| // Copyright Istio Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package xds |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pilot/pkg/model" |
| "github.com/apache/dubbo-go-pixiu/pkg/config" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/schema/gvk" |
| ) |
| |
| type CdsGenerator struct { |
| Server *DiscoveryServer |
| } |
| |
| var _ model.XdsDeltaResourceGenerator = &CdsGenerator{} |
| |
| // Map of all configs that do not impact CDS |
| var skippedCdsConfigs = map[config.GroupVersionKind]struct{}{ |
| gvk.Gateway: {}, |
| gvk.WorkloadEntry: {}, |
| gvk.WorkloadGroup: {}, |
| gvk.AuthorizationPolicy: {}, |
| gvk.RequestAuthentication: {}, |
| gvk.Secret: {}, |
| gvk.Telemetry: {}, |
| gvk.WasmPlugin: {}, |
| gvk.ProxyConfig: {}, |
| } |
| |
| // Map all configs that impacts CDS for gateways. |
| var pushCdsGatewayConfig = map[config.GroupVersionKind]struct{}{ |
| gvk.VirtualService: {}, |
| gvk.Gateway: {}, |
| } |
| |
| func cdsNeedsPush(req *model.PushRequest, proxy *model.Proxy) bool { |
| if req == nil { |
| return true |
| } |
| if !req.Full { |
| // CDS only handles full push |
| return false |
| } |
| // If none set, we will always push |
| if len(req.ConfigsUpdated) == 0 { |
| return true |
| } |
| for config := range req.ConfigsUpdated { |
| if proxy.Type == model.Router { |
| if _, f := pushCdsGatewayConfig[config.Kind]; f { |
| return true |
| } |
| } |
| |
| if _, f := skippedCdsConfigs[config.Kind]; !f { |
| return true |
| } |
| } |
| return false |
| } |
| |
| func (c CdsGenerator) Generate(proxy *model.Proxy, w *model.WatchedResource, req *model.PushRequest) (model.Resources, model.XdsLogDetails, error) { |
| if !cdsNeedsPush(req, proxy) { |
| return nil, model.DefaultXdsLogDetails, nil |
| } |
| clusters, logs := c.Server.ConfigGenerator.BuildClusters(proxy, req) |
| return clusters, logs, nil |
| } |
| |
| // GenerateDeltas for CDS currently only builds deltas when services change. todo implement changes for DestinationRule, etc |
| func (c CdsGenerator) GenerateDeltas(proxy *model.Proxy, req *model.PushRequest, |
| w *model.WatchedResource) (model.Resources, model.DeletedResources, model.XdsLogDetails, bool, error) { |
| if !cdsNeedsPush(req, proxy) { |
| return nil, nil, model.DefaultXdsLogDetails, false, nil |
| } |
| updatedClusters, removedClusters, logs, usedDelta := c.Server.ConfigGenerator.BuildDeltaClusters(proxy, req, w) |
| return updatedClusters, removedClusters, logs, usedDelta, nil |
| } |