环境： centos7
下载安装包：
wget https://dl.grafana.com/oss/release/grafana-5.4.3-1.x86_64.rpm
安装grafana:
yum localinstall -y ./grafana-5.4.3-1.x86_64.rpm
启动grafana-server
systemctl enable --now grafana-server
安装饼状图插件，让数据显示更直观
grafana-cli plugins install grafana-piechart-panel
重启grafana
systemctl restart grafana-server
上述所有的过程结合成一条命令如下：
yum localinstall -y https://dl.grafana.com/oss/release/grafana-5.4.3-1.x86_64.rpm && systemctl enable --now grafana-server && grafana-cli plugins install grafana-piechart-panel && systemctl restart grafana-server
