[linux-lvm] Difficulties with creating RAID1 LV
Anatoly Pugachev
matorola at gmail.com
Tue Jun 30 14:56:22 UTC 2015
Tried same setup on rhel7 :
[root at rhel7 ~]# rpm -q lvm2
lvm2-2.02.115-3.el7.x86_64
[root at rhel7 ~]# pvcreate /dev/sdb1 /dev/sdc1
Physical volume "/dev/sdb1" successfully created
Physical volume "/dev/sdc1" successfully created
[root at rhel7 ~]# vgcreate vmhost-vg /dev/sdb1 /dev/sdc1
Volume group "vmhost-vg" successfully created
[root at rhel7 ~]# lvcreate --verbose --type raid1 --mirrors 1 --extents 1 -n
testlv vmhost-vg
Finding volume group "vmhost-vg"
Archiving volume group "vmhost-vg" metadata (seqno 1).
Creating logical volume testlv
Creating logical volume testlv_rimage_0
Creating logical volume testlv_rmeta_0
Creating logical volume testlv_rimage_1
Creating logical volume testlv_rmeta_1
activation/volume_list configuration setting not defined: Checking only
host tags for vmhost-vg/testlv_rmeta_0
Creating vmhost--vg-testlv_rmeta_0
Loading vmhost--vg-testlv_rmeta_0 table (253:2)
Resuming vmhost--vg-testlv_rmeta_0 (253:2)
Clearing metadata area of vmhost-vg/testlv_rmeta_0
Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_0" with
value 0.
Removing vmhost--vg-testlv_rmeta_0 (253:2)
activation/volume_list configuration setting not defined: Checking only
host tags for vmhost-vg/testlv_rmeta_1
Creating vmhost--vg-testlv_rmeta_1
Loading vmhost--vg-testlv_rmeta_1 table (253:2)
Resuming vmhost--vg-testlv_rmeta_1 (253:2)
Clearing metadata area of vmhost-vg/testlv_rmeta_1
Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_1" with
value 0.
Removing vmhost--vg-testlv_rmeta_1 (253:2)
Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 3).
Activating logical volume "testlv" exclusively.
activation/volume_list configuration setting not defined: Checking only
host tags for vmhost-vg/testlv
Creating vmhost--vg-testlv_rmeta_0
Loading vmhost--vg-testlv_rmeta_0 table (253:2)
Resuming vmhost--vg-testlv_rmeta_0 (253:2)
Creating vmhost--vg-testlv_rimage_0
Loading vmhost--vg-testlv_rimage_0 table (253:3)
Resuming vmhost--vg-testlv_rimage_0 (253:3)
Creating vmhost--vg-testlv_rmeta_1
Loading vmhost--vg-testlv_rmeta_1 table (253:4)
Resuming vmhost--vg-testlv_rmeta_1 (253:4)
Creating vmhost--vg-testlv_rimage_1
Loading vmhost--vg-testlv_rimage_1 table (253:5)
Resuming vmhost--vg-testlv_rimage_1 (253:5)
Creating vmhost--vg-testlv
Loading vmhost--vg-testlv table (253:6)
Resuming vmhost--vg-testlv (253:6)
Monitoring vmhost-vg/testlv
Wiping known signatures on logical volume "vmhost-vg/testlv"
Initializing 4.00 KiB of logical volume "vmhost-vg/testlv" with value 0.
Logical volume "testlv" created.
[root at rhel7 ~]# lvs -a vmhost-vg
LV VG Attr LSize Pool Origin Data% Meta%
Move Log Cpy%Sync Convert
testlv vmhost-vg rwi-a-r---
4.00m 100.00
[testlv_rimage_0] vmhost-vg iwi-aor---
4.00m
[testlv_rimage_1] vmhost-vg iwi-aor---
4.00m
[testlv_rmeta_0] vmhost-vg ewi-aor---
4.00m
[testlv_rmeta_1] vmhost-vg ewi-aor--- 4.00m
[root at rhel7 ~]# dmsetup status
vmhost--vg-testlv_rmeta_1: 0 8192 linear
vmhost--vg-testlv_rmeta_0: 0 8192 linear
vmhost--vg-testlv_rimage_1: 0 8192 linear
vmhost--vg-testlv_rimage_0: 0 8192 linear
vmhost--vg-testlv: 0 8192 raid raid1 2 AA 8192/8192 idle 0
[root at rhel7 ~]# dmsetup table vmhost--vg-testlv
0 8192 raid raid1 3 0 region_size 1024 2 253:2 253:3 253:4 253:5
On Sat, Jun 27, 2015 at 11:48 AM, MegaBrutal <megabrutal at gmail.com> wrote:
> Hi all,
>
> Nowadays it's difficult to create raid1 LVs, or converting linear LVs
> to raid1. If I try hard, once it succeeds, but it's not supposed to
> work like this. I'm on Ubuntu Vivid. I've never experienced this
> before, but I didn't create much raid1 LVs before I added plus PVs.
> But I don't remember ever having this problem, so whatever it is,
> probably it's introduced with Vivid.
>
>
> Case 1: Creating raid1 LV
>
> root at vmhost:~# lvcreate --verbose --type raid1 --mirrors 1 --extents 1
> --name testlv vmhost-vg
> DEGRADED MODE. Incomplete RAID LVs will be processed.
