Prometheus Installation

Goal:
This blog will help you with prometheus installation.

Installation Steps.

Create user without a home directory.


sudo useradd --no-create-home --shell /bin/false prometheus


Create directories to copy prometheus config and library files and give permission to user that you crated.


sudo mkdir /etc/prometheus
sudo mkdir /var/lib/prometheus
sudo chown prometheus:prometheus /etc/prometheus
sudo chown prometheus:prometheus /var/lib/prometheus


Download and unzip prometheus from github.


curl -LO https://github.com/prometheus/prometheus/releases/download/v2.3.2/prometheus-2.3.2.linux-amd64.tar.gz 

tar -xvf prometheus-2.3.2.linux-amd64.tar.gz
mv prometheus-2.3.2.linux-amd64 prometheus-files


Copy prometheus binary files to bin directory and give permission.


sudo cp prometheus-files/prometheus /usr/local/bin/
sudo cp prometheus-files/promtool /usr/local/bin/
sudo chown prometheus:prometheus /usr/local/bin/prometheus
sudo chown prometheus:prometheus /usr/local/bin/promtool


Copy prometheus config files to directory we have created and give permission.


sudo cp -r prometheus-files/consoles /etc/prometheus
sudo cp -r prometheus-files/console_libraries /etc/prometheus
sudo chown -R prometheus:prometheus /etc/prometheus/consoles
sudo chown -R prometheus:prometheus /etc/prometheus/console_libraries


Open  prometheus YAML file and change server details from where you want to scrap log that has to be monitor.

sudo vi /etc/prometheus/prometheus.yml


Copy below content in file.

global:
  scrape_interval: 10s
     
scrape_configs:
  - job_name: 'prometheus'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9090']


Give permission to above file.

sudo chown prometheus:prometheus /etc/prometheus/prometheus.yml


Create prometheus service file to start/stop/reload prometheus as daemon.


sudo vi /etc/systemd/system/prometheus.service


Copy below content and close file.

[Unit]
Description=Prometheus
Wants=network-online.target
After=network-online.target
     
[Service]
User=prometheus
Group=prometheus
Type=simple
ExecStart=/usr/local/bin/prometheus \
        --config.file /etc/prometheus/prometheus.yml \
        --storage.tsdb.path /var/lib/prometheus/ \
        --web.console.templates=/etc/prometheus/consoles \
        --web.console.libraries=/etc/prometheus/console_libraries
     
[Install]
WantedBy=multi-user.target
    


Give permission to above file.

sudo systemctl daemon-reload
sudo systemctl start prometheus
sudo systemctl status prometheus

 

Hope You are able to install, Comment below if you have any doubt I will try to help ASAP.