Some applications can be scaled up to handle an increased load by adding additional replicas. Stateless web applications are a great example of this, as adding additional replicas provides the additional capacity required to handle increased requests to your application. Some other applications are also designed to operate in such a way that adding additional pods can handle increased loads; many systems that are architected around processing messages from a central queue can also handle an increased load in this way.
When we use Kubernetes deployments to deploy our pod workloads, it is simple to scale the number of replicas used by our applications up and down using the kubectl scale command. However, if we want our applications to automatically respond to changes in their workloads and scale to meet demand, then Kubernetes provides us with Horizontal...
