Running integration tests using testcontainers on Jenkins with the Kubernetes Plugin

Jenkinsfile

def pod =
"""
apiVersion: v1
kind: Pod
metadata:
  labels:
    name: worker
spec:
  serviceAccountName: jenkins
  containers:
    - name: maven
      image: maven:3.6.3-jdk-8
      resources:
        requests:
          cpu: "1000m"
          memory: "2048Mi"
      imagePullPolicy: Always
      tty: true
      command: ["cat"]
    - name: dind
      image: docker:dind
      imagePullPolicy: Always
      tty: true
      env:
        - name: DOCKER_TLS_CERTDIR
          value: ""
      securityContext:
        privileged: true
"""

pipeline {
    agent {
        kubernetes {
            yaml pod
        }
    }
    options {
        skipStagesAfterUnstable()
    }
    environment {
        DOCKER_HOST = 'tcp://localhost:2375'
        DOCKER_TLS_VERIFY = 0
    }
    stages {
        stage('Test') {
            steps {
                container('maven') {
                    script {
                        sh "mvn test -P integration"
                    }
                }
            }
            post {
                always {
                    junit '**/surefire-reports/TEST-*.xml'
                }
            }
        }
    }
}

DOCKER_TLS_CERTDIR="" - disable TLS certificates generation (which is enabled by default since docker 18.09+) in dind container.
DOCKER_HOST="tcp://localhost:2375" - change default value to non-TLS endpoint for testcontainers
DOCKER_TLS_VERIFY=0 - disable TLS verification for testcontainers

kudos to @fr1zle
https://timmhirsens.de/posts/2019/07/testcontainers_on_jenkins_with_kubernetes/