golang实现网卡流量监控

在Go语言中，可以使用github.com/prometheus/client_golang/prometheus库和github.com/prometheus/client_golang/prometheus/promhttp库来实现网卡流量监控。以下是一个简单的示例代码：

首先，需要安装相关的库：

go get github.com/prometheus/client_golang/prometheus
go get github.com/prometheus/client_golang/prometheus/promhttp
go get github.com/prometheus/common/log
go get github.com/shirou/gopsutil/v3/net

然后，使用以下Go代码实现网卡流量监控：

package main
 
import (
    "log"
    "net/http"
 
    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promhttp"
    "github.com/shirou/gopsutil/v3/net"
)
 
var (
    netRecvBytes = prometheus.NewDesc(
        "net_recv_bytes_total",
        "Total number of bytes received by the network interface",
        []string{"interface"},
        nil,
    )
    netSendBytes = prometheus.NewDesc(
        "net_send_bytes_total",
        "Total number of bytes sent by the network interface",
        []string{"interface"},
        nil,
    )
)
 
type NetStatsCollector struct {
    interfaceNames map[string]bool
}
 
func (c NetStatsCollector) Describe(ch chan<- *prometheus.Desc) {
    ch <- netRecvBytes
    ch <- netSendBytes
}
 
func (c NetStatsCollector) Collect(ch chan<- prometheus.Metric) {
    stats, err := net.IOCounters(true)
    if err != nil {
        log.Printf("Error collecting network stats: %v", err)
        return
    }
 
    for _, ioStat := range stats {
        if !c.interfaceNames[ioStat.Name] {
            continue
        }
 
        ch <- prometheus.MustNewConstMetric(
            netRecvBytes,
            prometheus.CounterValue,
            float64(ioStat.BytesRecv),
            ioStat.Name,
        )
        ch <- prometheus.MustNewConstMetric(
            netSendBytes,
            prometheus.CounterValue,
            float64(ioStat.BytesSent),
            ioStat.Name,
        )
    }
}
 
func main() {
    // 可以通过参数指定监控哪些网卡，这里监控所有网卡
    collector := NetStatsCollector{
        interfaceNames: map[string]bool{},
    }
 
    // 注册collector
    prometheus.MustRegister(collector)
 
    http.Handle("/metrics", promhttp.Handler())
    log.Fatal(http.ListenAndServe(":8080", nil))
}

运行上述代码后，可以通过访问http://localhost:8080/metrics来查看网卡流量监控的metrics。

请注意，这个示例代码没有指定具体监控哪些网卡，实际使用时可能需要根据实际情况来指定。如果要监控特定网卡，可以修改NetStatsCollector结构体以过滤出特定的网卡接口。