[linux-lvm] mirror volume split

[Anatoly Pugachev]

13:01 < kabi_> looking into WHATS new  -   2.02.116 fixes  raid1
--splitmirror
13:05 < kabi_> (and got broken in 2.02.112 - so your 114 release is
affected)

PS: there's updated package at
http://download.opensuse.org/repositories/systemsmanagement/openSUSE_13.2/x86_64/
with lvm2 2.02.120 version. Use at your own risk, since messing with
device-mapper and lvm2 can easily break something (like booting of server).

On Thu, Oct 8, 2015 at 12:53 PM, Anatoly Pugachev <matorola at gmail.com>
wrote:

> to reply myself,
>
> probably bug in md raid1 implementation of lvm2, since it's quite a new
> code in 2014 lvm2.
>
> Fixed with help from irc #lvm, thanks to kabi :
>
> ithaqua:/mnt # lvremove vg1/split1
> Do you really want to remove active logical volume split1? [y/n]: y
>   Logical volume "split1" successfully removed
> ithaqua:/mnt # lvremove vg1/gatewayVol_rmeta_1
> Do you really want to remove active logical volume gatewayVol_rmeta_1?
> [y/n]: y
>   Logical volume "gatewayVol_rmeta_1" successfully removed
> ithaqua:/mnt # lvremove vg1/gatewayVol_rmeta_0
> Do you really want to remove active logical volume gatewayVol_rmeta_0?
> [y/n]: y
>   Logical volume "gatewayVol_rmeta_0" successfully removed
> ithaqua:/mnt # lvremove vg1/gatewayVol_rimage_1
>   Logical volume "gatewayVol_rimage_1" successfully removed
>
> ithaqua:/mnt # lvconvert -m1 vg1/gatewayVol
>   device-mapper: create ioctl on vg1-gatewayVol_rimage_0 failed: Device or
> resource busy
>   Failed to lock logical volume vg1/gatewayVol.
>
> ithaqua:/mnt # lvs
>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
> Move Log Cpy%Sync Convert
>   gatewayVol          vg1  -wi-ao----
> 8.00g
>   gatewayVol_rimage_1 vg1  -wi-------
> 8.00g
>   gatewayVol_rmeta_0  vg1  -wi-a-----
> 4.00m
>   gatewayVol_rmeta_1  vg1  -wi-------   4.00m
>
>
> ithaqua:/mnt # lvremove vg1/gatewayVol_rmeta_1
> Do you really want to remove active logical volume gatewayVol_rmeta_1?
> [y/n]: y
>   Logical volume "gatewayVol_rmeta_1" successfully removed
> ithaqua:/mnt # lvremove vg1/gatewayVol_rmeta_0
> Do you really want to remove active logical volume gatewayVol_rmeta_0?
> [y/n]: y
>   Logical volume "gatewayVol_rmeta_0" successfully removed
> ithaqua:/mnt # lvremove vg1/gatewayVol_rimage_1
>   Logical volume "gatewayVol_rimage_1" successfully removed
>
> ithaqua:/mnt # lvs
>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
> Move Log Cpy%Sync Convert
>   gatewayVol          vg1  -wi-ao----   8.00g
>
> ithaqua:/mnt # dmsetup table | grep gate
> vg1-gatewayVol_rimage_0: 0 16777216 linear 8:5 714926080
> vg1-gatewayVol: 0 16777216 linear 8:5 714926080
>
> ithaqua:/mnt # dmsetup info -c | grep gate
> vg1-gatewayVol_rimage_0          254  52 L--w    0    1      0
> LVM-BynKRpbJnegQy2RbeN9sxON1zKghQ7Fw2Q4aqEReJHtPNxXFyPyaXz040c5y3ZWA
> vg1-gatewayVol                   254  55 L--w    1    1      0
> LVM-BynKRpbJnegQy2RbeN9sxON1zKghQ7FwMYUKRXvsN40JWStnPz6PSjxrlg0QxmCb
>
> ithaqua:/mnt # dmsetup ls --tree
> vg1-gatewayVol_rimage_0 (254:52)
>  L- (8:5)
> vg1-gatewayVol (254:55)
>  L- (8:5)
>
> ithaqua:/mnt # dmsetup remove vg1-gatewayVol_rimage_0
> ithaqua:/mnt # dmsetup info -c | grep gate
> vg1-gatewayVol                   254  55 L--w    1    1      0
> LVM-BynKRpbJnegQy2RbeN9sxON1zKghQ7FwMYUKRXvsN40JWStnPz6PSjxrlg0QxmCb
> ithaqua:/mnt # dmsetup table | grep gate
> vg1-gatewayVol: 0 16777216 linear 8:5 714926080
>
>
> ithaqua:/mnt # lvconvert -m1 vg1/gatewayVol
> ithaqua:/mnt # lvs -a | grep gate
>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
> Move Log Cpy%Sync Convert
>   gatewayVol                     vg1  rwi-aor---
> 8.00g                                    10.84
>   [gatewayVol_rimage_0]          vg1  Iwi-aor---
> 8.00g
>   [gatewayVol_rimage_1]          vg1  Iwi-aor---
> 8.00g
>   [gatewayVol_rmeta_0]           vg1  ewi-aor---
> 4.00m
>   [gatewayVol_rmeta_1]           vg1  ewi-aor---   4.00m
>
>
>
>
> On Thu, Oct 8, 2015 at 12:17 PM, Anatoly Pugachev <matorola at gmail.com>
> wrote:
>
>> Hello!
>>
>> Trying to split one of mirror volumes :
>>
>> # lvs
>>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
>> Move Log Cpy%Sync Convert
>>   gatewayVol          vg1  rwi-aor---
>> 8.00g                                    100.00
>>
>> # lvconvert --splitmirrors 1 -n split1 vg1/gatewayVol
>> # lvs
>>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
>> Move Log Cpy%Sync Convert
>>   gatewayVol          vg1  -wi-ao----   8.00g
>>   split1              vg1  -wi-a-----   8.00g
>>
>> converting original volume back to mirror configuration, leaving split1
>> volume intact:
>>
>> # lvconvert -m1 vg1/gatewayVol
>>   device-mapper: create ioctl on vg1-gatewayVol_rimage_1 failed: Device
>> or resource busy
>>   Failed to lock logical volume vg1/gatewayVol.
>>
>> # lvs
>>   LV                  VG   Attr       LSize   Pool Origin Data%  Meta%
>> Move Log Cpy%Sync Convert
>>   gatewayVol          vg1  -wi-ao----   8.00g
>>   gatewayVol_rimage_1 vg1  -wi-------   8.00g
>>   gatewayVol_rmeta_0  vg1  -wi-a-----   4.00m
>>   gatewayVol_rmeta_1  vg1  -wi-a-----   4.00m
>>   split1              vg1  -wi-a-----   8.00g
>>
>> So, what I should do now? What is rimage* and rmeta* ? How do I get rid
>> of them, preserving data on gatewayVol and split1 volumes?
>>
>> Thanks.
>>
>> PS: opensuse 13.2
>>
>> # lvm version
>>   LVM version:     2.02.114(2) (2014-11-28)
>>   Library version: 1.03.01 (2014-11-28)
>>   Driver version:  4.27.0
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/linux-lvm/attachments/20151008/21499217/attachment.htm>