Bug 1836803 - pvcreate should bypass lvmetad
Summary: pvcreate should bypass lvmetad
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: lvm2
Version: 7.8
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: David Teigland
QA Contact: cluster-qe@redhat.com
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-05-18 08:17 UTC by nikhil kshirsagar
Modified: 2021-09-03 12:56 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-08-13 18:40:59 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
patch (3.12 KB, patch)
2020-05-18 14:26 UTC, David Teigland
no flags Details | Diff

Description nikhil kshirsagar 2020-05-18 08:17:29 UTC
Description of problem:
Even with use_lvmetad=1 , pvcreate should bypass lvmetad, to catch and prevent issues arising out of incorrect cluster configurations where lvmetad is left enabled.

For example, on 7.6 we can see this bad cluster configuration allows adding the same storage to different volume groups on different servers.

#### RHEL 7.6 ####

CONCLUSION:
 I am able to add one PV in two diferent VG. No error reported on second cluster node when same device added in differnt VG.

TEST STEPS:

I will try to add mpathd in two different VGs keeping lvmetad enabled.

# CURRENT STATUS #

 - Current LVM device status (same on all cluster nodes):

[root@clust-node1 ~]# vgs -ao+UUID
  VG    #PV #LV #SN Attr   VSize    VFree  VG UUID                               
  myvg    1   1   0 wz--n- 1020.00m     0  Eizu7J-5aZy-abGp-9gPT-4XQB-Dgtg-eVlvhl
  myvg1   1   1   0 wz--n- 1020.00m     0  tOR9o3-xiys-ZGTY-kB26-MxqL-6r5Z-HVer8i
  rhel    1   2   0 wz--n-    9.51g 40.00m Kr5TIy-2aP9-7Mvd-jECQ-ihub-vABR-NmO1Ri
[root@clust-node1 ~]# lvs -ao+UUID
  LV    VG    Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert LV UUID                               
  mylv  myvg  -wi-ao---- 1020.00m                                                     amWg6N-kmJH-BU1Q-zbKK-1VoU-vFU6-Z2Tgge
  mylv1 myvg1 -wi------- 1020.00m                                                     0i4lMU-2fNk-hBbI-KSOj-NZAO-OUQW-xdf82B
  root  rhel  -wi-ao----    8.47g                                                     RBXRRO-Nk3l-IrhJ-sGe9-YWAI-rEIm-SjJEEj
  swap  rhel  -wi-ao----    1.00g                                                     tK33Dn-yK1m-hU3p-yzx1-Ap3S-TJCL-8TqITl
[root@clust-node1 ~]# pvs -o+UUID
  PV         VG    Fmt  Attr PSize    PFree  PV UUID                               
  /dev/sda2  rhel  lvm2 a--     9.51g 40.00m ROQByT-EHhx-z7Kv-dgmH-eDUe-DdX2-lRsUYs
  /dev/vda1  myvg  lvm2 a--  1020.00m     0  6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z
  /dev/vda2  myvg1 lvm2 a--  1020.00m     0  4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU
[root@clust-node1 ~]# 

[root@clust-node2 ~]# vgs -ao+UUID
  VG    #PV #LV #SN Attr   VSize    VFree  VG UUID                               
  myvg    1   1   0 wz--n- 1020.00m     0  Eizu7J-5aZy-abGp-9gPT-4XQB-Dgtg-eVlvhl
  myvg1   1   1   0 wz--n- 1020.00m     0  tOR9o3-xiys-ZGTY-kB26-MxqL-6r5Z-HVer8i
  rhel    1   2   0 wz--n-    9.51g 40.00m o4pIKX-cYFH-AKdF-q3R4-Qjay-Td3x-ZIxqo0
[root@clust-node2 ~]# lvs -ao+UUID
  LV    VG    Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert LV UUID                               
  mylv  myvg  -wi------- 1020.00m                                                     amWg6N-kmJH-BU1Q-zbKK-1VoU-vFU6-Z2Tgge
  mylv1 myvg1 -wi-ao---- 1020.00m                                                     0i4lMU-2fNk-hBbI-KSOj-NZAO-OUQW-xdf82B
  root  rhel  -wi-ao----    8.47g                                                     1fAIAP-XO8H-phK6-8cNY-rmw2-RExF-fHP9uU
  swap  rhel  -wi-ao----    1.00g                                                     0gWvr1-ZQnl-NoBb-EDVx-Wfli-jR5u-BVWwQM
[root@clust-node2 ~]# pvs -o+UUID
  PV         VG    Fmt  Attr PSize    PFree  PV UUID                               
  /dev/sda2  rhel  lvm2 a--     9.51g 40.00m hR0rLp-UbbA-1w1o-aGeW-Ymeh-nQsh-kIpKRZ
  /dev/vda1  myvg  lvm2 a--  1020.00m     0  6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z
  /dev/vda2  myvg1 lvm2 a--  1020.00m     0  4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU
[root@clust-node2 ~]# 


 - Multipath device status:

[root@clust-node1 ~]# multipath -ll
mpathd (3600140592086e2fe9d947b48c119409f) dm-2 LIO-ORG ,3node           
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  |- 15:0:0:0 sdd 8:48 active ready running
  `- 14:0:0:0 sdb 8:16 active ready running
mpathc (360014058285a0163e2843a1aad199e78) dm-3 LIO-ORG ,3node_gfs       
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  |- 15:0:0:1 sde 8:64 active ready running
  `- 14:0:0:1 sdc 8:32 active ready running
[root@clust-node1 ~]# 

[root@clust-node2 ~]# multipath -ll
mpathe (3600140592086e2fe9d947b48c119409f) dm-2 LIO-ORG ,3node           
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  |- 10:0:0:0 sdb 8:16 active ready running
  `- 11:0:0:0 sdc 8:32 active ready running
mpathc (360014058285a0163e2843a1aad199e78) dm-3 LIO-ORG ,3node_gfs       
size=1.0G features='0' hwhandler='0' wp=rw
`-+- policy='service-time 0' prio=1 status=active
  |- 10:0:0:1 sdd 8:48 active ready running
  `- 11:0:0:1 sde 8:64 active ready running
[root@clust-node2 ~]# 


 - lvmetad status:

[root@clust-node1 ~]# cat /etc/lvm/lvm.conf | egrep 'volume_list|use_lvmetad|filter|locking_type' | grep -v "#"
    locking_type = 1
    use_lvmetad = 1
volume_list = [ "rhel" ] 
[root@clust-node1 ~]# systemctl status lvm2-lvmetad
● lvm2-lvmetad.service - LVM2 metadata daemon
   Loaded: loaded (/usr/lib/systemd/system/lvm2-lvmetad.service; static; vendor preset: enabled)
   Active: active (running) since Mon 2020-05-04 13:01:03 IST; 17min ago
     Docs: man:lvmetad(8)
 Main PID: 568 (lvmetad)
    Tasks: 1
   CGroup: /system.slice/lvm2-lvmetad.service
           └─568 /usr/sbin/lvmetad -f

May 04 13:01:03 clust-node1 systemd[1]: Started LVM2 metadata daemon.
[root@clust-node1 ~]# 

[root@clust-node2 ~]# cat /etc/lvm/lvm.conf | egrep 'volume_list|use_lvmetad|filter|locking_type' | grep -v "#"
    locking_type = 1
    use_lvmetad = 1
	 volume_list = [ "rhel" ] 
[root@clust-node2 ~]# systemctl status lvm2-lvmetad
● lvm2-lvmetad.service - LVM2 metadata daemon
   Loaded: loaded (/usr/lib/systemd/system/lvm2-lvmetad.service; static; vendor preset: enabled)
   Active: active (running) since Mon 2020-05-04 13:01:04 IST; 17min ago
     Docs: man:lvmetad(8)
 Main PID: 566 (lvmetad)
    Tasks: 1
   CGroup: /system.slice/lvm2-lvmetad.service
           └─566 /usr/sbin/lvmetad -f

May 04 13:01:04 clust-node2 systemd[1]: Started LVM2 metadata daemon.
[root@clust-node2 ~]# 


