default: ```true```)

`TRAEFIK_PROVIDERS_DOCKER_NETWORK`:  
Default Docker network used.

`TRAEFIK_PROVIDERS_DOCKER_SWARMMODE`:  
Use Docker on Swarm Mode. (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_SWARMMODEREFRESHSECONDS`:  
Polling interval for swarm mode. (Default: ```15```)

`TRAEFIK_PROVIDERS_DOCKER_TLS_CA`:  
TLS CA

`TRAEFIK_PROVIDERS_DOCKER_TLS_CAOPTIONAL`:  
TLS CA.Optional (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_TLS_CERT`:  
TLS cert

`TRAEFIK_PROVIDERS_DOCKER_TLS_INSECURESKIPVERIFY`:  
TLS insecure skip verify (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_TLS_KEY`:  
TLS key

`TRAEFIK_PROVIDERS_DOCKER_USEBINDPORTIP`:  
Use the ip address from the bound port, rather than from the inner network. (Default: ```false```)

`TRAEFIK_PROVIDERS_DOCKER_WATCH`:  
Watch provider. (Default: ```true```)

`TRAEFIK_PROVIDERS_FILE`:  
Enable File backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_FILE_DEBUGLOGGENERATEDTEMPLATE`:  
Enable debug logging of generated configuration template. (Default: ```false```)

`TRAEFIK_PROVIDERS_FILE_DIRECTORY`:  
Load configuration from one or more .toml files in a directory.

`TRAEFIK_PROVIDERS_FILE_FILENAME`:  
Override default configuration template. For advanced users :)

`TRAEFIK_PROVIDERS_FILE_WATCH`:  
Watch provider. (Default: ```true```)

`TRAEFIK_PROVIDERS_KUBERNETES`:  
Enable Kubernetes backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_KUBERNETESCRD`:  
Enable Kubernetes backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_KUBERNETESCRD_CERTAUTHFILEPATH`:  
Kubernetes certificate authority file path (not needed for in-cluster client).

`TRAEFIK_PROVIDERS_KUBERNETESCRD_DISABLEPASSHOSTHEADERS`:  
Kubernetes disable PassHost Headers. (Default: ```false```)

`TRAEFIK_PROVIDERS_KUBERNETESCRD_ENDPOINT`:  
Kubernetes server endpoint (required for external cluster client).

`TRAEFIK_PROVIDERS_KUBERNETESCRD_INGRESSCLASS`:  
Value of kubernetes.io/ingress.class annotation to watch for.

`TRAEFIK_PROVIDERS_KUBERNETESCRD_LABELSELECTOR`:  
Kubernetes label selector to use.

`TRAEFIK_PROVIDERS_KUBERNETESCRD_NAMESPACES`:  
Kubernetes namespaces.

`TRAEFIK_PROVIDERS_KUBERNETESCRD_TOKEN`:  
Kubernetes bearer token (not needed for in-cluster client).

`TRAEFIK_PROVIDERS_KUBERNETES_CERTAUTHFILEPATH`:  
Kubernetes certificate authority file path (not needed for in-cluster client).

`TRAEFIK_PROVIDERS_KUBERNETES_DISABLEPASSHOSTHEADERS`:  
Kubernetes disable PassHost Headers. (Default: ```false```)

`TRAEFIK_PROVIDERS_KUBERNETES_ENDPOINT`:  
Kubernetes server endpoint (required for external cluster client).

`TRAEFIK_PROVIDERS_KUBERNETES_INGRESSCLASS`:  
Value of kubernetes.io/ingress.class annotation to watch for.

`TRAEFIK_PROVIDERS_KUBERNETES_INGRESSENDPOINT_HOSTNAME`:  
Hostname used for Kubernetes Ingress endpoints.

`TRAEFIK_PROVIDERS_KUBERNETES_INGRESSENDPOINT_IP`:  
IP used for Kubernetes Ingress endpoints.

`TRAEFIK_PROVIDERS_KUBERNETES_INGRESSENDPOINT_PUBLISHEDSERVICE`:  
Published Kubernetes Service to copy status from.

`TRAEFIK_PROVIDERS_KUBERNETES_LABELSELECTOR`:  
Kubernetes Ingress label selector to use.

`TRAEFIK_PROVIDERS_KUBERNETES_NAMESPACES`:  
Kubernetes namespaces.

`TRAEFIK_PROVIDERS_KUBERNETES_TOKEN`:  
Kubernetes bearer token (not needed for in-cluster client).

`TRAEFIK_PROVIDERS_MARATHON`:  
Enable Marathon backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_BASIC_HTTPBASICAUTHUSER`:  
Basic authentication User.

`TRAEFIK_PROVIDERS_MARATHON_BASIC_HTTPBASICPASSWORD`:  
Basic authentication Password.

`TRAEFIK_PROVIDERS_MARATHON_CONSTRAINTS`:  
Filter services by constraint, matching with Traefik tags.

`TRAEFIK_PROVIDERS_MARATHON_CONSTRAINTS[n]_KEY`:  
The provider label that will be matched against. In practice, it is always 'tag'.

`TRAEFIK_PROVIDERS_MARATHON_CONSTRAINTS[n]_MUSTMATCH`:  
Whether the matching operator is equals or not equals. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_CONSTRAINTS[n]_VALUE`:  
The value that will be matched against.

`TRAEFIK_PROVIDERS_MARATHON_DCOSTOKEN`:  
DCOSToken for DCOS environment, This will override the Authorization header.

`TRAEFIK_PROVIDERS_MARATHON_DEFAULTRULE`:  
Default rule. (Default: ```Host(`{{ normalize .Name }}`)```)

`TRAEFIK_PROVIDERS_MARATHON_DIALERTIMEOUT`:  
Set a dialer timeout for Marathon. (Default: ```5```)

`TRAEFIK_PROVIDERS_MARATHON_ENDPOINT`:  
Marathon server endpoint. You can also specify multiple endpoint for Marathon. (Default: ```http://127.0.0.1:8080```)

`TRAEFIK_PROVIDERS_MARATHON_EXPOSEDBYDEFAULT`:  
Expose Marathon apps by default. (Default: ```true```)

`TRAEFIK_PROVIDERS_MARATHON_FILTERMARATHONCONSTRAINTS`:  
Enable use of Marathon constraints in constraint filtering. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_FORCETASKHOSTNAME`:  
Force to use the task's hostname. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_KEEPALIVE`:  
Set a TCP Keep Alive time. (Default: ```10```)

`TRAEFIK_PROVIDERS_MARATHON_RESPECTREADINESSCHECKS`:  
Filter out tasks with non-successful readiness checks during deployments. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_RESPONSEHEADERTIMEOUT`:  
Set a response header timeout for Marathon. (Default: ```60```)

`TRAEFIK_PROVIDERS_MARATHON_TLSHANDSHAKETIMEOUT`:  
Set a TLS handshake timeout for Marathon. (Default: ```5```)

`TRAEFIK_PROVIDERS_MARATHON_TLS_CA`:  
TLS CA

`TRAEFIK_PROVIDERS_MARATHON_TLS_CAOPTIONAL`:  
TLS CA.Optional (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_TLS_CERT`:  
TLS cert

`TRAEFIK_PROVIDERS_MARATHON_TLS_INSECURESKIPVERIFY`:  
TLS insecure skip verify (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_TLS_KEY`:  
TLS key

`TRAEFIK_PROVIDERS_MARATHON_TRACE`:  
Display additional provider logs. (Default: ```false```)

`TRAEFIK_PROVIDERS_MARATHON_WATCH`:  
Watch provider. (Default: ```true```)

`TRAEFIK_PROVIDERS_PROVIDERSTHROTTLEDURATION`:  
Backends throttle duration: minimum duration between 2 events from providers before applying a new configuration. It avoids unnecessary reloads if multiples events are sent in a short amount of time. (Default: ```0```)

`TRAEFIK_PROVIDERS_RANCHER`:  
Enable Rancher backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_RANCHER_CONSTRAINTS`:  
Filter services by constraint, matching with Traefik tags.

`TRAEFIK_PROVIDERS_RANCHER_CONSTRAINTS[n]_KEY`:  
The provider label that will be matched against. In practice, it is always 'tag'.

