challenge-019.md

1. Download and install Grafana OSS

• Get latest release Grafana OSS from https://grafana.com/grafana/download?platform=linux

wget https://dl.grafana.com/oss/release/grafana_9.0.5_amd64.deb
sudo dpkg -i grafana_9.0.5_amd64.deb

• Start the grafana-server

To start the service and verify that the service has started:

sudo systemctl daemon-reload
sudo systemctl start grafana-server
sudo systemctl status grafana-server

2. Download and install Prometheus and Node Exporter

• Create a user for Prometheus and Node Exporter

Note: Prometheus - is simply a database with values for metrics. Quite often, Prometheus is configured in conjunction with Grafana, which allows you to visualize metrics. Node Exporter - is necessary for collecting Linux system indicators, such as CPU load, monitoring file systems, disks, network statistics (and others).

sudo useradd --no-create-home --shell /usr/sbin/nologin prometheus
sudo useradd --no-create-home --shell /bin/false node_exporter

• Create folders

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

• Set the ownership of these directories

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

• Download the latest version of Node Exporter https://prometheus.io/download/:

  wget https://github.com/prometheus/node_exporter/releases/download/<LATEST VERSION>/node_exporter-<LATEST VERSION>linux-amd64.tar.gz
  
  tar xvf node_exporter-<LATEST VERSION>linux-amd64.tar.gz
  
  sudo cp node_exporter-<LATEST VERSION>linux-amd64/node_exporter /usr/local/bin
  sudo chown node_exporter:node_exporter /usr/local/bin/node_exporter
  

• Create the Systemd service file node_exporter

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

[Unit]
Description=Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl start node_exporter
sudo systemctl status node_exporter

• Download the latest version of Prometheus https://prometheus.io/download/:

  wget https://github.com/prometheus/prometheus/releases/download/<LATEST VERSION>/prometheus-<LATEST VERSION>linux-amd64.tar.gz
  
  tar xfz prometheus-<LATEST VERSION>linux-amd64.tar.gz
  cd prometheus-<LATEST VERSION>linux-amd64/
  
  sudo cp ./prometheus /usr/local/bin/
  sudo cp ./promtool /usr/local/bin/
  
  sudo chown prometheus:prometheus /usr/local/bin/prometheus
  sudo chown prometheus:prometheus /usr/local/bin/promtool
  
  sudo cp -r ./consoles /etc/prometheus
  sudo cp -r ./console_libraries /etc/prometheus
  
  sudo chown -R prometheus:prometheus /etc/prometheus/consoles
  sudo chown -R prometheus:prometheus /etc/prometheus/console_libraries
  

• Configure Prometheus

  sudo nano /etc/prometheus/prometheus.yml
  

  global:
    scrape_interval:     15s
    evaluation_interval: 15s
  
  rule_files:
    # - "first.rules"
    # - "second.rules"
  
  scrape_configs:
    - job_name: 'near_node'
      scrape_interval: 5s
      static_configs:
        - targets: ['localhost:9090'] # example - targets: ['99.999.99.99:3030']
  

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

• Create the Systemd service file prometheus

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

  [Unit]
  Description=Prometheus Monitoring
  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
  ExecReload=/bin/kill -HUP $MAINPID
  
  [Install]
  WantedBy=multi-user.target
  

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

3. Sign in to Grafana

To sign in to Grafana for the first time:

• Open your web browser and go to http://<IP>:3000/. The default HTTP port that Grafana listens to is 3000 unless you have configured a different port.
• On the sign-in page, enter admin for the username and password.
• Click Sign in.

If successful, you will see a prompt to change the password.

• Click OK on the prompt and change your password.

Note: We strongly recommend that you change the default administrator password. We recommend no less than 14 characters including numbers, symbols, uppercase, and lowercase letters.

• Create a new view-only user

Log in under admin and go to:

• Server Admin – Users
• Click “New user”
• Fill out he fields and Click “Create user”
• Configuration – Users. Check “Role” in the newly created user. There should be “Viewer” permissions.

Note: Create a strong password. We recommend no less than 14 characters including numbers, symbols, uppercase, and lowercase letters.

• Create Data Sources / Prometheus
• Click the configuration gear icon, then Data Source
• Select prometheus
• Set URL to http://localhost:9090
• Click Save & Test

If everything is fine, then you will see a message.

• Add Dashboard

Link to our grafana:

http://65.109.22.107:3000/d/rYdddlPWkgg/near?orgId=1&refresh=30s&from=now-24h&to=now

Login: guest

Password: 123

Software dashboard screen:

Hardware dashboard screen:

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⏪Challenge 014	Оглавление⏩