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Cover image for How to use Persistent Storage in OpenShift?
Sagar Jadhav
Sagar Jadhav

Posted on • Updated on • Originally published at developersthought.in

How to use Persistent Storage in OpenShift?

#devops #openshift #kubernetes #mongodb

Objective

  • Deploy Mongodb Application
  • Create PersistentVolumeClaim
  • Assign PersistentVolumeClaim to Mongodb Application
  • Verify that data gets stored in Persistent Storage

Step 1: Set up OpenShift environment

Go to Katacoda.com & click on start scenario

Step 2: Update environment permissions 

setenforce 0
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Step 3: Deploy mongodb application 

oc new-app --name mongo -l app=db --docker-image=centos/mongodb-36-centos7 -e MONGODB_ADMIN_PASSWORD=secret
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Step 4: List pods 

oc get pods
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Step 5: Describe pod 

oc describe pod <POD_NAME>
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Step 6: Create PersistentVolumeClaim & assign it to mongodb application 

oc set volume dc/mongo --add --name=<PVC_NAME> -t pvc --claim-size=10Gi  --overwrite --claim-mode="ReadWriteMany"
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Example: oc set volume dc/mongo --add --name=mongo-volume-1 -t pvc --claim-size=10Gi  --overwrite --claim-mode="ReadWriteMany"
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Step 7: List PersistentVolumeClaims (PVC's) 

oc get pvc
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Step 8: List PersistentVolumes (PV's) 

oc get pv
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Step 9: Describe pod 

oc describe pod <POD_NAME>
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Step 10: Describe PersistentVolume (PV) 

oc describe pv <PV_NAME>
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Step 11: List files

Go to PV location

ls
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