实现日志收集功能

backend/internal/storage/storage.go

@@ -228,6 +228,29 @@ func (s *Storage) WriteDiskDetailMetric(ctx context.Context, deviceID, diskDevic
 	return s.writeData(ctx, "disk_details", allTags, fields, deviceID, "disk_detail")
 }
 
+// WriteLogMetric 写入日志指标
+func (s *Storage) WriteLogMetric(ctx context.Context, deviceID string, sequence int, source string, time time.Time, message string, tags map[string]string) error {
+	// 创建标签映射，合并原有标签和新标签
+	allTags := make(map[string]string)
+	// 复制原有标签
+	for k, v := range tags {
+		allTags[k] = v
+	}
+	// 添加设备ID标签
+	allTags["device_id"] = deviceID
+	// 添加日志来源标签
+	allTags["source"] = source
+
+	// 创建字段映射
+	fields := map[string]interface{}{
+		"sequence": sequence,
+		"message":  message,
+	}
+
+	// 使用新的writeData方法
+	return s.writeData(ctx, "logs", allTags, fields, deviceID, "log")
+}
+
 // QueryMetrics 查询监控指标
 func (s *Storage) QueryMetrics(ctx context.Context, deviceID, metricType, startTime, endTime string) ([]MetricPoint, error) {
 	queryAPI := s.client.QueryAPI(s.org)
@@ -526,6 +549,67 @@ func (s *Storage) QueryProcessMetrics(ctx context.Context, deviceID string, star
 	return processes, nil
 }
 
+// QueryLogMetrics 查询日志指标
+func (s *Storage) QueryLogMetrics(ctx context.Context, deviceID string, startTime, endTime string) ([]map[string]interface{}, error) {
+	queryAPI := s.client.QueryAPI(s.org)
+
+	// 构建查询语句
+	query := `from(bucket: "` + s.bucket + `")
+	|> range(start: ` + startTime + `, stop: ` + endTime + `)
+	|> filter(fn: (r) => r["_measurement"] == "logs")`
+
+	// 如果指定了设备ID，添加设备ID过滤
+	if deviceID != "" {
+		query += `
+	|> filter(fn: (r) => r["device_id"] == "` + deviceID + `")`
+	}
+
+	// 按时间倒序排列，获取最新的日志
+	query += `
+	|> sort(columns: ["_time"], desc: true)
+	|> limit(n: 100)` // 限制返回100条最新日志
+
+	// 执行查询
+	queryResult, err := queryAPI.Query(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	defer queryResult.Close()
+
+	// 存储日志数据
+	logs := make([]map[string]interface{}, 0)
+
+	// 处理查询结果
+	for queryResult.Next() {
+		if queryResult.TableChanged() {
+			// 表结构变化，跳过
+			continue
+		}
+
+		// 获取记录
+		record := queryResult.Record()
+
+		// 构建日志数据
+		logData := map[string]interface{}{
+			"time":    record.Time(),
+			"device_id": record.ValueByKey("device_id"),
+			"source":  record.ValueByKey("source"),
+			"sequence": record.ValueByKey("sequence"),
+			"message": record.ValueByKey("message"),
+			"agent_name": record.ValueByKey("agent_name"),
+		}
+
+		// 添加到日志列表
+		logs = append(logs, logData)
+	}
+
+	if queryResult.Err() != nil {
+		return nil, queryResult.Err()
+	}
+
+	return logs, nil
+}
+
 // QueryDiskDetails 查询磁盘详细信息
 func (s *Storage) QueryDiskDetails(ctx context.Context, deviceID string, startTime, endTime string) ([]map[string]interface{}, error) {
 	queryAPI := s.client.QueryAPI(s.org)