Versioning
When making changes to any service, a system needs to be in place to track the different changes. That way, we can understand what gets deployed when and what has changed from last week.
This information is really powerful when you're facing an incident. One of the riskiest moments in a system is when there's a new deployment, as new code can create new problems. It's not unusual that an incident is produced due to the release of a new version.
Versioning means assigning a unique code version to each service or system. It makes it easy to understand what software has been deployed and track down what has been changed from one version to another.
Version numbers are normally assigned in the source control system at specific points to precisely track the code at that particular point. The point of having a defined version is to have a precise definition of the code under that unique version number. A version number that is applicable...
