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Kubernetes Priority Class Tutorial: Create, Manage & Troubleshoot Pods

Kubernetes Priority Class Tutorial: Create, Manage & Troubleshoot Pods

Source: YouTube · KodeKloud · published May 26, 2025 · 16:42

Cloud Security
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Description

The video explains how to manage Kubernetes priority classes, including identifying default classes, configuring custom classes, and resolving pod scheduling issues through priority adjustments. 0:46

Key Takeaways:
• Default priority classes in Kubernetes are system cluster critical and system node critical 0:46
• The system node critical priority class has a value of 2,000,000 and a preemption policy of "preempt lower priority" 1:59
• A custom priority class named "high priority" with value 100,000 and "preempt lower priority" policy can be created and verified using kubectl apply 2:58
• A "low priority" class with value 1,000 is created similarly and used in a pod to demonstrate priority assignment 5:24
• A pod named "critical app" in pending state due to insufficient resources is resolved by assigning the "high priority" class, which triggers preemption of the lower-priority pod 14:15

Adjusting pod priorities allows Kubernetes to prioritize critical workloads and resolve scheduling conflicts. 16:35

Sources:

  • 0:46 Default priority classes in a Kubernetes setup
  • 1:59 System node critical class value and preemption policy
  • 2:58 Creation and verification of a high-priority class
  • 5:24 Creation of a low-priority class and pod usage
  • 14:15 Fixing pending pod via priority class assignment
  • 16:35(

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First 800 characters of the transcript

So last week we discussed priority classes. Um but today right now we're just going to go into the lab. So we'll just wait um for the lab to load. Meanwhile, I just want to say so uh if you haven't watched the new priority class video, then you can see it right here. It should be highlighted. uh the new videos that that were added and that you haven't watched should be highlighted here. So um you can you can take a look at that. All right. So in this lab we will learn about priority classes and um the first question is which of the following priority classes are part of a default Kubernetes setup. So um the command to get the existing priority classes is cube cuddle get priority classes right priority class. All right. So uh here we see two uh priority classes. So you have the um system cl…