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Bug 1573960 - lvconvert - don't return success doing -m conversion on degraded raid1 LV
Summary: lvconvert - don't return success doing -m conversion on degraded raid1 LV
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: lvm2
Version: 7.5
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Heinz Mauelshagen
QA Contact: cluster-qe@redhat.com
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-05-02 15:19 UTC by Heinz Mauelshagen
Modified: 2021-09-03 12:39 UTC (History)
9 users (show)

Fixed In Version: lvm2-2.02.178-1.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-10-30 11:02:26 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:3193 0 None None None 2018-10-30 11:03:20 UTC

Description Heinz Mauelshagen 2018-05-02 15:19:34 UTC 
Description of problem:
"lvconvert -mN RaidLV" was used to try repairing a degraded raid1 LV
instead of the recommended "lvconvert --repair RaidLV"

Version-Release number of selected component (if applicable):
2.02.177(2)-RHEL7

How reproducible:
Always

Steps to Reproduce:
1. create e.g. 2-legged raid1 LV in VG with 2 PVs
2. fail 1 PV
3. run "lvconvert -m1 RaidLV"

Actual results:
Leaves the raid1 LV degraded but returns success

Expected results:
Don't return success because the degraded raid1 LV has 2 legs still (one inoperational). Error report in this degraded situation.

Additional info:
https://bugzilla.redhat.com/show_bug.cgi?id=1572528 documents the bogus "lvconvert -m ..." use/behaviour.
Comment 2 Heinz Mauelshagen 2018-05-03 16:52:21 UTC 
lvm2 upstream commit 4ebfd8e8eb68442efc334b35bc1f22eda3e4dd3d
Comment 3 Red Hat Bugzilla Rules Engine 2018-05-03 16:52:30 UTC 
Development Management has reviewed and declined this request. You may appeal this decision by reopening this request.
Comment 7 Roman Bednář 2018-08-07 09:32:33 UTC 
Verified.


# lvs -a -o lv_name,devices
  LV               Devices                            
  root             /dev/vda2(205)                     
  swap             /dev/vda2(0)                       
  raid1            raid1_rimage_0(0),raid1_rimage_1(0)
  [raid1_rimage_0] /dev/sda1(1)                       
  [raid1_rimage_1] /dev/sdb1(1)                       
  [raid1_rmeta_0]  /dev/sda1(0)                       
  [raid1_rmeta_1]  /dev/sdb1(0) 


# echo "offline" > /sys/block/sda/device/state

# pvscan
  /dev/sda: open failed: No such device or address
  Error reading device /dev/sda1 at 0 length 4.
  Error reading device /dev/sda1 at 4096 length 4.
  PV /dev/sda1   VG vg              lvm2 [<29.99 GiB / 28.98 GiB free]
  PV /dev/sdb1   VG vg              lvm2 [<29.99 GiB / 28.98 GiB free]
  ....
  ....
  Total: 11 [306.97 GiB] / in use: 3 [66.97 GiB] / in no VG: 8 [<240.00 Gi

# vgreduce --removemissing -f vg
  WARNING: Not using lvmetad because a repair command was run.
  /dev/sda: open failed: No such device or address
  Couldn't find device with uuid xK7r9b-RZ0o-NBM8-6RH5-Pnwm-ovOF-FUNNYX.
  WARNING: Couldn't find all devices for LV vg/raid1_rimage_0 while checking used and assumed devices.
  WARNING: Couldn't find all devices for LV vg/raid1_rmeta_0 while checking used and assumed devices.
  Wrote out consistent volume group vg.


# vgextend vg /dev/sdc1
  WARNING: Not using lvmetad because a repair command was run.
  /dev/sda: open failed: No such device or address
  /dev/sda1: open failed: No such device or address
  /dev/sda: open failed: No such device or address
  /dev/sda1: open failed: No such device or address
  Volume group "vg" successfully extended

# lvconvert -y -m 1 vg/raid1 /dev/sdc1
  WARNING: Not using lvmetad because a repair command was run.
  /dev/sda: open failed: No such device or address
  /dev/sda1: open failed: No such device or address
  Can't change number of mirrors of degraded vg/raid1.
  Please run "lvconvert --repair vg/raid1" first.
  WARNING: vg/raid1 already has image count of 2.

# lvconvert --repair vg/raid1
  WARNING: Disabling lvmetad cache for repair command.
  WARNING: Not using lvmetad because of repair.
  /dev/sda: open failed: No such device or address
  /dev/sda1: open failed: No such device or address
Attempt to replace failed RAID images (requires full device resync)? [y/n]: y
  Faulty devices in vg/raid1 successfully replaced.

# lvs -a -o lv_name,devices
  WARNING: Not using lvmetad because a repair command was run.
  /dev/sda: open failed: No such device or address
  /dev/sda1: open failed: No such device or address
  LV               Devices                            
  root             /dev/vda2(205)                     
  swap             /dev/vda2(0)                       
  raid1            raid1_rimage_0(0),raid1_rimage_1(0)
  [raid1_rimage_0] /dev/sdc1(1)                       
  [raid1_rimage_1] /dev/sdb1(1)                       
  [raid1_rmeta_0]  /dev/sdc1(0)                       
  [raid1_rmeta_1]  /dev/sdb1(0)  


3.10.0-926.el7.x86_64

lvm2-2.02.180-1.el7    BUILT: Fri Jul 20 19:21:35 CEST 2018
Comment 9 errata-xmlrpc 2018-10-30 11:02:26 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, 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/RHBA-2018:3193
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