List all apiVersions for each resource type in a Kubernetes cluster

list-apiversions.sh

#!/bin/bash

# Get the list of resource types
resource_types=$(kubectl api-resources | tail +2 | awk '{ print $1 }')

# Iterate over each resource type
for resource_type in $resource_types; do
    echo "Resource Type: $resource_type"
    
    # Get the latest usable apiVersion
    latest_version=$(kubectl explain $resource_type | grep -e "VERSION:" | awk '{ print $2 }')
    echo "Latest Version: $latest_version"
    
    # Get other possible versions supported by the cluster
    supported_versions=$(kubectl api-versions | grep -E "^$resource_type/" | awk -F/ '{ print $2 }')
    
    if [[ -n $supported_versions ]]; then
        echo "Supported Versions:"
        for version in $supported_versions; do
            echo "- $version"
        done
    else
        echo "No other versions supported."
    fi
    
    echo "-------------------------------------------"
done