node expoter installation.txt

Node expoter installation

sudo apt-get update

sudo apt-get upgrade

Go to https://prometheus.io/download/

wget the URL

sudo tar -xvf node_exporter-1.5.0.linux-amd64.tar.gz

go inside the folder :- 

cd node_exporter-1.5.0.linux-amd64/

We can also run the node expoter

./node_exporter

Now lets configure prometheus.yml file that will listen this node expoter

Login to prometheus server go to prometheus.yml file (/etc/prometheus)

make the neccessary changes basically add the new target

sudo systemctl stop prometheus

sudo systemctl start prometheus


How to run node expoter as service:- 


sudo groupadd --system prometheus

sudo useradd -s /sbin/nologin --system -g prometheus prometheus

sudo mkdir /var/lib/node

sudo mv node_exporter /var/lib/node/


sudo nano /etc/systemd/system/node.service

[Unit]
Description=Prometheus Node Exporter
Documentation=https://prometheus.io/docs/introduction/overview/
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=prometheus
Group=prometheus
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/var/lib/node/node_exporter

SyslogIdentifier=prometheus_node_exporter
Restart=always

[Install]
WantedBy=multi-user.target



lets make the owner 

sudo chown -R prometheus:prometheus /var/lib/node

sudo chown -R prometheus:prometheus /var/lib/node/*
 
sudo systemctl daemon-reload
sudo systemctl start node
sudo systemctl enable node
sudo systemctl status node