AWS Documentation » AWS App Mesh » User Guide » Routes

Routes

A route is associated with a virtual router, and it's used to match requests for a virtual router and distribute traffic accordingly to its associated virtual nodes.

You can use the prefix parameter in your route specification for path-based routing of requests. For example, if your virtual service name is my-service.local and you want the route to match requests to my-service.local/metrics, your prefix should be /metrics.

If your route matches a request, you can distribute traffic to one or more target virtual nodes with relative weighting.

Creating a Route

This topic helps you to create a route in your service mesh.

Creating a route in the AWS Management Console.

1. Open the App Mesh console at https://console.aws.amazon.com/appmesh/.

2. Choose the mesh that you want to create the route in.

3. Choose Virtual routers in the left navigation.

4. Choose the router that you want to associate a new route with.

5. In the Routes table, choose Create route.

6. For Route name, specify the name to use for your route.

7. For Route type, choose the protocol for your route.

8. For Virtual node name, choose the virtual node that this route will serve traffic to.

9. For Weight, choose a relative weight for the route. The total weight for all routes must be less than 100.

10. To use HTTP path-based routing, choose Additional configuration and then specify the path that the route should match. For example, if your virtual service name is my-service.local and you want the route to match requests to my-service.local/metrics, your prefix should be /metrics.

11. Choose Create route to finish.

Creating a route in the AWS CLI.

• The following JSON represents a route named serviceB-route for the virtual router serviceB. This route directs traffic to two virtual nodes: 90% to serviceBv1 and 10% to serviceBv2. This canary-style deployment allows you to test a new version of your service with a small amount of traffic to decrease the blast radius of new service code.

  {
    "meshName": "simpleapp",
    "routeName": "serviceB-route",
    "spec": {
      "httpRoute": {
        "action": {
          "weightedTargets": [
            {
              "virtualNode": "serviceBv1",
              "weight": 90
            },
            {
              "virtualNode": "serviceBv2",
              "weight": 10
            }
          ]
        },
        "match": {
          "prefix": "/"
        }
      }
    },
    "virtualRouterName": "serviceB"
  }

  If you save the preceding JSON as a file, you can create the route with the following AWS CLI command.

  aws appmesh create-route --cli-input-json file://serviceB-routes.json

  Note

  You must use at least version 1.16.178 of the AWS CLI with App Mesh. To install the latest version of the AWS CLI, see Installing the AWS Command Line Interface in the AWS Command Line Interface User Guide.

  For more information about creating routes with the AWS CLI, see create-route in the AWS Command Line Interface User Guide.