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Bug 1638084

Summary:	upconvert attempt after secondary mirror leg failure causes clvmd to hang and gfs to withdraw [rhel-7.6.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Oneata Mircea Teodor <toneata>
Component:	lvm2	Assignee:	LVM and device-mapper development team <lvm-team>
lvm2 sub component:	Clustered Mirror / cmirrord	QA Contact:	cluster-qe <cluster-qe>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	high
Priority:	high	CC:	agk, cluster-qe, cmarthal, heinzm, jbrassow, mcsontos, mjuricek, msnitzer, msuchane, ncroxon, prajnoha, rbednar, rhandlin, salmy, teigland, toneata, zkabelac
Version:	7.6	Keywords:	Regression, ZStream
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	lvm2-2.02.180-9.el7.1	Doc Type:	If docs needed, set a value
Doc Text:	Previously, clustered LVM caused the GFS file system to withdraw when the secondary mirror leg failed with auto allocation. As a consequence, all commands using the lvm utility became unresponsive. With this update, the problem has been fixed.	Story Points:	---
Clone Of:	1628529	Environment:
Last Closed:	2018-10-30 12:22:03 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:
Bug Depends On:	1628529
Bug Blocks:

Description Oneata Mircea Teodor 2018-10-10 15:46:50 UTC

This bug has been copied from bug #1628529 and has been proposed to be backported to 7.6 z-stream (EUS).

Comment 4 Corey Marthaler 2018-10-11 21:59:38 UTC

This test case passes with the latest lvm 7.6.z build (the rpm version listed in the errata): lvm2-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018


3.10.0-957.el7.x86_64

lvm2-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
lvm2-libs-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
lvm2-cluster-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
lvm2-lockd-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
lvm2-python-boom-0.9-11.el7    BUILT: Mon Sep 10 04:49:22 CDT 2018
cmirror-2.02.180-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
device-mapper-1.02.149-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
device-mapper-libs-1.02.149-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
device-mapper-event-1.02.149-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
device-mapper-event-libs-1.02.149-10.el7_6.1    BUILT: Wed Oct 10 12:43:42 CDT 2018
device-mapper-persistent-data-0.7.3-3.el7    BUILT: Tue Nov 14 05:07:18 CST 2017


Enabling mirror allocate fault policies on: mckinley-01 mckinley-02 mckinley-03
================================================================================
Iteration 0.1 started at Thu Oct 11 16:31:55 CDT 2018
================================================================================
Scenario kill_secondary_synced_3_legs: Kill secondary leg of synced 3 leg mirror(s)
********* Mirror hash info for this scenario *********
* names:              syncd_secondary_3legs_1
* sync:               1
* striped:            0
* leg devices:        /dev/mapper/mpathc1 /dev/mapper/mpatha1 /dev/mapper/mpathe1
* log devices:        /dev/mapper/mpathd1
* no MDA devices:     
* failpv(s):          /dev/mapper/mpatha1
* failnode(s):        mckinley-01 mckinley-02 mckinley-03
* lvmetad:            0
* leg fault policy:   allocate
* log fault policy:   allocate
******************************************************

Creating mirror(s) on mckinley-03...
mckinley-03: lvcreate -ay --type mirror -m 2 -n syncd_secondary_3legs_1 -L 500M helter_skelter /dev/mapper/mpathc1:0-2400 /dev/mapper/mpatha1:0-2400 /dev/mapper/mpathe1:0-2400 /dev/mapper/mpathd1:0-150

Current mirror/raid device structure(s):
  LV                                 Attr       LSize   Cpy%Sync Devices
   syncd_secondary_3legs_1            mwi-a-m--- 500.00m 8.80     syncd_secondary_3legs_1_mimage_0(0),syncd_secondary_3legs_1_mimage_1(0),syncd_secondary_3legs_1_mimage_2(0)
   [syncd_secondary_3legs_1_mimage_0] Iwi-aom--- 500.00m          /dev/mapper/mpathc1(0)
   [syncd_secondary_3legs_1_mimage_1] Iwi-aom--- 500.00m          /dev/mapper/mpatha1(0)
   [syncd_secondary_3legs_1_mimage_2] Iwi-aom--- 500.00m          /dev/mapper/mpathe1(0)
   [syncd_secondary_3legs_1_mlog]     lwi-aom---   4.00m          /dev/mapper/mpathd1(0)

Waiting until all mirror|raid volumes become fully syncd...
   1/1 mirror(s) are fully synced: ( 100.00% )
Sleeping 15 sec
Sleeping 15 sec
Sleeping 15 sec

Creating gfs2 on top of mirror(s) on mckinley-01...
mkfs.gfs2 -o align=0 -J 32M -j 3 -p lock_dlm -t MCKINLEY:gfs1 /dev/helter_skelter/syncd_secondary_3legs_1 -O
Mounting mirrored gfs2 filesystems on mckinley-01...
Mounting mirrored gfs2 filesystems on mckinley-02...
Mounting mirrored gfs2 filesystems on mckinley-03...

PV=/dev/mapper/mpatha1
        syncd_secondary_3legs_1_mimage_1: 4.1
PV=/dev/mapper/mpatha1
        syncd_secondary_3legs_1_mimage_1: 4.1

Writing verification files (checkit) to mirror(s) on...
        ---- mckinley-01 ----
        ---- mckinley-02 ----
        ---- mckinley-03 ----

Sleeping 15 seconds to get some outsanding I/O locks before the failure 
Verifying files (checkit) on mirror(s) on...
        ---- mckinley-01 ----
        ---- mckinley-02 ----
        ---- mckinley-03 ----

Failing path sdb on mckinley-01
Failing path sdj on mckinley-01
Failing path sdr on mckinley-01
Failing path sdz on mckinley-01
Failing path sdc on mckinley-02
Failing path sdk on mckinley-02
Failing path sds on mckinley-02
Failing path sdaa on mckinley-02
Failing path sdc on mckinley-03
Failing path sdk on mckinley-03
Failing path sds on mckinley-03
Failing path sdaa on mckinley-03

Attempting I/O to cause mirror down conversion(s) on mckinley-01
dd if=/dev/zero of=/mnt/syncd_secondary_3legs_1/ddfile count=10 bs=4M
10+0 records in
10+0 records out
41943040 bytes (42 MB) copied, 0.189207 s, 222 MB/s
Verifying current sanity of lvm after the failure

Current mirror/raid device structure(s):
  Couldn't find device with uuid CaiqAq-BQm4-dKYy-GcZO-N9w1-l0Bc-X8Tf0I.
  LV                                    Attr       LSize   Cpy%Sync Devices
   syncd_secondary_3legs_1               cwi-aom--- 500.00m 100.00   syncd_secondary_3legs_1_mimagetmp_3(0),syncd_secondary_3legs_1_mimage_3(0)
   [syncd_secondary_3legs_1_mimage_0]    iwi-aom--- 500.00m          /dev/mapper/mpathc1(0)
   [syncd_secondary_3legs_1_mimage_2]    iwi-aom--- 500.00m          /dev/mapper/mpathe1(0)
   [syncd_secondary_3legs_1_mimage_3]    iwi-aom--- 500.00m          /dev/mapper/mpathb1(0)
   [syncd_secondary_3legs_1_mimagetmp_3] mwi-aom--- 500.00m 100.00   syncd_secondary_3legs_1_mimage_0(0),syncd_secondary_3legs_1_mimage_2(0)   
   [syncd_secondary_3legs_1_mlog]        lwi-aom---   4.00m          /dev/mapper/mpathd1(0)

