go自己写一个exporter
时间: 2023-07-20 09:35:37 浏览: 50
好的,下面是一个简单的示例代码,可以将系统的CPU利用率作为metrics暴露出来:
```go
package main
import (
"fmt"
"net/http"
"os"
"strconv"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
var (
cpuUtilization = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "system",
Name: "cpu_utilization",
Help: "The CPU utilization of the system.",
})
)
func init() {
prometheus.MustRegister(cpuUtilization)
}
func main() {
// Setup a HTTP handler to expose the metrics.
http.Handle("/metrics", promhttp.Handler())
// Start a goroutine to periodically update the metrics.
go func() {
for {
cpuUsage, err := getCPUUsage()
if err != nil {
fmt.Fprintf(os.Stderr, "failed to get CPU usage: %v\n", err)
continue
}
cpuUtilization.Set(cpuUsage)
time.Sleep(time.Second * 5)
}
}()
// Start the HTTP server.
fmt.Println("Listening on :8080...")
http.ListenAndServe(":8080", nil)
}
func getCPUUsage() (float64, error) {
// TODO: Implement this function.
// This function should return the CPU utilization of the system as a float64 value between 0.0 and 1.0.
// The value should represent the average CPU utilization over the last 5 seconds.
// You can use any method you like to obtain this value.
// For example, you can use the `top` command to get the CPU utilization and parse its output.
// If an error occurs, return an error object.
return 0.0, nil
}
```
这个示例代码暴露了一个名为 `system_cpu_utilization` 的metric,它的值表示系统的CPU利用率。这个metric的值每隔5秒钟更新一次,可以通过访问 `http://localhost:8080/metrics` 来获取它的值。您需要实现 `getCPUUsage()` 函数来获取CPU利用率的值。