Support setting sticky cookie max age

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

@@ -273,6 +273,14 @@ you'd add the tag `traefik.http.services.{name-of-your-choice}.loadbalancer.pass
     traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.maxage`"
+    
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+    
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.sticky.cookie.maxage=42
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
 
     See [response forwarding](../services/index.md#response-forwarding) for more information.

docs/content/routing/providers/docker.md

@@ -376,6 +376,14 @@ you'd add the label `traefik.http.services.<name-of-your-choice>.loadbalancer.pa
     - "traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none"
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.maxage`"
+
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+
+    ```yaml
+    - "traefik.http.services.myservice.loadbalancer.sticky.cookie.maxage=42"
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
 
     See [response forwarding](../services/index.md#response-forwarding) for more information.

docs/content/routing/providers/ecs.md

@@ -275,6 +275,14 @@ you'd add the label `traefik.http.services.{name-of-your-choice}.loadbalancer.pa
     traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.maxage`"
+    
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+    
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.sticky.cookie.maxage=42
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
     
     See [response forwarding](../services/index.md#response-forwarding) for more information.

docs/content/routing/providers/kubernetes-crd.md

@@ -348,6 +348,7 @@ Register the `IngressRoute` [kind](../../reference/dynamic-configuration/kuberne
               name: cookie
               secure: true
               sameSite: none
+              maxAge: 42  
           strategy: RoundRobin
           weight: 10
           nativeLB: true                # [11]

docs/content/routing/providers/kubernetes-ingress.md

@@ -351,6 +351,14 @@ which in turn will create the resulting routers, services, handlers, etc.
     traefik.ingress.kubernetes.io/service.sticky.cookie.httponly: "true"
     ```
 
+??? info "`traefik.ingress.kubernetes.io/service.sticky.cookie.maxage`"
+
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+
+    ```yaml
+    traefik.ingress.kubernetes.io/service.sticky.cookie.maxage: 42
+    ```
+
 ## Path Types on Kubernetes 1.18+
 
 If the Kubernetes cluster version is 1.18+,

docs/content/routing/providers/kv.md

@@ -244,6 +244,14 @@ A Story of key & values
     |-----------------------------------------------------------------------|--------|
     | `traefik/http/services/myservice/loadbalancer/sticky/cookie/samesite` | `none` |
 
+??? info "`traefik/http/services/<service_name>/loadbalancer/sticky/cookie/maxage`"
+
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+
+    | Key (Path)                                                          | Value |
+    |---------------------------------------------------------------------|-------|
+    | `traefik/http/services/myservice/loadbalancer/sticky/cookie/maxage` | `42`  |
+
 ??? info "`traefik/http/services/<service_name>/loadbalancer/responseforwarding/flushinterval`"
 
     See [response forwarding](../services/index.md#response-forwarding) for more information.
@@ -306,6 +314,12 @@ A Story of key & values
     |------------------------------------------------------------------------|--------|
     | `traefik/http/services/<service_name>/weighted/sticky/cookie/httpOnly` | `true` |
 
+??? info "`traefik/http/services/<service_name>/weighted/sticky/cookie/maxage`"
+
+    | Key (Path)                                                           | Value |
+    |----------------------------------------------------------------------|-------|
+    | `traefik/http/services/<service_name>/weighted/sticky/cookie/maxage` | `42`  |
+
 ### Middleware
 
 More information about available middlewares in the dedicated [middlewares section](../../middlewares/overview.md).

docs/content/routing/providers/nomad.md

@@ -265,6 +265,14 @@ you'd add the tag `traefik.http.services.{name-of-your-choice}.loadbalancer.pass
     traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none
     ```
 
+??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.maxage`"
+
+    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
+
+    ```yaml
+    traefik.http.services.myservice.loadbalancer.sticky.cookie.maxage=42
+    ```
+
 ??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
 
     See [response forwarding](../services/index.md#response-forwarding) for more information.

docs/content/routing/services/index.md

@@ -187,6 +187,13 @@ On subsequent requests, to keep the session alive with the same server, the clie
 
     The default cookie name is an abbreviation of a sha1 (ex: `_1d52e`).
 
+!!! info "MaxAge"
+
+    By default, the affinity cookie will never expire as the `MaxAge` option is set to zero.
+
+    This option indicates the number of seconds until the cookie expires.  
+    When set to a negative number, the cookie expires immediately.
+    
 !!! info "Secure & HTTPOnly & SameSite flags"
 
     By default, the affinity cookie is created without those flags.