Phase 4b : Monitoring | Set up Prometheus and Grafana to monitor your application | Setup | Setup Grafana | Monitor Node Exporter

Install Grafana on Ubuntu 22.04 and Set it up to Work with Prometheus

Step 1: Install Dependencies:

First, ensure that all necessary dependencies are installed:

sudo apt-get update
sudo apt-get install -y apt-transport-https software-properties-common

Step 2: Add the GPG Key:

Add the GPG key for Grafana:

wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -

Step 3: Add Grafana Repository:

Add the repository for Grafana stable releases:

echo "deb https://packages.grafana.com/oss/deb stable main" | sudo tee -a /etc/apt/sources.list.d/grafana.list

Step 4: Update and Install Grafana:

Update the package list and install Grafana:

sudo apt-get update
sudo apt-get -y install grafana

Step 5: Enable and Start Grafana Service:

To automatically start Grafana after a reboot, enable the service:

sudo systemctl enable grafana-server

Then, start Grafana:

sudo systemctl start grafana-server

Step 6: Check Grafana Status:

Verify the status of the Grafana service to ensure it's running correctly:

sudo systemctl status grafana-server

Step 7: Access Grafana Web Interface:

Open a web browser and navigate to Grafana using your server's IP address. The default port for Grafana is 3000. For example:

http://<your-server-ip>:3000

You'll be prompted to log in to Grafana. The default username is "admin," and the default password is also "admin."

Step 8: Change the Default Password:

When you log in for the first time, Grafana will prompt you to change the default password for security reasons. Follow the prompts to set a new password.

Step 9: Add Prometheus Data Source:

To visualize metrics, you need to add a data source. Follow these steps:

• Click on the gear icon (⚙️) in the left sidebar to open the "Configuration" menu.

• Select "Data Sources."

• Click on the "Add data source" button.

• Choose "Prometheus" as the data source type.

• In the "HTTP" section:

  • Set the "URL" to http://ipaddress:9090 (assuming Prometheus is running on the same server).

  • Click the "Save & Test" button to ensure the data source is working.

Step 10: Import a Node Exporter Dashboard:

o make it easier to view metrics, you can import a pre-configured dashboard. Follow these steps:

• Click on the "+" (plus) icon in the left sidebar to open the "Create" menu.

• Select "Dashboard."

• Click on the "Import" dashboard option.

• Enter the dashboard code you want to import (e.g., code 1860).

• Click the "Load" button.

• Select the data source you added (Prometheus) from the dropdown.

• Click on the "Import" button.

You should now have a Grafana dashboard set up to visualize metrics from Prometheus. 💁🏻💁🏻💁🏻💁🏻

We also need to monitor jenkins. We can continue in next blog ( 4c ).