 - Package version (same on all the cluster nodes):


device-mapper-multipath-0.4.9-123.el7.x86_64
device-mapper-multipath-libs-0.4.9-123.el7.x86_64
kernel-3.10.0-693.21.1.el7.x86_64
kernel-3.10.0-862.14.4.el7.x86_64
kernel-3.10.0-957.27.2.el7.x86_64
kernel-tools-3.10.0-957.27.2.el7.x86_64
kernel-tools-libs-3.10.0-957.27.2.el7.x86_64
lvm2-2.02.180-10.el7_6.8.x86_64
lvm2-cluster-2.02.180-10.el7_6.8.x86_64
lvm2-libs-2.02.180-10.el7_6.8.x86_64
[root@clust-node1 ~]# 


 ** Starting the test now to add mpathd in two separate VGs **


[root@clust-node1 ~]# pvcreate /dev/mapper/mpathd
  Physical volume "/dev/mapper/mpathd" successfully created.
[root@clust-node1 ~]# vgextend myvg /dev/mapper/mpathd
  Volume group "myvg" successfully extended
[root@clust-node1 ~]# lvextend myvg/mylv -l+100%FREE 
  Size of logical volume myvg/mylv changed from 1020.00 MiB (255 extents) to 1.99 GiB (510 extents).
  Logical volume myvg/mylv successfully resized.
[root@clust-node1 ~]# xfs_growfs /mnt/
meta-data=/dev/mapper/myvg-mylv  isize=512    agcount=4, agsize=65280 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=261120, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=855, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 261120 to 522240
[root@clust-node1 ~]# df -Th /dev/mapper/myvg-mylv
Filesystem            Type  Size  Used Avail Use% Mounted on
/dev/mapper/myvg-mylv xfs   2.0G   33M  2.0G   2% /mnt
[root@clust-node1 ~]# cd /mnt/
[root@clust-node1 mnt]# touch testing
[root@clust-node1 mnt]# 


 - Same device mpathe added in a different VGs:

[root@clust-node2 ~]# pvcreate /dev/mapper/mpathe
  Physical volume "/dev/mapper/mpathe" successfully created.
[root@clust-node2 ~]# vgextend myvg1 /dev/mapper/mpathe
  Volume group "myvg1" successfully extended
[root@clust-node2 ~]# lvextend myvg1/mylv1 -l+100%FREE
  Size of logical volume myvg1/mylv1 changed from 1020.00 MiB (255 extents) to 1.99 GiB (510 extents).
  Logical volume myvg1/mylv1 successfully resized.
[root@clust-node2 ~]# xfs_growfs /mnt/
meta-data=/dev/mapper/myvg1-mylv1 isize=512    agcount=4, agsize=65280 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=261120, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=855, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 261120 to 522240
[root@clust-node2 ~]# df -Th /dev/mapper/myvg1-mylv1 
Filesystem              Type  Size  Used Avail Use% Mounted on
/dev/mapper/myvg1-mylv1 xfs   2.0G   33M  2.0G   2% /mnt
[root@clust-node2 ~]# cd /mnt/
[root@clust-node2 mnt]# touch test
[root@clust-node2 mnt]# 


 - Output for 'pvscan --cache -vvv' from both nodes:

