Master Dubbo Service Governance: Dynamic Routing, Config & Mocking

01 Service Information

Dubbo displays services by interface, separating them by registration source at the interface‑level or application‑level. The service detail page lists provider and consumer information together with method signatures.

02 Dynamic Routing

Conditional Routing lets you write custom rules for service governance scenarios such as black‑/white‑lists or read‑write separation. Rules can be created at the interface level or for a specific consumer application. Example: a blacklist rule where the consumer IP 192.168.1.3 matches no provider.

Tag Routing groups providers under a common tag, restricting traffic to that group. This enables blue‑green or gray releases. Example configuration:

dubbo.provider.tag=tag1

@DubboService(tag = "tag2")

Mesh Routing (Dubbo 3.0) splits traffic management into VirtualService (inbound) and DestinationRule (outbound). The following YAML routes calls to HelloService#hi(Integer) based on whether the argument is even or odd:

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/oddEvenRouter
spec:
  dubbo:
  - routedetail:
    - match:
      - method:
          argc: 1
          args:
          - index: 0
            num_value:
              oneof:
              - exact: 0.0
                mod: 2.0
            type: int
          name_match:
            exact: hi
      name: even-route
      route:
      - destination:
          host: demo
          subset: v1
    - match:
      - method:
          argc: 1
          args:
          - index: 0
            num_value:
              oneof:
              - exact: 1.0
                mod: 2.0
            type: int
          name_match:
            exact: hi
      name: odd-route
      route:
      - destination:
          host: demo2
          subset: v2
  services:
  - exact: org.test.apache.dubbo.interfaces.HelloService
---
apiVersion: service.dubbo.apache.org/v1alpha1
kind: DestinationRule
metadata:
  name: test-route
spec:
  host: demo
  subsets:
    - name: v1
      labels:
        test-version: v1
    - name: v2
      labels:
        test-version: v2

03 Dynamic Configuration

Dubbo allows runtime adjustment of RPC behavior without restarting services, such as changing timeout, weight, or load‑balancing strategy. The example below sets the consumer‑side timeout to 6000 ms.

04 Service Testing

Use the admin console to test Dubbo services; request parameters are auto‑generated as a JSON template based on service metadata.

05 Service Mock

Configure mock rules in the admin UI and enable them by adding the JVM flag -Denable.dubbo.admin.mock=true. This allows a consumer to receive mock responses when no provider is available.

<dependency>
    <groupId>org.apache.dubbo.extensions</groupId>
    <artifactId>dubbo-mock-admin</artifactId>
    <version>last</version>
</dependency>

06 New Features

Application‑level service discovery

Mesh routing

Service mock

Permission SPI extension

07 Related Links

Official documentation: https://dubbo.apache.org/zh/docs/advanced/routing-rule/

Traffic management concepts: https://dubbo.apache.org/zh/docs/concepts/traffic-management/