├── .gitignore ├── README.md ├── controllers ├── index.go ├── metrics.go ├── nodes.go └── pods.go ├── go.mod ├── go.sum ├── k8s ├── client.go ├── logs.go ├── node.go ├── pods.go ├── shell.go └── ws.go ├── main.go ├── models └── metrics.go └── routers └── router.go /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ 2 | exec.go -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # dash 2 | 3 | the kubernetes dashboard 4 | -------------------------------------------------------------------------------- /controllers/index.go: -------------------------------------------------------------------------------- 1 | package controllers 2 | 3 | import ( 4 | "net/http" 5 | 6 | "github.com/gin-gonic/gin" 7 | ) 8 | 9 | func Ping(c *gin.Context) { 10 | c.JSON(http.StatusOK, "pong") 11 | } 12 | 13 | func writeError(c *gin.Context, msg string) { 14 | c.JSON(http.StatusOK, gin.H{ 15 | "code": 1, 16 | "message": msg, 17 | }) 18 | } 19 | 20 | func writeOK(c *gin.Context, data interface{}) { 21 | ret, ok := data.(gin.H) 22 | if !ok { 23 | ret = gin.H{} 24 | ret["data"] = data 25 | } 26 | ret["code"] = 0 27 | ret["message"] = "success" 28 | c.JSON(http.StatusOK, ret) 29 | } 30 | -------------------------------------------------------------------------------- /controllers/metrics.go: -------------------------------------------------------------------------------- 1 | package controllers 2 | 3 | import ( 4 | "context" 5 | "encoding/json" 6 | "fmt" 7 | "io" 8 | "io/ioutil" 9 | "net/http" 10 | "net/url" 11 | "reflect" 12 | "strings" 13 | "sync" 14 | "time" 15 | 16 | "github.com/cnych/dash/models" 17 | "github.com/gin-gonic/gin" 18 | "k8s.io/klog/v2" 19 | ) 20 | 21 | func GetMetrics(c *gin.Context) { 22 | // POST 传递的 JSON 数据 23 | var metricsQuery models.MetricsQuery 24 | if err := c.ShouldBindJSON(&metricsQuery); err != nil { 25 | klog.V(2).ErrorS(err, "bind models.MetricsQuery to json failed", "controller", "LoadMetrics") 26 | writeOK(c, gin.H{}) 27 | return 28 | } 29 | 30 | // todo，应该从数据库中获取 Prometheus 的服务 31 | // 先判断下 Prometheus 服务是否可用（配置一个超时参数） 32 | ctx, cancel := context.WithTimeout(context.Background(), 1000*time.Millisecond) 33 | defer cancel() 34 | readyReq, err := http.NewRequest("GET", "http://192.168.31.30:32165/-/ready", nil) 35 | if err != nil { 36 | klog.V(2).ErrorS(err, "check prometheus service ready request failed", "controller", "LoadMetrics") 37 | writeOK(c, gin.H{}) 38 | return 39 | } 40 | readyResp, err := http.DefaultClient.Do(readyReq.WithContext(ctx)) 41 | if err != nil { 42 | klog.V(2).ErrorS(err, "check prometheus service ready failed", "controller", "LoadMetrics") 43 | writeOK(c, gin.H{}) 44 | return 45 | } 46 | // 如果还没有ready，则直接返回前端空数据 47 | if readyResp.StatusCode != http.StatusOK { 48 | writeOK(c, gin.H{}) 49 | return 50 | } 51 | 52 | step := 60 53 | end := time.Now().Unix() 54 | start := end - 3600 55 | 56 | // tracker 57 | tracker := models.NewPrometheusTracker() 58 | wg := sync.WaitGroup{} 59 | 60 | e := reflect.ValueOf(&metricsQuery).Elem() 61 | for i := 0; i < e.NumField(); i++ { 62 | wg.Add(1) 63 | go func(i int) { 64 | defer wg.Done() 65 | 66 | fName := e.Type().Field(i).Name 67 | fValue := e.Field(i).Interface().(*models.MetricsCategory) 68 | fTag := e.Type().Field(i).Tag 69 | if fValue == nil { 70 | return 71 | } 72 | klog.V(3).InfoS("start request prometheus data", "filed", fName, "controller", "LoadMetrics") 73 | // 请求 Prometheus 查询 74 | prometheusQueries := fValue.GenerateQuery() 75 | if prometheusQueries == nil { 76 | klog.V(2).InfoS("no promql", "field", fName, "controller", "LoadMetrics") 77 | return 78 | } 79 | promql := url.QueryEscape(prometheusQueries.GetValueByField(fName)) 80 | klog.V(2).InfoS("prometheus query ql", "field", fName, "promql", promql) 81 | // todo，从数据库中获取prometheus地址 82 | resp, err := http.Get(fmt.Sprintf("http://192.168.31.30:32165/api/v1/query_range?query=%s&start=%d&end=%d&step=%d", promql, start, end, step)) 83 | if err != nil { 84 | klog.V(2).ErrorS(err, "request metrics data failed", "controller", "LoadMetrics") 85 | return 86 | } 87 | defer func(Body io.ReadCloser) { 88 | _ = Body.Close() 89 | }(resp.Body) 90 | body, err := ioutil.ReadAll(resp.Body) 