Prometheus 是一套开源的系统监控、报警、时间序列数据库的组合。Prometheus 基本原理是通过Http协议周期性抓取被监控组件的状态，而输出这些被监控的组件的Http接口为 Exporter。
Grafana 是一个可视化仪表盘，它拥有美观的图标和布局展示，默认支持 CloudWatch、Graphite、ES、InfluxDB、Mysql、PostgreSQL、Prometheus、OpenTSDB等作为数据源。
我们可以将 Prometheus抓取的数据，通过 Grafana 优美直观的展示出来。

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收集一些 Hadoop 相关问题。

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本文记录一下 Mac 本机安装 Hadoop 的过程，免得每次都要去搜索一堆博客才能安装成功。

本文记录一下 Mac 本机安装 Hive 的过程，免得每次都要去搜索一堆博客才能安装成功。