• Install on Debian or Ubuntu
• A Guide to Monitor Linux Server using Prometheus and Grafana
• Настройка уведомлений по электронной почте Grafana

# 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

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

Configuratin->Data Source->Prometheus 
  URL: http://localhost:9090

• Official & community built dashboards

+ Import->Import via grafana.com
    prometheus-node-exporter: 1860
    prometheus-blackbox-exporter: 7587
  Data Source: Prometheus

+ Create
    Name: router
      Add New Panel
        Panel Title: FastEthernet1/0 connection to LAN
        Query: A
          Metrics: 8*rate(if_in_octets{ifDescr="FastEthernet1/0",instance="router"}[1m])/1000000
          Legend: in Mbps
        Query: B
          Metrics: 8*rate(if_out_octets{ifDescr="FastEthernet1/0",instance="router"}[1m])/1000000
          Legend: out Mbps

# cat /etc/grafana/grafana.ini

...
[smtp]
enabled = true
host = mail.isp.un:25
from_address = grafana@server.corpX.un
ehlo_identity = server.corpX.un
startTLS_policy = NoStartTLS
...

# service grafana-server restart

Alerting->Notification Channels ... 
  userX/Email/userX@isp.un

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

Apply->Save Dashboard!!!!