Gateway routing configuration

Route configuration

• Basic routing configuration
• Code-based routing configuration
• Routing configuration combined with registry

Routing is the basic module of gateway configuration, similar to Zuul's routing configuration module.A Route module is defined by an ID, a target URI, a set of assertions, and a set of filters.If the assertion is true, the route matches and the target URI is accessed.

Basic routing configuration

If the target address of the request is a single URI resource path, the configuration file example is as follows.

spring:application:name: api-gatewaycloud:gateway:routes:- id: service1uri: https://blog.csdn.netpredicates:-Path=/csdn

The meaning of each field is as follows.

• id: our custom routing ID, keep it unique
• uri: target service address
• predicates: routing conditions, Predicate accepts an input parameter and returns a boolean result.The interface contains several default methods to combine Predicates into other complex logic (eg: AND, OR, NOT).

The above configuration means that a URI proxy rule with an id of url-proxy-1 is configured. The routing rule is that when the address http://localhost:8080/csdn is accessed, it will be routed to the address https://blog.csdn.net.

Code-based routing configuration

The forwarding function can also be implemented by code. We can add the method customRouteLocator() in the startup class GateWayApplication to customize the forwarding rules.

@[email protected] class GatewayApplication {public static void main(String[] args) {SpringApplication.run(GatewayApplication.class, args);}@Beanpublic RouteLocator customRouteLocator(RouteLocatorBuilder builder) {return builder.routes().route("path_route", r -> r.path("/csdn").uri("https://blog.csdn.net")).build();}}

Routing configuration method combined with registry

The schema protocol part of the uri is a custom lb: type, which means that the service is subscribed from the microservice registry (such as Eureka), and the service is routed through load balancing.code show as below.

server:port: 8080spring:application:name: api-gatewaycloud:gateway:routes:- id: service1# uri: http://127.0.0.1:9001uri: lb://cloud-payment-servicepredicates:- Path=/payment/**eureka:client:service-url:defaultZone: http://127.0.0.1:9004/eureka

Note: Here cloud-payment-service is a pre-registered service, and two ports 9000 and 9001 are open for use.

The routing configuration method combined with the registry is actually very different from the routing configuration of a single URI, only the schema protocol of the URI is different.The schema protocol of the address of a single URI, usually the http or https protocol.Start multiple payment microservices, and you will find that ports 9000 and 9001 appear in turn.

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