Docker and CI/CD · Middle · Question 55 of 75

What does a rolling update do?

1Updates all instances at once during a maintenance window
✓Correct answer: Replaces instances a few at a time, keeping the service up
3Rolls back automatically after every deploy

Explanation

It's the default for Kubernetes Deployments. Readiness probes make sure new instances get traffic only when they can serve it.

Further reading

Test yourself

Take the Docker and CI/CD · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.