Unused CRD Detector for Kubernetes

README.md

Unused CRD Detector for Kubernetes

This script lists all Custom Resource Definitions (CRDs) in a Kubernetes cluster and checks how many instances exist for each CRD. It only prints CRDs that have at least one instance.

Prerequisites

• kubectl
• jq

Usage

Run the following command in a terminal:

kubectl get crds -o json | jq -r '.items[].metadata.name' | while read crd; do                                                                                                                 
    count=$(kubectl get "$crd" --no-headers 2>/dev/null | wc -l)
    if [ "$count" -gt 0 ]; then
        echo "$crd: $count"
    fi
done