如何使用go语言进行监控与告警系统的开发与实现

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
)

func main() {
    url := "http://localhost/api/cpu-usage"

    resp, err := http.Get(url)
    if err != nil {
        fmt.Println("HTTP request error:", err)
        return
    }
    defer resp.Body.Close()

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("Read response body error:", err)
        return
    }

    cpuUsage := string(body)
    fmt.Println("CPU usage:", cpuUsage)
}

package main

import (
    "fmt"
    "time"

    influxdb2 "github.com/influxdata/influxdb-client-go/v2"
)

func main() {
    url := "http://localhost:8086"
    token := "YOUR_TOKEN"
    org := "YOUR_ORG"
    bucket := "YOUR_BUCKET"

    client := influxdb2.NewClient(url, token)
    writeAPI := client.WriteAPI(org, bucket)

    cpuUsage := 80.5 // 假设获取到的CPU使用率为80.5

    p := influxdb2.NewPoint("cpu_usage",
        map[string]string{},
        map[string]interface{}{"value": cpuUsage},
        time.Now())
    writeAPI.WritePoint(p)
    writeAPI.Flush()

    defer client.Close()

    fmt.Println("Write CPU usage to InfluxDB success.")
}

package main

import (
    "fmt"
    "time"
)

func main() {
    cpuUsages := []float64{80.5, 75.6, 78.9, 82.3, 77.8} // 假设是最近5分钟的采集数据

    var sum float64
    for _, usage := range cpuUsages {
        sum += usage
    }

    avg := sum / float64(len(cpuUsages))
    fmt.Printf("Average CPU usage in the past 5 minutes: %.2f
", avg)
}

package main

import (
    "fmt"

    "github.com/sendgrid/sendgrid-go"
    "github.com/sendgrid/sendgrid-go/helpers/mail"
)

func main() {
    from := mail.NewEmail("Sender", "sender@example.com")
    to := mail.NewEmail("Recipient", "recipient@example.com")
    subject := "CPU usage exceeds threshold"
    plainTextContent := "The CPU usage exceeds the threshold value."
    htmlContent := "<strong>The CPU usage exceeds the threshold value.</strong>"
    message := mail.NewSingleEmail(from, subject, to, plainTextContent, htmlContent)

    client := sendgrid.NewSendClient("YOUR_SENDGRID_API_KEY")
    response, err := client.Send(message)
    if err != nil {
        fmt.Println("Send email error:", err)
        return
    }

    fmt.Println("Send email success:", response.StatusCode)
}