[linux-lvm] confused with lvm2 filter rules

[Heming Zhao]

Hello list,

Can anybody help me for this question?
I tried on suse & centos with lvm2-2.02.180, both system have this issue.

The filter in /etc/lvm/lvm.conf only works with vgextend command.
It take no effect on pvcreate, vgcreate & vgreduce.

Thank you.

On 6/3/19 9:03 PM, Heming Zhao wrote:
> Hello,
> 
> I met below filter action when executed 'vgextend'.
> why the filter take no effect on executing pvcreate or vgcreate?
> 
> ```
> # ls -l /dev/disk/by-id/scsi-*
> lrwxrwxrwx 1 root root 9 Jun  3 20:44 /dev/disk/by-id/scsi-360073a707 ->
> ../../sda
> lrwxrwxrwx 1 root root 9 Jun  3 20:44 /dev/disk/by-id/scsi-36007c0036 ->
> ../../sdb
> lrwxrwxrwx 1 root root 9 Jun  3 20:27 /dev/disk/by-id/scsi-3600b99ec4 ->
> ../../sdc
> # pvcreate /dev/disk/by-id/scsi-36073a707 /dev/disk/by-id/scsi-36007c0036
> # pvs
>     PV         VG Fmt  Attr PSize PFree
>     /dev/sda      lvm2 ---  2.00g 2.00g
>     /dev/sdb      lvm2 ---  2.00g 2.00g
> # vgcreate vgtst /dev/disk/by-id/scsi-36073a707
> /dev/disk/by-id/scsi-36007c0036hy the filter take no effect on executing
> pvcreate or vgcreate?
> # vgs
>     VG    #PV #LV #SN Attr   VSize VFree
>     vgtst   2   0   0 wz--n- 3.98g 3.98g
> # vgextend vgtst /dev/disk/by-id/scsi-3600b99ec4
>     Device /dev/disk/by-id/scsi-3600b99ec4 excluded by a filter.
> # vgs
>     VG    #PV #LV #SN Attr   VSize VFree
>     vgtst   2   0   0 wz--n- 3.98g 3.98g
> 
> my enviroment:
> # rpm -qa | grep lvm2
> lvm2-clvm-2.02.180-8.16.x86_64
> lvm2-cmirrord-2.02.180-8.16.x86_64
> lvm2-2.02.180-8.16.x86_64
> 
> the filter rules:  (you can see all the disk in /dev/disk/by-id/ are
> rejected)
> # grep filter /etc/lvm/lvm.conf | grep -v "#"
>       filter = [ "r|/dev/.*/by-path/.*|", "r|/dev/.*/by-id/.*|",
> "r|/dev/fd.*|", "r|/dev/cdrom|", "a/.*/" ]
> ```
> 
> 
> Thank you.
> zhm
> 
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