[root@clust-node1 ~]# pvscan --cache -vvv
        Parsing: pvscan --cache -vvv
        Recognised command pvscan_cache (id 107 / enum 88).
      devices/global_filter not found in config: defaulting to global_filter = [ "a|.*/|" ]
      global/lvmetad_update_wait_time not found in config: defaulting to 10
        /run/lvm/lvmetad.socket: Opening daemon socket to lvmetad for protocol lvmetad version 1.
        Sending daemon lvmetad: hello
        Successfully connected to lvmetad on fd 3.
        Sysfs filter initialised.
        Internal filter initialised.
        LVM type filter initialised.
        Usable device filter initialised.
        mpath filter initialised.
        Partitioned filter initialised.
        MD filter initialised.
        Composite filter initialised.
      devices/filter not found in config: defaulting to filter = [ "a|.*/|" ]
        Regex filter initialised.
        Usable device filter initialised.
        Composite filter initialised.
      devices/cache not found in config: defaulting to /etc/lvm/cache/.cache
        Persistent filter initialised.
        Composite filter initialised.
      metadata/record_lvs_history not found in config: defaulting to 0
        DEGRADED MODE. Incomplete RAID LVs will be processed.
        Processing command: pvscan --cache -vvv
        Command pid: 12607
        System ID: 
        O_DIRECT will be used
      File-based locking selected.
        Preparing SELinux context for /run/lock/lvm to system_u:object_r:lvm_lock_t:s0.
        Resetting SELinux context to default value.
      Locking /run/lock/lvm/P_global RB
        Preparing SELinux context for /run/lock/lvm/P_global to system_u:object_r:lvm_lock_t:s0.
        _do_flock /run/lock/lvm/P_global:aux WB
        _undo_flock /run/lock/lvm/P_global:aux
        _do_flock /run/lock/lvm/P_global RB
        Resetting SELinux context to default value.
    Scanning all devices.
        Sending lvmetad get_global_info
        Sending lvmetad token_update update in progress
    Scanning all devices to initialize lvmetad.
        Finding devices to scan
        Creating list of system devices.
        Found dev 8:0 /dev/sda - new.
        Found dev 8:0 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001 - new alias.
        Found dev 8:0 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0 - new alias.
        Found dev 8:1 /dev/sda1 - new.
        Found dev 8:1 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001-part1 - new alias.
        Found dev 8:1 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0-part1 - new alias.
        Found dev 8:1 /dev/disk/by-uuid/4b5a8149-f612-409d-82b7-95ba6342c6dc - new alias.
        Found dev 8:2 /dev/sda2 - new.
        Found dev 8:2 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001-part2 - new alias.
        Found dev 8:2 /dev/disk/by-id/lvm-pv-uuid-ROQByT-EHhx-z7Kv-dgmH-eDUe-DdX2-lRsUYs - new alias.
        Found dev 8:2 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0-part2 - new alias.
        Found dev 11:0 /dev/sr0 - new.
        Found dev 11:0 /dev/cdrom - new alias.
        Found dev 11:0 /dev/disk/by-id/ata-QEMU_DVD-ROM_QM00002 - new alias.
        Found dev 11:0 /dev/disk/by-path/pci-0000:00:01.1-ata-1.1 - new alias.
        Found dev 252:0 /dev/vda - new.
        Found dev 252:0 /dev/disk/by-path/pci-0000:00:09.0 - new alias.
        Found dev 252:0 /dev/disk/by-path/virtio-pci-0000:00:09.0 - new alias.
        Found dev 252:1 /dev/vda1 - new.
        Found dev 252:1 /dev/disk/by-id/lvm-pv-uuid-6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z - new alias.
        Found dev 252:1 /dev/disk/by-path/pci-0000:00:09.0-part1 - new alias.
        Found dev 252:1 /dev/disk/by-path/virtio-pci-0000:00:09.0-part1 - new alias.
        Found dev 252:2 /dev/vda2 - new.
        Found dev 252:2 /dev/disk/by-id/lvm-pv-uuid-4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU - new alias.
        Found dev 252:2 /dev/disk/by-path/pci-0000:00:09.0-part2 - new alias.
        Found dev 252:2 /dev/disk/by-path/virtio-pci-0000:00:09.0-part2 - new alias.
        Found dev 8:16 /dev/sdb - new.
        Found dev 8:16 /dev/disk/by-id/scsi-3600140592086e2fe9d947b48c119409f - new alias.
        Found dev 8:16 /dev/disk/by-id/wwn-0x600140592086e2fe9d947b48c119409f - new alias.
        Found dev 8:16 /dev/disk/by-path/ip-192.168.10.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-0 - new alias.
        Found dev 8:32 /dev/sdc - new.
        Found dev 8:32 /dev/disk/by-id/scsi-360014058285a0163e2843a1aad199e78 - new alias.
        Found dev 8:32 /dev/disk/by-id/wwn-0x60014058285a0163e2843a1aad199e78 - new alias.
        Found dev 8:32 /dev/disk/by-path/ip-192.168.10.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-1 - new alias.
        Found dev 8:48 /dev/sdd - new.
        Found dev 8:16 /dev/disk/by-id/scsi-3600140592086e2fe9d947b48c119409f - exists. 
        Found dev 8:16 /dev/disk/by-id/wwn-0x600140592086e2fe9d947b48c119409f - exists. 
        Found dev 8:48 /dev/disk/by-path/ip-192.168.20.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-0 - new alias.
        Found dev 8:64 /dev/sde - new.
        Found dev 8:32 /dev/disk/by-id/scsi-360014058285a0163e2843a1aad199e78 - exists. 
        Found dev 8:32 /dev/disk/by-id/wwn-0x60014058285a0163e2843a1aad199e78 - exists. 
        Found dev 8:64 /dev/disk/by-path/ip-192.168.20.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-1 - new alias.
        Found dev 253:0 /dev/dm-0 - new.
        Found dev 253:0 /dev/disk/by-id/dm-name-rhel-root - new alias.
        Found dev 253:0 /dev/disk/by-id/dm-uuid-LVM-Kr5TIy2aP97MvdjECQihubvABRNmO1RiRBXRRONk3lIrhJsGe9YWAIrEImSjJEEj - new alias.
        Found dev 253:0 /dev/disk/by-uuid/c09482f4-5c18-48b7-bf75-b76ff038d9c7 - new alias.
        Found dev 253:0 /dev/mapper/rhel-root - new alias.
        Found dev 253:0 /dev/rhel/root - new alias.
        Found dev 253:1 /dev/dm-1 - new.
        Found dev 253:1 /dev/disk/by-id/dm-name-rhel-swap - new alias.
        Found dev 253:1 /dev/disk/by-id/dm-uuid-LVM-Kr5TIy2aP97MvdjECQihubvABRNmO1RitK33DnyK1mhU3pyzx1Ap3STJCL8TqITl - new alias.
        Found dev 253:1 /dev/disk/by-uuid/1dd59421-cb9b-45e4-b1b2-95528326f7a2 - new alias.
        Found dev 253:1 /dev/mapper/rhel-swap - new alias.
        Found dev 253:1 /dev/rhel/swap - new alias.
        Found dev 253:2 /dev/dm-2 - new.
        Found dev 253:2 /dev/disk/by-id/dm-name-mpathd - new alias.
        Found dev 253:2 /dev/disk/by-id/dm-uuid-mpath-3600140592086e2fe9d947b48c119409f - new alias.
        Found dev 253:2 /dev/disk/by-id/lvm-pv-uuid-hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI - new alias.
        Found dev 253:2 /dev/mapper/mpathd - new alias.
        Found dev 253:3 /dev/dm-3 - new.
        Found dev 253:3 /dev/disk/by-id/dm-name-mpathc - new alias.
        Found dev 253:3 /dev/disk/by-id/dm-uuid-mpath-360014058285a0163e2843a1aad199e78 - new alias.
        Found dev 253:3 /dev/mapper/mpathc - new alias.
        Found dev 253:4 /dev/dm-4 - new.
        Found dev 253:4 /dev/disk/by-id/dm-name-myvg-mylv - new alias.
        Found dev 253:4 /dev/disk/by-id/dm-uuid-LVM-Eizu7J5aZyabGp9gPT4XQBDgtgeVlvhlamWg6NkmJHBU1QzbKK1VoUvFU6Z2Tgge - new alias.
        Found dev 253:4 /dev/disk/by-uuid/0cb4c830-280b-44d0-adc3-60ed3c929b6f - new alias.
        Found dev 253:4 /dev/mapper/myvg-mylv - new alias.
        Found dev 253:4 /dev/myvg/mylv - new alias.
        Opened /dev/sda RO O_DIRECT
      /dev/sda: size is 20971520 sectors
        Closed /dev/sda
        filter partitioned deferred /dev/sda
        filter md deferred /dev/sda
        filter caching good /dev/sda
        /dev/cdrom: Skipping: Unrecognised LVM device type 11
        Opened /dev/vda RO O_DIRECT
      /dev/vda: size is 4194304 sectors
        Closed /dev/vda
        filter partitioned deferred /dev/vda
        filter md deferred /dev/vda
        filter caching good /dev/vda
        dm version   [ opencount flush ]   [16384] (*1)
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/rhel/root RO O_DIRECT
      /dev/rhel/root: size is 17760256 sectors
        Closed /dev/rhel/root
        filter partitioned deferred /dev/rhel/root
        filter md deferred /dev/rhel/root
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/rhel/root
        Opened /dev/sda1 RO O_DIRECT
      /dev/sda1: size is 1024000 sectors
        Closed /dev/sda1
        /dev/sda1: Device is a partition, using primary device sda for mpath component detection
        filter partitioned deferred /dev/sda1
        filter md deferred /dev/sda1
        filter caching good /dev/sda1
        Opened /dev/vda1 RO O_DIRECT
      /dev/vda1: size is 2097152 sectors
        Closed /dev/vda1
        filter partitioned deferred /dev/vda1
        filter md deferred /dev/vda1
        filter caching good /dev/vda1
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/rhel/swap RO O_DIRECT
      /dev/rhel/swap: size is 2097152 sectors
        Closed /dev/rhel/swap
        filter partitioned deferred /dev/rhel/swap
        filter md deferred /dev/rhel/swap
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/rhel/swap
        Opened /dev/sda2 RO O_DIRECT
      /dev/sda2: size is 19945472 sectors
        Closed /dev/sda2
        /dev/sda2: Device is a partition, using primary device sda for mpath component detection
        filter partitioned deferred /dev/sda2
        filter md deferred /dev/sda2
        filter caching good /dev/sda2
        Opened /dev/vda2 RO O_DIRECT
      /dev/vda2: size is 2095104 sectors
        Closed /dev/vda2
        filter partitioned deferred /dev/vda2
        filter md deferred /dev/vda2
        filter caching good /dev/vda2
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/mapper/mpathd RO O_DIRECT
      /dev/mapper/mpathd: size is 2097152 sectors
        Closed /dev/mapper/mpathd
        filter partitioned deferred /dev/mapper/mpathd
        filter md deferred /dev/mapper/mpathd
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/mapper/mpathd
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/mapper/mpathc RO O_DIRECT
      /dev/mapper/mpathc: size is 2097152 sectors
        Closed /dev/mapper/mpathc
        filter partitioned deferred /dev/mapper/mpathc
        filter md deferred /dev/mapper/mpathc
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/mapper/mpathc
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/myvg/mylv RO O_DIRECT
      /dev/myvg/mylv: size is 4177920 sectors
        Closed /dev/myvg/mylv
        filter partitioned deferred /dev/myvg/mylv
        filter md deferred /dev/myvg/mylv
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/myvg/mylv
        Opened /dev/sdb RO O_DIRECT
      /dev/sdb: size is 2097152 sectors
        Closed /dev/sdb
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdb: Skipping mpath component device
        Opened /dev/sdc RO O_DIRECT
      /dev/sdc: size is 2097152 sectors
        Closed /dev/sdc
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sdc: Skipping mpath component device
        Opened /dev/sdd RO O_DIRECT
      /dev/sdd: size is 2097152 sectors
        Closed /dev/sdd
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdd: Skipping mpath component device
        Opened /dev/sde RO O_DIRECT
      /dev/sde: size is 2097152 sectors
        Closed /dev/sde
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sde: Skipping mpath component device
