kubernetes version check for eks

eks_version.go

package main

import (
	"context"
	"fmt"
	"log"

	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/service/eks"
	"github.com/aws/aws-sdk-go/aws"
)

func main() {
	// Load the AWS SDK configuration
	// cfg, err := config.LoadDefaultConfig(context.TODO())
	cfg, err := config.LoadDefaultConfig(context.TODO(),
		config.WithSharedConfigProfile("ksctl"), config.WithRegion("ap-south-1"))
	if err != nil {
		log.Fatalf("Unable to load SDK config, %v", err)
	}

	// Create an EKS client
	client := eks.NewFromConfig(cfg)

	// Create the input for DescribeAddonVersions
	input1 := &eks.DescribeAddonVersionsInput{}

	// Call DescribeAddonVersions
	result11, err := client.DescribeAddonVersions(context.TODO(), input1)
	if err != nil {
		log.Fatalf("Unable to describe addon versions, %v", err)
	}

	// Extract and print the unique add-on names
	addons := make(map[string]struct{})
	for _, addon := range result11.Addons {
		if addon.AddonName != nil {
			addons[*addon.AddonName] = struct{}{}
		}
	}

	fmt.Println("Available EKS core add-ons:")
	for addon := range addons {
		fmt.Println(addon)
	}

	//////////////
	fmt.Println("=====================================")
	input := &eks.DescribeAddonVersionsInput{
		AddonName:         aws.String("vpc-cni"), // You can change this to any core addon
		KubernetesVersion: aws.String(""),        // Empty string to get all versions
	}

	// Call DescribeAddonVersions
	result, err := client.DescribeAddonVersions(context.TODO(), input)
	if err != nil {
		log.Fatalf("Unable to describe addon versions, %v", err)
	}

	// Extract and print the Kubernetes versions
	versions := make(map[string]struct{})
	for _, addon := range result.Addons {
		for _, addonVersion := range addon.AddonVersions {
			for _, k8sVersion := range addonVersion.Compatibilities {
				if k8sVersion.ClusterVersion != nil {
					versions[*k8sVersion.ClusterVersion] = struct{}{}
				}
			}
		}
	}

	fmt.Println("Available Kubernetes versions:")
	for version := range versions {
		fmt.Println(version)
	}
}