def label = "mypod-${UUID.randomUUID().toString()}"
podTemplate(label: label, yaml: """
apiVersion: v1
kind: Pod
metadata:
  labels:
    some-label: some-label-value
spec:
  containers:
  - name: jnlp
    image: 1234567890.dkr.ecr.us-east-1.amazonaws.com/jenkins-slave:1.0.0
    command:
    - /usr/local/bin/jenkins-slave
    tty: true
    securityContext:
      runAsUser: 10000
      allowPrivilegeEscalation: false
"""
) {
    node (label) {
      container('jnlp') {
        sh "hostname"
        sh "mvn --version"
      }
    }
}

[Pipeline] node
Agent mypod-6cf91ebc-71db-4c56-80c8-8f332d796ccf-413hd-m09jd is provisioned from template Kubernetes Pod Template
Agent specification [Kubernetes Pod Template] (mypod-6cf91ebc-71db-4c56-80c8-8f332d796ccf): 
* [jnlp] jenkins/jnlp-slave:alpine
yaml:

apiVersion: v1
kind: Pod
metadata:
  labels:
    some-label: some-label-value
spec:
  containers:
  - name: jnlp
    image: 1234567890.dkr.ecr.us-east-1.amazonaws.com/jenkins-slave:1.0.0
    command:
    - /usr/local/bin/jenkins-slave
    tty: true
    securityContext:
      runAsUser: 10000
      allowPrivilegeEscalation: false


Running on mypod-6cf91ebc-71db-4c56-80c8-8f332d796ccf-413hd-m09jd in /home/jenkins/workspace/TDP/builds/test-slaves
[Pipeline] {
[Pipeline] container
[Pipeline] {
[Pipeline] sh
+ hostname
mypod-6cf91ebc-71db-4c56-80c8-8f332d796ccf-413hd-m09jd
[Pipeline] sh
+ mvn --version
/home/jenkins/workspace/ABC/builds/test-slaves@tmp/durable-ef4c2933/script.sh: line 1: mvn: not found
[Pipeline] }
[Pipeline] // container
[Pipeline] }
[Pipeline] // node
[Pipeline] }
[Pipeline] // podTemplate
[Pipeline] End of Pipeline
[Office365connector] No webhooks to notify
ERROR: script returned exit code 127
Finished: FAILURE