        Found 11 devices to scan
        Scanning 11 devices for VG info
        Scanning submitted 11 reads
        Processing data from device /dev/sda 8:0 fd 6 block 0x5597bc20c2a0
      /dev/sda: No lvm label detected
        Processing data from device /dev/vda 252:0 fd 7 block 0x5597bc20c2f0
      /dev/vda: No lvm label detected
        Processing data from device /dev/rhel/root 253:0 fd 8 block 0x5597bc20c340
      /dev/rhel/root: No lvm label detected
        Processing data from device /dev/sda1 8:1 fd 9 block 0x5597bc20c390
      /dev/sda1: No lvm label detected
        Processing data from device /dev/vda1 252:1 fd 10 block 0x5597bc20c3e0
      /dev/vda1: lvm2 label detected at sector 1
        lvmcache /dev/vda1: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/vda1: PV header extension version 2 found
        Reading mda header sector from /dev/vda1 at 4096
        Reading metadata summary from /dev/vda1 at 8192 size 1302 (+0)
        Found metadata summary on /dev/vda1 at 8192 size 1302 for VG myvg
        lvmcache has no info for vgname "myvg" with VGID Eizu7J5aZyabGp9gPT4XQBDgtgeVlvhl.
        lvmcache has no info for vgname "myvg".
        lvmcache /dev/vda1: now in VG myvg with 1 mda(s).
        lvmcache /dev/vda1: VG myvg: set VGID to Eizu7J5aZyabGp9gPT4XQBDgtgeVlvhl.
        lvmcache /dev/vda1: VG myvg: set seqno to 4
        lvmcache /dev/vda1: VG myvg: set mda_checksum to 77637ad4 mda_size to 1302
        lvmcache /dev/vda1: VG myvg: set creation host to clust-node1.
        Processing data from device /dev/rhel/swap 253:1 fd 11 block 0x5597bc20c430
      /dev/rhel/swap: No lvm label detected
        Processing data from device /dev/sda2 8:2 fd 12 block 0x5597bc20c480
      /dev/sda2: lvm2 label detected at sector 1
        lvmcache /dev/sda2: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/sda2: PV header extension version 1 found
        Reading mda header sector from /dev/sda2 at 4096
        Reading metadata summary from /dev/sda2 at 6656 size 1309 (+0)
        Found metadata summary on /dev/sda2 at 6656 size 1309 for VG rhel
        lvmcache has no info for vgname "rhel" with VGID Kr5TIy2aP97MvdjECQihubvABRNmO1Ri.
        lvmcache has no info for vgname "rhel".
        lvmcache /dev/sda2: now in VG rhel with 1 mda(s).
        lvmcache /dev/sda2: VG rhel: set VGID to Kr5TIy2aP97MvdjECQihubvABRNmO1Ri.
        lvmcache /dev/sda2: VG rhel: set seqno to 3
        lvmcache /dev/sda2: VG rhel: set mda_checksum to b875ec mda_size to 1309
        lvmcache /dev/sda2: VG rhel: set creation host to clust-node1.
        Processing data from device /dev/vda2 252:2 fd 13 block 0x5597bc20c4d0
      /dev/vda2: lvm2 label detected at sector 1
        lvmcache /dev/vda2: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/vda2: PV header extension version 2 found
        Reading mda header sector from /dev/vda2 at 4096
        Reading metadata summary from /dev/vda2 at 8192 size 1304 (+0)
        Found metadata summary on /dev/vda2 at 8192 size 1304 for VG myvg1
        lvmcache has no info for vgname "myvg1" with VGID tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i.
        lvmcache has no info for vgname "myvg1".
        lvmcache /dev/vda2: now in VG myvg1 with 1 mda(s).
        lvmcache /dev/vda2: VG myvg1: set VGID to tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i.
        lvmcache /dev/vda2: VG myvg1: set seqno to 4
        lvmcache /dev/vda2: VG myvg1: set mda_checksum to 3d1765aa mda_size to 1304
        lvmcache /dev/vda2: VG myvg1: set creation host to clust-node2.
        Processing data from device /dev/mapper/mpathd 253:2 fd 14 block 0x5597bc20c520
      /dev/mapper/mpathd: lvm2 label detected at sector 1
        lvmcache /dev/mapper/mpathd: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/mapper/mpathd: PV header extension version 2 found
        Reading mda header sector from /dev/mapper/mpathd at 4096
        Reading metadata summary from /dev/mapper/mpathd at 6144 size 1304 (+0)
        Skipped parsing metadata on /dev/mapper/mpathd
        Found metadata summary on /dev/mapper/mpathd at 6144 size 1304 for VG myvg1
        lvmcache /dev/mapper/mpathd: now in VG myvg1 (tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i) with 1 mda(s).
        Processing data from device /dev/mapper/mpathc 253:3 fd 15 block 0x5597bc20c570
      /dev/mapper/mpathc: No lvm label detected
        Processing data from device /dev/myvg/mylv 253:4 fd 16 block 0x5597bc20c5c0
      /dev/myvg/mylv: No lvm label detected
        Scanned devices: read errors 0 process errors 0 failed 0
        Telling lvmetad to clear its cache
      /dev/sda: using cached size 20971520 sectors
        /dev/sda: Skipping: Partition table signature found
        /dev/cdrom: Skipping: Unrecognised LVM device type 11
      /dev/vda: using cached size 4194304 sectors
        /dev/vda: Skipping: Partition table signature found
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
      /dev/rhel/root: using cached size 17760256 sectors
      /dev/rhel/root: using cached size 17760256 sectors
        Scan metadata from dev /dev/rhel/root
    No PV info found on /dev/rhel/root for PVID .
        Telling lvmetad to forget any PV on /dev/rhel/root
      Request to drop PV /dev/rhel/root in lvmetad did not find any matching object.
      /dev/sda1: using cached size 1024000 sectors
        /dev/sda1: Device is a partition, using primary device sda for mpath component detection
      /dev/sda1: using cached size 1024000 sectors
        Scan metadata from dev /dev/sda1
    No PV info found on /dev/sda1 for PVID .
        Telling lvmetad to forget any PV on /dev/sda1
      Request to drop PV /dev/sda1 in lvmetad did not find any matching object.
      /dev/vda1: using cached size 2097152 sectors
      /dev/vda1: using cached size 2097152 sectors
        Scan metadata from dev /dev/vda1
        Reading mda header sector from /dev/vda1 at 4096
        Reading metadata from /dev/vda1 at 8192 size 1302 (+0)
        Allocated VG myvg at 0x5597bc22bac0.
        No device with uuid hM2oHzBEbJ7XUVAfPfQdZg2NNqCvCYpI.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
        Importing logical volume myvg/mylv.
        Found metadata on /dev/vda1 at 8192 size 1302 for VG 
        Reading mda header sector from /dev/vda1 at 4096
        Telling lvmetad to store PV /dev/vda1 (6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z) in VG myvg
        Freeing VG myvg at 0x5597bc22bac0.
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
      /dev/rhel/swap: using cached size 2097152 sectors
      /dev/rhel/swap: using cached size 2097152 sectors
        Scan metadata from dev /dev/rhel/swap
    No PV info found on /dev/rhel/swap for PVID .
        Telling lvmetad to forget any PV on /dev/rhel/swap
      Request to drop PV /dev/rhel/swap in lvmetad did not find any matching object.
      /dev/sda2: using cached size 19945472 sectors
        /dev/sda2: Device is a partition, using primary device sda for mpath component detection
      /dev/sda2: using cached size 19945472 sectors
        Scan metadata from dev /dev/sda2
        Reading mda header sector from /dev/sda2 at 4096
        Reading metadata from /dev/sda2 at 6656 size 1309 (+0)
        Allocated VG rhel at 0x5597bc22bac0.
        Importing logical volume rhel/swap.
        Importing logical volume rhel/root.
        Found metadata on /dev/sda2 at 6656 size 1309 for VG 
        Reading mda header sector from /dev/sda2 at 4096
        Telling lvmetad to store PV /dev/sda2 (ROQByT-EHhx-z7Kv-dgmH-eDUe-DdX2-lRsUYs) in VG rhel
        Freeing VG rhel at 0x5597bc22bac0.
      /dev/vda2: using cached size 2095104 sectors
      /dev/vda2: using cached size 2095104 sectors
        Scan metadata from dev /dev/vda2
        Reading mda header sector from /dev/vda2 at 4096
        Reading metadata from /dev/vda2 at 8192 size 1304 (+0)
        Allocated VG myvg1 at 0x5597bc22bac0.
        Importing logical volume myvg1/mylv1.
        Found metadata on /dev/vda2 at 8192 size 1304 for VG 
        Reading mda header sector from /dev/vda2 at 4096
        Telling lvmetad to store PV /dev/vda2 (4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU) in VG myvg1
        Freeing VG myvg1 at 0x5597bc22bac0.
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
      /dev/mapper/mpathd: using cached size 2097152 sectors
      /dev/mapper/mpathd: using cached size 2097152 sectors
        Scan metadata from dev /dev/mapper/mpathd
        Reading mda header sector from /dev/mapper/mpathd at 4096
        Reading metadata from /dev/mapper/mpathd at 6144 size 1304 (+0)
        Allocated VG myvg1 at 0x5597bc22bac0.
        Importing logical volume myvg1/mylv1.
        Found metadata on /dev/mapper/mpathd at 6144 size 1304 for VG 
        Reading mda header sector from /dev/mapper/mpathd at 4096
        Telling lvmetad to store PV /dev/mapper/mpathd (VGodsg-02KE-jjtY-zuGT-yg6o-Lzbt-VcNiAV) in VG myvg1
        Freeing VG myvg1 at 0x5597bc22bac0.
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
      /dev/mapper/mpathc: using cached size 2097152 sectors
      /dev/mapper/mpathc: using cached size 2097152 sectors
        Scan metadata from dev /dev/mapper/mpathc
    No PV info found on /dev/mapper/mpathc for PVID .
        Telling lvmetad to forget any PV on /dev/mapper/mpathc
      Request to drop PV /dev/mapper/mpathc in lvmetad did not find any matching object.
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
      /dev/myvg/mylv: using cached size 4177920 sectors
      /dev/myvg/mylv: using cached size 4177920 sectors
        Scan metadata from dev /dev/myvg/mylv
    No PV info found on /dev/myvg/mylv for PVID .
        Telling lvmetad to forget any PV on /dev/myvg/mylv
      Request to drop PV /dev/myvg/mylv in lvmetad did not find any matching object.
      /dev/sdb: using cached size 2097152 sectors
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdb: Skipping mpath component device
      /dev/sdc: using cached size 2097152 sectors
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sdc: Skipping mpath component device
      /dev/sdd: using cached size 2097152 sectors
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdd: Skipping mpath component device
      /dev/sde: using cached size 2097152 sectors
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sde: Skipping mpath component device
        Sending lvmetad token_update filter:3239235440
        Unlock: Memlock counters: prioritized:0 locked:0 critical:0 daemon:0 suspended:0
        Syncing device names
      Unlocking /run/lock/lvm/P_global
        _undo_flock /run/lock/lvm/P_global
      global/notify_dbus not found in config: defaulting to 1
        Dropping VG info
        lvmcache has no info for vgname "#orphans_lvm1" with VGID #orphans_lvm1.
        lvmcache has no info for vgname "#orphans_lvm1".
        lvmcache: Initialised VG #orphans_lvm1.
        lvmcache has no info for vgname "#orphans_pool" with VGID #orphans_pool.
        lvmcache has no info for vgname "#orphans_pool".
        lvmcache: Initialised VG #orphans_pool.
        lvmcache has no info for vgname "#orphans_lvm2" with VGID #orphans_lvm2.
        lvmcache has no info for vgname "#orphans_lvm2".
        lvmcache: Initialised VG #orphans_lvm2.
        Completed: pvscan --cache -vvv
[root@clust-node1 ~]# 


