mirror of https://github.com/ethereum/go-ethereum
Péter Szilágyi
10 years ago
parent
bde2ff0343
commit
e5b820c47b
@ -0,0 +1,180 @@ |
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package main |
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|
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import ( |
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"reflect" |
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"sort" |
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"strings" |
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"time" |
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|
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"github.com/codegangsta/cli" |
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"github.com/ethereum/go-ethereum/cmd/utils" |
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"github.com/ethereum/go-ethereum/rpc" |
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"github.com/ethereum/go-ethereum/rpc/codec" |
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"github.com/ethereum/go-ethereum/rpc/comms" |
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"github.com/gizak/termui" |
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) |
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// monitor starts a terminal UI based monitoring tool for the requested metrics.
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func monitor(ctx *cli.Context) { |
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var ( |
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client comms.EthereumClient |
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args []string |
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err error |
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) |
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// Attach to an Ethereum node over IPC or RPC
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if ctx.Args().Present() { |
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// Try to interpret the first parameter as an endpoint
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client, err = comms.ClientFromEndpoint(ctx.Args().First(), codec.JSON) |
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if err == nil { |
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args = ctx.Args().Tail() |
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} |
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} |
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if !ctx.Args().Present() || err != nil { |
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// Either no args were given, or not endpoint, use defaults
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cfg := comms.IpcConfig{ |
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Endpoint: ctx.GlobalString(utils.IPCPathFlag.Name), |
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} |
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args = ctx.Args() |
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client, err = comms.NewIpcClient(cfg, codec.JSON) |
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} |
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if err != nil { |
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utils.Fatalf("Unable to attach to geth node - %v", err) |
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} |
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defer client.Close() |
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xeth := rpc.NewXeth(client) |
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// Retrieve all the available metrics and resolve the user pattens
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metrics, err := xeth.Call("debug_metrics", []interface{}{true}) |
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if err != nil { |
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utils.Fatalf("Failed to retrieve system metrics: %v", err) |
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} |
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monitored := resolveMetrics(metrics, args) |
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sort.Strings(monitored) |
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// Create the access function and check that the metric exists
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value := func(metrics map[string]interface{}, metric string) float64 { |
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parts, found := strings.Split(metric, "/"), true |
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for _, part := range parts[:len(parts)-1] { |
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metrics, found = metrics[part].(map[string]interface{}) |
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if !found { |
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utils.Fatalf("Metric not found: %s", metric) |
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} |
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} |
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if v, ok := metrics[parts[len(parts)-1]].(float64); ok { |
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return v |
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} |
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utils.Fatalf("Metric not float64: %s", metric) |
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return 0 |
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} |
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// Assemble the terminal UI
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if err := termui.Init(); err != nil { |
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utils.Fatalf("Unable to initialize terminal UI: %v", err) |
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} |
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defer termui.Close() |
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termui.UseTheme("helloworld") |
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charts := make([]*termui.LineChart, len(monitored)) |
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for i, metric := range monitored { |
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charts[i] = termui.NewLineChart() |
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charts[i].Border.Label = metric |
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charts[i].Data = make([]float64, 512) |
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charts[i].DataLabels = []string{""} |
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charts[i].Height = termui.TermHeight() / len(monitored) |
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charts[i].AxesColor = termui.ColorWhite |
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charts[i].LineColor = termui.ColorGreen |
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termui.Body.AddRows(termui.NewRow(termui.NewCol(12, 0, charts[i]))) |
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} |
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termui.Body.Align() |
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termui.Render(termui.Body) |
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refresh := time.Tick(time.Second) |
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for { |
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select { |
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case event := <-termui.EventCh(): |
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if event.Type == termui.EventKey && event.Ch == 'q' { |
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return |
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} |
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if event.Type == termui.EventResize { |
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termui.Body.Width = termui.TermWidth() |
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for _, chart := range charts { |
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chart.Height = termui.TermHeight() / len(monitored) |
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} |
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termui.Body.Align() |
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termui.Render(termui.Body) |
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} |
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case <-refresh: |
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metrics, err := xeth.Call("debug_metrics", []interface{}{true}) |
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if err != nil { |
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utils.Fatalf("Failed to retrieve system metrics: %v", err) |
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} |
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for i, metric := range monitored { |
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charts[i].Data = append([]float64{value(metrics, metric)}, charts[i].Data[:len(charts[i].Data)-1]...) |
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} |
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termui.Render(termui.Body) |
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} |
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} |
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} |
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// resolveMetrics takes a list of input metric patterns, and resolves each to one
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// or more canonical metric names.
