How to define workspace volume for jenkins pipeline declarative

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'            }        }    }}

Here is an example for declarative pipeline:

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

If you post your jenkins deployment then I might help in that.

Mean while you can visit this yaml that I used and worked very well for me.

apiVersion: extensions/v1beta1kind: Deploymentmetadata:  name: jenkinsspec:  replicas: 1  template:    metadata:      labels:        app: jenkins    spec:      containers:      - name: jenkins        image: jenkins:2.32.2        ports:        - containerPort: 8080        volumeMounts:          - name: jenkins-home            mountPath: /var/jenkins_home      volumes:        - name: jenkins-home          emptyDir: {}