[root@clust-node2 ~]# pvscan --cache -vvv
        Parsing: pvscan --cache -vvv
        Recognised command pvscan_cache (id 107 / enum 88).
      devices/global_filter not found in config: defaulting to global_filter = [ "a|.*/|" ]
      global/lvmetad_update_wait_time not found in config: defaulting to 10
        /run/lvm/lvmetad.socket: Opening daemon socket to lvmetad for protocol lvmetad version 1.
        Sending daemon lvmetad: hello
        Successfully connected to lvmetad on fd 3.
        Sysfs filter initialised.
        Internal filter initialised.
        LVM type filter initialised.
        Usable device filter initialised.
        mpath filter initialised.
        Partitioned filter initialised.
        MD filter initialised.
        Composite filter initialised.
      devices/filter not found in config: defaulting to filter = [ "a|.*/|" ]
        Regex filter initialised.
        Usable device filter initialised.
        Composite filter initialised.
      devices/cache not found in config: defaulting to /etc/lvm/cache/.cache
        Persistent filter initialised.
        Composite filter initialised.
      metadata/record_lvs_history not found in config: defaulting to 0
        DEGRADED MODE. Incomplete RAID LVs will be processed.
        Processing command: pvscan --cache -vvv
        Command pid: 12518
        System ID: 
        O_DIRECT will be used
      File-based locking selected.
        Preparing SELinux context for /run/lock/lvm to system_u:object_r:lvm_lock_t:s0.
        Resetting SELinux context to default value.
      Locking /run/lock/lvm/P_global RB
        Preparing SELinux context for /run/lock/lvm/P_global to system_u:object_r:lvm_lock_t:s0.
        _do_flock /run/lock/lvm/P_global:aux WB
        _undo_flock /run/lock/lvm/P_global:aux
        _do_flock /run/lock/lvm/P_global RB
        Resetting SELinux context to default value.
    Scanning all devices.
        Sending lvmetad get_global_info
        Sending lvmetad token_update update in progress
    Scanning all devices to initialize lvmetad.
        Finding devices to scan
        Creating list of system devices.
        Found dev 8:0 /dev/sda - new.
        Found dev 8:0 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001 - new alias.
        Found dev 8:0 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0 - new alias.
        Found dev 8:1 /dev/sda1 - new.
        Found dev 8:1 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001-part1 - new alias.
        Found dev 8:1 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0-part1 - new alias.
        Found dev 8:1 /dev/disk/by-uuid/98f70f9a-f2e9-4b0a-9a01-ba8b425a61ea - new alias.
        Found dev 8:2 /dev/sda2 - new.
        Found dev 8:2 /dev/disk/by-id/ata-QEMU_HARDDISK_QM00001-part2 - new alias.
        Found dev 8:2 /dev/disk/by-id/lvm-pv-uuid-hR0rLp-UbbA-1w1o-aGeW-Ymeh-nQsh-kIpKRZ - new alias.
        Found dev 8:2 /dev/disk/by-path/pci-0000:00:01.1-ata-1.0-part2 - new alias.
        Found dev 11:0 /dev/sr0 - new.
        Found dev 11:0 /dev/cdrom - new alias.
        Found dev 11:0 /dev/disk/by-id/ata-QEMU_DVD-ROM_QM00002 - new alias.
        Found dev 11:0 /dev/disk/by-path/pci-0000:00:01.1-ata-1.1 - new alias.
        Found dev 252:0 /dev/vda - new.
        Found dev 252:0 /dev/disk/by-path/pci-0000:00:09.0 - new alias.
        Found dev 252:0 /dev/disk/by-path/virtio-pci-0000:00:09.0 - new alias.
        Found dev 252:1 /dev/vda1 - new.
        Found dev 252:1 /dev/disk/by-id/lvm-pv-uuid-krcz6N-DguQ-Ijci-NGXu-VReM-7Qws-4GP1Wy - new alias.
        Found dev 252:1 /dev/disk/by-path/pci-0000:00:09.0-part1 - new alias.
        Found dev 252:1 /dev/disk/by-path/virtio-pci-0000:00:09.0-part1 - new alias.
        Found dev 252:2 /dev/vda2 - new.
        Found dev 252:2 /dev/disk/by-id/lvm-pv-uuid-4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU - new alias.
        Found dev 252:2 /dev/disk/by-path/pci-0000:00:09.0-part2 - new alias.
        Found dev 252:2 /dev/disk/by-path/virtio-pci-0000:00:09.0-part2 - new alias.
        Found dev 8:16 /dev/sdb - new.
        Found dev 8:32 /dev/disk/by-id/scsi-3600140592086e2fe9d947b48c119409f - new.
        Found dev 8:32 /dev/disk/by-id/wwn-0x600140592086e2fe9d947b48c119409f - new alias.
        Found dev 8:16 /dev/disk/by-path/ip-192.168.10.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-0 - new alias.
        Found dev 8:48 /dev/sdd - new.
        Found dev 8:64 /dev/disk/by-id/scsi-360014058285a0163e2843a1aad199e78 - new.
        Found dev 8:64 /dev/disk/by-id/wwn-0x60014058285a0163e2843a1aad199e78 - new alias.
        Found dev 8:48 /dev/disk/by-path/ip-192.168.10.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-1 - new alias.
        Found dev 8:32 /dev/sdc - new alias.
        Found dev 8:32 /dev/disk/by-id/scsi-3600140592086e2fe9d947b48c119409f - exists. 
        Found dev 8:32 /dev/disk/by-id/wwn-0x600140592086e2fe9d947b48c119409f - exists. 
        Found dev 8:32 /dev/disk/by-path/ip-192.168.20.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-0 - new alias.
        Found dev 8:64 /dev/sde - new alias.
        Found dev 8:64 /dev/disk/by-id/scsi-360014058285a0163e2843a1aad199e78 - exists. 
        Found dev 8:64 /dev/disk/by-id/wwn-0x60014058285a0163e2843a1aad199e78 - exists. 
        Found dev 8:64 /dev/disk/by-path/ip-192.168.20.80:3260-iscsi-iqn.2018-07.csb.pnq:3node-lun-1 - new alias.
        Found dev 253:0 /dev/dm-0 - new.
        Found dev 253:0 /dev/disk/by-id/dm-name-rhel-root - new alias.
        Found dev 253:0 /dev/disk/by-id/dm-uuid-LVM-o4pIKXcYFHAKdFq3R4QjayTd3xZIxqo01fAIAPXO8HphK68cNYrmw2RExFfHP9uU - new alias.
        Found dev 253:0 /dev/disk/by-uuid/8e56a825-cf77-42ba-97c0-2ff2bbcfe61d - new alias.
        Found dev 253:0 /dev/mapper/rhel-root - new alias.
        Found dev 253:0 /dev/rhel/root - new alias.
        Found dev 253:1 /dev/dm-1 - new.
        Found dev 253:1 /dev/disk/by-id/dm-name-rhel-swap - new alias.
        Found dev 253:1 /dev/disk/by-id/dm-uuid-LVM-o4pIKXcYFHAKdFq3R4QjayTd3xZIxqo00gWvr1ZQnlNoBbEDVxWflijR5uBVWwQM - new alias.
        Found dev 253:1 /dev/disk/by-uuid/86d66daa-d985-4e7a-9403-37e4b7aded39 - new alias.
        Found dev 253:1 /dev/mapper/rhel-swap - new alias.
        Found dev 253:1 /dev/rhel/swap - new alias.
        Found dev 253:2 /dev/dm-2 - new.
        Found dev 253:2 /dev/disk/by-id/dm-name-mpathe - new alias.
        Found dev 253:2 /dev/disk/by-id/dm-uuid-mpath-3600140592086e2fe9d947b48c119409f - new alias.
        Found dev 253:2 /dev/disk/by-id/lvm-pv-uuid-VGodsg-02KE-jjtY-zuGT-yg6o-Lzbt-VcNiAV - new alias.
        Found dev 253:2 /dev/mapper/mpathe - new alias.
        Found dev 253:3 /dev/dm-3 - new.
        Found dev 253:3 /dev/disk/by-id/dm-name-mpathc - new alias.
        Found dev 253:3 /dev/disk/by-id/dm-uuid-mpath-360014058285a0163e2843a1aad199e78 - new alias.
        Found dev 253:3 /dev/mapper/mpathc - new alias.
        Found dev 253:4 /dev/dm-4 - new.
        Found dev 253:4 /dev/disk/by-id/dm-name-myvg1-mylv1 - new alias.
        Found dev 253:4 /dev/disk/by-id/dm-uuid-LVM-tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i0i4lMU2fNkhBbIKSOjNZAOOUQWxdf82B - new alias.
        Found dev 253:4 /dev/disk/by-uuid/dc91b89e-9b7c-4330-91ea-6bc33243dc57 - new alias.
        Found dev 253:4 /dev/mapper/myvg1-mylv1 - new alias.
        Found dev 253:4 /dev/myvg1/mylv1 - new alias.
        Opened /dev/sda RO O_DIRECT
      /dev/sda: size is 20971520 sectors
        Closed /dev/sda
        filter partitioned deferred /dev/sda
        filter md deferred /dev/sda
        filter caching good /dev/sda
        /dev/cdrom: Skipping: Unrecognised LVM device type 11
        Opened /dev/vda RO O_DIRECT
      /dev/vda: size is 4194304 sectors
        Closed /dev/vda
        filter partitioned deferred /dev/vda
        filter md deferred /dev/vda
        filter caching good /dev/vda
        dm version   [ opencount flush ]   [16384] (*1)
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/rhel/root RO O_DIRECT
      /dev/rhel/root: size is 17760256 sectors
        Closed /dev/rhel/root
        filter partitioned deferred /dev/rhel/root
        filter md deferred /dev/rhel/root
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/rhel/root
        Opened /dev/sda1 RO O_DIRECT
      /dev/sda1: size is 1024000 sectors
        Closed /dev/sda1
        /dev/sda1: Device is a partition, using primary device sda for mpath component detection
        filter partitioned deferred /dev/sda1
        filter md deferred /dev/sda1
        filter caching good /dev/sda1
        Opened /dev/vda1 RO O_DIRECT
      /dev/vda1: size is 2097152 sectors
        Closed /dev/vda1
        filter partitioned deferred /dev/vda1
        filter md deferred /dev/vda1
        filter caching good /dev/vda1
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/rhel/swap RO O_DIRECT
      /dev/rhel/swap: size is 2097152 sectors
        Closed /dev/rhel/swap
        filter partitioned deferred /dev/rhel/swap
        filter md deferred /dev/rhel/swap
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/rhel/swap
        Opened /dev/sda2 RO O_DIRECT
      /dev/sda2: size is 19945472 sectors
        Closed /dev/sda2
        /dev/sda2: Device is a partition, using primary device sda for mpath component detection
        filter partitioned deferred /dev/sda2
        filter md deferred /dev/sda2
        filter caching good /dev/sda2
        Opened /dev/vda2 RO O_DIRECT
      /dev/vda2: size is 2095104 sectors
        Closed /dev/vda2
        filter partitioned deferred /dev/vda2
        filter md deferred /dev/vda2
        filter caching good /dev/vda2
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/mapper/mpathe RO O_DIRECT
      /dev/mapper/mpathe: size is 2097152 sectors
        Closed /dev/mapper/mpathe
        filter partitioned deferred /dev/mapper/mpathe
        filter md deferred /dev/mapper/mpathe
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/mapper/mpathe
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/mapper/mpathc RO O_DIRECT
      /dev/mapper/mpathc: size is 2097152 sectors
        Closed /dev/mapper/mpathc
        filter partitioned deferred /dev/mapper/mpathc
        filter md deferred /dev/mapper/mpathc
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/mapper/mpathc
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
        Opened /dev/myvg1/mylv1 RO O_DIRECT
      /dev/myvg1/mylv1: size is 4177920 sectors
        Closed /dev/myvg1/mylv1
        filter partitioned deferred /dev/myvg1/mylv1
        filter md deferred /dev/myvg1/mylv1
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
        filter caching good /dev/myvg1/mylv1
        Opened /dev/sdb RO O_DIRECT
      /dev/sdb: size is 2097152 sectors
        Closed /dev/sdb
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdb: Skipping mpath component device
        Opened /dev/sdc RO O_DIRECT
      /dev/sdc: size is 2097152 sectors
        Closed /dev/sdc
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdc: Skipping mpath component device
        Opened /dev/sdd RO O_DIRECT
      /dev/sdd: size is 2097152 sectors
        Closed /dev/sdd
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sdd: Skipping mpath component device
        Opened /dev/sde RO O_DIRECT
      /dev/sde: size is 2097152 sectors
        Closed /dev/sde
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sde: Skipping mpath component device
        Found 11 devices to scan
