Kubernetes plugin - container is not valid for pod

[Michael Kanchuker‎]

Hi,

Lately I began getting a repeating error in one of my builds: Exec Failure: HTTP:400. Message:container nodejs is not valid for pod admin-builder-d5gwq-ftgs2.

This is a job in a multibranch pipeline running from a Jenkins file (see below). I can see the container in kubectl, and I can run a shell in it.

I don't experience this in my other builds.

I'm running Jenkins v2.249.1 and Kubernetes plugin v1.27.1.

Your help is much appreciated,

Michael Kanchuker.

Jenkinsfile:

podTemplate(label: "admin-builder",
    containers: [
        containerTemplate(name: 'docker', image: 'docker:19.03', ttyEnabled: true, command: 'cat'),
        containerTemplate(name: 'nodejs', image: 'node:12-buster', ttyEnabled: true, command: 'cat')
    ],
    volumes: [hostPathVolume(hostPath: '/var/run/docker.sock', mountPath: '/var/run/docker.sock')]
)
{
    node("admin-builder") {
        stage('Checkout') {
            checkout scm
            container('nodejs') {

Jenkins Log:

Sep 17, 2020 2:56:17 PM SEVERE io.fabric8.kubernetes.client.dsl.internal.ExecWebSocketListener onFailure

Exec Failure: HTTP:400. Message:container nodejs is not valid for pod admin-builder-d5gwq-ftgs2
java.net.ProtocolException: Expected HTTP 101 response but was '400 Bad Request'
	at okhttp3.internal.ws.RealWebSocket.checkResponse(RealWebSocket.java:229)
	at okhttp3.internal.ws.RealWebSocket$2.onResponse(RealWebSocket.java:196)
	at okhttp3.RealCall$AsyncCall.execute(RealCall.java:203)
	at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Sep 17, 2020 2:56:17 PM WARNING jenkins.security.ClassFilterImpl notifyRejected

io.fabric8.kubernetes.api.model.Status in file:/var/jenkins_home/plugins/kubernetes-client-api/WEB-INF/lib/kubernetes-model-core-4.11.1.jar might be dangerous, so rejecting; see https://jenkins.io/redirect/class-filter/

Sep 17, 2020 2:56:17 PM INFO org.csanchez.jenkins.plugins.kubernetes.KubernetesSlave _terminate

Terminating Kubernetes instance for agent admin-builder-d5gwq-ftgs2

Sep 17, 2020 2:56:17 PM INFO org.csanchez.jenkins.plugins.kubernetes.KubernetesSlave deleteSlavePod

Terminated Kubernetes instance for agent jenkins/admin-builder-d5gwq-ftgs2

Sep 17, 2020 2:56:17 PM INFO org.csanchez.jenkins.plugins.kubernetes.KubernetesSlave _terminate

Disconnected computer admin-builder-d5gwq-ftgs2

Sep 17, 2020 2:56:17 PM INFO jenkins.slaves.DefaultJnlpSlaveReceiver channelClosed

Computer.threadPoolForRemoting [#14] for admin-builder-d5gwq-ftgs2 terminated: java.nio.channels.ClosedChannelException

Sep 17, 2020 2:56:17 PM INFO hudson.remoting.Request$2 run

Failed to send back a reply to the request hudson.remoting.Request$2@21eb663a: hudson.remoting.ChannelClosedException: Channel "hudson.remoting.Channel@2c296147:JNLP4-connect connection from 10.42.7.220/10.42.7.220:36320": channel is already closed

Sep 17, 2020 2:56:18 PM INFO org.jenkinsci.plugins.workflow.job.WorkflowRun finish

WB-Services/Admin/jenkins_test #14 completed: FAILURE

[Vincent Latombe]

Try changing your Jenkinsfile to:

podTemplate(

    containers: [
        containerTemplate(name: 'docker', image: 'docker:19.03', ttyEnabled: true, command: 'cat'),
        containerTemplate(name: 'nodejs', image: 'node:12-buster', ttyEnabled: true, command: 'cat')
    ],
    volumes: [hostPathVolume(hostPath: '/var/run/docker.sock', mountPath: '/var/run/docker.sock')]
)
{

    node(POD_LABEL) {

        stage('Checkout') {
            checkout scm
            container('nodejs') {

...

Vincent

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[Michael Kanchuker‎]

Thank you very much, It works now.

I didn't know pod template inheritance was a thing.

Michael.