91 | if err != nil { 92 | klog.V(2).ErrorS(err, "read response body failed", "controller", "LoadMetrics") 93 | return 94 | } 95 | var data models.PrometheusQueryResp 96 | if err := json.Unmarshal(body, &data); err != nil { 97 | klog.V(2).ErrorS(err, "unmarshal response body to models.PrometheusQueryResp failed", 98 | "controller", "LoadMetrics") 99 | return 100 | } 101 | // 配置当前查询的数据结果 102 | tag := fTag.Get("json") 103 | tracker.Set(tag[:strings.Index(tag, ",omitempty")], &data) 104 | }(i) 105 | } 106 | // 等待所有查询完成 107 | wg.Wait() 108 | 109 | // 返回最后拼接的数据 110 | writeOK(c, gin.H{ 111 | "metrics": tracker.Metrics, 112 | }) 113 | } 114 | -------------------------------------------------------------------------------- /controllers/nodes.go: -------------------------------------------------------------------------------- 1 | package controllers 2 | 3 | import ( 4 | "github.com/cnych/dash/k8s" 5 | "github.com/gin-gonic/gin" 6 | "k8s.io/klog/v2" 7 | ) 8 | 9 | func GetNodeList(c *gin.Context) { 10 | nodes, err := k8s.Client.Node.List("") 11 | if err != nil { 12 | klog.V(2).ErrorS(err, "get node list failed", "controller", "GetNodeList") 13 | writeError(c, err.Error()) 14 | return 15 | } 16 | writeOK(c, gin.H{"nodes": nodes}) 17 | } 18 | -------------------------------------------------------------------------------- /controllers/pods.go: -------------------------------------------------------------------------------- 1 | package controllers 2 | 3 | import ( 4 | "net/http" 5 | "strconv" 6 | 7 | "github.com/cnych/dash/k8s" 8 | "github.com/gin-gonic/gin" 9 | corev1 "k8s.io/api/core/v1" 10 | "k8s.io/klog/v2" 11 | ) 12 | 13 | // GetKubeLogs 实时获取Pod的日志 14 | func GetKubeLogs(c *gin.Context) { 15 | // /api/v1/namespaces/kube-system/pods/traefik-7cb4cb6bf5-p779x/logs?tailLines=500×tamps=true&previous=false&container=traefik' 16 | namespace := c.Param("namespace") 17 | podName := c.Param("pod") 18 | container := c.Query("container") 19 | tailLines, _ := strconv.ParseInt(c.DefaultQuery("tailLines", "500"), 10, 64) 20 | timestamps, _ := strconv.ParseBool(c.DefaultQuery("timestamps", "true")) 21 | previous, _ := strconv.ParseBool(c.DefaultQuery("previous", "false")) 22 | 23 | klog.V(2).InfoS("get kube logs request params", "namespace", namespace, "pod", podName, 24 | "container", container, "tailLines", tailLines, "timestamps", timestamps, "previous", previous) 25 | 26 | if namespace == "" || podName == "" || container == "" { 27 | c.String(http.StatusBadRequest, "must specific namespace、pod and container query params") 28 | return 29 | } 30 | 31 | // 获取pod的日志（websocket） 32 | // 把当前的get http request -> upgrade websocket 33 | kubeLogger, err := k8s.NewKubeLogger(c.Writer, c.Request, nil) 34 | if err != nil { 35 | klog.Error(err, "upgrade websocket failed") 36 | c.String(http.StatusBadRequest, err.Error()) 37 | return 38 | } 39 | 40 | // 构造获取日志的结构体 41 | opts := corev1.PodLogOptions{ 42 | Container: container, 43 | Follow: true, 44 | TailLines: &tailLines, 45 | Timestamps: timestamps, 46 | Previous: previous, 47 | } 48 | if err := k8s.Client.Pod.LogsStream(podName, namespace, &opts, kubeLogger); err != nil { 49 | klog.Error(err, "GetLogs stream failed") 50 | _, _ = kubeLogger.Write([]byte(err.Error())) 51 | } 52 | } 53 | 54 | func HandleTerminal(c *gin.Context) { 55 | namespace := c.Param("namespace") 56 | podName := c.Param("pod") 57 | container := c.Query("container") 58 | cmd := []string{ 59 | "/bin/sh", "-c", "clear;(bash || sh)", 60 | } 61 | klog.V(2).InfoS("get kube logs request params", 62 | "namespace", namespace, "pod", podName, "container", container, "cmd", cmd) 63 | 64 | if _, err := k8s.Client.Pod.Get(podName, namespace); err != nil { 65 | klog.Error(err, "get pod failed") 66 | c.String(http.StatusBadRequest, err.Error()) 67 | return 68 | } 69 | 70 | // todo，校验下 pod 71 | kubeShell, err := k8s.NewKubeShell(c.Writer, c.Request, nil) 72 | if err != nil { 73 | klog.Error(err, "init kube shell failed") 74 | c.String(http.StatusBadRequest, err.Error()) 75 | return 76 | } 77 | defer func() { 78 | _ = kubeShell.Close() 79 | }() 80 | 81 | if err := k8s.Client.Pod.Exec(cmd, kubeShell, namespace, podName, container); err != nil { 82 | klog.Error(err, "exec pod failed") 83 | c.String(http.StatusBadRequest, err.Error()) 84 | } 85 | 86 | } 87 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/cnych/dash 2 | 3 | go 1.15 4 | 5 | require ( 6 | github.com/gin-gonic/gin v1.7.2 7 | github.com/gorilla/websocket v1.4.2 8 | github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6 9 | golang.org/x/sys v0.0.0-20210616094352-59db8d763f22 10 | k8s.io/api v0.19.11 11 | k8s.io/apimachinery v0.19.11 12 | k8s.io/client-go v0.19.11 13 | k8s.io/klog/v2 v2.8.0 14 | ) 15 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 2 | cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 3 | cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= 4 | cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= 5 | cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= 6 | cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= 7 | cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= 8 | cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw= 9 | cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= 10 | cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= 11 | cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= 12 | cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= 13 | dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= 14 | github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8= 15 | github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E= 16 | github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI= 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v0.4.0/go.mod h1:z6/tIYblkpsD+a4lm/fGIIU9mZ+XfAiaFtq7xTgseGU= 64 | github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0= 65 | github.com/go-openapi/jsonreference v0.0.0-20160704190145-13c6e3589ad9/go.mod h1:W3Z9FmVs9qj+KR4zFKmDPGiLdk1D9Rlm7cyMvf57TTg= 66 | github.com/go-openapi/spec v0.0.0-20160808142527-6aced65f8501/go.mod h1:J8+jY1nAiCcj+friV/PDoE1/3eeccG9LYBs0tYvLOWc= 67 | github.com/go-openapi/swag v0.0.0-20160704191624-1d0bd113de87/go.mod h1:DXUve3Dpr1UfpPtxFw+EFuQ41HhCWZfha5jSVRG7C7I= 68 | github.com/go-playground/assert/v2 v2.0.1 h1:MsBgLAaY856+nPRTKrp3/OZK38U/wa0CcBYNjji3q3A= 69 | github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= 70 | github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q= 71 | github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8= 72 | 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github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= 112 | github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg= 113 | github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk= 114 | github.com/googleapis/gnostic v0.4.1 h1:DLJCy1n/vrD4HPjOvYcT8aYQXpPIzoRZONaYwyycI+I= 115 | github.com/googleapis/gnostic v0.4.1/go.mod h1:LRhVm6pbyptWbWbuZ38d1eyptfvIytN3ir6b65WBswg= 116 | github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc= 117 | github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE= 118 | github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA= 119 | github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8= 120 | github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8= 121 | github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU= 122 | github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc= 123 | github.com/imdario/mergo v0.3.5 h1:JboBksRwiiAJWvIYJVo46AfV+IAIKZpfrSzVKj42R4Q= 124 | github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA= 125 | github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU= 126 | github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4= 127 | github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68= 128 | github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4= 129 | github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU= 130 | github.com/jstemmer/go-junit-report v0.9.1/go.mod 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h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= 150 | github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI= 151 | github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= 152 | github.com/munnerz/goautoneg v0.0.0-20120707110453-a547fc61f48d/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ= 153 | github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f/go.mod h1:ZdcZmHo+o7JKHSa8/e818NopupXU1YMK5fe1lsApnBw= 154 | github.com/onsi/ginkgo v0.0.0-20170829012221-11459a886d9c/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE= 155 | github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE= 156 | github.com/onsi/ginkgo v1.11.