| // 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 gateway |
| |
| import ( |
| "fmt" |
| "strconv" |
| "strings" |
| ) |
| |
| import ( |
| "istio.io/api/networking/v1alpha3" |
| k8s_labels "k8s.io/apimachinery/pkg/labels" |
| ) |
| |
| 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/host" |
| "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" |
| ) |
| |
| // ConflictingGatewayAnalyzer checks a gateway's selector, port number and hosts. |
| type ConflictingGatewayAnalyzer struct{} |
| |
| // (compile-time check that we implement the interface) |
| var _ analysis.Analyzer = &ConflictingGatewayAnalyzer{} |
| |
| // Metadata implements analysis.Analyzer |
| func (*ConflictingGatewayAnalyzer) Metadata() analysis.Metadata { |
| return analysis.Metadata{ |
| Name: "gateway.ConflictingGatewayAnalyzer", |
| Description: "Checks a gateway's selector, port number and hosts", |
| Inputs: collection.Names{ |
| collections.IstioNetworkingV1Alpha3Gateways.Name(), |
| }, |
| } |
| } |
| |
| // Analyze implements analysis.Analyzer |
| func (s *ConflictingGatewayAnalyzer) Analyze(c analysis.Context) { |
| gwConflictingMap := initGatewaysMap(c) |
| c.ForEach(collections.IstioNetworkingV1Alpha3Gateways.Name(), func(r *resource.Instance) bool { |
| s.analyzeGateway(r, c, gwConflictingMap) |
| return true |
| }) |
| } |
| |
| func (*ConflictingGatewayAnalyzer) analyzeGateway(r *resource.Instance, c analysis.Context, |
| gwCMap map[string]map[string][]string) { |
| gw := r.Message.(*v1alpha3.Gateway) |
| gwName := r.Metadata.FullName.String() |
| // For pods selected by gw.Selector, find Services that select them and remember those ports |
| gwSelector := k8s_labels.SelectorFromSet(gw.Selector) |
| sGWSelector := gwSelector.String() |
| |
| // Check non-exist gateway with particular selector |
| isExists := false |
| for gwmKey := range gwCMap { |
| if strings.Contains(gwmKey, sGWSelector) { |
| isExists = true |
| break |
| } |
| } |
| if sGWSelector != "" && !isExists { |
| m := msg.NewReferencedResourceNotFound(r, "selector", sGWSelector) |
| label := util.ExtractLabelFromSelectorString(sGWSelector) |
| if line, ok := util.ErrorLine(r, fmt.Sprintf(util.GatewaySelector, label)); ok { |
| m.Line = line |
| } |
| c.Report(collections.IstioNetworkingV1Alpha3Gateways.Name(), m) |
| return |
| } |
| |
| for _, server := range gw.Servers { |
| var rmsg []string |
| conflictingGWMatch := 0 |
| sPortNumber := strconv.Itoa(int(server.Port.Number)) |
| mapKey := genGatewayMapKey(sGWSelector, sPortNumber) |
| for gwNameKey, gwHostsValue := range gwCMap[mapKey] { |
| for _, gwHost := range server.Hosts { |
| // both selector and portnumber are the same, then check hosts |
| if isGWsHostMatched(gwHost, gwHostsValue) { |
| if gwName != gwNameKey { |
| conflictingGWMatch++ |
| rmsg = append(rmsg, gwNameKey) |
| } |
| } |
| } |
| } |
| if conflictingGWMatch > 0 { |
| reportMsg := strings.Join(rmsg, ",") |
| hostsMsg := strings.Join(server.Hosts, ",") |
| m := msg.NewConflictingGateways(r, reportMsg, sGWSelector, sPortNumber, hostsMsg) |
| c.Report(collections.IstioNetworkingV1Alpha3Gateways.Name(), m) |
| } |
| } |
| } |
| |
| // isGWsHostMatched implements gateway's hosts match |
| func isGWsHostMatched(gwInstance string, gwHostList []string) bool { |
| gwInstanceNamed := host.Name(gwInstance) |
| for _, gwElem := range gwHostList { |
| gwElemNamed := host.Name(gwElem) |
| if gwInstanceNamed.Matches(gwElemNamed) { |
| return true |
| } |
| } |
| return false |
| } |
| |
| // initGatewaysMap implements initilization for gateways Map |
| func initGatewaysMap(ctx analysis.Context) map[string]map[string][]string { |
| gwConflictingMap := make(map[string]map[string][]string) |
| ctx.ForEach(collections.IstioNetworkingV1Alpha3Gateways.Name(), func(r *resource.Instance) bool { |
| gw := r.Message.(*v1alpha3.Gateway) |
| gwName := r.Metadata.FullName.String() |
| |
| gwSelector := k8s_labels.SelectorFromSet(gw.Selector) |
| sGWSelector := gwSelector.String() |
| for _, server := range gw.Servers { |
| sPortNumber := strconv.Itoa(int(server.Port.Number)) |
| mapKey := genGatewayMapKey(sGWSelector, sPortNumber) |
| if _, exits := gwConflictingMap[mapKey]; !exits { |
| objMap := make(map[string][]string) |
| objMap[gwName] = server.Hosts |
| gwConflictingMap[mapKey] = objMap |
| } else { |
| gwConflictingMap[mapKey][gwName] = server.Hosts |
| } |
| } |
| return true |
| }) |
| return gwConflictingMap |
| } |
| |
| func genGatewayMapKey(selector, portNumber string) string { |
| key := selector + "~" + portNumber |
| return key |
| } |