        Scanning 11 devices for VG info
        Scanning submitted 11 reads
        Processing data from device /dev/sda 8:0 fd 6 block 0x55e1a33cc280
      /dev/sda: No lvm label detected
        Processing data from device /dev/vda 252:0 fd 7 block 0x55e1a33cc2d0
      /dev/vda: No lvm label detected
        Processing data from device /dev/rhel/root 253:0 fd 8 block 0x55e1a33cc320
      /dev/rhel/root: No lvm label detected
        Processing data from device /dev/sda1 8:1 fd 9 block 0x55e1a33cc370
      /dev/sda1: No lvm label detected
        Processing data from device /dev/vda1 252:1 fd 10 block 0x55e1a33cc3c0
      /dev/vda1: lvm2 label detected at sector 1
        lvmcache /dev/vda1: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/vda1: PV header extension version 2 found
        Reading mda header sector from /dev/vda1 at 4096
        Reading metadata summary from /dev/vda1 at 8192 size 1302 (+0)
        Found metadata summary on /dev/vda1 at 8192 size 1302 for VG myvg
        lvmcache has no info for vgname "myvg" with VGID Eizu7J5aZyabGp9gPT4XQBDgtgeVlvhl.
        lvmcache has no info for vgname "myvg".
        lvmcache /dev/vda1: now in VG myvg with 1 mda(s).
        lvmcache /dev/vda1: VG myvg: set VGID to Eizu7J5aZyabGp9gPT4XQBDgtgeVlvhl.
        lvmcache /dev/vda1: VG myvg: set seqno to 4
        lvmcache /dev/vda1: VG myvg: set mda_checksum to 77637ad4 mda_size to 1302
        lvmcache /dev/vda1: VG myvg: set creation host to clust-node1.
        Processing data from device /dev/rhel/swap 253:1 fd 11 block 0x55e1a33cc410
      /dev/rhel/swap: No lvm label detected
        Processing data from device /dev/sda2 8:2 fd 12 block 0x55e1a33cc460
      /dev/sda2: lvm2 label detected at sector 1
        lvmcache /dev/sda2: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/sda2: PV header extension version 1 found
        Reading mda header sector from /dev/sda2 at 4096
        Reading metadata summary from /dev/sda2 at 8192 size 1309 (+0)
        Found metadata summary on /dev/sda2 at 8192 size 1309 for VG rhel
        lvmcache has no info for vgname "rhel" with VGID o4pIKXcYFHAKdFq3R4QjayTd3xZIxqo0.
        lvmcache has no info for vgname "rhel".
        lvmcache /dev/sda2: now in VG rhel with 1 mda(s).
        lvmcache /dev/sda2: VG rhel: set VGID to o4pIKXcYFHAKdFq3R4QjayTd3xZIxqo0.
        lvmcache /dev/sda2: VG rhel: set seqno to 4
        lvmcache /dev/sda2: VG rhel: set mda_checksum to 9f361bc1 mda_size to 1309
        lvmcache /dev/sda2: VG rhel: set creation host to clust-node2.
        Processing data from device /dev/vda2 252:2 fd 13 block 0x55e1a33cc4b0
      /dev/vda2: lvm2 label detected at sector 1
        lvmcache /dev/vda2: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/vda2: PV header extension version 2 found
        Reading mda header sector from /dev/vda2 at 4096
        Reading metadata summary from /dev/vda2 at 8192 size 1304 (+0)
        Found metadata summary on /dev/vda2 at 8192 size 1304 for VG myvg1
        lvmcache has no info for vgname "myvg1" with VGID tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i.
        lvmcache has no info for vgname "myvg1".
        lvmcache /dev/vda2: now in VG myvg1 with 1 mda(s).
        lvmcache /dev/vda2: VG myvg1: set VGID to tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i.
        lvmcache /dev/vda2: VG myvg1: set seqno to 4
        lvmcache /dev/vda2: VG myvg1: set mda_checksum to 3d1765aa mda_size to 1304
        lvmcache /dev/vda2: VG myvg1: set creation host to clust-node2.
        Processing data from device /dev/mapper/mpathe 253:2 fd 14 block 0x55e1a33cc500
      /dev/mapper/mpathe: lvm2 label detected at sector 1
        lvmcache /dev/mapper/mpathe: now in VG #orphans_lvm2 (#orphans_lvm2) with 0 mda(s).
        /dev/mapper/mpathe: PV header extension version 2 found
        Reading mda header sector from /dev/mapper/mpathe at 4096
        Reading metadata summary from /dev/mapper/mpathe at 6144 size 1304 (+0)
        Skipped parsing metadata on /dev/mapper/mpathe
        Found metadata summary on /dev/mapper/mpathe at 6144 size 1304 for VG myvg1
        lvmcache /dev/mapper/mpathe: now in VG myvg1 (tOR9o3xiysZGTYkB26MxqL6r5ZHVer8i) with 1 mda(s).
        Processing data from device /dev/mapper/mpathc 253:3 fd 15 block 0x55e1a33cc550
      /dev/mapper/mpathc: No lvm label detected
        Processing data from device /dev/myvg1/mylv1 253:4 fd 16 block 0x55e1a33cc5a0
      /dev/myvg1/mylv1: No lvm label detected
        Scanned devices: read errors 0 process errors 0 failed 0
        Telling lvmetad to clear its cache
      /dev/sda: using cached size 20971520 sectors
        /dev/sda: Skipping: Partition table signature found
        /dev/cdrom: Skipping: Unrecognised LVM device type 11
      /dev/vda: using cached size 4194304 sectors
        /dev/vda: Skipping: Partition table signature found
        dm status   (253:0) [ noopencount noflush ]   [16384] (*1)
      /dev/rhel/root: using cached size 17760256 sectors
      /dev/rhel/root: using cached size 17760256 sectors
        Scan metadata from dev /dev/rhel/root
    No PV info found on /dev/rhel/root for PVID .
        Telling lvmetad to forget any PV on /dev/rhel/root
      Request to drop PV /dev/rhel/root in lvmetad did not find any matching object.
      /dev/sda1: using cached size 1024000 sectors
        /dev/sda1: Device is a partition, using primary device sda for mpath component detection
      /dev/sda1: using cached size 1024000 sectors
        Scan metadata from dev /dev/sda1
    No PV info found on /dev/sda1 for PVID .
        Telling lvmetad to forget any PV on /dev/sda1
      Request to drop PV /dev/sda1 in lvmetad did not find any matching object.
      /dev/vda1: using cached size 2097152 sectors
      /dev/vda1: using cached size 2097152 sectors
        Scan metadata from dev /dev/vda1
        Reading mda header sector from /dev/vda1 at 4096
        Reading metadata from /dev/vda1 at 8192 size 1302 (+0)
        Allocated VG myvg at 0x55e1a33ebac0.
        No device with uuid hM2oHzBEbJ7XUVAfPfQdZg2NNqCvCYpI.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
        Importing logical volume myvg/mylv.
        Found metadata on /dev/vda1 at 8192 size 1302 for VG 
        Reading mda header sector from /dev/vda1 at 4096
        Telling lvmetad to store PV /dev/vda1 (6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z) in VG myvg
        Freeing VG myvg at 0x55e1a33ebac0.
        dm status   (253:1) [ noopencount noflush ]   [16384] (*1)
      /dev/rhel/swap: using cached size 2097152 sectors
      /dev/rhel/swap: using cached size 2097152 sectors
        Scan metadata from dev /dev/rhel/swap
    No PV info found on /dev/rhel/swap for PVID .
        Telling lvmetad to forget any PV on /dev/rhel/swap
      Request to drop PV /dev/rhel/swap in lvmetad did not find any matching object.
      /dev/sda2: using cached size 19945472 sectors
        /dev/sda2: Device is a partition, using primary device sda for mpath component detection
      /dev/sda2: using cached size 19945472 sectors
        Scan metadata from dev /dev/sda2
        Reading mda header sector from /dev/sda2 at 4096
        Reading metadata from /dev/sda2 at 8192 size 1309 (+0)
        Allocated VG rhel at 0x55e1a33ebac0.
        Importing logical volume rhel/swap.
        Importing logical volume rhel/root.
        Found metadata on /dev/sda2 at 8192 size 1309 for VG 
        Reading mda header sector from /dev/sda2 at 4096
        Telling lvmetad to store PV /dev/sda2 (hR0rLp-UbbA-1w1o-aGeW-Ymeh-nQsh-kIpKRZ) in VG rhel
        Freeing VG rhel at 0x55e1a33ebac0.
      /dev/vda2: using cached size 2095104 sectors
      /dev/vda2: using cached size 2095104 sectors
        Scan metadata from dev /dev/vda2
        Reading mda header sector from /dev/vda2 at 4096
        Reading metadata from /dev/vda2 at 8192 size 1304 (+0)
        Allocated VG myvg1 at 0x55e1a33ec2c0.
        Importing logical volume myvg1/mylv1.
        Found metadata on /dev/vda2 at 8192 size 1304 for VG 
        Reading mda header sector from /dev/vda2 at 4096
        Telling lvmetad to store PV /dev/vda2 (4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU) in VG myvg1
        Freeing VG myvg1 at 0x55e1a33ec2c0.
        dm status   (253:2) [ noopencount noflush ]   [16384] (*1)
      /dev/mapper/mpathe: using cached size 2097152 sectors
      /dev/mapper/mpathe: using cached size 2097152 sectors
        Scan metadata from dev /dev/mapper/mpathe
        Reading mda header sector from /dev/mapper/mpathe at 4096
        Reading metadata from /dev/mapper/mpathe at 6144 size 1304 (+0)
        Allocated VG myvg1 at 0x55e1a33ebac0.
        Importing logical volume myvg1/mylv1.
        Found metadata on /dev/mapper/mpathe at 6144 size 1304 for VG 
        Reading mda header sector from /dev/mapper/mpathe at 4096
        Telling lvmetad to store PV /dev/mapper/mpathe (VGodsg-02KE-jjtY-zuGT-yg6o-Lzbt-VcNiAV) in VG myvg1
        Freeing VG myvg1 at 0x55e1a33ebac0.
        dm status   (253:3) [ noopencount noflush ]   [16384] (*1)
      /dev/mapper/mpathc: using cached size 2097152 sectors
      /dev/mapper/mpathc: using cached size 2097152 sectors
        Scan metadata from dev /dev/mapper/mpathc
    No PV info found on /dev/mapper/mpathc for PVID .
        Telling lvmetad to forget any PV on /dev/mapper/mpathc
      Request to drop PV /dev/mapper/mpathc in lvmetad did not find any matching object.
        dm status   (253:4) [ noopencount noflush ]   [16384] (*1)
      /dev/myvg1/mylv1: using cached size 4177920 sectors
      /dev/myvg1/mylv1: using cached size 4177920 sectors
        Scan metadata from dev /dev/myvg1/mylv1
    No PV info found on /dev/myvg1/mylv1 for PVID .
        Telling lvmetad to forget any PV on /dev/myvg1/mylv1
      Request to drop PV /dev/myvg1/mylv1 in lvmetad did not find any matching object.
      /dev/sdb: using cached size 2097152 sectors
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdb: Skipping mpath component device
      /dev/sdc: using cached size 2097152 sectors
        dm status   (253:2) [ opencount flush ]   [16384] (*1)
        /dev/sdc: Skipping mpath component device
      /dev/sdd: using cached size 2097152 sectors
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sdd: Skipping mpath component device
      /dev/sde: using cached size 2097152 sectors
        dm status   (253:3) [ opencount flush ]   [16384] (*1)
        /dev/sde: Skipping mpath component device
        Sending lvmetad token_update filter:3239235440
        Unlock: Memlock counters: prioritized:0 locked:0 critical:0 daemon:0 suspended:0
        Syncing device names
      Unlocking /run/lock/lvm/P_global
        _undo_flock /run/lock/lvm/P_global
      global/notify_dbus not found in config: defaulting to 1
        Dropping VG info
        lvmcache has no info for vgname "#orphans_lvm1" with VGID #orphans_lvm1.
        lvmcache has no info for vgname "#orphans_lvm1".
        lvmcache: Initialised VG #orphans_lvm1.
        lvmcache has no info for vgname "#orphans_pool" with VGID #orphans_pool.
        lvmcache has no info for vgname "#orphans_pool".
        lvmcache: Initialised VG #orphans_pool.
        lvmcache has no info for vgname "#orphans_lvm2" with VGID #orphans_lvm2.
        lvmcache has no info for vgname "#orphans_lvm2".
        lvmcache: Initialised VG #orphans_lvm2.
        Completed: pvscan --cache -vvv
[root@clust-node2 ~]# 





