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Persisting State through the emptyDir Volume Type

Persisting State through the emptyDir Volume Type

In this lesson, we will analyze the state of an updated Jenkins Deployment and discuss emptyDir Volume type.

Updating the Jenkins Deployment Definition

Let’s take a look at a slightly updated YAML definition.

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cat volume/jenkins-empty-dir.yml

The output, limited to the relevant parts, is as follows.

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...
kind: Deployment
...
spec:
  ...
  template:
    ...
    spec:
      containers:
        ...
        volumeMounts:
        - mountPath: /var/jenkins_home
          name: jenkins-home
      volumes:
      - emptyDir: {}
        name: jenkins-home
...

We added a mount that references the jenkins-home Volume. The Volume type is, this time, emptyDir. We’ll discuss the new Volume type soon. But, before we dive into explanations, we’ll try to experience its effects.

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kubectl apply \
    -f volume/jenkins-empty-dir.yml
kubectl rollout status deploy jenkins

We applied the new definition and waited until the rollout finished.

Now we can open the New Job Jenkins screen and repeat the same process we followed before.

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open "http://$(minikube ip)/jenkins/newJob"

Please type test in the ...

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