influxdb 2.0安装和使用方法

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• influxdb是一个开源的时序数据库，开源版本只支持单机+高可用，商业版本才支持集群（横向扩展/分片）功能

• 安装参考 https://docs.influxdata.com/influxdb/v2.0/get-started/?t=Docker

  cd ~mkdir influxdb-datasudo docker run -d \--name influxdb \--restart always \-p 8086:8086 \--volume /home/your_name/influxdb-data:/var/lib/influxdb2 \influxdb:2.0.4

  
  

• 代码参考(golang)

package mainimport (        "context"        "fmt"        "log"        "math/rand"        "time"        influxdb2 "github.com/influxdata/influxdb-client-go/v2")func main() {        // You can generate a Token from the "Tokens Tab" in the UI        const token = "Uok6jfbNdqUWSIZyaH0aqxrSvSC1vg5WS5UyJHWciqY_FvkfOGxqHox_EbbvJQwRXQ770gUQqD1ZcXWvTjPFrA=="        const bucket = "test"        const org = "you_org"        client := influxdb2.NewClient("http://192.168.1.11:8086", token)        // always close client at the end        defer client.Close()        write(client, bucket, org)}func write(client influxdb2.Client, bucket, org string) {        // get non-blocking write client        writeAPI := client.WriteAPI(org, bucket)        now := time.Now()        times := 0        // 10个设备 (60*60*24*365)*10=315360000。约3.1亿条数据        for i := 0; i < 10; i++ {                // 过去一年                start := now.Add(-8760 * time.Hour)                for now.After(start) {                        // write line protocol                        p := influxdb2.NewPointWithMeasurement("设备信息").                                AddTag("设备id", fmt.Sprint(i)).                                AddField("压力", rand.Float32()*100).                                AddField("温度", rand.Float32()*30).SetTime(start)                        start = start.Add(1 * time.Second)                        writeAPI.WritePoint(p)                        if times == 10000 {                                log.Printf("当前设备id: %s, 本次写入 %d 条, 最后一条时间: %s", fmt.Sprint(i), times, start.Format("2006-01-02 15:04:05"))                                times = 0                                // Flush writes                                writeAPI.Flush()                        } else {                                times++                        }                }                // Flush writes                writeAPI.Flush()        }}func query(client influxdb2.Client, bucket, org string) {        query := fmt.Sprintf("from(bucket:\"%v\")|> range(start: -1h) |> filter(fn: (r) => r._measurement == \"stat\")", bucket)        // Get query client        queryAPI := client.QueryAPI(org)        // get QueryTableResult        result, err := queryAPI.Query(context.Background(), query)        if err == nil {                // Iterate over query response                for result.Next() {                        // Notice when group key has changed                        if result.TableChanged() {                                fmt.Printf("table: %s\n", result.TableMetadata().String())                        }                        // Access data                        fmt.Printf("%s value: %v\n", result.Record().Field(), result.Record().Value())                }                // check for an error                if result.Err() != nil {                        fmt.Printf("query parsing error: %s\n", result.Err().Error())                }        } else {                panic(err)        }}

• dashboard

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