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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.

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