Bug 1701385

Summary:	Inconsistent HDD requirements between RHHI and RHV
Product:	Red Hat Enterprise Virtualization Manager	Reporter:	John Call <jcall>
Component:	Documentation	Assignee:	Rolfe Dlugy-Hegwer <rdlugyhe>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Tahlia Richardson <trichard>
Severity:	unspecified	Docs Contact:
Priority:	medium
Version:	2.1.0	CC:	lsurette, rbarry, rdlugyhe, seamurph, srevivo, tburke, trichard
Target Milestone:	ovirt-4.3.4	Keywords:	Documentation, Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2019-04-26 16:08:54 UTC	Type:	Bug
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	Docs	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description John Call 2019-04-18 20:07:44 UTC

Description of problem:
The docs for RHV require 15GB (/var) and 8GB (/var/log) per [1]
The docs for RHHI require 22GB (/var) and 15GB (/var/log) per [2] and [3]

In addition, the latest 4.3beta installation automatically creates a /var/crash partition.  In my case it created a 10Gb logical volume.  This requirement is *not* documented.



[1] RHV 4.3beta docs - https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.3-beta/html-single/planning_and_prerequisites_guide/index#Storage_Requirements_RHV_planning

[2] RHHI 1.5 docs - https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infrastructure_for_virtualization/1.5/html-single/deploying_red_hat_hyperconverged_infrastructure_for_virtualization/index#rhhi-req-storage

[3] Ansible check for Gluster_HCI role - https://github.com/gluster/gluster-ansible-features/blob/master/roles/gluster_hci/tasks/prerequisites.yml#L52

Comment 1 Rolfe Dlugy-Hegwer 2019-04-19 00:02:57 UTC

Hi John. Thanks for reporting this. I'll update the doc accordingly. To better understand this issue, I have to ask:

- At face value, it seems like RHHI (along with RHV and RHGS) *should* require more space than RHV alone. Is that wrong?

- I'll confirm the /var/crash requirement with someone else and document it.

Comment 2 John Call 2019-04-19 21:42:56 UTC

Hi Rolfe, thanks!  I would agree that RHHI requires at least the same amount of space as RHV, if not more...  I'll put a needinfo against Sean Murphy to see if he or someone on his team can answer definitively.

Comment 3 John Call 2019-04-22 14:16:21 UTC

I think this bug may be a partial dup of https://bugzilla.redhat.com/show_bug.cgi?id=1565155

but i overloaded this bug with the /var/crash issue and the issue of checking the size of the /var/log logical volume via "df" instead of something like "lvs -o lv_size"

Comment 4 John Call 2019-04-23 13:12:43 UTC

https://bugzilla.redhat.com/show_bug.cgi?id=1683075

Comment 5 Rolfe Dlugy-Hegwer 2019-04-24 11:41:58 UTC

(In reply to John Call from comment #4)
> https://bugzilla.redhat.com/show_bug.cgi?id=1683075

Thanks for the link to that bug. Okay, so it seems like the differing /var and /var/log sizes is a non-issue.
I'll document the /var/crash partition.

Comment 10 Rolfe Dlugy-Hegwer 2019-04-26 16:08:54 UTC

Verified and merged.