istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pilot/pkg/networking/grpcgen/rds.go (about) 1 // Copyright Istio Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package grpcgen 16 17 import ( 18 route "github.com/envoyproxy/go-control-plane/envoy/config/route/v3" 19 discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3" 20 21 "istio.io/istio/pilot/pkg/model" 22 "istio.io/istio/pilot/pkg/networking/core" 23 "istio.io/istio/pilot/pkg/util/protoconv" 24 ) 25 26 // BuildHTTPRoutes supports per-VIP routes, as used by GRPC. 27 // This mode is indicated by using names containing full host:port instead of just port. 28 // Returns true of the request is of this type. 29 func (g *GrpcConfigGenerator) BuildHTTPRoutes(node *model.Proxy, push *model.PushContext, routeNames []string) model.Resources { 30 resp := model.Resources{} 31 for _, routeName := range routeNames { 32 if rc := buildHTTPRoute(node, push, routeName); rc != nil { 33 resp = append(resp, &discovery.Resource{ 34 Name: routeName, 35 Resource: protoconv.MessageToAny(rc), 36 }) 37 } 38 } 39 return resp 40 } 41 42 func buildHTTPRoute(node *model.Proxy, push *model.PushContext, routeName string) *route.RouteConfiguration { 43 // TODO use route-style naming instead of cluster naming 44 _, _, hostname, port := model.ParseSubsetKey(routeName) 45 if hostname == "" || port == 0 { 46 log.Warnf("failed to parse %v", routeName) 47 return nil 48 } 49 50 virtualHosts, _, _ := core.BuildSidecarOutboundVirtualHosts(node, push, routeName, port, nil, &model.DisabledCache{}) 51 52 // Only generate the required route for grpc. Will need to generate more 53 // as GRPC adds more features. 54 return &route.RouteConfiguration{ 55 Name: routeName, 56 VirtualHosts: virtualHosts, 57 } 58 }