> Setting logging type to disk
> Finding volume group "vmhost-vg"
> Archiving volume group "vmhost-vg" metadata (seqno 112).
> Creating logical volume testlv
> Creating logical volume testlv_rimage_0
> Creating logical volume testlv_rmeta_0
> Creating logical volume testlv_rimage_1
> Creating logical volume testlv_rmeta_1
> activation/volume_list configuration setting not defined: Checking
> only host tags for vmhost-vg/testlv_rmeta_0
> Creating vmhost--vg-testlv_rmeta_0
> Loading vmhost--vg-testlv_rmeta_0 table (252:122)
> Resuming vmhost--vg-testlv_rmeta_0 (252:122)
> Clearing metadata area of vmhost-vg/testlv_rmeta_0
> Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_0"
> with value 0.
> Removing vmhost--vg-testlv_rmeta_0 (252:122)
> activation/volume_list configuration setting not defined: Checking
> only host tags for vmhost-vg/testlv_rmeta_1
> Creating vmhost--vg-testlv_rmeta_1
> Loading vmhost--vg-testlv_rmeta_1 table (252:122)
> Resuming vmhost--vg-testlv_rmeta_1 (252:122)
> Clearing metadata area of vmhost-vg/testlv_rmeta_1
> Initializing 512 B of logical volume "vmhost-vg/testlv_rmeta_1"
> with value 0.
> Removing vmhost--vg-testlv_rmeta_1 (252:122)
> Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 114).
> Activating logical volume "testlv" exclusively.
> activation/volume_list configuration setting not defined: Checking
> only host tags for vmhost-vg/testlv
> Creating vmhost--vg-testlv_rmeta_0
> Loading vmhost--vg-testlv_rmeta_0 table (252:122)
> Resuming vmhost--vg-testlv_rmeta_0 (252:122)
> Creating vmhost--vg-testlv_rimage_0
> Loading vmhost--vg-testlv_rimage_0 table (252:123)
> Resuming vmhost--vg-testlv_rimage_0 (252:123)
> Creating vmhost--vg-testlv_rmeta_1
> Loading vmhost--vg-testlv_rmeta_1 table (252:124)
> Resuming vmhost--vg-testlv_rmeta_1 (252:124)
> Creating vmhost--vg-testlv_rimage_1
> Loading vmhost--vg-testlv_rimage_1 table (252:125)
> Resuming vmhost--vg-testlv_rimage_1 (252:125)
> Creating vmhost--vg-testlv
> Loading vmhost--vg-testlv table (252:126)
> device-mapper: reload ioctl on failed: Device or resource busy
> Removing vmhost--vg-testlv (252:126)
> Failed to activate new LV.
> Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 115).
>
> Result: nothing is actually created according to "lvs -a".
>
>
> Case 2: Create linear LV and then convert it to raid1
>
> root at vmhost:~# lvcreate --verbose --extents 1 --name testlv vmhost-vg
> DEGRADED MODE. Incomplete RAID LVs will be processed.
> Setting logging type to disk
> Finding volume group "vmhost-vg"
> Archiving volume group "vmhost-vg" metadata (seqno 115).
> Creating logical volume testlv
> Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 116).
> Activating logical volume "testlv".
> activation/volume_list configuration setting not defined: Checking
> only host tags for vmhost-vg/testlv
> Creating vmhost--vg-testlv
> Loading vmhost--vg-testlv table (252:126)
> Resuming vmhost--vg-testlv (252:126)
> Wiping known signatures on logical volume "vmhost-vg/testlv"
> Initializing 4.00 KiB of logical volume "vmhost-vg/testlv" with value
> 0.
> Creating volume group backup "/etc/lvm/backup/vmhost-vg" (seqno 116).
> Logical volume "testlv" created
>
> root at vmhost:~# lvs -a | grep testlv
> testlv vmhost-vg -wi-a----- 4.00m
>
> root at vmhost:~# lvconvert --verbose --type raid1 --mirrors 1
> vmhost-vg/testlv
> DEGRADED MODE. Incomplete RAID LVs will be processed.
> Archiving volume group "vmhost-vg" metadata (seqno 116).
> Creating logical volume testlv_rmeta_0
> Creating logical volume testlv_rmeta_1
> Creating logical volume testlv_rimage_0
> activation/volume_list configuration setting not defined: Checking
> only host tags for vmhost-vg/testlv_rmeta_0
> Creating vmhost--vg-testlv_rmeta_0
> device-mapper: create ioctl on vmhost--vg-testlv_rmeta_0 failed:
> Device or resource busy
> Failed to activate localy testlv_rmeta_0 for clearing
>
> root at vmhost:~# lvs -a | grep testlv
> testlv vmhost-vg -wi-a----- 4.00m
> testlv_rimage_1 vmhost-vg -wi------- 4.00m
> testlv_rmeta_0 vmhost-vg -wi------- 4.00m
> testlv_rmeta_1 vmhost-vg -wi------- 4.00m
>
> Result: mirror and meta LVs are created as distinct linear LVs and are
> not bound together to form a raid1 LV.
>
>
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