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12 使用Prometheus数据发现

概述

Prometheus提供的数据格式可以低级别发现使用

查看Prometheus检查的详细数据是如何在Zabbix中实现的。

配置

低级发现规则应该作为监控项依赖创建到Prometheus数据的HTTP监控项中。

Prometheus转JSON

在发现规则中,进入Preprocessing选项卡,并选择Prometheus to JSON Preprocessing选项。发现需要JSON格式的数据,而Prometheus to JSON预处理选项将会返回正确的数据,包含以下属性:

  • metric name
  • metric value
  • help (if present)
  • type (if present)
  • labels (if present)
  • raw line

例如,查询 wmi_logical_disk_free_bytes:

从Prometheus获取数据:

# HELP wmi_logical_disk_free_bytes Free space in bytes (LogicalDisk.PercentFreeSpace)
       # TYPE wmi_logical_disk_free_bytes gauge
       wmi_logical_disk_free_bytes{volume="C:"} 3.5180249088e+11
       wmi_logical_disk_free_bytes{volume="D:"} 2.627731456e+09
       wmi_logical_disk_free_bytes{volume="HarddiskVolume4"} 4.59276288e+08

返回:

[
           {
               "name": "wmi_logical_disk_free_bytes",
               "help": "Free space in bytes (LogicalDisk.PercentFreeSpace)",
               "type": "gauge",
               "labels": {
                   "volume": "C:"
                },
               "value": "3.5180249088e+11",
               "line_raw": "wmi_logical_disk_free_bytes{volume=\"C:\"} 3.5180249088e+11"
           },
           {
               "name": "wmi_logical_disk_free_bytes",
               "help": "Free space in bytes (LogicalDisk.PercentFreeSpace)",
               "type": "gauge",
               "labels": {
                   "volume": "D:"
                },
               "value": "2.627731456e+09",
               "line_raw": "wmi_logical_disk_free_bytes{volume=\"D:\"} 2.627731456e+09"
           },
           {
               "name": "wmi_logical_disk_free_bytes",
               "help": "Free space in bytes (LogicalDisk.PercentFreeSpace)",
               "type": "gauge",
               "labels": {
                   "volume": "HarddiskVolume4"
                },
               "value": "4.59276288e+08",
               "line_raw": "wmi_logical_disk_free_bytes{volume=\"HarddiskVolume4\"} 4.59276288e+08"
           }
       ]
映射LLD宏

接下来,你必须进入LLD宏标签,并创建以下映射:

{#VOLUME}=$.labels['volume']
       {#METRIC}=$['name']
       {#HELP}=$['help']
监控项原型

你可能想要这样创建一个监控项原型:

与预处理选项: