# Azure Service Fabric Backend
Træfik can be configured to use Azure Service Fabric as a backend configuration.
See [this repository for an example deployment package and further documentation.](https://aka.ms/traefikonsf)
## Azure Service Fabric
```toml
################################################################
# Azure Service Fabric provider
################################################################
# Enable Azure Service Fabric configuration backend
[serviceFabric]
# Azure Service Fabric Management Endpoint
#
# Required
#
clusterManagementUrl = "https://localhost:19080"
# Azure Service Fabric Management Endpoint API Version
#
# Required
# Default: "3.0"
#
apiVersion = "3.0"
# Azure Service Fabric Polling Interval (in seconds)
#
# Required
# Default: 10
#
refreshSeconds = 10
# Enable TLS connection.
#
# Optional
#
# [serviceFabric.tls]
# ca = "/etc/ssl/ca.crt"
# cert = "/etc/ssl/servicefabric.crt"
# key = "/etc/ssl/servicefabric.key"
# insecureSkipVerify = true
```
## Labels
The provider uses labels to configure how services are exposed through Træfik.
These can be set using Extensions and the Property Manager API
#### Extensions
Set labels with extensions through the services `ServiceManifest.xml` file.
Here is an example of an extension setting Træfik labels:
```xml
```
#### Property Manager
Set Labels with the property manager API to overwrite and add labels, while your service is running.
Here is an example of adding a frontend rule using the property manager API.
```shell
curl -X PUT \
'http://localhost:19080/Names/GettingStartedApplication2/WebService/$/GetProperty?api-version=6.0&IncludeValues=true' \
-d '{
"PropertyName": "traefik.frontend.rule.default",
"Value": {
"Kind": "String",
"Data": "PathPrefixStrip: /a/path/to/strip"
},
"CustomTypeId": "LabelType"
}'
```
!!! note
This functionality will be released in a future version of the [sfctl](https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-application-lifecycle-sfctl) tool.
## Available Labels
Labels, set through extensions or the property manager, can be used on services to override default behavior.
| Label | Description |
|------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.enable=false` | Disable this container in Træfik |
| `traefik.backend.circuitbreaker.expression=EXPR` | Create a [circuit breaker](/basics/#backends) to be used against the backend |
| `traefik.backend.group.name` | Group all services with the same name into a single backend in Træfik |
| `traefik.backend.group.weight` | Set the weighting of the current services nodes in the backend group |
| `traefik.backend.healthcheck.path=/health` | Enable health check for the backend, hitting the container at `path`. |
| `traefik.backend.healthcheck.port=8080` | Allow to use a different port for the health check. |
| `traefik.backend.healthcheck.interval=1s` | Define the health check interval. |
| `traefik.backend.loadbalancer.method=drr` | Override the default `wrr` load balancer algorithm |
| `traefik.backend.loadbalancer.stickiness=true` | Enable backend sticky sessions |
| `traefik.backend.loadbalancer.stickiness.cookieName=NAME` | Manually set the cookie name for sticky sessions |
| `traefik.backend.loadbalancer.sticky=true` | Enable backend sticky sessions (DEPRECATED) |
| `traefik.backend.maxconn.amount=10` | Set a maximum number of connections to the backend. Must be used in conjunction with the below label to take effect. |
| `traefik.backend.maxconn.extractorfunc=client.ip` | Set the function to be used against the request to determine what to limit maximum connections to the backend by. Must be used in conjunction with the above label to take effect. |
| `traefik.backend.weight=10` | Assign this weight to the container |
| `traefik.frontend.auth.basic=EXPR` | Sets basic authentication for that frontend in CSV format: `User:Hash,User:Hash` |
| `traefik.frontend.entryPoints=http,https` | Assign this frontend to entry points `http` and `https`. Overrides `defaultEntryPoints` |
| `traefik.frontend.passHostHeader=true` | Forward client `Host` header to the backend. |
| `traefik.frontend.passTLSCert=true` | Forward TLS Client certificates to the backend. |
