From 7115887e90ce5929d2220fdd5a196d71a784a6f8 Mon Sep 17 00:00:00 2001 From: ivamp Date: Wed, 17 Jul 2024 23:57:59 +0800 Subject: [PATCH] Initial commit --- .idea/.gitignore | 8 + .idea/go-k8s-status.iml | 9 ++ .idea/inspectionProfiles/Project_Default.xml | 12 ++ .idea/modules.xml | 8 + go.mod | 50 ++++++ go.sum | 152 +++++++++++++++++++ main.go | 144 ++++++++++++++++++ 7 files changed, 383 insertions(+) create mode 100644 .idea/.gitignore create mode 100644 .idea/go-k8s-status.iml create mode 100644 .idea/inspectionProfiles/Project_Default.xml create mode 100644 .idea/modules.xml create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..35410ca --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# 默认忽略的文件 +/shelf/ +/workspace.xml +# 基于编辑器的 HTTP 客户端请求 +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/go-k8s-status.iml b/.idea/go-k8s-status.iml new file mode 100644 index 0000000..5e764c4 --- /dev/null +++ b/.idea/go-k8s-status.iml @@ -0,0 +1,9 @@ + + + + + + + + + \ No newline at end of file diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml new file mode 100644 index 0000000..1e230da --- /dev/null +++ b/.idea/inspectionProfiles/Project_Default.xml @@ -0,0 +1,12 @@ + + + + \ No newline at end of file diff --git a/.idea/modules.xml b/.idea/modules.xml new file mode 100644 index 0000000..fc0c3ca --- /dev/null +++ b/.idea/modules.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..e81e999 --- /dev/null +++ b/go.mod @@ -0,0 +1,50 @@ +module go-k8s-status + +go 1.22.0 + +toolchain go1.22.4 + +require ( + k8s.io/apimachinery v0.30.2 + k8s.io/client-go v0.30.2 +) + +require ( + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/emicklei/go-restful/v3 v3.11.0 // indirect + github.com/go-logr/logr v1.4.1 // indirect + github.com/go-openapi/jsonpointer v0.19.6 // indirect + github.com/go-openapi/jsonreference v0.20.2 // indirect + github.com/go-openapi/swag v0.22.3 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.4 // indirect + github.com/google/gnostic-models v0.6.8 // indirect + github.com/google/gofuzz v1.2.0 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/imdario/mergo v0.3.6 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.7 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/spf13/pflag v1.0.5 // indirect + golang.org/x/net v0.23.0 // indirect + golang.org/x/oauth2 v0.10.0 // indirect + golang.org/x/sys v0.18.0 // indirect + golang.org/x/term v0.18.0 // indirect + golang.org/x/text v0.14.0 // indirect + golang.org/x/time v0.3.0 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/protobuf v1.33.0 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/api v0.30.2 // indirect + k8s.io/klog/v2 v2.120.1 // indirect + k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 // indirect + k8s.io/utils v0.0.0-20230726121419-3b25d923346b // indirect + sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect + sigs.k8s.io/yaml v1.3.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a5e2394 --- /dev/null +++ b/go.sum @@ -0,0 +1,152 @@ +github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= 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v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8= diff --git a/main.go b/main.go new file mode 100644 index 0000000..fd2d16e --- /dev/null +++ b/main.go @@ -0,0 +1,144 @@ +package main + +import ( + "context" + "encoding/json" + "flag" + "fmt" + "net/http" + "os" + "path/filepath" + "strings" + "time" + + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/rest" + "k8s.io/client-go/tools/clientcmd" +) + +type Deployment struct { + Name string `json:"name"` + Namespace string `json:"namespace"` + Replicas int32 `json:"replicas"` +} + +// Cache 缓存 +type Cache struct { + Deployments *[]Deployment `json:"deployments"` + LastUpdated time.Time `json:"lastUpdated"` +} + +var cachedData *Cache +var config *rest.Config +var err error +var clientset *kubernetes.Clientset +var namespaceList []string +var refreshing = false + +func main() { + // 获取环境变量中的命名空间列表 + namespaces := os.Getenv("NAMESPACES") + if namespaces == "" { + fmt.Println("Environment variable NAMESPACES is not set") + return + } + namespaceList = strings.Split(namespaces, ",") + + // 检查是否提供了 kubeconfig 文件路径 + home := filepath.Join("~", ".kube", "config") + kubeconfig := flag.String("kubeconfig", home, "absolute path to the kubeconfig file") + flag.Parse() + + // 判断是否在集群内部运行 + if _, err := os.Stat("/var/run/secrets/kubernetes.io/serviceaccount/token"); err == nil { + // 在集群内部运行，使用集群内部配置 + config, err = rest.InClusterConfig() + if err != nil { + fmt.Printf("Error creating in-cluster config: %v\n", err) + return + } + } else { + // 使用本地 kubeconfig 文件 + config, err = clientcmd.BuildConfigFromFlags("", *kubeconfig) + if err != nil { + fmt.Printf("Error building kubeconfig: %v\n", err) + return + } + } + + // 创建 Kubernetes 客户端 + clientset, err = kubernetes.NewForConfig(config) + if err != nil { + fmt.Printf("Error creating Kubernetes client: %v\n", err) + return + } + + startWeb() + +} + +func startWeb() { + // 创建一个新的 HTTP 服务器 + http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { + // 判断是否正在刷新 + if refreshing { + time.Sleep(1 * time.Second) + return + } + refreshing = true + defer func() { + refreshing = false + }() + + if cachedData == nil || time.Since(cachedData.LastUpdated) >= 2*time.Second { + d := getNS() + // 缓存数据 + cachedData = &Cache{ + Deployments: d, + LastUpdated: time.Now(), + } + } + + // 使用 JSON 格式返回数据 + // header + w.Header().Set("Content-Type", "application/json") + // body + err := json.NewEncoder(w).Encode(&cachedData) + if err != nil { + fmt.Printf("Error encoding JSON: %v\n", err) + return + } + }) + // 启动 HTTP 服务器 + err := http.ListenAndServe(":8080", nil) + if err != nil { + fmt.Printf("Error starting HTTP server: %v\n", err) + return + } + +} + +func getNS() *[]Deployment { + var d []Deployment + // 遍历所有命名空间 + for _, namespace := range namespaceList { + + deploymentsClient := clientset.AppsV1().Deployments(namespace) + deployments, err := deploymentsClient.List(context.TODO(), metav1.ListOptions{}) + if err != nil { + fmt.Printf("Error listing deployments in namespace %s: %v\n", namespace, err) + continue + } + + for _, deployment := range deployments.Items { + d = append(d, Deployment{ + Name: deployment.Name, + Namespace: deployment.Namespace, + Replicas: *deployment.Spec.Replicas, + }) + } + } + + return &d +}