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Kyle Hodgetts
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Nov 1, 2022
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "log" | ||
| "net/http" | ||
| "os" | ||
| "path" | ||
| "time" | ||
|
|
||
| "github.com/gorilla/websocket" | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| ) | ||
|
|
||
| var upgrader = websocket.Upgrader{ | ||
| ReadBufferSize: 1024, | ||
| WriteBufferSize: 1024, | ||
| } | ||
|
|
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| func wsEndpoint(w http.ResponseWriter, r *http.Request) { | ||
| upgrader.CheckOrigin = func(r *http.Request) bool { return true } | ||
| ws, err := upgrader.Upgrade(w, r, nil) | ||
| if err != nil { | ||
| log.Println(err) | ||
| } | ||
|
|
||
| k8sConfig, err := getKubeConfig() | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| clientset, err := kubernetes.NewForConfig(k8sConfig) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| log.Println("Client Connected") | ||
| for { | ||
| err = ws.WriteMessage(websocket.TextMessage, []byte("Hi Client!")) | ||
| if err != nil { | ||
| log.Println(err) | ||
| } | ||
|
|
||
| time.Sleep(time.Second * 1) | ||
| } | ||
| } | ||
|
|
||
| func main() { | ||
| http.HandleFunc("/logs", wsEndpoint) | ||
| log.Fatal(http.ListenAndServe(":8080", nil)) | ||
| } | ||
|
|
||
| func getKubeConfig() (*rest.Config, error) { | ||
| var err error | ||
| var config *rest.Config | ||
| k8sConfigExists := false | ||
| homeDir, _ := os.UserHomeDir() | ||
| cubeConfigPath := path.Join(homeDir, ".kube/config") | ||
|
|
||
| if _, err := os.Stat(cubeConfigPath); err == nil { | ||
| k8sConfigExists = true | ||
| } | ||
|
|
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| if cfg, exists := os.LookupEnv("KUBECONFIG"); exists { | ||
| config, err = clientcmd.BuildConfigFromFlags("", cfg) | ||
| } else if k8sConfigExists { | ||
| config, err = clientcmd.BuildConfigFromFlags("", cubeConfigPath) | ||
| } else { | ||
| config, err = rest.InClusterConfig() | ||
| } | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // default query per second is set to 5 | ||
| config.QPS = 40.0 | ||
| // default burst is set to 10 | ||
| config.Burst = 400.0 | ||
|
|
||
| return config, err | ||
| } |
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