Bug 1886823

Created attachment 1720266 [details]
Screencast when the message gets triggered

Description of problem:
-----------------------------

Related to Bug 1885676

Currently, for selected nodes, if the aggregate CPU <30 and aggregate memory <72 GiB, the UI falls back to minimal deployment, wherein limits are reduced for the following pods

a) RGW 
b) OSD 
c) MDS 

Even though the Warning message appears only if CPU<30 and memory<72, but the statement on the screen says

```The selected nodes do not match the OCS storage cluster recommended requirements of an aggregated 42 CPUs and 102 GiB of RAM. If the selection cannot be modified, a minimal cluster will be deployed.```


IMO, this statement is confusing, as looking at the text, it implies that minimal deployment would be triggered in all the cases when CPU<42 and memory<102. Hence, the actual trigger point and the message are a little contradictory.

It would be good to refine the message to clearly state as to when the deployment :

a) really falls back to minimal deployment
b) minimal deployment would mean 1 OSD per node, no support for more OSD



Version-Release number of selected component (if applicable):
-----------------------------------------------
OCS 4.6  and OCP 4.6 and above

How reproducible:
-----------------
Always

Steps to Reproduce:
1. Create an OCP cluster with multiple worker nodes, say 4 CPU and 16 GB memory. 

2. In create storage cluster page, select minimum 3 worker nodes (more can be selected), making sure that total CPU is still less than 30

.
3. Check the warning message


Actual results:
---------------------
The warning message conveys minimal deployment will be used if below recommended config, but trigger is different

Expected results:
---------------------
Refine the statement to clearly match the actual trigger when this message surfaces.

Additional info:
---------------------

from KNIP

>> Detect that it’s a small cluster
CPU is < 30 or if aggregate memory < 72. 


>> highlight in the UI that this is a minimal cluster deployment that can  support only 1 drives 

_____________________________________________]

In the screenscast
------------------------

9 nodes(matser made schedulable too), 4 CPU each = 36 CPU

if all 9 nodes selected = no warning
If 8 nodes selected = 8 * 4 = 32 CPu, no warning
If 7 nodes selected, 7*4 = 28 CPU <required aggregate of 30 CPU - the warning message is triggered

But the warning message still reads

""""""
The selected nodes do not match the OCS storage cluster recommended requirements of an aggregated 42 CPUs and 102 GiB of RAM. If the selection cannot be modified, a minimal cluster will be deployed
"""""