| // 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 virtualservice |
| |
| import ( |
| "fmt" |
| ) |
| |
| import ( |
| "istio.io/api/networking/v1alpha3" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/config/analysis" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/analysis/analyzers/util" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/analysis/msg" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/resource" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/schema/collection" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/schema/collections" |
| ) |
| |
| // DestinationRuleAnalyzer checks the destination rules associated with each virtual service |
| type DestinationRuleAnalyzer struct{} |
| |
| var _ analysis.Analyzer = &DestinationRuleAnalyzer{} |
| |
| // Metadata implements Analyzer |
| func (d *DestinationRuleAnalyzer) Metadata() analysis.Metadata { |
| return analysis.Metadata{ |
| Name: "virtualservice.DestinationRuleAnalyzer", |
| Description: "Checks the destination rules associated with each virtual service", |
| Inputs: collection.Names{ |
| collections.IstioNetworkingV1Alpha3Virtualservices.Name(), |
| collections.IstioNetworkingV1Alpha3Destinationrules.Name(), |
| }, |
| } |
| } |
| |
| // Analyze implements Analyzer |
| func (d *DestinationRuleAnalyzer) Analyze(ctx analysis.Context) { |
| // To avoid repeated iteration, precompute the set of existing destination host+subset combinations |
| destHostsAndSubsets := initDestHostsAndSubsets(ctx) |
| |
| ctx.ForEach(collections.IstioNetworkingV1Alpha3Virtualservices.Name(), func(r *resource.Instance) bool { |
| d.analyzeVirtualService(r, ctx, destHostsAndSubsets) |
| return true |
| }) |
| } |
| |
| func (d *DestinationRuleAnalyzer) analyzeVirtualService(r *resource.Instance, ctx analysis.Context, |
| destHostsAndSubsets map[hostAndSubset]bool) { |
| vs := r.Message.(*v1alpha3.VirtualService) |
| ns := r.Metadata.FullName.Namespace |
| |
| for _, ad := range getRouteDestinations(vs) { |
| if !d.checkDestinationSubset(ns, ad.Destination, destHostsAndSubsets) { |
| |
| m := msg.NewReferencedResourceNotFound(r, "host+subset in destinationrule", |
| fmt.Sprintf("%s+%s", ad.Destination.GetHost(), ad.Destination.GetSubset())) |
| |
| key := fmt.Sprintf(util.DestinationHost, ad.RouteRule, ad.ServiceIndex, ad.DestinationIndex) |
| if line, ok := util.ErrorLine(r, key); ok { |
| m.Line = line |
| } |
| |
| ctx.Report(collections.IstioNetworkingV1Alpha3Virtualservices.Name(), m) |
| } |
| } |
| |
| for _, ad := range getHTTPMirrorDestinations(vs) { |
| if !d.checkDestinationSubset(ns, ad.Destination, destHostsAndSubsets) { |
| |
| m := msg.NewReferencedResourceNotFound(r, "mirror+subset in destinationrule", |
| fmt.Sprintf("%s+%s", ad.Destination.GetHost(), ad.Destination.GetSubset())) |
| |
| key := fmt.Sprintf(util.MirrorHost, ad.ServiceIndex) |
| if line, ok := util.ErrorLine(r, key); ok { |
| m.Line = line |
| } |
| |
| ctx.Report(collections.IstioNetworkingV1Alpha3Virtualservices.Name(), m) |
| } |
| } |
| } |
| |
| func (d *DestinationRuleAnalyzer) checkDestinationSubset(vsNamespace resource.Namespace, destination *v1alpha3.Destination, |
| destHostsAndSubsets map[hostAndSubset]bool) bool { |
| name := util.GetResourceNameFromHost(vsNamespace, destination.GetHost()) |
| subset := destination.GetSubset() |
| |
| // if there's no subset specified, we're done |
| if subset == "" { |
| return true |
| } |
| |
| hs := hostAndSubset{ |
| host: name, |
| subset: subset, |
| } |
| if _, ok := destHostsAndSubsets[hs]; ok { |
| return true |
| } |
| |
| return false |
| } |
| |
| func initDestHostsAndSubsets(ctx analysis.Context) map[hostAndSubset]bool { |
| hostsAndSubsets := make(map[hostAndSubset]bool) |
| ctx.ForEach(collections.IstioNetworkingV1Alpha3Destinationrules.Name(), func(r *resource.Instance) bool { |
| dr := r.Message.(*v1alpha3.DestinationRule) |
| drNamespace := r.Metadata.FullName.Namespace |
| |
| for _, ss := range dr.GetSubsets() { |
| hs := hostAndSubset{ |
| host: util.GetResourceNameFromHost(drNamespace, dr.GetHost()), |
| subset: ss.GetName(), |
| } |
| hostsAndSubsets[hs] = true |
| } |
| return true |
| }) |
| return hostsAndSubsets |
| } |