Deployments are the best primitive to manage and deploy our software in Kubernetes after version 1.2. They allow us to deploy pods, carry out rolling updates, and roll back pods and ReplicaSets. We can define our desired software updates declaratively using Deployments and then Deployments will do them for us progressively.
Before Deployments, ReplicationController and kubectl rolling-update were the major ways to implement rolling updates for software. These methods were much more imperative and slower. Deployment is now the main high-level object used to manage our application.
Let's take a look at how it works. In this section, we'll get a taste of how a Deployment is created, how to perform rolling updates, and rollbacks. ...
