The /gateway actuator endpoint allows to monitor and interact with a Spring Cloud Gateway application. To be remotely accessible, the endpoint has to be enabled and exposed via HTTP or JMX in the application properties.
application.properties. +
management.endpoint.gateway.enabled=true # default value +management.endpoints.web.exposure.include=gateway
+
To retrieve the global filters applied to all routes, make a GET request to /actuator/gateway/globalfilters. The resulting response is similar to the following:
{
+ "org.springframework.cloud.gateway.filter.LoadBalancerClientFilter@77856cc5": 10100,
+ "org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter@4f6fd101": 10000,
+ "org.springframework.cloud.gateway.filter.NettyWriteResponseFilter@32d22650": -1,
+ "org.springframework.cloud.gateway.filter.ForwardRoutingFilter@106459d9": 2147483647,
+ "org.springframework.cloud.gateway.filter.NettyRoutingFilter@1fbd5e0": 2147483647,
+ "org.springframework.cloud.gateway.filter.ForwardPathFilter@33a71d23": 0,
+ "org.springframework.cloud.gateway.filter.AdaptCachedBodyGlobalFilter@135064ea": 2147483637,
+ "org.springframework.cloud.gateway.filter.WebsocketRoutingFilter@23c05889": 2147483646
+}The response contains details of the global filters in place. For each global filter is provided the string representation of the filter object (e.g., org.springframework.cloud.gateway.filter.LoadBalancerClientFilter@77856cc5) and the corresponding order in the filter chain.
To retrieve the GatewayFilter factories applied to routes, make a GET request to /actuator/gateway/routefilters. The resulting response is similar to the following:
{
+ "[AddRequestHeaderGatewayFilterFactory@570ed9c configClass = AbstractNameValueGatewayFilterFactory.NameValueConfig]": null,
+ "[SecureHeadersGatewayFilterFactory@fceab5d configClass = Object]": null,
+ "[SaveSessionGatewayFilterFactory@4449b273 configClass = Object]": null
+}The response contains details of the GatewayFilter factories applied to any particular route. For each factory is provided the string representation of the corresponding object (e.g., [SecureHeadersGatewayFilterFactory@fceab5d configClass = Object]). Note that the null value is due to an incomplete implementation of the endpoint controller, for that it tries to set the order of the object in the filter chain, which does not apply to a GatewayFilter factory object.
To clear the routes cache, make a POST request to /actuator/gateway/refresh. The request returns a 200 without response body.
To retrieve the routes defined in the gateway, make a GET request to /actuator/gateway/routes. The resulting response is similar to the following:
[{
+ "route_id": "first_route",
+ "route_object": {
+ "predicate": "org.springframework.cloud.gateway.handler.predicate.PathRoutePredicateFactory$$Lambda$432/1736826640@1e9d7e7d",
+ "filters": [
+ "OrderedGatewayFilter{delegate=org.springframework.cloud.gateway.filter.factory.PreserveHostHeaderGatewayFilterFactory$$Lambda$436/674480275@6631ef72, order=0}"
+ ]
+ },
+ "order": 0
+},
+{
+ "route_id": "second_route",
+ "route_object": {
+ "predicate": "org.springframework.cloud.gateway.handler.predicate.PathRoutePredicateFactory$$Lambda$432/1736826640@cd8d298",
+ "filters": []
+ },
+ "order": 0
+}]The response contains details of all the routes defined in the gateway. The following table describes the structure of each element (i.e., a route) of the response.
| Path | Type | Description |
|---|---|---|
| String | The route id. |
| Object | The route predicate. |
| Array | The GatewayFilter factories applied to the route. |
| Number | The route order. |
To retrieve information about a single route, make a GET request to /actuator/gateway/routes/{id} (e.g., /actuator/gateway/routes/first_route). The resulting response is similar to the following:
{
+ "id": "first_route",
+ "predicates": [{
+ "name": "Path",
+ "args": {"_genkey_0":"/first"}
+ }],
+ "filters": [],
+ "uri": "http://www.uri-destination.org",
+ "order": 0
+}]The following table describes the structure of the response.
| Path | Type | Description |
|---|---|---|
| String | The route id. |
| Array | The collection of route predicates. Each item defines the name and the arguments of a given predicate. |
| Array | The collection of filters applied to the route. |
| String | The destination URI of the route. |
| Number | The route order. |
To create a route, make a POST request to /gateway/routes/{id_route_to_create} with a JSON body that specifies the fields of the route (see the previous subsection).
To delete a route, make a DELETE request to /gateway/routes/{id_route_to_delete}.
The table below summarises the Spring Cloud Gateway actuator endpoints. Note that each endpoint has /actuator/gateway as the base-path.
| ID | HTTP Method | Description |
|---|---|---|
| GET | Displays the list of global filters applied to the routes. |
| GET | Displays the list of GatewayFilter factories applied to a particular route. |
| POST | Clears the routes cache. |
| GET | Displays the list of routes defined in the gateway. |
| GET | Displays information about a particular route. |
| POST | Add a new route to the gateway. |
| DELETE | Remove an existing route from the gateway. |