Ansible jenkins pipeline

pipeline1.groovy

		stage( 'Switch to backup' ) {
			agent {
				node {
					label 'ansible'
				}
			}
			when {
				environment name: "SERVER", value: "backup-master"
			}
			environment {
				INSTANCE_ID_TO_REGISTER		= "${env.JENKINS_BACKUP_ID}"
				INSTANCE_ID_TO_DEREGISTER	= "${env.JENKINS_MASTER_ID}"
			}
			steps {
				ansiblePlaybook("${env.WORKSPACE}/switch.yml") {
					forks(5) //Equivalent to 'Number of parallel processes'
					unbufferedOutput(true)
					hostKeyChecking(false)
					additionalParameters("-e 'ansible_python_interpreter=/usr/bin/python2.7' -c paramiko")
				}
			}
		}