Add unhealthy Interval to the health check configuration

docs/content/routing/providers/consul-catalog.md

@@ -218,6 +218,14 @@ you'd add the tag `traefik.http.services.{name-of-your-choice}.loadbalancer.pass
     traefik.http.services.myservice.loadbalancer.healthcheck.interval=10
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.unhealthyinterval`"
+    
+    See [health check](../services/index.md#health-check) for more information.
+    
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.healthcheck.unhealthyinterval=10
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
     
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/providers/docker.md

@@ -333,6 +333,14 @@ you'd add the label `traefik.http.services.<name-of-your-choice>.loadbalancer.pa
     - "traefik.http.services.myservice.loadbalancer.healthcheck.interval=10s"
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.unhealthyinterval`"
+
+    See [health check](../services/index.md#health-check) for more information.
+
+    ```yaml
+    - "traefik.http.services.myservice.loadbalancer.healthcheck.unhealthyinterval=10s"
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
 
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/providers/ecs.md

@@ -220,6 +220,14 @@ you'd add the label `traefik.http.services.{name-of-your-choice}.loadbalancer.pa
     traefik.http.services.myservice.loadbalancer.healthcheck.interval=10
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.unhealthyinterval`"
+    
+    See [health check](../services/index.md#health-check) for more information.
+    
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.healthcheck.unhealthyinterval=10
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
     
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/providers/kv.md

@@ -180,6 +180,14 @@ A Story of key & values
     |---------------------------------------------------------------------|-------|
     | `traefik/http/services/myservice/loadbalancer/healthcheck/interval` | `10`  |
 
+??? info "`traefik/http/services/<service_name>/loadbalancer/healthcheck/unhealthyinterval`"
+
+    See [health check](../services/index.md#health-check) for more information.
+
+    | Key (Path)                                                                   | Value |
+    |------------------------------------------------------------------------------|-------|
+    | `traefik/http/services/myservice/loadbalancer/healthcheck/unhealthyinterval` | `10`  |
+
 ??? info "`traefik/http/services/<service_name>/loadbalancer/healthcheck/path`"
 
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/providers/nomad.md

@@ -218,6 +218,14 @@ you'd add the tag `traefik.http.services.{name-of-your-choice}.loadbalancer.pass
     traefik.http.services.myservice.loadbalancer.healthcheck.interval=10
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.unhealthyinterval`"
+
+    See [health check](../services/index.md#health-check) for more information.
+
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.healthcheck.unhealthyinterval=10
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
 
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/providers/swarm.md

@@ -347,6 +347,14 @@ you'd add the label `traefik.http.services.<name-of-your-choice>.loadbalancer.pa
     - "traefik.http.services.myservice.loadbalancer.healthcheck.interval=10s"
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.unhealthyinterval`"
+
+    See [health check](../services/index.md#health-check) for more information.
+
+    ```yaml
+    - "traefik.http.services.myservice.loadbalancer.healthcheck.unhealthyinterval=10s"
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
 
     See [health check](../services/index.md#health-check) for more information.

docs/content/routing/services/index.md

@@ -415,7 +415,8 @@ Below are the available options for the health check mechanism:
 - `mode` (default: http), if defined to `grpc`, will use the gRPC health check protocol to probe the server.
 - `hostname` (optional), sets the value of `hostname` in the `Host` header of the health check request.
 - `port` (optional), replaces the server URL `port` for the health check endpoint.
-- `interval` (default: 30s), defines the frequency of the health check calls.
+- `interval` (default: 30s), defines the frequency of the health check calls for healthy targets.
+- `unhealthyInterval` (default: 30s), defines the frequency of the health check calls for unhealthy targets.  When not defined, it defaults to the `interval` value.
 - `timeout` (default: 5s), defines the maximum duration Traefik will wait for a health check request before considering the server unhealthy.
 - `headers` (optional), defines custom headers to be sent to the health check endpoint.
 - `followRedirects` (default: true), defines whether redirects should be followed during the health check calls.
@@ -424,7 +425,7 @@ Below are the available options for the health check mechanism:
 
 !!! info "Interval & Timeout Format"
 
-    Interval and timeout are to be given in a format understood by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration).
+    Interval, UnhealthyInterval and Timeout are to be given in a format understood by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration).
 
 !!! info "Recovering Servers"