Question

我还没有找到一些在prometheus中使用Gauge，Counter和Histogram的好例子。对此有任何帮助。我尝试使用该文档，但我无法成功创建一个有效的应用程序。

Answer 1

我找到了这个

`

package main

import (
    "net/http"

    "github.com/prometheus/client_golang/prometheus"
)

var (
cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{
    Name: "cpu_temperature_celsius",
    Help: "Current temperature of the CPU.",
 })
hdFailures = prometheus.NewCounter(prometheus.CounterOpts{
    Name: "hd_errors_total",
    Help: "Number of hard-disk errors.",
})
)

func init() {
    prometheus.MustRegister(cpuTemp)
    prometheus.MustRegister(hdFailures)
}

func main() {
    cpuTemp.Set(65.3)
    hdFailures.Inc()

    http.Handle("/metrics", prometheus.Handler())
    http.ListenAndServe(":8080", nil)
}

`

这可能对某些人有用。

Answer 2

Prometheus是一个基于拉式的系统，如果你想要基于推送的监控，你需要使用某种类型的网关。下面是一个最小的例子（实际上没有做任何有用的事情，如启动HTTP监听器，或者实际上对指标做任何事情）：

import (
        "github.com/prometheus/client_golang/prometheus"
        "net/http"
)

var responseMetric = prometheus.NewHistogram(
        prometheus.HistogramOpts{
                Name: "request_duration_milliseconds",
                Help: "Request latency distribution",
                Buckets: prometheus.ExponentialBuckets(10.0, 1.13, 40),
        })

func main() {
        prometheus.MustRegister(responseMetric)
        http.Handle("/metrics", prometheus.Handler())
        // Any other setup, then an http.ListenAndServe here
}

然后，您需要配置Prometheus来抓取二进制文件提供的/metrics页面。

Answer 3

您可以在prometheus/client_golang中找到示例。要开始使用，您只需获取软件包即可：

$ go get github.com/prometheus/client_golang/prometheus
$ go get github.com/prometheus/client_golang/prometheus/push

您可以通过设置正确的Pushgateway地址（在此示例中为http://localhost:9091/）来运行以下示例：

package main
import (
        "fmt"
        "github.com/prometheus/client_golang/prometheus"
        "github.com/prometheus/client_golang/prometheus/push"
)

func ExamplePusher_Push() {
        completionTime := prometheus.NewGauge(prometheus.GaugeOpts{
                Name: "db_backup_last_completion_timestamp_seconds",
                Help: "The timestamp of the last successful completion of a DB backup.",
        })
        completionTime.SetToCurrentTime()
        if err := push.New("http://localhost:9091/", "db_backup").
                Collector(completionTime).
                Grouping("db", "customers").
                Push(); err != nil {
                fmt.Println("Could not push completion time to Pushgateway:", err)
        }
}
func main() {
        ExamplePusher_Push()
}

运行脚本：

$ go run pushExample.go

运行代码后，您应该在网关（http://localhost:9091/）上看到指标。该界面如下所示：

如何使用client_golang将指标推送到prometheus？

3 个答案: