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Using the Prometheus HTTP API

Tools such as the Prometheus expression browser can provide an easy way to execute queries and interact with Prometheus data. However, Prometheus also provides an HTTP API that can allow you to integrate Prometheus with your own custom tools. In this lesson, you will perform some simple queries using the Prometheus HTTP API, allowing you to gain hands-on experience with using that API.

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Path Info

Level

Intermediate

Duration

45m

Published

Jun 12, 2020

Challenge

Get the Current Number of Threads
1. Log in to the Prometheus server.
2. Make an HTTP request to the Prometheus server to retrieve the data and save it to a file:
```
curl localhost:9090/api/v1/query?query=num_threads > /home/cloud_user/num_threads.txt
```
3. If you want, you can view the file to verify the output is there:
```
cat /home/cloud_user/num_threads.txt
```

Challenge

Get the `num_threads` Data Over the Last Five Minutes

Make an HTTP request to retrieve the data and save it to a file:

start=$(date --date '-5 min' +'%Y-%m-%dT%H:%M:%SZ')

end=$(date +'%Y-%m-%dT%H:%M:%SZ')

curl "localhost:9090/api/v1/query_range?query=num_threads&start=$start&end=$end&step=15s" > /home/cloud_user/num_threads_5_minutes.txt

View the file to verify the output is there.

cat /home/cloud_user/num_threads_5_minutes.txt

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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.