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Setting up and using Prometheus on Amazon Linux involves several steps, including installation, configuration, and monitoring. Below is a step-by-step guide.

1. Install Prometheus on Amazon Linux

First, update your system and install necessary dependencies.

cd Downloads
chmod 400 prometheus.pem
ssh -i "prometheus.pem" ec2-user@ec2-18-234-161-14.compute-1.amazonaws.com

sudo yum update -y
sudo yum install -y wget tar

Download and extract the latest Prometheus binary:

// Ref https://prometheus.io/download/

cd /usr/local
sudo wget https://github.com/prometheus/prometheus/releases/latest/download/prometheus-3.1.0.linux-amd64.tar.gz
sudo tar -xvzf prometheus-3.1.0.linux-amd64.tar.gz
sudo mv prometheus-3.1.0.linux-amd64 prometheus

Check if Prometheus is working:

/usr/local/prometheus/prometheus --version

2. Configure Prometheus

Create a Prometheus configuration file:

sudo nano /usr/local/prometheus/prometheus.yml

Add the following basic configuration:

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: "prometheus"
    static_configs:
      - targets: ["localhost:9090"]

Save and exit (Ctrl+X, then Y and Enter).

3. Create a Systemd Service for Prometheus

To run Prometheus as a system service, create a service file:

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

Paste the following:

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

[Service]
User=root
ExecStart=/usr/local/prometheus/prometheus --config.file=/usr/local/prometheus/prometheus.yml --storage.tsdb.path=/usr/local/prometheus/data
Restart=always

[Install]
WantedBy=multi-user.target

Save and exit.

Reload systemd and start Prometheus:

sudo systemctl daemon-reload
sudo systemctl start prometheus
sudo systemctl enable prometheus

Check the status:

sudo systemctl status prometheus

4. Access Prometheus Dashboard

Prometheus runs on port 9090 by default. Open it in your browser:

http://<your-ec2-instance-ip>:9090

If running on AWS, ensure that security groups allow inbound traffic on port 9090.

5. Install and Configure Node Exporter (Optional)

To monitor system metrics, install Node Exporter:

cd /usr/local
sudo wget https://github.com/prometheus/node_exporter/releases/latest/download/node_exporter-1.8.2.linux-amd64.tar.gz
sudo tar -xvzf node_exporter-1.8.2.linux-amd64.tar.gz
sudo mv node_exporter-1.8.2.linux-amd64 node_exporter

Run Node Exporter:

/usr/local/node_exporter/node_exporter &

Now, add Node Exporter to the Prometheus configuration:

sudo nano /usr/local/prometheus/prometheus.yml
scrape_configs:
  - job_name: "node"
    static_configs:
      - targets: ["localhost:9100"]

Restart Prometheus:

sudo systemctl daemon-reload
sudo systemctl restart prometheus

You can now see system metrics at:

http://<your-ec2-instance-ip>:9100/metrics

6. Install Grafana for Visualization (Optional)

To visualize Prometheus metrics, install Grafana:

sudo yum install -y https://dl.grafana.com/oss/release/grafana-9.0.0-1.x86_64.rpm
sudo systemctl start grafana-server
sudo systemctl enable grafana-server

Grafana runs on port 3000, so access it at:

http://<your-ec2-instance-ip>:3000

Default login:

  • Username: admin
  • Password: admin

Next Steps

  • Add Prometheus as a data source in Grafana.
  • Create dashboards to monitor CPU, memory, and disk usage.
  • Use Alertmanager for notifications.

Would you like a script to automate this setup? 🚀