转自:https://www.percona.com/doc/percona-monitoring-and-management/architecture.html
报警机制
https://www.percona.com/blog/2017/02/02/pmm-alerting-with-grafana-working-with-templated-dashboards/
https://blog.csdn.net/ashic/article/details/78830443
https://my.oschina.net/longquan/blog/1647121 -- 查看日志