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func resolveMetrics(metrics map[string]interface{}, patterns []string) []string { |
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res := []string{} |
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for _, pattern := range patterns { |
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res = append(res, resolveMetric(metrics, pattern, "")...) |
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} |
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return res |
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} |
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// resolveMetrics takes a single of input metric pattern, and resolves it to one
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// or more canonical metric names.
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func resolveMetric(metrics map[string]interface{}, pattern string, path string) []string { |
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var ok bool |
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// Build up the canonical metric path
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parts := strings.Split(pattern, "/") |
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for len(parts) > 1 { |
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if metrics, ok = metrics[parts[0]].(map[string]interface{}); !ok { |
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utils.Fatalf("Failed to retrieve system metrics: %s", path+parts[0]) |
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} |
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path += parts[0] + "/" |
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parts = parts[1:] |
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} |
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// Depending what the last link is, return or expand
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switch metric := metrics[parts[0]].(type) { |
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case float64: |
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// Final metric value found, return as singleton
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return []string{path + parts[0]} |
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case map[string]interface{}: |
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return expandMetrics(metric, path+parts[0]+"/") |
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default: |
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utils.Fatalf("Metric pattern resolved to unexpected type: %v", reflect.TypeOf(metric)) |
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return nil |
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} |
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} |
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// expandMetrics expands the entire tree of metrics into a flat list of paths.
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func expandMetrics(metrics map[string]interface{}, path string) []string { |
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// Iterate over all fields and expand individually
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list := []string{} |
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for name, metric := range metrics { |
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switch metric := metric.(type) { |
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case float64: |
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// Final metric value found, append to list
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list = append(list, path+name) |
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case map[string]interface{}: |
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// Tree of metrics found, expand recursively
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list = append(list, expandMetrics(metric, path+name+"/")...) |
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default: |
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utils.Fatalf("Metric pattern %s resolved to unexpected type: %v", path+name, reflect.TypeOf(metric)) |
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return nil |
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} |
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} |
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return list |
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} |
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@ -0,0 +1,52 @@ |
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package rpc |
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import ( |
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"encoding/json" |
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"fmt" |
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"reflect" |
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"sync/atomic" |
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"github.com/ethereum/go-ethereum/rpc/comms" |
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"github.com/ethereum/go-ethereum/rpc/shared" |
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) |
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// Xeth is a native API interface to a remote node.
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type Xeth struct { |
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client comms.EthereumClient |
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reqId uint32 |
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} |
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// NewXeth constructs a new native API interface to a remote node.
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func NewXeth(client comms.EthereumClient) *Xeth { |
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return &Xeth{ |
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client: client, |
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} |
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} |
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// Call invokes a method with the given parameters are the remote node.
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func (self *Xeth) Call(method string, params []interface{}) (map[string]interface{}, error) { |
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// Assemble the json RPC request
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data, err := json.Marshal(params) |
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if err != nil { |
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return nil, err |
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} |
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req := &shared.Request{ |
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Id: atomic.AddUint32(&self.reqId, 1), |
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Jsonrpc: "2.0", |
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Method: method, |
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Params: data, |
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} |
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// Send the request over and process the response
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if err := self.client.Send(req); err != nil { |
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return nil, err |
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} |
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res, err := self.client.Recv() |
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if err != nil { |
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return nil, err |
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} |
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value, ok := res.(map[string]interface{}) |
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if !ok { |
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return nil, fmt.Errorf("Invalid response type: have %v, want %v", reflect.TypeOf(res), reflect.TypeOf(make(map[string]interface{}))) |
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} |
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return value, nil |
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} |
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