O11y, shorthand for Observability - O + 11 letters + y :-) Observability is the ability to understand the internal state of a system by examining only the data it outputs. Three Pillars Metrics Quantitative measurements collected over time. Useful for dashboards, alerts, and trend analysis. Traces Traces show the journey of a request through a system. Comprised of spans, which represent operations. Useful for understanding latency, bottlenecks, and dependencies. ...

Intro Besides industry stundards using oauth2 Google or Github for authentication of users, you may need to have simple user/pass based authentication. This may be implemented in many different ways, ie using Basic Authentication on the Web Server side. If you would like to implement it using Passport on your backend, here are few point to consider: use HTTPS end to end, keep users and passwords in secure place, use crypto lib. ...

This is SRE Blog where we will share what we are learning in our daily job supporting different systems to achieve high availability, improve performance, introduce DevOps and SRE mindset.