Prometheus Setup Manual

WalkerNea — Mon, 01 Jun 2026 23:48:00 +0000

This manual explains the basic installation of Prometheus, including how to configure Node Exporter and AlertManager in an easy-to-understand way.

✅ 1. Install Prometheus

🔧 Prepare Users and Directories

sudo su -
yum update -y

# Create the prometheus user (login disabled)
useradd --no-create-home --shell /bin/false prometheus

# Create directories
mkdir /opt/prometheus
mkdir /var/lib/prometheus

# Change ownership to the prometheus user
chown prometheus. /opt/prometheus
chown prometheus. /var/lib/prometheus

📦 Download and Extract the Prometheus Binary

cd /opt/prometheus

# Download the Prometheus binary
curl -LO https://github.com/prometheus/prometheus/releases/download/v2.19.2/prometheus-2.19.2.linux-amd64.tar.gz

# Verify the hash
dwnl=68382959f73354b30479f9cc3e779cf80fd2e93010331652700dcc71f6b05586
diff <(sha256sum prometheus-2.19.2.linux-amd64.tar.gz | awk '{print $1}') <(echo $dwnl)

# Extract the archive
tar -zxvf prometheus-2.19.2.linux-amd64.tar.gz
cd prometheus-2.19.2.linux-amd64

# Copy binaries
cp -v prometheus /usr/local/bin/
cp -v promtool /usr/local/bin/
chown prometheus. /usr/local/bin/prometheus
chown prometheus. /usr/local/bin/promtool

✅ 2. Install Node Exporter

curl -LO https://github.com/prometheus/node_exporter/releases/download/v1.0.1/node_exporter-1.0.1.linux-amd64.tar.gz
chown ec2-user. node_exporter-1.0.1.linux-amd64.tar.gz
tar -zxvf node_exporter-1.0.1.linux-amd64.tar.gz

✅ 3. Create the Prometheus systemd Service

cat << _EOF_ > /usr/lib/systemd/system/prometheus.service
[Unit]
Description=Prometheus Service
After=network.target

[Service]
Type=simple
Restart=always
RestartSec=1
User=prometheus
Group=prometheus
ExecStart=/usr/local/bin/prometheus \
  --web.enable-lifecycle \
  --config.file=/opt/prometheus/prometheus-2.19.2.linux-amd64/prometheus.yml \
  --storage.tsdb.path=/var/lib/prometheus \
  --web.console.templates=/opt/prometheus/prometheus-2.19.2.linux-amd64/consoles \
  --web.console.libraries=/opt/prometheus/prometheus-2.19.2.linux-amd64/console_libraries \
  --storage.tsdb.retention=8d

[Install]
WantedBy=multi-user.target
_EOF_

# Start and enable the service
systemctl daemon-reload
systemctl start prometheus
systemctl enable prometheus

📌 If you want to reload Prometheus via API:

curl -X POST http://<PROMETHEUS_IP>:9090/-/reload

✅ 4. Create the Node Exporter Service

cat << _EOF_ > /usr/lib/systemd/system/node-exporter.service
[Unit]
Description=Node Exporter Service
After=network.target

[Service]
Type=simple
Restart=always
RestartSec=1
User=prometheus
Group=prometheus
ExecStart=/home/ec2-user/node_exporter-1.0.1.linux-amd64/node_exporter
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID

[Install]
WantedBy=multi-user.target
_EOF_

systemctl daemon-reload
systemctl start node-exporter
systemctl enable node-exporter

✅ 5. Access Prometheus

Open the following URL in your browser to check the metrics:

http://<PROMETHEUS_IP>:9090/metrics

✅ 6. Example prometheus.yml Configuration File

global:
  scrape_interval: 15s
  evaluation_interval: 15s

alerting:
  alertmanagers:
    - static_configs:
        - targets: ['localhost:9093']

rule_files:
  - rules.yml

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

✅ 7. Install and Configure AlertManager

curl -LO https://github.com/prometheus/alertmanager/releases/download/v0.21.0/alertmanager-0.21.0.linux-amd64.tar.gz
dwnl=9ccd863937436fd6bfe650e22521a7f2e6a727540988eef515dde208f9aef232
diff <(sha256sum alertmanager-0.21.0.linux-amd64.tar.gz | awk '{print $1}') <(echo $dwnl)
tar -zxvf alertmanager-0.21.0.linux-amd64.tar.gz

cp -v alertmanager-0.21.0.linux-amd64/alertmanager /usr/local/bin/
cp -v alertmanager-0.21.0.linux-amd64/amtool /usr/local/bin/