Verifying FAILED device /dev/mapper/mpatha1 is *NOT* in the volume(s)
Verifying LOG device(s) /dev/mapper/mpathd1 *ARE* in the mirror(s)
Verifying LEG device /dev/mapper/mpathc1 *IS* in the volume(s)
Verifying LEG device /dev/mapper/mpathe1 *IS* in the volume(s)
verify the dm devices associated with /dev/mapper/mpatha1 have been removed as expected
Checking REMOVAL of syncd_secondary_3legs_1_mimage_1 on:  mckinley-01 mckinley-02 mckinley-03
verify the newly allocated dm devices were added as a result of the failures
Checking EXISTENCE of syncd_secondary_3legs_1_mimage_3 on:  mckinley-01 mckinley-02 mckinley-03

Verify that the mirror image order remains the same after the down conversion
EXPECTED LEG ORDER: /dev/mapper/mpathc1 /dev/mapper/mpathe1 unknown
ACTUAL LEG ORDER: /dev/mapper/mpathc1 /dev/mapper/mpathe1 /dev/mapper/mpathb1
Verifying files (checkit) on mirror(s) on...
        ---- mckinley-01 ----
        ---- mckinley-02 ----
        ---- mckinley-03 ----

Enabling path sdb on mckinley-01
Enabling path sdj on mckinley-01
Enabling path sdr on mckinley-01
Enabling path sdz on mckinley-01
Enabling path sdc on mckinley-02
Enabling path sdk on mckinley-02
Enabling path sds on mckinley-02
Enabling path sdaa on mckinley-02
Enabling path sdc on mckinley-03
Enabling path sdk on mckinley-03
Enabling path sds on mckinley-03
Enabling path sdaa on mckinley-03

-------------------------------------------------------------------------------
Force a vgreduce to either clean up the corrupt additional LV or lack of PV MDA
-------------------------------------------------------------------------------
  Scan of VG helter_skelter from /dev/mapper/mpatha1 found metadata seqno 15 vs previous 23.
  Scan of VG helter_skelter from /dev/mapper/mpatha1 found metadata seqno 15 vs previous 23.
  WARNING: Inconsistent metadata found for VG helter_skelter - updating to use version 23
Recreating PVs /dev/mapper/mpatha1 and then extending back into helter_skelter
mckinley-03 pvcreate /dev/mapper/mpatha1
  Scan of VG helter_skelter from /dev/mapper/mpatha1 found metadata seqno 24 vs previous 25.
  Scan of VG helter_skelter from /dev/mapper/mpatha1 found metadata seqno 24 vs previous 25.
  Scan of VG helter_skelter from /dev/mapper/mpatha1 found metadata seqno 24 vs previous 25.
  WARNING: Inconsistent metadata found for VG helter_skelter - updating to use version 25
  WARNING: Removing PV /dev/mapper/mpatha1 (CaiqAq-BQm4-dKYy-GcZO-N9w1-l0Bc-X8Tf0I) that no longer belongs to VG helter_skelter
mckinley-03 vgextend helter_skelter /dev/mapper/mpatha1

Verify that each of the raid repairs finished successfully
Checking for leftover '-missing_0_0' or 'unknown devices'

Checking for PVs marked as missing (a-m)...
Checking for PVs marked as missing (a-m)...
Checking for PVs marked as missing (a-m)...
Waiting until all mirror|raid volumes become fully syncd...
   1/1 mirror(s) are fully synced: ( 100.00% )
Sleeping 15 sec

Verifying files (checkit) on mirror(s) on...
        ---- mckinley-01 ----
        ---- mckinley-02 ----
        ---- mckinley-03 ----

Stopping the io load (collie/xdoio) on mirror(s)
Unmounting gfs and removing mnt point on mckinley-01...
Unmounting gfs and removing mnt point on mckinley-02...
Unmounting gfs and removing mnt point on mckinley-03...

Deactivating and removing mirror(s)
Checking for left over mirror dm devices on
         ...mckinley-01 ...mckinley-02 ...mckinley-03

Comment 10 errata-xmlrpc 2018-10-30 12:22:03 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-2018:3344