[root@clust-node1 ~]# vgs -ao+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  WARNING: Couldn't find all devices for LV myvg/mylv while checking used and assumed devices.
  VG    #PV #LV #SN Attr   VSize VFree  VG UUID                               
  myvg    2   1   0 wz-pn- 1.99g     0  Eizu7J-5aZy-abGp-9gPT-4XQB-Dgtg-eVlvhl
  myvg1   2   1   0 wz--n- 1.99g     0  tOR9o3-xiys-ZGTY-kB26-MxqL-6r5Z-HVer8i
  rhel    1   2   0 wz--n- 9.51g 40.00m Kr5TIy-2aP9-7Mvd-jECQ-ihub-vABR-NmO1Ri
[root@clust-node1 ~]# lvs -ao+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  WARNING: Couldn't find all devices for LV myvg/mylv while checking used and assumed devices.
  LV    VG    Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert LV UUID                               
  mylv  myvg  -wi-ao--p- 1.99g                                                     amWg6N-kmJH-BU1Q-zbKK-1VoU-vFU6-Z2Tgge
  mylv1 myvg1 -wi------- 1.99g                                                     0i4lMU-2fNk-hBbI-KSOj-NZAO-OUQW-xdf82B
  root  rhel  -wi-ao---- 8.47g                                                     RBXRRO-Nk3l-IrhJ-sGe9-YWAI-rEIm-SjJEEj
  swap  rhel  -wi-ao---- 1.00g                                                     tK33Dn-yK1m-hU3p-yzx1-Ap3S-TJCL-8TqITl
[root@clust-node1 ~]# pvs -o+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  WARNING: Couldn't find all devices for LV myvg/mylv while checking used and assumed devices.
  PV                 VG    Fmt  Attr PSize    PFree  PV UUID                               
  /dev/mapper/mpathd myvg1 lvm2 a--  1020.00m     0  VGodsg-02KE-jjtY-zuGT-yg6o-Lzbt-VcNiAV
  /dev/sda2          rhel  lvm2 a--     9.51g 40.00m ROQByT-EHhx-z7Kv-dgmH-eDUe-DdX2-lRsUYs
  /dev/vda1          myvg  lvm2 a--  1020.00m     0  6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z
  /dev/vda2          myvg1 lvm2 a--  1020.00m     0  4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU
  [unknown]          myvg  lvm2 a-m  1020.00m     0  hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI
[root@clust-node1 ~]# 





