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Go语言Grafana可视化：监控面板搭建

1. Grafana概述

Grafana是开源的可视化平台，支持多种数据源，可以创建丰富的监控仪表板。

2. 数据源配置

package grafana import ( "bytes" "encoding/json" "fmt" "net/http" ) type GrafanaClient struct { url string apiKey string httpClient *http.Client } func NewGrafanaClient(url, apiKey string) *GrafanaClient { return &GrafanaClient{ url: url, apiKey: apiKey, httpClient: http.DefaultClient, } } func (c *GrafanaClient) doRequest(method, path string, body interface{}) ([]byte, error) { var reqBody []byte if body != nil { reqBody, _ = json.Marshal(body) } req, err := http.NewRequest(method, c.url+path, bytes.NewBuffer(reqBody)) if err != nil { return nil, err } req.Header.Set("Content-Type", "application/json") req.Header.Set("Authorization", "Bearer "+c.apiKey) resp, err := c.httpClient.Do(req) if err != nil { return nil, err } defer resp.Body.Close() result, err := io.ReadAll(resp.Body) if err != nil { return nil, err } return result, nil }

3. 仪表板创建

type Dashboard struct { Title string `json:"title"` Tags []string `json:"tags"` Timezone string `json:"timezone"` Panels []Panel `json:"panels"` Time TimeRange `json:"time"` Refresh string `json:"refresh"` } type Panel struct { ID int `json:"id,omitempty"` Title string `json:"title"` Type string `json:"type"` GridPos GridPos `json:"gridPos"` Targets []Target `json:"targets"` } type Target struct { Expr string `json:"expr"` RefID string `json:"refId"` } type GridPos struct { H int `json:"h"` W int `json:"w"` X int `json:"x"` Y int `json:"y"` } type TimeRange struct { From string `json:"from"` To string `json:"to"` } func (c *GrafanaClient) CreateDashboard(dashboard *Dashboard) (string, error) { payload := map[string]interface{}{ "dashboard": dashboard, "overwrite": true, } result, err := c.doRequest("POST", "/api/dashboards/db", payload) if err != nil { return "", err } var resp map[string]interface{} json.Unmarshal(result, &resp) if uid, ok := resp["uid"].(string); ok { return uid, nil } return "", nil }

3. Panel定义

func NewGraphPanel(title string, expr string) *Panel { return &Panel{ Title: title, Type: "graph", GridPos: GridPos{H: 8, W: 12, X: 0, Y: 0}, Targets: []Target{ {Expr: expr, RefID: "A"}, }, } } func NewStatPanel(title string, expr string) *Panel { return &Panel{ Title: title, Type: "stat", GridPos: GridPos{H: 4, W: 6, X: 0, Y: 0}, Targets: []Target{ {Expr: expr, RefID: "A"}, }, } } func NewGaugePanel(title string, expr string) *Panel { return &Panel{ Title: title, Type: "gauge", GridPos: GridPos{H: 8, W: 6, X: 0, Y: 0}, Targets: []Target{ {Expr: expr, RefID: "A"}, }, } }

4. 总结

Grafana提供了强大的可视化能力，通过API可以编程方式创建和管理仪表板，实现自动化监控配置。