| // 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 envoyfilter |
| |
| import ( |
| "fmt" |
| ) |
| |
| import ( |
| network "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" |
| ) |
| |
| // EnvoyPatchAnalyzer checks envoyFilters to see if the patch section is okay |
| type EnvoyPatchAnalyzer struct{} |
| |
| // (compile-time check that we implement the interface) |
| var _ analysis.Analyzer = &EnvoyPatchAnalyzer{} |
| |
| // Metadata implements analysis.Analyzer |
| func (*EnvoyPatchAnalyzer) Metadata() analysis.Metadata { |
| return analysis.Metadata{ |
| Name: "envoyfilter.EnvoyPatchAnalyzer", |
| Description: "Checks an envoyFilters ", |
| Inputs: collection.Names{ |
| collections.IstioNetworkingV1Alpha3Envoyfilters.Name(), |
| }, |
| } |
| } |
| |
| // Analyze implements analysis.Analyzer |
| func (s *EnvoyPatchAnalyzer) Analyze(c analysis.Context) { |
| c.ForEach(collections.IstioNetworkingV1Alpha3Envoyfilters.Name(), func(r *resource.Instance) bool { |
| s.analyzeEnvoyFilterPatch(r, c) |
| return true |
| }) |
| } |
| |
| func (*EnvoyPatchAnalyzer) analyzeEnvoyFilterPatch(r *resource.Instance, c analysis.Context) { |
| ef := r.Message.(*network.EnvoyFilter) |
| |
| // if the envoyFilter does not have a priority and it uses the INSERT_BEFORE or INSERT_AFTER |
| // then it can have issues if its using an operation that is relative to another filter. |
| // the default priority for an envoyFilter is 0 |
| if ef.Priority == 0 { |
| for index, patch := range ef.ConfigPatches { |
| if patch.Patch.Operation == network.EnvoyFilter_Patch_INSERT_BEFORE || patch.Patch.Operation == network.EnvoyFilter_Patch_INSERT_AFTER { |
| // indicate that this envoy filter does not have a priority and has a relative patch |
| // operation set which can cause issues. Indicate a warning to the use to use a |
| // priority to ensure its placed after something or use the INSERT_FIRST option to |
| // ensure its always done first |
| message := msg.NewEnvoyFilterUsesRelativeOperation(r) |
| |
| if line, ok := util.ErrorLine(r, fmt.Sprintf(util.EnvoyFilterConfigPath, index)); ok { |
| message.Line = line |
| } |
| |
| c.Report(collections.IstioNetworkingV1Alpha3Envoyfilters.Name(), message) |
| } |
| } |
| } |
| } |