Debugging & Partial Rollbacks
If a bad update makes it halfway through rollout before catching issues:
- Debug only the new pods having problems, don’t disturb all users
- Consider partially rolling back just certain troubled services, not everything
Following these practices smooths updates and lets issues be managed better when they do strike!. Proactively add safety checks on fail points instead of reacting to complaints or outages. Kubernetes empowers organizations to confidently improve apps continuously.
Rolling Updates and Rollbacks in Kubernetes: Managing Application Updates
Many websites and apps now run on clusters of computers called containers. Containers let apps run smoothly as groups work on updating and improving the software behind the apps. A system called Kubernetes helps manage and update all those containerized apps. Sometimes app updates go wrong or cause problems for users. Kubernetes has clever ways to update apps that avoid issues.
The main method is called a rolling update. This slowly switches the software behind the scenes from an old version to a new one. A few containers at a time are updated to the new software. Kubernetes checks that each small batch works fine before updating more. This means no downtime for users! Another useful capability is rollbacks. If a new software version causes glitches, Kubernetes can automatically revert to the previous stable version. There is no need for websites to crash or stay broken!