Bug 2185588

Summary:	[CEE/sd][Ceph-volume] wrong block_db_size computed when adding OSD
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Tridibesh Chakraborty <trchakra>
Component:	Ceph-Volume	Assignee:	Guillaume Abrioux <gabrioux>
Status:	CLOSED ERRATA	QA Contact:	Manisha Saini <msaini>
Severity:	medium	Docs Contact:	Akash Raj <akraj>
Priority:	unspecified
Version:	5.3	CC:	akraj, bkunal, ceph-eng-bugs, cephqe-warriors, gabrioux, gjose, msaini, stockage-dnum, tserlin, vereddy
Target Milestone:	---
Target Release:	6.1
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ceph-17.2.6-20.el9cp	Doc Type:	Bug Fix
Doc Text:	.The correct size is calculated for each database device in `ceph-volume` Previously, as of RHCS 4.3, `ceph-volume` would not make a single VG with all database devices inside, since each database device had its own VG. Due to this, the database size was calculated differently for each LV. With this release, the logic is updated to take into account the new database devices with LVM layout. The correct size is calculated for each database device.	Story Points:	---
Clone Of:
Clones:	2186515 2186787 (view as bug list)		Environment:
Last Closed:	2023-06-15 09:17:19 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2186515, 2186787, 2192813

Description Tridibesh Chakraborty 2023-04-10 12:14:50 UTC

Description of problem:

When creating non-collocated OSDs, ceph-volume is not consider all the db devices to calculate the space and then allocate block_db_size for the OSDs

Version-Release number of selected component (if applicable):
RHCS 5.3z1 / 16.2.10-138.el8cp

How reproducible:
It is happening all the time

Steps to Reproduce:
1. Add couple of new disks for the non-collocated OSD scenario
2. Specify few of the disks as data disk and couple of them as db device in service configuration file without specifying the block_db_size
3. Now apply the specs file
4. You will notice the db devices created with the size as size of single disk/total number of data disks instead of total size of all the db devices divided by number of total data disks

Actual results:

block_db_size is getting calculated smaller than the actual size it should select automatically

Expected results:

ceph-volume should consider all the db devices to calculate the block_db_size


Additional info:

This is already identified and fixed in upstream (verified in 17.2.5) but not yet backported into RHCS 5 / Pacific

https://tracker.ceph.com/issues/56031
https://tracker.ceph.com/issues/56629
https://github.com/ceph/ceph/pull/47292

Comment 27 errata-xmlrpc 2023-06-15 09:17:19 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: Red Hat Ceph Storage 6.1 security and bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:3623