Hi,
there is only one dm-device in /dev:
...
drwxr-xr-x 5 root root 100 2012-04-05 12:50 disk
brw-rw---- 1 root disk 251, 18 2012-04-05 12:51 dm-18
drwxr-xr-x 4 root root 80 2012-04-05 12:51 drbd
...
/dev/data/kvm_disk0 is a blockdevice for drbd, so there are many drbd files in /dev
...
brw-rw---- 1 root disk 147, 20 2012-04-08 11:48 drbd20
...
drbd20 is the drbd resource using kvm_disk0 as device.
The symlink in /dev/data/ is:
lrwxrwxrwx 1 root root 24 2012-04-05 12:51 kvm_disk0 -> ../mapper/data-kvm_disk0
Should I be using this:
filter = [ "r|/dev/mapper/data-kvm_disk0|", "r|/dev/kvm_disk0|", "a|.*|"]
I know, it is a little bit confusing.
The LV in VG data is called kvm_disk0 and the VG initiated on this device is also called kvm_disk0.
Sorry, but thank you for help.
Regards,
Erik
----- Original Message -----
From: "Bryn M. Reeves" <bmr@redhat.com>
To: "LVM general discussion and development" <linux-lvm@redhat.com>
Cc: "Erik Schwalbe" <erik.schwalbe@canoo.com>
Sent: Thursday, 12 April, 2012 1:52:20 PM
Subject: Re: Hide volume group during startup
On 04/12/2012 12:41 PM, Erik Schwalbe wrote:
> Hi,
>
> filter was:
>
> filter = [ "r|/dev/data/kvm_disk0|" ]
>
> path:
> /dev/data/kvm_disk0 -> ../mapper/data-kvm_disk0
To filter a device-mapper device you also have to filter out the
/dev/dm-N device nodes that udev manages. There's also a symlink from
/dev/$VG_NAME/$LV_NAME to the dm-N node (although I think that should be
handled by filtering /dev/dm-N).
I'd be using something like:
[ "r|/dev/dm.*|", "r|/dev/$VG_NAME|", "a|.*|"]
Alternately (and I prefer this for many configurations) you can accept
("a|..|") the device you need for the data VG and reject all other
devices ("r|.*|").
> The device name is stable, but what other way of control activation are possible??
Tags but since you're not currently filtering dm-N nodes I would try
that first.
Regards,
Bryn.
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