There are different types of applications, from single large applications to microservices-based applications that cater to different needs. When it comes to the states of those applications, there are two states:
- Stateless applications can be run independently in isolation without any knowledge of past transactions.
- Stateful applications have full knowledge of the past information (state).
Most applications we use are stateful applications, and their state data may consist of user preferences, recent activity, database transactions, credentials, settings, etc.
Kubernetes provides StatefulSets when creating a stateful application in a Kubernetes cluster. Managing states within a containerized environment has become even more significant with the popularity of deploying database clusters in Kubernetes.
In this article, we will focus on how to deploy a PostgreSQL database on a Kubernetes cluster using StatefulSets.
(This article is part of our Kubernetes Guide. Use the right-hand…