| // 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" |
| "strings" |
| ) |
| |
| 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" |
| ) |
| |
| // ConflictingMeshGatewayHostsAnalyzer checks if multiple virtual services |
| // associated with the mesh gateway have conflicting hosts. The behavior is |
| // undefined if conflicts exist. |
| type ConflictingMeshGatewayHostsAnalyzer struct{} |
| |
| var _ analysis.Analyzer = &ConflictingMeshGatewayHostsAnalyzer{} |
| |
| // Metadata implements Analyzer |
| func (c *ConflictingMeshGatewayHostsAnalyzer) Metadata() analysis.Metadata { |
| return analysis.Metadata{ |
| Name: "virtualservice.ConflictingMeshGatewayHostsAnalyzer", |
| Description: "Checks if multiple virtual services associated with the mesh gateway have conflicting hosts", |
| Inputs: collection.Names{ |
| collections.IstioNetworkingV1Alpha3Virtualservices.Name(), |
| }, |
| } |
| } |
| |
| // Analyze implements Analyzer |
| func (c *ConflictingMeshGatewayHostsAnalyzer) Analyze(ctx analysis.Context) { |
| hs := initMeshGatewayHosts(ctx) |
| for scopedFqdn, vsList := range hs { |
| if len(vsList) > 1 { |
| vsNames := combineResourceEntryNames(vsList) |
| for i := range vsList { |
| |
| m := msg.NewConflictingMeshGatewayVirtualServiceHosts(vsList[i], vsNames, string(scopedFqdn)) |
| |
| if line, ok := util.ErrorLine(vsList[i], fmt.Sprintf(util.MetadataName)); ok { |
| m.Line = line |
| } |
| |
| ctx.Report(collections.IstioNetworkingV1Alpha3Virtualservices.Name(), m) |
| } |
| } |
| } |
| } |
| |
| func combineResourceEntryNames(rList []*resource.Instance) string { |
| names := make([]string, 0, len(rList)) |
| for _, r := range rList { |
| names = append(names, r.Metadata.FullName.String()) |
| } |
| return strings.Join(names, ",") |
| } |
| |
| func initMeshGatewayHosts(ctx analysis.Context) map[util.ScopedFqdn][]*resource.Instance { |
| hostsVirtualServices := map[util.ScopedFqdn][]*resource.Instance{} |
| ctx.ForEach(collections.IstioNetworkingV1Alpha3Virtualservices.Name(), func(r *resource.Instance) bool { |
| vs := r.Message.(*v1alpha3.VirtualService) |
| vsNamespace := r.Metadata.FullName.Namespace |
| vsAttachedToMeshGateway := false |
| // No entry in gateways imply "mesh" by default |
| if len(vs.Gateways) == 0 { |
| vsAttachedToMeshGateway = true |
| } else { |
| for _, g := range vs.Gateways { |
| if g == util.MeshGateway { |
| vsAttachedToMeshGateway = true |
| } |
| } |
| } |
| if vsAttachedToMeshGateway { |
| // determine the scope of hosts i.e. local to VirtualService namespace or |
| // all namespaces |
| hostsNamespaceScope := vsNamespace |
| exportToAllNamespaces := util.IsExportToAllNamespaces(vs.ExportTo) |
| if exportToAllNamespaces { |
| hostsNamespaceScope = util.ExportToAllNamespaces |
| } |
| |
| for _, h := range vs.Hosts { |
| scopedFqdn := util.NewScopedFqdn(string(hostsNamespaceScope), vsNamespace, h) |
| vsNames := hostsVirtualServices[scopedFqdn] |
| if len(vsNames) == 0 { |
| hostsVirtualServices[scopedFqdn] = []*resource.Instance{r} |
| } else { |
| hostsVirtualServices[scopedFqdn] = append(hostsVirtualServices[scopedFqdn], r) |
| } |
| } |
| } |
| return true |
| }) |
| return hostsVirtualServices |
| } |