`TRAEFIK_PROVIDERS_RANCHER_CONSTRAINTS[n]_MUSTMATCH`:  
Whether the matching operator is equals or not equals. (Default: ```false```)

`TRAEFIK_PROVIDERS_RANCHER_CONSTRAINTS[n]_VALUE`:  
The value that will be matched against.

`TRAEFIK_PROVIDERS_RANCHER_DEFAULTRULE`:  
Default rule. (Default: ```Host(`{{ normalize .Name }}`)```)

`TRAEFIK_PROVIDERS_RANCHER_ENABLESERVICEHEALTHFILTER`:  
Filter services with unhealthy states and inactive states. (Default: ```true```)

`TRAEFIK_PROVIDERS_RANCHER_EXPOSEDBYDEFAULT`:  
Expose containers by default. (Default: ```true```)

`TRAEFIK_PROVIDERS_RANCHER_INTERVALPOLL`:  
Poll the Rancher metadata service every 'rancher.refreshseconds' (less accurate). (Default: ```false```)

`TRAEFIK_PROVIDERS_RANCHER_PREFIX`:  
Prefix used for accessing the Rancher metadata service. (Default: ```latest```)

`TRAEFIK_PROVIDERS_RANCHER_REFRESHSECONDS`:  
Defines the polling interval in seconds. (Default: ```15```)

`TRAEFIK_PROVIDERS_RANCHER_WATCH`:  
Watch provider. (Default: ```true```)

`TRAEFIK_PROVIDERS_REST`:  
Enable Rest backend with default settings. (Default: ```false```)

`TRAEFIK_PROVIDERS_REST_ENTRYPOINT`:  
EntryPoint. (Default: ```traefik```)

`TRAEFIK_SERVERSTRANSPORT_FORWARDINGTIMEOUTS_DIALTIMEOUT`:  
The amount of time to wait until a connection to a backend server can be established. If zero, no timeout exists. (Default: ```30```)

`TRAEFIK_SERVERSTRANSPORT_FORWARDINGTIMEOUTS_RESPONSEHEADERTIMEOUT`:  
The amount of time to wait for a server's response headers after fully writing the request (including its body, if any). If zero, no timeout exists. (Default: ```0```)

`TRAEFIK_SERVERSTRANSPORT_INSECURESKIPVERIFY`:  
Disable SSL certificate verification. (Default: ```false```)

`TRAEFIK_SERVERSTRANSPORT_MAXIDLECONNSPERHOST`:  
If non-zero, controls the maximum idle (keep-alive) to keep per-host. If zero, DefaultMaxIdleConnsPerHost is used (Default: ```0```)

`TRAEFIK_SERVERSTRANSPORT_ROOTCAS`:  
Add cert file for self-signed certificate.

`TRAEFIK_TRACING`:  
OpenTracing configuration. (Default: ```false```)

`TRAEFIK_TRACING_BACKEND`:  
Selects the tracking backend ('jaeger','zipkin','datadog','instana'). (Default: ```jaeger```)

`TRAEFIK_TRACING_DATADOG`:  
Settings for DataDog. (Default: ```false```)

`TRAEFIK_TRACING_DATADOG_BAGAGEPREFIXHEADERNAME`:  
Specifies the header name prefix that will be used to store baggage items in a map.

`TRAEFIK_TRACING_DATADOG_DEBUG`:  
Enable DataDog debug. (Default: ```false```)

`TRAEFIK_TRACING_DATADOG_GLOBALTAG`:  
Key:Value tag to be set on all the spans.

`TRAEFIK_TRACING_DATADOG_LOCALAGENTHOSTPORT`:  
Set datadog-agent's host:port that the reporter will used. (Default: ```localhost:8126```)

`TRAEFIK_TRACING_DATADOG_PARENTIDHEADERNAME`:  
Specifies the header name that will be used to store the parent ID.

`TRAEFIK_TRACING_DATADOG_PRIORITYSAMPLING`:  
Enable priority sampling. When using distributed tracing, this option must be enabled in order to get all the parts of a distributed trace sampled. (Default: ```false```)

`TRAEFIK_TRACING_DATADOG_SAMPLINGPRIORITYHEADERNAME`:  
Specifies the header name that will be used to store the sampling priority.

`TRAEFIK_TRACING_DATADOG_TRACEIDHEADERNAME`:  
Specifies the header name that will be used to store the trace ID.

`TRAEFIK_TRACING_HAYSTACK`:  
Settings for Haystack. (Default: ```false```)

`TRAEFIK_TRACING_HAYSTACK_BAGGAGEPREFIXHEADERNAME`:  
specifies the header name prefix that will be used to store baggage items in a map.

`TRAEFIK_TRACING_HAYSTACK_GLOBALTAG`:  
Key:Value tag to be set on all the spans.

`TRAEFIK_TRACING_HAYSTACK_LOCALAGENTHOST`:  
Set haystack-agent's host that the reporter will used. (Default: ```LocalAgentHost```)

`TRAEFIK_TRACING_HAYSTACK_LOCALAGENTPORT`:  
Set haystack-agent's port that the reporter will used. (Default: ```35000```)

`TRAEFIK_TRACING_HAYSTACK_PARENTIDHEADERNAME`:  
Specifies the header name that will be used to store the parent ID.

`TRAEFIK_TRACING_HAYSTACK_SPANIDHEADERNAME`:  
Specifies the header name that will be used to store the span ID.

`TRAEFIK_TRACING_HAYSTACK_TRACEIDHEADERNAME`:  
Specifies the header name that will be used to store the trace ID.

`TRAEFIK_TRACING_INSTANA`:  
Settings for Instana. (Default: ```false```)

`TRAEFIK_TRACING_INSTANA_LOCALAGENTHOST`:  
Set instana-agent's host that the reporter will used. (Default: ```localhost```)

`TRAEFIK_TRACING_INSTANA_LOCALAGENTPORT`:  
Set instana-agent's port that the reporter will used. (Default: ```42699```)

`TRAEFIK_TRACING_INSTANA_LOGLEVEL`:  
Set instana-agent's log level. ('error','warn','info','debug') (Default: ```info```)

`TRAEFIK_TRACING_JAEGER`:  
Settings for jaeger. (Default: ```false```)

`TRAEFIK_TRACING_JAEGER_GEN128BIT`:  
Generate 128 bit span IDs. (Default: ```false```)

`TRAEFIK_TRACING_JAEGER_LOCALAGENTHOSTPORT`:  
Set jaeger-agent's host:port that the reporter will used. (Default: ```127.0.0.1:6831```)

`TRAEFIK_TRACING_JAEGER_PROPAGATION`:  
Which propgation format to use (jaeger/b3). (Default: ```jaeger```)

`TRAEFIK_TRACING_JAEGER_SAMPLINGPARAM`:  
Set the sampling parameter. (Default: ```1.000000```)

`TRAEFIK_TRACING_JAEGER_SAMPLINGSERVERURL`:  
Set the sampling server url. (Default: ```http://localhost:5778/sampling```)

`TRAEFIK_TRACING_JAEGER_SAMPLINGTYPE`:  
Set the sampling type. (Default: ```const```)

`TRAEFIK_TRACING_JAEGER_TRACECONTEXTHEADERNAME`:  
Set the header to use for the trace-id. (Default: ```uber-trace-id```)

`TRAEFIK_TRACING_SERVICENAME`:  
Set the name for this service. (Default: ```traefik```)

`TRAEFIK_TRACING_SPANNAMELIMIT`:  
Set the maximum character limit for Span names (default 0 = no limit). (Default: ```0```)

`TRAEFIK_TRACING_ZIPKIN`:  
Settings for zipkin. (Default: ```false```)

`TRAEFIK_TRACING_ZIPKIN_DEBUG`:  
Enable Zipkin debug. (Default: ```false```)

`TRAEFIK_TRACING_ZIPKIN_HTTPENDPOINT`:  
HTTP Endpoint to report traces to. (Default: ```http://localhost:9411/api/v1/spans```)

`TRAEFIK_TRACING_ZIPKIN_ID128BIT`:  
Use Zipkin 128 bit root span IDs. (Default: ```true```)

`TRAEFIK_TRACING_ZIPKIN_SAMESPAN`:  
Use Zipkin SameSpan RPC style traces. (Default: ```false```)

`TRAEFIK_TRACING_ZIPKIN_SAMPLERATE`:  
The rate between 0.0 and 1.0 of requests to trace. (Default: ```1.000000```)