- Lab
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Libraries: If you want this lab, consider one of these libraries.
- Cloud

Working with Prometheus Queries
Once you have begun collecting metric data in Prometheus, you will need to be able to work with that data in order to obtain information you can act upon. Prometheus provides a specialized query language known as Prometheus Query Language (PromQL) that allows you to write both simple and complex queries in order to retrieve and view your metric data in a useful way. In this hands-on lab, you will have the opportunity to work with Prometheus queries by writing and executing some simple queries.

Lab Info
Table of Contents
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Challenge
Get the Current Memory Usage for the LimeDrop Authentication Service
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Access the Prometheus expression browser in a web browser (replacing
<PROMETHEUS_SERVER_PUBLIC_IP>
with the public IP address of the Prometheus server):http://<PROMETHEUS_SERVER_PUBLIC_IP>:9090
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Run a query to obtain the available memory amount. Supply a label to search specifically for metrics for the
limedrop-auth:4455
instance.mem_available_total{instance="limedrop-auth:4455"}
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Log in to the Prometheus server and open the output file:
vi /home/cloud_user/auth_service_data.md
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Enter the current available memory on the
mem_available_total
line.
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Challenge
Get the available memory range data over a five-minute period three minutes ago.
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Run a query in the expression browser to obtain the data:
mem_available_total{instance="limedrop-auth:4455"}[5m] offset 3m
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Copy the output, including the timestamps.
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On the Prometheus server, open the output file:
vi /home/cloud_user/auth_service_data.md
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Paste in the data at the end of the file.
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About the author
Real skill practice before real-world application
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.
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Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.
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On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.