How to configure Prometheus server in linux

Question

Hi Guys,

I am trying to monitor metrics of my VM using Prometheus server. Can someone tell me how can I configure Prometheus server on Linux?

Answer 1

Hi@akhtar

You can follow the below given steps to configure Prometheus server on Linux:

• Download the Prometheus software from the link given below.

https://github.com/prometheus/prometheus/releases/download/v2.18.1/prometheus-2.18.1.linux-amd64.tar.gz

•  To unpack the tar.gz file use the below given command.

 $ tar -xzf  prometheus-2.18.1.linux-amd64.tar.gz

• Now start prometheus service. Go inside the prometheus-2.18.1.linux-amd64/ and run the prometheus program file.

$ ./prometheus

For WebUI, you can browse localhost:9090

Hope this is helpful.

Answer 2

Hi there ,

Setup Prometheus Configuration

All the prometheus configurations should be present in /etc/prometheus/prometheus.yml file.

Step 1: Create the prometheus.yml file.

sudo vi /etc/prometheus/prometheus.yml

Step 2: Copy the following contents to the prometheus.yml file.

global:
  scrape_interval: 10s

scrape_configs:
  - job_name: 'prometheus'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9090']

Step 3: Change the ownership of the file to prometheus user.

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

Setup Prometheus Service File

Step 1: Create a prometheus service file.

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

Step 2: Copy the following content to the file.

[Unit]
Description=Prometheus
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

Step 3: Reload the systemd service to register the prometheus service and start the prometheus service.

sudo systemctl daemon-reload
sudo systemctl start prometheus

Check the prometheus service status using the following command.

sudo systemctl status prometheus

The status should show the active state.

Access Prometheus Web UI

Now you will be able to access the prometheus UI on 9090 port of the prometheus server.

http://<prometheus-ip>:9090/graph

You should be able to see the UI.

Right now we have just configured prometheus. You need to register the target in the prometheus.yml file to get the metrics from the source systems.

Thank you,hope my answer will help you.