Systems Observability
Observability is not just about being able to ask questions to your systems. It's also about getting those answers in minutes and not hours.


AWS security groups: canned answers and exploratory questions
While using a Terraform lifecycle rule, what do you do when you get a canned response from a security group?

If it ain't broke...
A Terraform lifecycle rule in the right place can help prevent a deadlock. But the same lifecycle rule in the wrong place?

mv aws-security-group shoot-foot
How you can run into an unplanned downtime while making a seemingly harmless change of renaming an AWS security group through Terraform?
Rescuing a SPAghetti React project
Practical tips for rescuing a SPAghetti React JS project. With confidence and a shared mental model, we made the codebase reliable and easier to manage.

One year at Last9
Celebrating one year at Last9! From uncertainty to growth, it's been an amazing journey with an inspiring team and exciting challenges.


Much That We Have Gotten Wrong About SRE
An illustrated summary of Developers ➡ DevOps ➡ SRE

Infrastructure-As-Code-As-Software
Explore how Infrastructure-as-Code-as-Software combines coding practices with automation to streamline infrastructure management and enhance scalability.

SLOs That Lie
Understanding how SLOs can help improve your performance and How to set the right Service Level Objectives for your application