feat: Redis热数据+K线聚合+Dashboard MySQL指标修复

backend/internal/models/metrics_kline.go

@@ -0,0 +1,38 @@
+package models
+
+import "time"
+
+// MetricsKline 指标K线聚合数据（由 Redis 热数据聚合到 MySQL）// Logan.Li
+type MetricsKline struct {
+	ID         uint      `gorm:"primarykey" json:"id"`
+	Hostname   string    `gorm:"size:255;index:idx_kline;not null" json:"hostname"`
+	Metric     string    `gorm:"size:32;index:idx_kline;not null" json:"metric"`      // cpu / mem / load1
+	Interval   string    `gorm:"size:8;index:idx_kline;not null" json:"interval"`      // 1m / 3m / 1h / 6h / 1d
+	Open       float64   `gorm:"type:decimal(10,2)" json:"open"`
+	High       float64   `gorm:"type:decimal(10,2)" json:"high"`
+	Low        float64   `gorm:"type:decimal(10,2)" json:"low"`
+	Close      float64   `gorm:"type:decimal(10,2)" json:"close"`
+	Avg        float64   `gorm:"type:decimal(10,2)" json:"avg"`
+	Count      int       `json:"count"`
+	BucketTime time.Time `gorm:"index:idx_kline;not null" json:"bucket_time"`
+	CreatedAt  time.Time `json:"created_at"`
+}
+
+func (MetricsKline) TableName() string {
+	return "metrics_klines"
+}
+
+// AggregateKlineReq 聚合请求体
+type AggregateKlineReq struct {
+	Hostname string `json:"hostname" binding:"required"`
+	Metric   string `json:"metric" binding:"required"` // cpu / mem / load1
+}
+
+// KlineQueryReq K线查询参数（Query 参数）
+type KlineQueryReq struct {
+	Hostname string `form:"hostname" binding:"required"`
+	Metric   string `form:"metric" binding:"required"`
+	Interval string `form:"interval" binding:"required"`
+	From     string `form:"from" binding:"required"` // RFC3339
+	To       string `form:"to" binding:"required"`   // RFC3339
+}