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE= 157 | github.com/onsi/gomega v0.0.0-20170829124025-dcabb60a477c/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5uiA= 158 | github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY= 159 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github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= 181 | github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= 182 | go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU= 183 | go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8= 184 | go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw= 185 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= 186 | golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 187 | golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 188 | golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 189 | golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod 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h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= 353 | k8s.io/api v0.19.11 h1:d02ByDs0X0dTLogq7GVJDueD5BwaPkJ7w6zJJsBfH50= 354 | k8s.io/api v0.19.11/go.mod h1:NDC7FqmmQkLylzifqzU+5/+gccsbvoC0m4957WSBR8c= 355 | k8s.io/apimachinery v0.19.11 h1:elcwUwz0jtMGWSCXCCdDyP014NB9oYpqh0l6PkxxUIs= 356 | k8s.io/apimachinery v0.19.11/go.mod h1:9eb44nUQSsz9QZiilFRuMj3ZbTmoWolU8S2gnXoRMjo= 357 | k8s.io/client-go v0.19.11 h1:GR2TtCyPRu7pMQfxCL2ThmuhqpCYzghmusTJS+e17+U= 358 | k8s.io/client-go v0.19.11/go.mod h1:Mp2GI2AFRcahbA+KrNivVsnEdnm5mgE6L5tTRuMZQvs= 359 | k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0= 360 | k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE= 361 | k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y= 362 | k8s.io/klog/v2 v2.8.0 h1:Q3gmuM9hKEjefWFFYF0Mat+YyFJvsUyYuwyNNJ5C9Ts= 363 | k8s.io/klog/v2 v2.8.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec= 364 | 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-------------------------------------------------------------------------------- /k8s/client.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "path/filepath" 5 | 6 | "k8s.io/client-go/kubernetes" 7 | "k8s.io/client-go/rest" 8 | "k8s.io/client-go/tools/clientcmd" 9 | "k8s.io/client-go/util/homedir" 10 | ) 11 | 12 | // kubeclient 定义包含所有需要操作的client 13 | type kubeclient struct { 14 | Pod *PodClient 15 | Node *NodeClient 16 | } 17 | 18 | var Client *kubeclient 19 | 20 | func initK8sClient() (*kubernetes.Clientset, *rest.Config, error) { 21 | var err error 22 | var config *rest.Config 23 | var clientset *kubernetes.Clientset 24 | // inCluster（Pod）、Kubeconfig（kubectl） 25 | // 通过flag传递kubeconfig参数 26 | kubeconfig := filepath.Join(homedir.HomeDir(), ".kube", "ydzs-config") 27 | // 首先使用 inCluster 模式（RBAC -> list|get node） 28 | if config, err = rest.InClusterConfig(); err != nil { 29 | // 使用 kubeconfig 模式 30 | if config, err = clientcmd.BuildConfigFromFlags("", kubeconfig); err != nil { 31 | return nil, nil, err 32 | } 33 | } 34 | 35 | // 创建clientset对象 36 | if clientset, err = kubernetes.NewForConfig(config); err != nil { 37 | return nil, nil, err 38 | } 39 | return clientset, config, nil 40 | } 41 | 42 | func NewKubeClient() error { 43 | clientset, config, err := initK8sClient() 44 | if err != nil { 45 | return err 46 | } 47 | Client = &kubeclient{ 48 | Pod: NewPodClient(clientset, config), 49 | Node: NewNodeClient(clientset), 50 | } 51 | return nil 52 | } 53 | -------------------------------------------------------------------------------- /k8s/logs.