Bug 231874
Summary: | vgcfgbackup does not work with partial lvm1 vg despite the fact that lvs exist with all pvs accounted for | ||||||
---|---|---|---|---|---|---|---|
Product: | [Fedora] Fedora | Reporter: | Dave Wysochanski <dwysocha> | ||||
Component: | lvm2 | Assignee: | Dave Wysochanski <dwysocha> | ||||
Status: | CLOSED WONTFIX | QA Contact: | Corey Marthaler <cmarthal> | ||||
Severity: | medium | Docs Contact: | |||||
Priority: | low | ||||||
Version: | 9 | CC: | agk, dwysocha, jbrassow, mbroz, prockai | ||||
Target Milestone: | --- | ||||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2009-07-14 15:19:13 UTC | Type: | --- | ||||
Regression: | --- | Mount Type: | --- | ||||
Documentation: | --- | CRM: | |||||
Verified Versions: | Category: | --- | |||||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
Cloudforms Team: | --- | Target Upstream Version: | |||||
Embargoed: | |||||||
Attachments: |
|
Description
Dave Wysochanski
2007-03-12 18:38:49 UTC
I wonder if making check_pv_segments a method of struct metadata_area_ops would be a good part of the solution. That way we could isolate this change for lvm1 and reduce risk. Seems to make sense too, since those summation checks should never fail for LVM2 unless something is truly corrupted, whereas on LVM1 they will fail if a PV is missing. Created attachment 149855 [details]
Major hack - just skip failure on PE checks in check_pv_segments and check_lv_segments if partial flag is set
Proof of concept patch. Amazingly, this is all I needed to get past the
failure and write the backup file. Not sure if the backup file is usable but
it looks pretty good. I have 'lvol1' - 'lvol3' that look valid. 'lvol4' and
'lvol5' look like they were on the missing PV(s) - the backup file has a long
list of segments like this for 'lvol4' and 'lvol5':
segment197 {
start_extent = 196
extent_count = 1 # 32 Megabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"Missing", 0
]
}
There's clearly something wrong with the lvm1 format code. See also the stripe bug posted to lvm-devel. The code that reads in the stripes is broken - it misses a factor of #stripes when setting the total segment length and the algorithm to calculate the area length in the segment looks bogus. We also wanted it to give the PV IDs instead of 'Missing' and not to create a separate segment for each extent. Not sure this is worth doing. Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping This message is a reminder that Fedora 9 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 9. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '9'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 9's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 9 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed. |