Create the AlertManager systemd Service

cat << _EOF_ > /usr/lib/systemd/system/alert-manager.service
[Unit]
Description=AlertManager Service for Prometheus
After=network.target

[Service]
Type=simple
Restart=always
RestartSec=1
User=prometheus
Group=prometheus
ExecStart=/usr/local/bin/alertmanager --config.file=/home/ec2-user/alertmanager-0.21.0.linux-amd64/alertmanager.yml

[Install]
WantedBy=multi-user.target
_EOF_

systemctl daemon-reload
systemctl start alert-manager
systemctl enable alert-manager

✅ 8. Example Rule File (rules.yml)

groups:
  - name: example
    rules:
      - alert: InstanceDown
        expr: up == 0
        for: 1m

🔗 Reference Links

Prometheus Official Website: https://prometheus.io
GitHub: https://github.com/prometheus
GitLab Integration: https://docs.gitlab.com/ee/administration/monitoring/prometheus/
AlertManager Templates: https://www.freedesktop.org/software/systemd/man/systemd.service.html

If you would like further improvements to this manual, Kubernetes integration, or Slack notification setup examples, feel free to ask!

Sharing knowledge is my passion.

If you'd like to support me, a coffee is always welcome ☕

https://buymeacoffee.com/walkernea

Grafana Installation

WalkerNea — Mon, 01 Jun 2026 23:46:37 +0000

This manual explains how to install Grafana and perform the initial startup configuration.

✅ 1. Grafana Installation Steps

🔄 Update the System

sudo yum update -y

📦 Download and Verify the Grafana RPM Package

curl -O https://dl.grafana.com/oss/release/grafana-7.0.6-1.x86_64.rpm

# Verify the SHA256 checksum of the downloaded file
dwnl=507af4f7c912b4563c7a2d7c96ba4232acb731cf89759d04794ace6961bf50e0
diff <(sha256sum grafana-7.0.6-1.x86_64.rpm | awk '{print $1}') <(echo $dwnl)

🧩 Install Grafana

sudo yum install grafana-7.0.6-1.x86_64.rpm

✅ 2. Start the Grafana Service and Enable Auto-Start

# Reload the systemd daemon
systemctl daemon-reload

# Check Grafana server status
systemctl status grafana-server

# Start Grafana
systemctl start grafana-server

# Enable Grafana to start automatically at boot
systemctl enable grafana-server

# Check the status again
systemctl status grafana-server

✅ 3. Access the Grafana Web Interface

curl -v http://localhost:3000

Open your browser and access:

http://localhost:3000

Default login credentials:

Username: admin
Password: admin

After logging in, you will be prompted to change the password.

🔗 Reference Links

Grafana Download: https://grafana.com/grafana/download
Prometheus Query Examples: https://prometheus.io/docs/prometheus/latest/querying/examples/

The basic Grafana installation is now complete.

Sharing knowledge is my passion.

If you'd like to support me, a coffee is always welcome ☕

https://buymeacoffee.com/walkernea

DEV Community: WalkerNea

Prometheus Setup Manual

✅ 1. Install Prometheus

🔧 Prepare Users and Directories

📦 Download and Extract the Prometheus Binary

✅ 2. Install Node Exporter

✅ 3. Create the Prometheus systemd Service

✅ 4. Create the Node Exporter Service

✅ 5. Access Prometheus

✅ 6. Example prometheus.yml Configuration File

✅ 7. Install and Configure AlertManager

Create the AlertManager systemd Service

✅ 8. Example Rule File (rules.yml)

🔗 Reference Links

Grafana Installation

✅ 1. Grafana Installation Steps

🔄 Update the System

📦 Download and Verify the Grafana RPM Package

🧩 Install Grafana

✅ 2. Start the Grafana Service and Enable Auto-Start

✅ 3. Access the Grafana Web Interface

🔗 Reference Links