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "net/http" 5 | 6 | "github.com/gorilla/websocket" 7 | ) 8 | 9 | type KubeLogger struct { 10 | Conn *websocket.Conn 11 | } 12 | 13 | func NewKubeLogger(w http.ResponseWriter, r *http.Request, responseHeader http.Header) (*KubeLogger, error) { 14 | // 升级get请求为websocket协议 15 | conn, err := upgrader.Upgrade(w, r, responseHeader) 16 | if err != nil { 17 | return nil, err 18 | } 19 | kubeLogger := &KubeLogger{ 20 | Conn: conn, 21 | } 22 | return kubeLogger, nil 23 | } 24 | 25 | //Write(p []byte) (n int, err error) 26 | func (kl *KubeLogger) Write(data []byte) (int, error) { 27 | if err := kl.Conn.WriteMessage(websocket.TextMessage, data); err != nil { 28 | return 0, err 29 | } 30 | return len(data), nil 31 | } 32 | 33 | func (kl *KubeLogger) Close() error { 34 | return kl.Conn.Close() 35 | } 36 | -------------------------------------------------------------------------------- /k8s/node.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "context" 5 | 6 | corev1 "k8s.io/api/core/v1" 7 | metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 8 | "k8s.io/client-go/kubernetes" 9 | ) 10 | 11 | type NodeClient struct { 12 | clientset *kubernetes.Clientset 13 | } 14 | 15 | func NewNodeClient(clientset *kubernetes.Clientset) *NodeClient { 16 | return &NodeClient{ 17 | clientset: clientset, 18 | } 19 | } 20 | 21 | func (cli *NodeClient) List(labels string) ([]corev1.Node, error) { 22 | opts := metav1.ListOptions{} 23 | if labels != "" { 24 | opts.LabelSelector = labels 25 | } 26 | nodeList, err := cli.clientset.CoreV1().Nodes().List(context.Background(), opts) 27 | if err != nil { 28 | return nil, err 29 | } 30 | return nodeList.Items, nil 31 | } 32 | -------------------------------------------------------------------------------- /k8s/pods.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "bufio" 5 | "context" 6 | "io" 7 | 8 | corev1 "k8s.io/api/core/v1" 9 | metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 10 | "k8s.io/client-go/kubernetes" 11 | "k8s.io/client-go/kubernetes/scheme" 12 | restclient "k8s.io/client-go/rest" 13 | "k8s.io/client-go/tools/remotecommand" 14 | ) 15 | 16 | type TtyHandler interface { 17 | Stdin() io.Reader 18 | Stdout() io.Writer 19 | Stderr() io.Writer 20 | Tty() bool 21 | remotecommand.TerminalSizeQueue 22 | Done() 23 | } 24 | 25 | type PodClient struct { 26 | clientset *kubernetes.Clientset 27 | config *restclient.Config 28 | } 29 | 30 | func NewPodClient(clientset *kubernetes.Clientset, config *restclient.Config) *PodClient { 31 | return &PodClient{ 32 | clientset: clientset, 33 | config: config, 34 | } 35 | } 36 | 37 | func (cli *PodClient) Get(name, namespace string) (*corev1.Pod, error) { 38 | opt := metav1.GetOptions{} 39 | return cli.clientset.CoreV1().Pods(namespace).Get(context.Background(), name, opt) 40 | } 41 | 42 | func (cli *PodClient) Logs(name, namespace string, opts *corev1.PodLogOptions) *restclient.Request { 43 | return cli.clientset.CoreV1().Pods(namespace).GetLogs(name, opts) 44 | } 45 | 46 | func (cli *PodClient) LogsStream(name, namespace string, opts *corev1.PodLogOptions, writer io.Writer) error { 47 | req := cli.Logs(name, namespace, opts) 48 | stream, err := req.Stream(context.TODO()) 49 | if err != nil { 50 | return err 51 | } 52 | defer stream.Close() 53 | 54 | buf := bufio.NewReader(stream) 55 | for { // 一直从buffer中读取数据去 56 | bytes, err := buf.ReadBytes('\n') 57 | if err != nil { 58 | if err == io.EOF { 59 | _, err = writer.Write(bytes) 60 | } 61 | return err 62 | } 63 | _, err = writer.Write(bytes) 64 | if err != nil { 65 | return err 66 | } 67 | } 68 | 69 | } 70 | 71 | func (cli *PodClient) Exec(cmd []string, handler TtyHandler, namespace, pod, container string) error { 72 | defer func() { 73 | handler.Done() 74 | }() 75 | 76 | // 构造请求 77 | req := cli.clientset.CoreV1().RESTClient().Post(). 78 | Resource("pods"). 79 | Namespace(namespace). 80 | Name(pod).SubResource("exec") 81 | 82 | req.VersionedParams(&corev1.PodExecOptions{ 83 | Container: container, 84 | Command: cmd, 85 | Stdin: handler.Stdin() != nil, 86 | Stdout: handler.Stdout() != nil, 87 | Stderr: handler.Stderr() != nil, 88 | TTY: handler.Tty(), 89 | }, scheme.ParameterCodec) 90 | 91 | executor, err := remotecommand.NewSPDYExecutor(cli.config, "POST", req.URL()) 92 | if err != nil { 93 | return err 94 | } 95 | 96 | return executor.Stream(remotecommand.StreamOptions{ 97 | Stdin: handler.Stdin(), 98 | Stdout: handler.Stdout(), 99 | Stderr: handler.Stderr(), 100 | Tty: handler.Tty(), 101 | TerminalSizeQueue: handler, 102 | }) 103 | } 104 | -------------------------------------------------------------------------------- /k8s/shell.