How to define workspace volume for jenkins pipeline declarative

Question

I am trying to setup declarative pipeline where I would like to persiste workspace as volume claim so large git checkout can be faster. Based on doc there are options workspaceVolume and persistentVolumeClaimWorkspaceVolume but I am not able to make it work - jenkins always does following:

volumeMounts:
 - mountPath: "/home/jenkins/agent"
   name: "workspace-volume"
   readOnly: false
volumes:
  - emptyDir: {}
    name: "workspace-volume"

Answer 1

Try something like

podTemplate(
    containers: [
        containerTemplate(name: 'tree', image: 'iankoulski/tree', ttyEnabled: true, command: 'cat')
    ], 
    workspaceVolume: persistentVolumeClaimWorkspaceVolume(claimName: 'workspace', readOnly: false),
) {
    node(POD_LABEL) {
        stage('read workspace') {
            checkout scm
            container('tree') {
                sh 'env'
                sh 'tree'
                sh 'test -f old-env.txt && cat old-env.txt'
                sh 'env > old-env.txt'
            }
        }
    }
}

Answer 2

Here is an example for declarative pipeline:

pipeline {
agent {
    kubernetes {
        yamlFile 'jenkins/pv-pod.yaml'
        workspaceVolume persistentVolumeClaimWorkspaceVolume(claimName: 'workspace', readOnly: false)
    }
}