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Merge pull request #3686 from Shopify/dbg-tool
Add debug binary to the docker image
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| /* | ||
| Copyright 2019 The Kubernetes 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 main | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "github.com/spf13/cobra" | ||
| "k8s.io/ingress-nginx/internal/nginx" | ||
| "os" | ||
| ) | ||
|
|
||
| const ( | ||
| backendsPath = "/configuration/backends" | ||
| generalPath = "/configuration/general" | ||
| ) | ||
|
|
||
| func main() { | ||
| rootCmd := &cobra.Command{ | ||
| Use: "dbg", | ||
| Short: "dbg is a tool for quickly inspecting the state of the nginx instance", | ||
| } | ||
|
|
||
| backendsCmd := &cobra.Command{ | ||
| Use: "backends", | ||
| Short: "Inspect the dynamically-loaded backends information", | ||
| } | ||
| rootCmd.AddCommand(backendsCmd) | ||
|
|
||
| backendsAllCmd := &cobra.Command{ | ||
| Use: "all", | ||
| Short: "Output the all dynamic backend information as a JSON array", | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| backendsAll() | ||
| }, | ||
| } | ||
| backendsCmd.AddCommand(backendsAllCmd) | ||
|
|
||
| backendsListCmd := &cobra.Command{ | ||
| Use: "list", | ||
| Short: "Output a newline-separated list of the backend names", | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| backendsList() | ||
| }, | ||
| } | ||
| backendsCmd.AddCommand(backendsListCmd) | ||
|
|
||
| backendsGetCmd := &cobra.Command{ | ||
| Use: "get [backend name]", | ||
| Short: "Output the backend information only for the backend that has this name", | ||
| Args: cobra.ExactArgs(1), | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| backendsGet(args[0]) | ||
| }, | ||
| } | ||
| backendsCmd.AddCommand(backendsGetCmd) | ||
|
|
||
| generalCmd := &cobra.Command{ | ||
| Use: "general", | ||
| Short: "Output the general dynamic lua state", | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| general() | ||
| }, | ||
| } | ||
| rootCmd.AddCommand(generalCmd) | ||
|
|
||
| confCmd := &cobra.Command{ | ||
| Use: "conf", | ||
| Short: "Dump the contents of /etc/nginx/nginx.conf", | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| readNginxConf() | ||
| }, | ||
| } | ||
| rootCmd.AddCommand(confCmd) | ||
|
|
||
| if err := rootCmd.Execute(); err != nil { | ||
| fmt.Println(err) | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| func backendsAll() { | ||
| statusCode, body, requestErr := nginx.NewGetStatusRequest(backendsPath) | ||
| if requestErr != nil { | ||
| fmt.Println(requestErr) | ||
| return | ||
| } | ||
| if statusCode != 200 { | ||
| fmt.Printf("Nginx returned code %v", statusCode) | ||
| return | ||
| } | ||
|
|
||
| var prettyBuffer bytes.Buffer | ||
| indentErr := json.Indent(&prettyBuffer, body, "", " ") | ||
| if indentErr != nil { | ||
| fmt.Println(indentErr) | ||
| return | ||
| } | ||
|
|
||
| fmt.Println(string(prettyBuffer.Bytes())) | ||
| } | ||
|
|
||
| func backendsList() { | ||
| statusCode, body, requestErr := nginx.NewGetStatusRequest(backendsPath) | ||
| if requestErr != nil { | ||
| fmt.Println(requestErr) | ||
| return | ||
| } | ||
| if statusCode != 200 { | ||
| fmt.Printf("Nginx returned code %v", statusCode) | ||
| return | ||
| } | ||
|
|
||
| var f interface{} | ||
| unmarshalErr := json.Unmarshal(body, &f) | ||
| if unmarshalErr != nil { | ||
| fmt.Println(unmarshalErr) | ||
| return | ||
| } | ||
| backends := f.([]interface{}) | ||
|
|
||
| for _, backendi := range backends { | ||
| backend := backendi.(map[string]interface{}) | ||
| fmt.Println(backend["name"].(string)) | ||
| } | ||
| } | ||
|
|
||
| func backendsGet(name string) { | ||
| statusCode, body, requestErr := nginx.NewGetStatusRequest(backendsPath) | ||
| if requestErr != nil { | ||
| fmt.Println(requestErr) | ||
| return | ||
| } | ||
| if statusCode != 200 { | ||
| fmt.Printf("Nginx returned code %v", statusCode) | ||
| return | ||
| } | ||
|
|
||
| var f interface{} | ||
| unmarshalErr := json.Unmarshal(body, &f) | ||
| if unmarshalErr != nil { | ||
| fmt.Println(unmarshalErr) | ||
| return | ||
| } | ||
| backends := f.([]interface{}) | ||
|
|
||
| for _, backendi := range backends { | ||
| backend := backendi.(map[string]interface{}) | ||
| if backend["name"].(string) == name { | ||
| printed, _ := json.MarshalIndent(backend, "", " ") | ||
| fmt.Println(string(printed)) | ||
| return | ||
| } | ||
| } | ||
| fmt.Println("A backend of this name was not found.") | ||
| } | ||
|
|
||
| func general() { | ||
| statusCode, body, requestErr := nginx.NewGetStatusRequest(generalPath) | ||
| if requestErr != nil { | ||
| fmt.Println(requestErr) | ||
| return | ||
| } | ||
| if statusCode != 200 { | ||
| fmt.Printf("Nginx returned code %v", statusCode) | ||
| return | ||
| } | ||
|
|
||
| var prettyBuffer bytes.Buffer | ||
| indentErr := json.Indent(&prettyBuffer, body, "", " ") | ||
| if indentErr != nil { | ||
| fmt.Println(indentErr) | ||
| return | ||
| } | ||
|
|
||
| fmt.Println(string(prettyBuffer.Bytes())) | ||
| } | ||
|
|
||
| func readNginxConf() { | ||
| conf, err := nginx.ReadNginxConf() | ||
| if err != nil { | ||
| fmt.Println(err) | ||
| return | ||
| } | ||
|
|
||
| fmt.Println(conf) | ||
| } |
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