Scaling EKS cluster

scaling-eks-cluster.groovy

def roleArn = "arn:aws:iam:123467890:role/jenkins-iam"
def profile = "--profile devops"
//In Terraform I prefer using argumnet "ignore_changes" inside "lifecycle" block for the NodeGroup
//and manage the Nodes count independentely to control the cost & easy operations
pipeline{

   agent {
    kubernetes {
      yaml '''
        apiVersion: v1
        kind: Pod
        spec:
          containers:
          - name: awscli
            image: amazon/aws-cli:latest
            command:
            - cat
            tty: true
        '''
    }
  }

  parameters {
  choice(name: "REGION_NAME", choices: ["us-east-1", "us-east-2"], description: "Choose the region")
  text(name: "COMMENT", defaultValue: "Please write comment & reference Ticket number")
  choice(name: "CLUSTER_NAME", choices: ["prod-primary", "prod-secondary"], description: "Choose the cluster)
  choice(name: "NODEGROUP_NAME", choices: ["prod-primary-fe", "prod-secondary-fe"], description: "Choose the NodeGroup")
  string(name: "DESIRED_SIZE",defaultValue: "0", trim: true, description: "Please enter integer value" )
  }
  
  stages {
  stage("Input validation") {
     script {
       if (env.DESIRED_SIZE.isInteger()){
        int value = env.DESIRED_SIZE as Integer
        try{
          if (value > 10 || value < 0){
             throw new Exception("error")
              }
             }
        catch (Exception ignore){
           echo "Error: Node count is either too High or Invalid."
           currentBuild.result = 'ABORTED'
           error("Aborting the build. Please check with the relavant team")
            }
           }
       else{
          currentBuild.result = 'ABORTED'
          error("Aborting the build. Please provide Integer number for Node size")
          }
         }
       }
    stage('Checking number of nodes') {
      steps {
        container('awscli') {
          sh "aws ${profile} configure set role_arn ${roleArn} && aws ${profile} configure set credential_source Ec2InstanceMetadata"
          sh "aws eks ${profile} describe-nodegroup --cluster-name $params.CLUSTER_NAME --nodegroup-name $params.NODEGROUP_NAME --region $params.REGION_NAME" 
          sh "aws eks ${profile} update-nodegroup-config --scaling-config minSize=$params.DESIRED_SIZE,maxSize=$params.DESIRED_SIZE,desiredSize=$params.DESIRED_SIZE --cluster-name $params.CLUSTER_NAME --nodegroup-name $params.NODEGROUP_NAME --region $params.REGION_NAME"        
          }
      }
    }
  }
}