OpenShift Storage, Persistent Volume Claim (PVC), PV (OpenShift Administration Part-3) Red Hat Ex280

OpenShift Storage, Persistent Volume Claim (PVC), PV (OpenShift Administration Part-3) Red Hat Ex280
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OpenShift Storage
Persistent Volume Claim (PVC)
Persistent Volume (PV)
Demo - Container with Persistent Database
** If new to Docker, Podman, Kubernetes and Openshift then first see -- • Docker, Podman, Contai...
commands--
oc get storageclass
oc new-app --name postgresql-persistent --image registry.redhat.io/rhel8/postgresql-13:1-7 -e POSTGRESQL_USER=redhat -e POSTGRESQL_PASSWORD=redhat123 -e POSTGRESQL_DATABASE=persistentdb
oc set volumes deployment/postgresql-persistent --add --name postgresql-storage --type pvc --claim-class nfs-storage --claim-mode rwo --claim-size 10Gi --mount-path /var/lib/pgsql --claim-name postgresql-storage
oc get pvc
oc get pv
oc delete all -l app=postgresql-persistent
oc new-app --name postgresql-persistent2 --image registry.redhat.io/rhel8/postgresql-13:1-7 -e POSTGRESQL_USER=redhat -e POSTGRESQL_PASSWORD=redhat123 -e POSTGRESQL_DATABASE=persistentdb
oc set volumes deployment/postgresql-persistent2 --add --name postgresql-storage --type pvc --claim-name postgresql-storage --mount-path /var/lib/pgsql
oc delete all -l app=postgresql-persistent2
oc delete pvc/postgresql-storage

[@deepikasingh2931]

Thanks Sir for detail content. I am preparing for ex280, I believe this content will very useful. I have cleared Ex180 by seeing you tutorial series on Ex180. Thanks once again.

[@techtejendra4782]

Keep it up

[@kd6613]

[00:02] Introduction to Chapter 3 of the Red Hat OpenShift Administration tutorial.
[00:16] Discussion on OpenShift Storage, Persistent Volume Claim (PVC), and Persistent Volume (PV).
[00:30] Explanation of a lab demo on creating an application, attaching PVC and PV, and testing data persistence.
[00:58] Emphasis on the volatile nature of data stored inside containers.
[01:13] Containers in OpenShift clusters are dynamic; data inside can be lost if the container is removed.
[01:26] The need for persistent storage to ensure data remains even if the container is removed.
[02:22] Introduction to default storage classes provided by OpenShift.
[02:37] Comparison of cloud storage options like AWS's S3.
[03:30] Process of creating a PVC and then attaching it to an application.
[04:10] Beginning of the demo to showcase the concepts discussed.
[05:11] Explanation of storage classes in OpenShift.
[05:50] Creation of a PostgreSQL database application inside a container.
[06:18] Details on setting up the application using a specific image and environment variables.
[07:38] Checking the status of the created application.
[08:22] Attaching a volume to the application for persistent storage.
[10:02] Emphasis on the importance of the mount path for data persistence.
[11:59] Using scripts to insert and check data in the PostgreSQL database.
[13:38] Checking the inserted data.
[14:03] Explanation on how data remains persistent even if the application is removed.
[15:55] Creating a new application and checking its data.
[16:37] Attaching the previous volume to the new application to retrieve the persisted data.
[18:18] Highlighting the importance of persistent storage in OpenShift.
[18:44] Deleting the application and explaining the relationship between PVC and projects.
[19:15] Emphasis on the significance of PVC for data persistence.
[19:43] Conclusion of the tutorial.

[@MnvSudhakar]

I guess we create PVC along with deployment, PVC will be attached to PV. The PV will inherit from storage-class .. Please correct me if I am wrong.

[@TechhSavvy]

Really great video. any new video coming ?

[@divyajyothi2563]

Nice

[@AwargiforSirTarar]

Where i can find these scripts?

[@suribabu1325]

what exactly ./check.script has please provideme

[@MnvSudhakar]

how can we login as kube-admin .. when i login to my sandbox, default it is logging in as developer.. Please include that step, how we login to openshift cluster as kube-admin user .. Thanks