====== Сервис Grafana ======

  * [[https://geekflare.com/prometheus-grafana-setup-for-linux/|A Guide to Monitor Linux Server using Prometheus and Grafana]]
  * [[https://techexpert.tips/ru/grafana-ru/%D0%BD%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B9%D0%BA%D0%B0-%D1%83%D0%B2%D0%B5%D0%B4%D0%BE%D0%BC%D0%BB%D0%B5%D0%BD%D0%B8%D0%B9-%D0%BF%D0%BE-%D1%8D%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BD%D0%BD%D0%BE-2/|Настройка уведомлений по электронной почте Grafana]]

===== Установка =====


  * [[https://grafana.com/docs/grafana/latest/installation/debian/|Install on Debian or Ubuntu]]

==== Debian 10/Ubuntu 20 ====

<code>
# apt install -y apt-transport-https software-properties-common wget

# wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -

# echo "deb https://packages.grafana.com/oss/deb stable main" | tee -a /etc/apt/sources.list.d/grafana.list

# apt update

# apt install grafana

# systemctl enable grafana-server.service

# systemctl start grafana-server
</code>

==== Docker ====

  * [[Технология Docker]]

<code>
# id=$(docker create grafana/grafana-oss)

# docker cp $id:/etc/grafana/ - > etc_grafana.tar

# docker rm -v $id

# tar -xvf etc_grafana.tar -C /etc

# docker run -d -p 3000:3000 -v /etc/grafana:/etc/grafana --name grafana grafana/grafana-oss:7.5.4-ubuntu
  или
# docker run -d -p 3000:3000 -v /etc/grafana:/etc/grafana --name grafana grafana/grafana-oss

# docker update --restart=always grafana
</code>

  * l:admin p:admin
  * [[http://server.corpX.un:3000]]
  * [[http://192.168.X.10:3000]] 
  * [[http://10.5.N.100+X:3000]] 

===== Интеграция с Prometheus =====

<code>
Configuratin/Connections->Data Source->Prometheus 
  URL: http://localhost:9090
       http://192.168.X.10:9090  Если grafana в docker
</code>

===== Grafana dashboard =====

  * [[https://grafana.com/grafana/dashboards|Official & community built dashboards]]

==== Import dashboard ====
<code>
+ Import->Import via grafana.com
    prometheus-node-exporter: 1860
    prometheus-blackbox-exporter: 7587
  Data Source: Prometheus
</code>

==== Create dashboard ====

  * !!! Не забыть сохранить !!!

<code>
+ Create
    Name: router
      Add New Panel
      
        Panel Title: FastEthernet0/0 connection to WAN
          или
        Panel Title: Port-channel1 connection to LAN
        
        Query: A
        
          Metrics: 8*rate(ifInOctets{ifDescr="FastEthernet0/0",instance="router"}[1m])/1000000
            или
          Metrics: rate(ifInOctets{ifDescr="Port-channel1",instance="router"}[1m])/125000
          
          Legend: in Mbps
        Query: B
        
          Metrics: 8*irate(ifOutOctets{ifDescr="FastEthernet0/0",instance="router"}[1m])/1000000
            или
          Metrics: irate(ifOutOctets{ifDescr="Port-channel1",instance="router"}[1m])/125000
          
          Legend: out Mbps
</code>
===== Настройка уведомлений =====

==== Настройка модуля smtp ====
<code>
# cat /etc/grafana/grafana.ini
</code><code>
...
[smtp]
enabled = true
host = mail.isp.un:25
;host = localhost:25
;host = server.corpX.un:25   #if docker
from_address = grafana@server.corpX.un
ehlo_identity = server.corpX.un
startTLS_policy = NoStartTLS
...
</code><code>
# service grafana-server restart
  или
# docker restart grafana
</code>

==== grafana 7.X.X ====

  * Можно было задавать порог срабатывания прямо на графике!

<code>
Alerting->Notification Channels ... 
  userX/Email/userX@isp.un
  student/Email/student@corp13.un

Dashboard->Panel (name)->Edit->Alert->...->
  Evaluate every: 15s For 1m
  WHEN avg() OF query(B,1m,now) IS ABOVE 8
  Send To: userX/student

Apply->Save Dashboard!!!!
</code>