Can this be added as a new Chapter in the Upgrade section?

Yes, we should have a new chapter for "upgrade using the playbook".

There we should have the note which says it is in tech preview;
Then there will be a list of required and optional variables that need to be provided in the inventory.

Updated the required content as Note 

https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/3.11/html-single/deployment_guide/index?lb_target=preview#chap-upgrade_using_the_playbook

Hello, 

I see that this bug has been updated as a note in chapter 7: upgrading using the playbook. 
But, there are errors in the statement, which I think should be corrected.
@Anjana KD, please proofread before pushing changes and moving the bug to ON_QA. Moving this bug to FailedQA. Please reach out to me should you need any help. 

Please update this note: 

NOTE
While running the Openshift Container Storage upgrade playbook runs, the cluster admin needs to check the health of the cluster and all the pods and nodes in the cluster. The upgrade playbook does not fail or give a warning if app-pods running on the cluster fails or enters error state while the upgrade is in process. The cluster admin is to keep a check on the app-pods and the entire cluster health.

(In reply to Ashmitha Ambastha from comment #12)
> Hello, 
> 
> I see that this bug has been updated as a note in chapter 7: upgrading using
> the playbook. 
> But, there are errors in the statement, which I think should be corrected.
> @Anjana KD, please proofread before pushing changes and moving the bug to
> ON_QA. Moving this bug to FailedQA. Please reach out to me should you need
> any help. 
> 
> Please update this note: 
> 
> NOTE
> While running the Openshift Container Storage upgrade playbook runs, the
> cluster admin needs to check the health of the cluster and all the pods and
> nodes in the cluster. The upgrade playbook does not fail or give a warning
> if app-pods running on the cluster fails or enters error state while the
> upgrade is in process. The cluster admin is to keep a check on the app-pods
> and the entire cluster health.

Hello Ashmitha,

Based on our discussion in the office, I had added the above Note. Please let me know how could this be improved and could you provide more clarity. 
Just to be clear, I did proof-read the Note, still not sure what is wrong here.

Hello Anjana, 

This is what is wrong,

NOTE
While running the Openshift Container Storage upgrade playbook runs*, the cluster-admin needs to check the health of the cluster and all the pods and nodes in the cluster. The upgrade playbook does not fail or give a warning if app-pods running on the cluster fails* or enters <into a> error state while the OCS* upgrade is in process. The cluster admin is to keep a check on the app-pods and the entire cluster* health.


I've marked the words that need change with an asterisk(*) and what I've added is within arrow brackets.
The note can be made shorter and more concise as well, but I leave it up to you to decide on that.

Rephrased the Note.

Review link: https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/3.11/html-single/deployment_guide/index?lb_target=stage#chap-upgrade_using_the_playbook

LGTM, moving the bug to verified.