[Solved] You wrote this PDB YAML but it fails to apply:spec: minAvailable: 2 selector: app: backendWhat is the error? | Kubernetes

Kubernetes - Production Best Practices

You wrote this PDB YAML but it fails to apply:

spec:
  minAvailable: 2
  selector:
    app: backend

What is the error?

AMissing 'matchLabels' under selector

BminAvailable must be a string

Cselector cannot be used in PDB

DminAvailable must be greater than 5

Step-by-Step Solution

Solution:

Step 1: Check selector syntax
Selector must use 'matchLabels' or 'matchExpressions' under spec.selector.
Step 2: Identify missing matchLabels
The YAML uses 'selector: app: backend' directly, which is invalid syntax.
Final Answer:
Missing 'matchLabels' under selector -> Option A
Quick Check:
Selector requires matchLabels key = C [OK]

Quick Trick: Always use matchLabels under selector in PDB [OK]

Common Mistakes:

Master "Production Best Practices" in Kubernetes

9 interactive learning modes - each teaches the same concept differently

More Kubernetes Quizzes

You wrote this PDB YAML but it fails to apply: