Table of Contents

1. Challenge

   Download and Install Prometheus

   1. Create the prometheus user and directories:

      sudo useradd -M -r -s /bin/false prometheus
      

      sudo mkdir /etc/prometheus /var/lib/prometheus
      

   2. Download and extract the pre-compiled binaries:

      wget https://github.com/prometheus/prometheus/releases/download/v2.16.0/prometheus-2.16.0.linux-amd64.tar.gz
      

      tar xzf prometheus-2.16.0.linux-amd64.tar.gz prometheus-2.16.0.linux-amd64/
      

   3. Move the files from the downloaded archive to the appropriate locations, and set ownership on these files and directories to the prometheus user:

      sudo cp prometheus-2.16.0.linux-amd64/{prometheus,promtool} /usr/local/bin/
      

      sudo chown prometheus:prometheus /usr/local/bin/{prometheus,promtool}
      

      sudo cp -r prometheus-2.16.0.linux-amd64/{consoles,console_libraries} /etc/prometheus/
      

      sudo cp prometheus-2.16.0.linux-amd64/prometheus.yml /etc/prometheus/prometheus.yml
      

      sudo chown -R prometheus:prometheus /etc/prometheus
      

      sudo chown prometheus:prometheus /var/lib/prometheus
      

   4. Run Prometheus in the foreground to make sure everything is set up correctly so far:

      prometheus --config.file=/etc/prometheus/prometheus.yml
      

2. Challenge

   Configure Prometheus as a `systemd` Service

   1. Create a systemd unit file for Prometheus:

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

   2. Define the Prometheus service in the unit file:

      [Unit]
      Description=Prometheus Time Series Collection and Processing Server
      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
      

   3. Start and enable the Prometheus service:

      sudo systemctl daemon-reload
      

      sudo systemctl start prometheus
      

      sudo systemctl enable prometheus
      

   4. Verify the Prometheus service is healthy:

      sudo systemctl status prometheus
      

   5. Make an HTTP request to Prometheus to verify it is able to respond:

      curl localhost:9090
      

   6. You can also access Prometheus in a browser using the server's public IP address: http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090.