Kubernetes–Schedule a pod on a Linux node–Part 1

Baca Juga

• How to Change Swappiness in Linux
• Set GRUB Bootloader Password in Linux Server
• How to Scan & Repair Linux Disk Errors
• Running Azure on your laptop–Part 2 - Azure Arc for Developers
• Running Azure on your laptop– Part 1–What is Azure Arc?
• Running Azure on your laptop–Introduction
• VisugXL - Running Azure on your laptop using Azure Arc

On our Kubernetes(AKS) cluster we have multiple node pools some with Linux nodes and some with Windows nodes:

But what if you want to schedule specific workloads on Linux or Windows nodes? The easiest way to control this is through the OS node selector. The OS node selector(“kubernetes.io/os”) is a built-in selector which indicates the OS that the node is running. We can use this selector to ensure that the pod is only deployed to nodes with the right OS.

Here is an example for Windows pods:

	apiVersion: v1
	kind: Pod
	metadata:
	name: WindowsApp
	labels:
	env: test
	spec:
	containers:
	- name: WindowsApp
	image: WindowsApp
	imagePullPolicy: IfNotPresent
	nodeSelector:
	kubernetes.io/os: Windows

view raw WindowsApp.yaml hosted with ❤ by GitHub

And here is in example for Linux pods:

	apiVersion: v1
	kind: Pod
	metadata:
	name: LinuxApp
	labels:
	env: test
	spec:
	containers:
	- name: LinuxApp
	image: LinuxApp
	imagePullPolicy: IfNotPresent
	nodeSelector:
	kubernetes.io/os: Linux

view raw LinuxApp.yaml hosted with ❤ by GitHub

Unfortunately you don’t always have direct control on the pod specification(e.g. when you are using a 3th party Helm chart). In that case we have to take a different approach. But that is for another blog post tomorrow…