Grafana是一个Go语言编写的开源度量分析与可视化套件，经常被用作基础设施的时间序列数据和应用程序分析的可视化。本文主要讲述如何安装Grafana并使用Cloudera Manager datasource 插件。
首先来直观地感受下Grafana炫酷的Demo.
下载Grafana rpm包
wget https://dl.grafana.com/oss/release/grafana-7.2.0-1.x86_64.rpm
安装Grafana
[root@cdh1 data]# yum install grafana-7.2.0-1.x86_64.rpm
启动Grafana
[root@cdh1 data]# systemctl start grafana-server [root@cdh1 data]# systemctl status grafana-server ● grafana-server.service - Grafana instance Loaded: loaded (/usr/lib/systemd/system/grafana-server.service; disabled; vendor preset: disabled) Active: active (running) since Sat 2020-09-26 22:10:13 CST; 7s ago Docs: http://docs.grafana.org Main PID: 30699 (grafana-server)
访问Grafana web页面,默认端口为3000
首次登录用户为admin,密码可以随意，并且要求重置密码
安装Cloudera Manager datasource插件，并重启Grafana
[root@cdh1 data]# grafana-cli plugins install foursquare-clouderamanager-datasource installing foursquare-clouderamanager-datasource @ 0.9.2 from: https://grafana.com/api/plugins/foursquare-clouderamanager-datasource/versions/0.9.2/download into: /var/lib/grafana/plugins ✔ Installed foursquare-clouderamanager-datasource successfully Restart grafana after installing plugins . <service grafana-server restart> [root@cdh1 data]# systemctl restart grafana-server.service [root@cdh1 data]# systemctl status grafana-server.service ● grafana-server.service - Grafana instance Loaded: loaded (/usr/lib/systemd/system/grafana-server.service; disabled; vendor preset: disabled) Active: active (running) since Sat 2020-09-26 22:39:17 CST; 20s ago Docs: http://docs.grafana.org Main PID: 5652 (grafana-server)
Cloudera Manager 数据展示
1.设置默认的数据源
点击 Add data source > 选中 Cloudera Manager，填写配置如下，并点击Save&Test ，出现datasource is working,API version is xx 表示配置成功
点击back 返回查看
7.添加图表
点击左侧home返回主页，然后点击New dashboard 准备添加第一张图表，点击Add new panel
点击Add query，选择query 类型为Cloudera Manager。我们以集群磁盘IO为例，在输入栏中填入：
select total_read_bytes_rate_across_disks, total_write_bytes_rate_across_disks where category = CLUSTER
这里填写的查询语句为Cloudera tsquery,至于什么是tsquery，我们会在后面介绍
然后点击右侧的Visualization 按钮可以选择图表类型，我们选择Graph
Cloudera Manager 对于集群磁盘IO的统计是数据传输率，显示的是Mil，我们在这里调整为MBs。在Visualization >Axes >Unit ，选中Data Rate > bytes/sec ，确认后纵坐标的单位显示正常 MBs
修改标题，并保存
第一个图表完成