| `traefik.frontend.priority=10` | Override default frontend priority |
| `traefik.frontend.redirect.entryPoint=https` | Enables Redirect to another entryPoint for that frontend (e.g. HTTPS) |
| `traefik.frontend.redirect.regex=^http://localhost/(.*)` | Redirect to another URL for that frontend. Must be set with `traefik.frontend.redirect.replacement`. |
| `traefik.frontend.redirect.replacement=http://mydomain/$1` | Redirect to another URL for that frontend. Must be set with `traefik.frontend.redirect.regex`. |
| `traefik.frontend.redirect.permanent=true` | Return 301 instead of 302. |
| `traefik.frontend.rule=EXPR` | Override the default frontend rule. Defaults to SF address. |
| `traefik.frontend.whiteList.sourceRange=RANGE` | List of IP-Ranges which are allowed to access. An unset or empty list allows all Source-IPs to access. If one of the Net-Specifications are invalid, the whole list is invalid and allows all Source-IPs to access. |
| `traefik.frontend.whiteList.useXForwardedFor=true` | Use `X-Forwarded-For` header as valid source of IP for the white list. |
### Custom Headers
| Label | Description |
|-------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.frontend.headers.customRequestHeaders=EXPR ` | Provides the container with custom request headers that will be appended to each request forwarded to the container. Format: HEADER:value||HEADER2:value2 |
| `traefik.frontend.headers.customResponseHeaders=EXPR` | Appends the headers to each response returned by the container, before forwarding the response to the client. Format: HEADER:value||HEADER2:value2 |
### Security Headers
| Label | Description |
|----------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.frontend.headers.allowedHosts=EXPR` | Provides a list of allowed hosts that requests will be processed. Format: `Host1,Host2` |
| `traefik.frontend.headers.hostsProxyHeaders=EXPR ` | Provides a list of headers that the proxied hostname may be stored. Format: `HEADER1,HEADER2` |
| `traefik.frontend.headers.SSLRedirect=true` | Forces the frontend to redirect to SSL if a non-SSL request is sent. |
| `traefik.frontend.headers.SSLTemporaryRedirect=true` | Forces the frontend to redirect to SSL if a non-SSL request is sent, but by sending a 302 instead of a 301. |
| `traefik.frontend.headers.SSLHost=HOST` | This setting configures the hostname that redirects will be based on. Default is "", which is the same host as the request. |
| `traefik.frontend.headers.SSLProxyHeaders=EXPR` | Header combinations that would signify a proper SSL Request (Such as `X-Forwarded-For:https`). Format: HEADER:value||HEADER2:value2 |
| `traefik.frontend.headers.STSSeconds=315360000` | Sets the max-age of the STS header. |
| `traefik.frontend.headers.STSIncludeSubdomains=true` | Adds the `IncludeSubdomains` section of the STS header. |
| `traefik.frontend.headers.STSPreload=true` | Adds the preload flag to the STS header. |
| `traefik.frontend.headers.forceSTSHeader=false` | Adds the STS header to non-SSL requests. |
| `traefik.frontend.headers.frameDeny=false` | Adds the `X-Frame-Options` header with the value of `DENY`. |
| `traefik.frontend.headers.customFrameOptionsValue=VALUE` | Overrides the `X-Frame-Options` header with the custom value. |
| `traefik.frontend.headers.contentTypeNosniff=true` | Adds the `X-Content-Type-Options` header with the value `nosniff`. |
| `traefik.frontend.headers.browserXSSFilter=true` | Adds the X-XSS-Protection header with the value `1; mode=block`. |
| `traefik.frontend.headers.customBrowserXSSValue=VALUE` | Set custom value for X-XSS-Protection header. This overrides the BrowserXssFilter option. |
| `traefik.frontend.headers.contentSecurityPolicy=VALUE` | Adds CSP Header with the custom value. |
| `traefik.frontend.headers.publicKey=VALUE` | Adds pinned HTST public key header. |
| `traefik.frontend.headers.referrerPolicy=VALUE` | Adds referrer policy header. |
| `traefik.frontend.headers.isDevelopment=false` | This will cause the `AllowedHosts`, `SSLRedirect`, and `STSSeconds`/`STSIncludeSubdomains` options to be ignored during development. When deploying to production, be sure to set this to false. |