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Labs

Configuring Prometheus Alertmanager

Prometheus Alertmanager provides useful functionality around processing and managing alerts triggered by your Prometheus metric data. In this lab, you will have the opportunity to gain some hands-on experience with the process of configuring Alertmanager itself. You will be able to work with a real Alertmanager instance, making configuration changes to it.

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Labs

Path Info

Level
Clock icon Intermediate
Duration
Clock icon 30m
Last updated
Clock icon Jul 06, 2025

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Table of Contents

  1. Challenge

    Set the `from` Address for Email Alerts

    1. Log in to the Prometheus server.

    2. Edit the Alertmanager configuration file:

      sudo vi /etc/alertmanager/alertmanager.yml
      
    3. Set global.smtp_from to [email protected]:

      global:
        smtp_from: [email protected]
      
      ...
      
  2. Challenge

    Add the Requested Templates Directory

    1. Edit the Alertmanager configuration file:

      sudo vi /etc/alertmanager/alertmanager.yml
      
    2. Add the requested directory as a notification template location:

      templates:
        - "/etc/alertmanager/templates/*.tmpl"
      
    3. Restart Alertmanager to load the new configuration:

      sudo systemctl restart alertmanager
      
    4. Verify your configuration is valid by ensuring Alertmanager is running. Access Alertmanager in your browser: http://<PROMETHEUS_SERVER_PUBLIC_IP>:9093

    5. Once you can see Alertmanager in your browser, click Status and look for your new configuration options in the Config section.

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What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.