Merge pull request #335 from mlittlec/main

Add Use Labels and Selectors lab to Cloud Native track

content/posts/ocne/post-25/index.md

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+---
+title: "Use Labels and Node Selectors"
+date: 2024-03-26
+draft: false
+summary: "This tutorial shows how to use Labels and Node Selectors with Oracle Cloud Native Environment."
+tags: ["ocne", "lab", "tutorial", "ocne-k8s"]
+showDate: true
+---
+
+## Links
+
+:crescent_moon: [Lab](https://luna.oracle.com/lab/81c57622-f1dc-4a06-a714-96aae8729b38)
+
+:spiral_notepad: [Tutorial](https://docs.oracle.com/en/learn/ocne-labels)
+
+## Details
+
+The ability to influence how Kubernetes schedules Pods to provide the best performance, reduce running costs and more easily simplify cluster management is a vital skill for an administrator to master. Many Kubernetes clusters have nodes with varying capabilities, for example:
+
+- GPU card (for machine learning applications)
+- SSD disk (for applications requiring fast data access)
+- High-end CPU (for CPU-intensive tasks)
+
+Administrators use several ways to influence how the Kubernetes scheduler deploys applications to specific nodes. This tutorial covers using labels and nodeSelector (the simplest way to assign pods to nodes).
+
+### Objectives
+
+You will learn:
+
+- How to review and set labels on Nodes.
+- How to define and use a nodeSelector to influence an application deployment.
+
+### Prerequisites
+
+- 4 Oracle Linux systems to use as:
+  - Operator node (ocne-operator-01)
+  - Kubernetes control plane node (ocne-control-01)
+  - Kubernetes worker nodes (ocne-worker-01 & ocne-worker-02)
+
+- Each system should have the latest Oracle Linux 8 (x86_64) installed
+
+- This environment is pre-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