jasonmccallister / envoy-xds-types

Go types useful when creating Envoy XDS API responses

Envoy XDS Types

This package provides the Go types for the Envoy XDS APIs.

Creating an XDS API Cluster REST Discovery Response

To create a CDS response, use the cluster.NewResponse func.

package main

import (
	"encoding/json"
	"log"

	"github.com/jasonmccallister/envoy-xds-types/cluster"
)

func main() {
	// create the cluster resources
	resources := []cluster.Resource{
		{
			ResourceType:    "type.googleapis.com/envoy.config.cluster.v3.Cluster",
			Type:            "LOGICAL_DNS",
			Name:            "cluster_name",
			DNSLookupFamily: "V4_ONLY",
			LoadAssignment: cluster.LoadAssignment{
				ClusterName: "cluster_name",
				Endpoints: []cluster.Endpoints{
					{
						LbEndpoints: cluster.LBEndpoints{
							Endpoint: cluster.LBEndpoint{
								HealthCheckConfig: &cluster.HealthCheckConfig{
									Hostname:  "example.com",
									PortValue: 443,
								},
								Address: cluster.Address{
									SocketAddress: cluster.SocketAddress{
										Address:   "example.com",
										PortValue: 443,
									},
								},
							},
						},
					},
				},
			},
			TransportSocket: &cluster.TransportSocket{
				Name: "envoy.transport_sockets.tls",
				TypedConfig: cluster.TransportSocketTypedConfig{
					Type: "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.UpstreamTlsContext",
					SNI:  "example.com",
				},
			},
		},
	}

	// generate the cluster response with those resources
	response := cluster.NewResponse("V3", cluster.ControlPlane{Identifier: "control-plane-id"}, resources)

	// marshal the response to JSON
	data, err := json.Marshal(response)
	if err != nil {
		log.Fatal("Error marshalling response: ", err)
	}

	// return the response
}