Using the Graph Library in a Prometheus Console Template

45 minutes
  • 2 Learning Objectives

About this Hands-on Lab

Console templates provide a way to display real-time metric data in a useful format without the need for any external tools outside of Prometheus. With the console template graph library, you can even display graphs in order to visualize your data. In this lab, you will have the opportunity to implement some basic graphs within a console template. This will provide you with hands-on experience building graphs into your console templates.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Build a Console Template with a Graph Displaying CPU Usage
  1. Create and edit the console template file:

    sudo vi /etc/prometheus/consoles/limedrop-web.html
  2. Implement a graph displaying CPU usage:

    {{template "head" .}}
    {{template "prom_content_head" .}}
    <h1>LimeDrop Web Server Metrics</h1>
    
    <h3>CPU Usage</h3>
    <div id="cpuGraph"></div>
    <script>
    new PromConsole.Graph({
      node: document.querySelector("#cpuGraph"),
      expr: "sum(rate(node_cpu_seconds_total{instance='limedrop-web:9100',mode!='idle'}[5m])) * 100 / 2"
    })
    </script>
    {{template "prom_content_tail" .}}
    {{template "tail"}}
  3. View the console in a browser to verify it is working:

    http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090/consoles/limedrop-web.html
Build a Console Template with a Graph Displaying Memory Usage
  1. Edit the console template file:

    sudo vi /etc/prometheus/consoles/limedrop-web.html
  2. Implement a graph displaying memory usage:

    {{template "head" .}}
    {{template "prom_content_head" .}}
    <h1>LimeDrop Web Server Metrics</h1>
    
    <h3>CPU Usage</h3>
    <div id="cpuGraph"></div>
    <script>
    new PromConsole.Graph({
      node: document.querySelector("#cpuGraph"),
      expr: "sum(rate(node_cpu_seconds_total{instance='limedrop-web:9100',mode!='idle'}[5m])) * 100 / 2"
    })
    </script>
    
    <h3>Memory Usage</h3>
    <div id="memGraph"></div>
    <script>
    new PromConsole.Graph({
      node: document.querySelector("#memGraph"),
      expr: "100 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100"
    })
    </script>
    {{template "prom_content_tail" .}}
    {{template "tail"}}
  3. View the console in a browser to verify it is working:

    http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090/consoles/limedrop-web.html

Additional Resources

Implement a console template in the file at /etc/prometheus/consoles/limedrop-web.html. Include two graphs, one for each of the following:

  • CPU usage over time. Here's a query you can use:
    sum(rate(node_cpu_seconds_total{instance='limedrop-web:9100',mode!='idle'}[5m])) * 100 / 2
  • Memory usage over time. Here's a query you can use:
    100 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100

What are Hands-on Labs

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.

Get Started
Who’s going to be learning?

How many seats do you need?

  • $499 USD per seat per year
  • Billed Annually
  • Renews in 12 months

Ready to accelerate learning?

For over 25 licenses, a member of our sales team will walk you through a custom tailored solution for your business.


$2,495.00

Checkout
Sign In
Welcome Back!

Psst…this one if you’ve been moved to ACG!