Add ResponseCode to CircuitBreaker

docs/content/middlewares/http/circuitbreaker.md

@@ -85,6 +85,7 @@ At specified intervals (`checkPeriod`), the circuit breaker evaluates `expressio
 ### Open
 
 While open, the fallback mechanism takes over the normal service calls for a duration of `FallbackDuration`.
+The fallback mechanism returns a `HTTP 503` (or `ResponseCode`) to the client.
 After this duration, it enters the recovering state.
 
 ### Recovering
@@ -179,3 +180,9 @@ The duration for which the circuit breaker will wait before trying to recover (f
 _Optional, Default="10s"_
 
 The duration for which the circuit breaker will try to recover (as soon as it is in recovering state).
+
+### `ResponseCode`
+
+_Optional, Default="503"_
+
+The status code that the circuit breaker will return while it is in the open state.

docs/content/reference/dynamic-configuration/docker-labels.yml

@@ -16,6 +16,7 @@
 - "traefik.http.middlewares.middleware05.circuitbreaker.expression=foobar"
 - "traefik.http.middlewares.middleware05.circuitbreaker.fallbackduration=42s"
 - "traefik.http.middlewares.middleware05.circuitbreaker.recoveryduration=42s"
+- "traefik.http.middlewares.middleware05.circuitbreaker.responsecode=42"
 - "traefik.http.middlewares.middleware06.compress=true"
 - "traefik.http.middlewares.middleware06.compress.excludedcontenttypes=foobar, foobar"
 - "traefik.http.middlewares.middleware06.compress.includedcontenttypes=foobar, foobar"

docs/content/reference/dynamic-configuration/file.toml

@@ -137,6 +137,7 @@
         checkPeriod = "42s"
         fallbackDuration = "42s"
         recoveryDuration = "42s"
+        responseCode = 42
     [http.middlewares.Middleware06]
       [http.middlewares.Middleware06.compress]
         excludedContentTypes = ["foobar", "foobar"]

docs/content/reference/dynamic-configuration/file.yaml

@@ -142,6 +142,7 @@ http:
         checkPeriod: 42s
         fallbackDuration: 42s
         recoveryDuration: 42s
+        responseCode: 42
     Middleware06:
       compress:
         excludedContentTypes:

docs/content/reference/dynamic-configuration/kv-ref.md

@@ -20,6 +20,7 @@ THIS FILE MUST NOT BE EDITED BY HAND
 | `traefik/http/middlewares/Middleware05/circuitBreaker/expression` | `foobar` |
 | `traefik/http/middlewares/Middleware05/circuitBreaker/fallbackDuration` | `42s` |
 | `traefik/http/middlewares/Middleware05/circuitBreaker/recoveryDuration` | `42s` |
+| `traefik/http/middlewares/Middleware05/circuitBreaker/responseCode` | `42` |
 | `traefik/http/middlewares/Middleware06/compress/excludedContentTypes/0` | `foobar` |
 | `traefik/http/middlewares/Middleware06/compress/excludedContentTypes/1` | `foobar` |
 | `traefik/http/middlewares/Middleware06/compress/includedContentTypes/0` | `foobar` |