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "encoding/json" 5 | "fmt" 6 | "io" 7 | "net/http" 8 | 9 | "github.com/gorilla/websocket" 10 | "k8s.io/client-go/tools/remotecommand" 11 | ) 12 | 13 | type ShellMessage struct { 14 | Type string `json:"type"` 15 | Data string `json:"data,omitempty"` 16 | Rows uint16 `json:"rows,omitempty"` 17 | Cols uint16 `json:"cols,omitempty"` 18 | } 19 | 20 | type KubeShell struct { 21 | conn *websocket.Conn 22 | sizeChan chan remotecommand.TerminalSize 23 | stopChan chan struct{} 24 | tty bool 25 | } 26 | 27 | var EOT = "\u0004" 28 | var _ TtyHandler = &KubeShell{} 29 | 30 | func NewKubeShell(w http.ResponseWriter, r *http.Request, responseHeader http.Header) (*KubeShell, error) { 31 | // 升级get请求为websocket协议 32 | conn, err := upgrader.Upgrade(w, r, responseHeader) 33 | if err != nil { 34 | return nil, err 35 | } 36 | kubeShell := &KubeShell{ 37 | conn: conn, 38 | sizeChan: make(chan remotecommand.TerminalSize), 39 | stopChan: make(chan struct{}), 40 | tty: true, 41 | } 42 | return kubeShell, nil 43 | } 44 | 45 | func (k *KubeShell) Stdin() io.Reader { 46 | return k 47 | } 48 | 49 | func (k *KubeShell) Stdout() io.Writer { 50 | return k 51 | } 52 | 53 | func (k *KubeShell) Stderr() io.Writer { 54 | return k 55 | } 56 | 57 | func (k *KubeShell) Tty() bool { 58 | return k.tty 59 | } 60 | 61 | func (k *KubeShell) Next() *remotecommand.TerminalSize { 62 | select { 63 | case size := <-k.sizeChan: 64 | return &size 65 | case <-k.stopChan: 66 | return nil 67 | } 68 | } 69 | 70 | func (k *KubeShell) Done() { 71 | close(k.stopChan) 72 | } 73 | 74 | func (k *KubeShell) Close() error { 75 | return k.conn.Close() 76 | } 77 | 78 | func (k *KubeShell) Read(p []byte) (n int, err error) { 79 | _, message, err := k.conn.ReadMessage() 80 | if err != nil { 81 | return copy(p, EOT), err 82 | } 83 | var msg ShellMessage 84 | if err := json.Unmarshal([]byte(message), &msg); err != nil { 85 | return copy(p, EOT), err 86 | } 87 | switch msg.Type { 88 | case "read": 89 | return copy(p, msg.Data), nil 90 | case "resize": 91 | k.sizeChan <- remotecommand.TerminalSize{Width: msg.Cols, Height: msg.Rows} 92 | return 0, nil 93 | default: 94 | return copy(p, EOT), fmt.Errorf("unknown message type: %s", msg.Type) 95 | } 96 | } 97 | 98 | func (k *KubeShell) Write(p []byte) (n int, err error) { 99 | msg, err := json.Marshal(ShellMessage{ 100 | Type: "write", 101 | Data: string(p), 102 | }) 103 | if err != nil { 104 | return 0, err 105 | } 106 | if err := k.conn.WriteMessage(websocket.TextMessage, msg); err != nil { 107 | return 0, err 108 | } 109 | return len(p), nil 110 | } 111 | -------------------------------------------------------------------------------- /k8s/ws.go: -------------------------------------------------------------------------------- 1 | package k8s 2 | 3 | import ( 4 | "net/http" 5 | 6 | "github.com/gorilla/websocket" 7 | ) 8 | 9 | // 升级http请求为websocket协议 10 | var upgrader = websocket.Upgrader{ 11 | ReadBufferSize: 1024, 12 | WriteBufferSize: 1024, 13 | CheckOrigin: func(r *http.Request) bool { 14 | return true 15 | }, 16 | } 17 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "flag" 5 | 6 | "github.com/cnych/dash/k8s" 7 | "github.com/cnych/dash/routers" 8 | "github.com/gin-gonic/gin" 9 | "k8s.io/klog/v2" 10 | ) 11 | 12 | // initialize 全局的初始化入口 13 | func initialize() error { 14 | var err error 15 | //todo，初始化配置文件 16 | // 初始化kube client 17 | if err = k8s.NewKubeClient(); err != nil { 18 | return err 19 | } 20 | return nil 21 | } 22 | 23 | func main() { 24 | // todo，传递解析flag参数 25 | // 初始化 klog，也可以绑定到本地的flagset 26 | klog.InitFlags(nil) 27 | defer klog.Flush() 28 | //flag.Set("logtostderr", "false") 29 | flag.Set("alsologtostderr", "false") 30 | flag.Parse() 31 | 32 | // 全局初始化 33 | if err := initialize(); err != nil { 34 | klog.V(2).ErrorS(err, "init global failed") 35 | return 36 | } 37 | 38 | serv := gin.Default() 39 | // 注册路由 40 | routers.InitApi(serv) 