[root@clust-node2 ~]# vgs -ao+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  VG    #PV #LV #SN Attr   VSize VFree  VG UUID                               
  myvg    2   1   0 wz-pn- 1.99g     0  Eizu7J-5aZy-abGp-9gPT-4XQB-Dgtg-eVlvhl
  myvg1   2   1   0 wz--n- 1.99g     0  tOR9o3-xiys-ZGTY-kB26-MxqL-6r5Z-HVer8i
  rhel    1   2   0 wz--n- 9.51g 40.00m o4pIKX-cYFH-AKdF-q3R4-Qjay-Td3x-ZIxqo0
[root@clust-node2 ~]# lvs -ao+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  LV    VG    Attr       LSize Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert LV UUID                               
  mylv  myvg  -wi-----p- 1.99g                                                     amWg6N-kmJH-BU1Q-zbKK-1VoU-vFU6-Z2Tgge
  mylv1 myvg1 -wi-ao---- 1.99g                                                     0i4lMU-2fNk-hBbI-KSOj-NZAO-OUQW-xdf82B
  root  rhel  -wi-ao---- 8.47g                                                     1fAIAP-XO8H-phK6-8cNY-rmw2-RExF-fHP9uU
  swap  rhel  -wi-ao---- 1.00g                                                     0gWvr1-ZQnl-NoBb-EDVx-Wfli-jR5u-BVWwQM
[root@clust-node2 ~]# pvs -o+UUID
  WARNING: Device for PV hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI not found or rejected by a filter.
  Couldn't find device with uuid hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI.
  PV                 VG    Fmt  Attr PSize    PFree  PV UUID                               
  /dev/mapper/mpathe myvg1 lvm2 a--  1020.00m     0  VGodsg-02KE-jjtY-zuGT-yg6o-Lzbt-VcNiAV
  /dev/sda2          rhel  lvm2 a--     9.51g 40.00m hR0rLp-UbbA-1w1o-aGeW-Ymeh-nQsh-kIpKRZ
  /dev/vda1          myvg  lvm2 a--  1020.00m     0  6tSgXm-9pd1-dAPz-C2cj-vX5L-gpJK-WpGU9z
  /dev/vda2          myvg1 lvm2 a--  1020.00m     0  4wQnSx-o2cN-ErSW-H1rj-Oi5E-bFBt-lJT4DU
  [unknown]          myvg  lvm2 a-m  1020.00m     0  hM2oHz-BEbJ-7XUV-AfPf-QdZg-2NNq-CvCYpI


Version-Release number of selected component (if applicable):
RHEL 7

How reproducible:
In description

Steps to Reproduce:
In description



Additional info:

This was discussed during the gss+engineering call and we decided to open this bz for brainstorming, and a possible solution for this problem. Note we realize its an incorrect cluster configuration. However, this bz is to check if anything can be done from the LVM side for better protection against data corruption in such situations.

Comment 2 David Teigland 2020-05-18 14:26:27 UTC
Created attachment 1689602 [details]
patch

patch I wrote some weeks ago when this first came up

Comment 3 Jonathan Earl Brassow 2020-08-13 18:40:59 UTC
A somewhat invasive change in a late stage release to catch a problem with a mis-configured system.  Setting as WONTFIX.  If this does turn out to be a frequent occurrence, we could revisit; but better to have users with correct settings.


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