Building a Prometheus Console Template

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Building a Prometheus Console Template

Prometheus collects a wide variety of metric data. However, to make use of that data in the real world, you need a way to visualize important metrics at a glance. You can do this by building dashboards or similar pages that display real-time data in a useful format. One way to build these views is to use console templates. In this lab, you will have the opportunity to build a simple console template to display some statistics about a Linux server. This will give you some hands-on experience in working with console templates.

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Lab Info

Level

Intermediate

Last updated

Apr 06, 2025

Duration

45m

Challenge

Add the Server Status Metric to the Console Template

Create and edit the console template file:

sudo vi /etc/prometheus/consoles/limedrop-web.html

Implement a display of the current "up" status of the web server:

{{template "head" .}}
{{template "prom_content_head" .}}
<h1>LimeDrop Web Server Metrics</h1>

<strong>Server Status:</strong> {{ template "prom_query_drilldown" (args "up{job='Web Server'}") }}
{{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

Challenge

Add the CPU Usage Metric to the Console Template

Edit the console template file:

sudo vi /etc/prometheus/consoles/limedrop-web.html

Implement a display for the web server's CPU usage:

{{template "head" .}}
{{template "prom_content_head" .}}
<h1>LimeDrop Web Server Metrics</h1>

<strong>Server Status:</strong> {{ template "prom_query_drilldown" (args "up{job='Web Server'}") }}
<br />
<br />
<strong>Current CPU Usage:</strong> {{ template "prom_query_drilldown" (args "sum(rate(node_cpu_seconds_total{instance='limedrop-web:9100',mode!='idle'}[5m])) * 100 / 2" "%") }}
{{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

Challenge

Add the Memory Usage Metric to the Console Template

Edit the console template file:

sudo vi /etc/prometheus/consoles/limedrop-web.html

Implement a display for the web server's memory usage:

{{template "head" .}}
{{template "prom_content_head" .}}
<h1>LimeDrop Web Server Metrics</h1>

<strong>Server Status:</strong> {{ template "prom_query_drilldown" (args "up{job='Web Server'}") }}
<br />
<br />
<strong>Current CPU Usage:</strong> {{ template "prom_query_drilldown" (args "sum(rate(node_cpu_seconds_total{instance='limedrop-web:9100',mode!='idle'}[5m])) * 100 / 2" "%") }}
<br />
<br />
<strong>Current Memory Usage:</strong> {{ template "prom_query_drilldown" (args "100 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100" "%") }}
{{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

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