Merge pull request #355 from mlittlec/main

Add 'Use Affinity" tutorial

content/posts/ocne/post-28/index.md

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+---
+title: "Use Stateless Deployments"
+date: 2024-05-09
+draft: false
+summary: "Learn how to use Stateless Deployments with Oracle Cloud Native Environment."
+tags: ["ocne", "lab", "tutorial", "ocne-install"]
+showDate: true
+---
+
+## Links
+
+:crescent_moon: [Lab](https://luna.oracle.com/lab/ec9d9a9c-ad0f-49e2-8304-512046255635)
+
+:spiral_notepad: [Tutorial](https://docs.oracle.com/en/learn/ocne-deployments)
+
+## Details
+
+There are two primary approaches to managing applications on Kubernetes - StatefulSets and Deployments. StatefulSets, which require persistent storage, manage stateful workloads such as a MySQL deployment on Kubernetes. Deployments provide a way to manage stateless applications such as websites, which often do not need to maintain their internal state.
+
+> **Note:** A [DaemonSets](https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/) is a third available Kubernetes controller. Daemonsets ensure a replica of Pod will always run on all or some other cluster's Nodes and are typically used for logging agents, monitoring systems, etc.
+
+### Objectives
+
+In this tutorial, you will learn:
+
+- How to deploy and manage stateless applications
+- How to perform a rolling update and rollback
+
+### Prerequisites
+
+- Minimum of a 3-node Oracle Cloud Native Environment cluster:
+
+   - Operator node
+   - Kubernetes control plane node
+   - Kubernetes worker node
+
+- Each system should have Oracle Linux installed and configured with:
+
+   - An Oracle user account (used during the installation) with sudo access
+   - Key-based SSH, also known as password-less SSH, between the hosts
+   - Installation of Oracle Cloud Native Environment