12 利用Prometheus数据执行自动发现

概述

Prometheus中的数据格式适用于低级别自动发现。

关于Zabbix如何执行Prometheus数据的查询，请参考 Prometheus检查。

配置

利用低级别自动发现规则创建一个 依赖型监控项 ，附属于采集Prometheus数据的HTTP主监控项。

Prometheus to JSON

在自动发现规则中, 找到预处理选项卡, 然后选择 Prometheus to JSON 这个预处理选项. 自动发现需要使用JSON格式的数据, Prometheus to JSON 这个选项会返回所需的JSON格式, 并附带下列属性:

• 度量名称
• 度量值
• 帮助 (如果有)
• 类型(如果有)
• 标签(如果有)
• 原始行

例如, 需要查询 wmi_logical_disk_free_bytes:

从这些Prometheus的行中执行上述查询:

# 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

会返回:

[
           {
               "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

接下来需要找到LLD宏的配置面板并做下面的映射:

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

监控项原型

可以创建这样的监控项原型:

并配置预处理选项: