| // 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 compare |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "io" |
| ) |
| |
| import ( |
| adminapi "github.com/envoyproxy/go-control-plane/envoy/admin/v3" |
| xdsapi "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/istioctl/pkg/util/configdump" |
| ) |
| |
| // Comparator diffs between a config dump from Istiod and one from Envoy |
| type Comparator struct { |
| envoy, istiod *configdump.Wrapper |
| w io.Writer |
| context int |
| location string |
| } |
| |
| // NewComparator is a comparator constructor |
| func NewComparator(w io.Writer, istiodResponses map[string][]byte, envoyResponse []byte) (*Comparator, error) { |
| c := &Comparator{} |
| for _, resp := range istiodResponses { |
| istiodDump := &configdump.Wrapper{} |
| err := json.Unmarshal(resp, istiodDump) |
| if err != nil { |
| continue |
| } |
| c.istiod = istiodDump |
| break |
| } |
| if c.istiod == nil { |
| return nil, fmt.Errorf("unable to find config dump in Istiod responses") |
| } |
| envoyDump := &configdump.Wrapper{} |
| err := json.Unmarshal(envoyResponse, envoyDump) |
| if err != nil { |
| return nil, err |
| } |
| c.envoy = envoyDump |
| c.w = w |
| c.context = 7 |
| c.location = "Local" // the time.Location for formatting time.Time instances |
| return c, nil |
| } |
| |
| // NewXdsComparator is a comparator constructor |
| func NewXdsComparator(w io.Writer, istiodResponses map[string]*xdsapi.DiscoveryResponse, envoyResponse []byte) (*Comparator, error) { |
| c := &Comparator{} |
| for _, resp := range istiodResponses { |
| if len(resp.Resources) > 0 { |
| c.istiod = &configdump.Wrapper{ |
| ConfigDump: &adminapi.ConfigDump{ |
| Configs: resp.Resources, |
| }, |
| } |
| break |
| } |
| } |
| if c.istiod == nil { |
| return nil, fmt.Errorf("unable to find config dump in Istiod responses") |
| } |
| envoyDump := &configdump.Wrapper{} |
| err := json.Unmarshal(envoyResponse, envoyDump) |
| if err != nil { |
| return nil, err |
| } |
| c.envoy = envoyDump |
| c.w = w |
| c.context = 7 |
| c.location = "Local" // the time.Location for formatting time.Time instances |
| return c, nil |
| } |
| |
| // Diff prints a diff between Istiod and Envoy to the passed writer |
| func (c *Comparator) Diff() error { |
| if err := c.ClusterDiff(); err != nil { |
| return err |
| } |
| if err := c.ListenerDiff(); err != nil { |
| return err |
| } |
| return c.RouteDiff() |
| } |