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
Create and edit the console template file:
sudo vi /etc/prometheus/consoles/limedrop-web.htmlImplement 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"}}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
Edit the console template file:
sudo vi /etc/prometheus/consoles/limedrop-web.htmlImplement 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"}}View the console in a browser to verify it is working:
http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090/consoles/limedrop-web.html