41 | // 启动服务 0.0.0.0:8888 42 | if err := serv.Run(":8888"); err != nil { 43 | klog.V(2).ErrorS(err, "server run failed") 44 | } 45 | } 46 | 47 | -------------------------------------------------------------------------------- /models/metrics.go: -------------------------------------------------------------------------------- 1 | package models 2 | 3 | import ( 4 | "fmt" 5 | "reflect" 6 | "strings" 7 | "sync" 8 | ) 9 | 10 | type MetricsCategory struct { 11 | Category string `json:"category"` 12 | Nodes string `json:"nodes,omitempty"` 13 | PVC string `json:"pvc,omitempty"` 14 | Pods string `json:"pods,omitempty"` 15 | Selector string `json:"selector,omitempty"` 16 | Namespace string `json:"namespace,omitempty"` 17 | } 18 | 19 | func (mc *MetricsCategory) GenerateQuery() *PrometheusQuery { 20 | switch mc.Category { 21 | case "cluster": 22 | return &PrometheusQuery{ 23 | MemoryUsage: strings.Replace("sum(node_memory_MemTotal_bytes - (node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes)) by (kubernetes_name)", "_bytes", fmt.Sprintf("_bytes{kubernetes_node=~\"%s\"}", mc.Nodes), -1), 24 | MemoryRequests: fmt.Sprintf(`sum(kube_pod_container_resource_requests{node=~"%s", resource="memory"}) by (component)`, mc.Nodes), 25 | MemoryLimits: fmt.Sprintf(`sum(kube_pod_container_resource_limits{node=~"%s", resource="memory"}) by (component)`, mc.Nodes), 26 | MemoryCapacity: fmt.Sprintf(`sum(kube_node_status_capacity{node=~"%s", resource="memory"}) by (component)`, mc.Nodes), 27 | MemoryAllocatableCapacity: fmt.Sprintf(`sum(kube_node_status_allocatable{node=~"%s", resource="memory"}) by (component)`, mc.Nodes), 28 | CpuUsage: fmt.Sprintf(`sum(rate(node_cpu_seconds_total{kubernetes_node=~"%s", mode=~"user|system"}[1m]))`, mc.Nodes), 29 | CpuRequests: fmt.Sprintf(`sum(kube_pod_container_resource_requests{node=~"%s", resource="cpu"}) by (component)`, mc.Nodes), 30 | CpuLimits: fmt.Sprintf(`sum(kube_pod_container_resource_limits{node=~"%s", resource="cpu"}) by (component)`, mc.Nodes), 31 | CpuCapacity: fmt.Sprintf(`sum(kube_node_status_capacity{node=~"%s", resource="cpu"}) by (component)`, mc.Nodes), 32 | CpuAllocatableCapacity: fmt.Sprintf(`sum(kube_node_status_allocatable{node=~"%s", resource="cpu"}) by (component)`, mc.Nodes), 33 | PodUsage: fmt.Sprintf(`sum({__name__=~"kubelet_running_pod_count|kubelet_running_pods", instance=~"%s"})`, mc.Nodes), 34 | PodCapacity: fmt.Sprintf(`sum(kube_node_status_capacity{node=~"%s", resource="pods"}) by (component)`, mc.Nodes), 35 | PodAllocatableCapacity: fmt.Sprintf(`sum(kube_node_status_allocatable{node=~"%s", resource="pods"}) by (component)`, mc.Nodes), 36 | FsSize: fmt.Sprintf(`sum(node_filesystem_size_bytes{kubernetes_node=~"%s", mountpoint="/"}) by (kubernetes_node)`, mc.Nodes), 37 | FsUsage: fmt.Sprintf(`sum(node_filesystem_size_bytes{kubernetes_node=~"%s", mountpoint="/"} - node_filesystem_avail_bytes{kubernetes_node=~"%s", mountpoint="/"}) by (kubernetes_node)`, mc.Nodes, mc.Nodes), 38 | } 39 | case "nodes": 40 | return &PrometheusQuery{ 41 | MemoryUsage: `sum(node_memory_MemTotal_bytes - (node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes)) by (instance)`, 42 | MemoryCapacity: `sum(kube_node_status_capacity{resource="memory"}) by (node)`, 43 | CpuUsage: `sum(rate(node_cpu_seconds_total{mode=~"user|system"}[1m])) by (instance)`, 44 | CpuCapacity: `sum(kube_node_status_capacity{resource="cpu"}) by (node)`, 45 | FsSize: `sum(node_filesystem_size_bytes{mountpoint="/"}) by (instance)`, 46 | FsUsage: `sum(node_filesystem_size_bytes{mountpoint="/"} - node_filesystem_avail_bytes{mountpoint="/"}) by (instance)`, 47 | } 48 | } 49 | return nil 50 | } 51 | 52 | type MetricsQuery struct { 53 | MemoryUsage *MetricsCategory `json:"memoryUsage,omitempty"` 54 | MemoryRequests *MetricsCategory `json:"memoryRequests,omitempty"` 55 | MemoryLimits *MetricsCategory `json:"memoryLimits,omitempty"` 56 | MemoryCapacity *MetricsCategory `json:"memoryCapacity,omitempty"` 57 | MemoryAllocatableCapacity *MetricsCategory `json:"memoryAllocatableCapacity,omitempty"` 58 | CpuUsage *MetricsCategory `json:"cpuUsage,omitempty"` 59 | CpuLimits *MetricsCategory `json:"cpuLimits,omitempty"` 