I'm trying to reuse the same POD on all build executions but I can't even by setting the option idleMinutes to 1h for example. For each execution, the POD's name and it's labels are always different. Perhaps this is the main cause. I think that I must do something else together with idleMinutes to make it reusable by kubernetes-plugin, but I don't which option should I need to use to achieve that. The documentation isn't clear enough about it.

Here is a snippet: of what I'm doing:

I have a file called cicd-pod.yaml which serves as pod template. Here is it's contents:

apiVersion: v1
kind: Pod
metadata:
labels:
  eks.amazonaws.com/fargate-profile: jenkins
  nodegroup: fargate
spec:
containers:
  - name: kubernetes
    imagePullPolicy: IfNotPresent
    image: ubuntu:latest
    resources:
      requests:
        cpu: "3"
      limits:
        cpu: "4"
     command: ['cat']
     tty: true

Here is the declarative pipeline snipet:

pipeline {
  agent {
    kubernetes {
      slaveConnectTimeout "600"
      idleMinutes "60"
      yamlFile "cicd-pod.yaml"
    }
  }

  stages {
    stage('Prepare POD') {
      steps {
        container('kubernetes') {
          sh 'echo test'
        }
      }
    }
  }
}