How to execute CMD command on jenkins windows slave using groovy? - windows

Question

I am trying to execute cmd /c echo hello using groovy on a jenkins slave running on windows.
Here is my groovy:
node('WINDOWS-SLAVE-1') {
def cmd_command = "cmd /c echo hello"
cmd_command.execute()
}
And I can see in the job logs that it is indeed running on that windows slave: 'Running on WINDOWS-SLAVE-1'
But I get an error: java.io.IOException: error=2, No such file or directory
And if I try to run linux like ls -l it works fine. Shows me the files of my master.
How can I execute this CMD command on my windows jenkins slave from my groovy script?

Answer 1

If your intention is to execute a command on a given node, you need to use one of the Jenkins Pipeline's steps designed to execute shell scripts (e.g. sh or bat). You need to be aware that any Groovy code in your Jenkinsfile is always executed on the master node:
"1. Except for the steps themselves, all of the Pipeline logic, the Groovy conditionals, loops, etc execute on the master. Whether simple or complex! Even inside a node block!"
Source: https://jenkins.io/blog/2017/02/01/pipeline-scalability-best-practice/#fundamentals
node('WINDOWS-SLAVE-1') {
bat "cmd /c echo hello"
}