60 | CpuRequests *MetricsCategory `json:"cpuRequests,omitempty"` 61 | CpuCapacity *MetricsCategory `json:"cpuCapacity,omitempty"` 62 | CpuAllocatableCapacity *MetricsCategory `json:"cpuAllocatableCapacity,omitempty"` 63 | FsSize *MetricsCategory `json:"fsSize,omitempty"` 64 | FsUsage *MetricsCategory `json:"fsUsage,omitempty"` 65 | PodUsage *MetricsCategory `json:"podUsage,omitempty"` 66 | PodCapacity *MetricsCategory `json:"podCapacity,omitempty"` 67 | PodAllocatableCapacity *MetricsCategory `json:"podAllocatableCapacity,omitempty"` 68 | } 69 | 70 | type PrometheusQuery struct { 71 | CpuUsage string 72 | CpuRequests string 73 | CpuLimits string 74 | CpuCapacity string 75 | CpuAllocatableCapacity string 76 | MemoryUsage string 77 | MemoryCapacity string 78 | MemoryRequests string 79 | MemoryLimits string 80 | MemoryAllocatableCapacity string 81 | FsUsage string 82 | FsSize string 83 | NetworkReceive string 84 | NetworkTransmit string 85 | PodUsage string 86 | PodCapacity string 87 | PodAllocatableCapacity string 88 | DiskUsage string 89 | DiskCapacity string 90 | } 91 | 92 | func (pq *PrometheusQuery) GetValueByField(field string) string { 93 | e := reflect.ValueOf(pq).Elem() 94 | for i := 0; i < e.NumField(); i++ { 95 | if e.Type().Field(i).Name == field { 96 | return e.Field(i).Interface().(string) 97 | } 98 | } 99 | return "" 100 | } 101 | 102 | type PrometheusQueryResp struct { 103 | Status string `json:"status"` 104 | Data *PrometheusQueryRespData `json:"data"` 105 | } 106 | 107 | type PrometheusQueryRespData struct { 108 | ResultType string `json:"resultType"` 109 | Result []PrometheusQueryRespResult `json:"result"` 110 | } 111 | 112 | type PrometheusQueryRespResult struct { 113 | Metric interface{} `json:"metric"` 114 | Values []interface{} `json:"values"` 115 | } 116 | 117 | type PrometheusTracker struct { 118 | // 添加读写锁来保护下面的 map 119 | sync.RWMutex 120 | Metrics map[string]*PrometheusQueryResp 121 | } 122 | 123 | func NewPrometheusTracker() *PrometheusTracker { 124 | return &PrometheusTracker{Metrics: map[string]*PrometheusQueryResp{}} 125 | } 126 | 127 | func (pt *PrometheusTracker) Get(key string) (*PrometheusQueryResp, bool) { 128 | pt.RLock() 129 | defer pt.RUnlock() 130 | val, ext := pt.Metrics[key] 131 | return val, ext 132 | } 133 | 134 | func (pt *PrometheusTracker) Set(key string, val *PrometheusQueryResp) { 135 | pt.Lock() 136 | defer pt.Unlock() 137 | pt.Metrics[key] = val 138 | } 139 | -------------------------------------------------------------------------------- /routers/router.go: -------------------------------------------------------------------------------- 1 | package routers 2 | 3 | import ( 4 | "net/http" 5 | 6 | "github.com/cnych/dash/controllers" 7 | "github.com/gin-gonic/gin" 8 | ) 9 | 10 | func InitApi(eng *gin.Engine) { 11 | // gin 配置使用中间件 12 | eng.Use(CorsMiddleware) 13 | 14 | // 注册一个check health的接口 15 | eng.GET("/ping", controllers.Ping) 16 | 17 | // 接口分组 18 | api := eng.Group("/api/v1") 19 | // 获取Node列表的接口 20 | api.GET("nodes", controllers.GetNodeList) 21 | // 获取Metrics指标数据 22 | api.POST("metrics", controllers.GetMetrics) 23 | // 获取Pod(容器)日志 24 | api.GET("namespaces/:namespace/pods/:pod/logs", controllers.GetKubeLogs) 25 | // 执行Pod(容器)命令 26 | //ws://127.0.0.1:8888/api/v1/namespaces/kube-ops/pods/gitlab-f4d95db8-fj24z/shell 27 | api.GET("namespaces/:namespace/pods/:pod/shell", controllers.HandleTerminal) 28 | } 29 | 30 | // CorsMiddleware 允许跨域的一个中间件 31 | func CorsMiddleware(c *gin.Context) { 32 | method := c.Request.Method 33 | c.Header("Access-Control-Allow-Origin", "*") 34 | c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE") 35 | c.Header("Access-Control-Allow-Headers", "Access-Control-Allow-Headers, access-control-allow-origin, Origin, X-Requested-With, Content-Type, Accept, Content-Length, Accept-Encoding, Content-Range, Content-Disposition, Authorization") 36 | c.Header("Access-Control-Allow-Credentials", "true") 37 | c.Set("content-type", "application/json") 38 | if method == "OPTIONS" { 39 | c.AbortWithStatus(http.StatusNoContent) 40 | } 41 | c.Next() 42 | } 43 | --------------------------------------------------------------------------------