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binro
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PostPosted: Mon Sep 27, 2010 4:36 pm    Post subject: lvm2 warning messages at boot Reply with quote

I have just rebooted for the first time for ages and received these messages:

    * Setting up the Logical Volume Manager ...
    The link /dev/vg00/rootfs should had been created by udev but it was not found. Falling back to direct link creation.
    The link /dev/vg00/home should had been created by udev but it was not found. Falling back to direct link creation.
    The link /dev/vg00/var should had been created by udev but it was not found. Falling back to direct link creation.
    The link /dev/vg00/tmp should had been created by udev but it was not found. Falling back to direct link creation.
    The link /dev/vg00/portage should had been created by udev but it was not found. Falling back to direct link creation.
    The link /dev/vg00/swap should had been created by udev but it was not found. Falling back to direct link creation.

Everything proceeds OK but naturally I would like to get to the bottom of this. Searching shows other people get these messages but it is not clear why. I changed all my /etc/fstab entries from /dev/vg00/part to /dev/mapper/vg00-part but that made no difference. Looking at /etc/udev/rules.d I can see nothing to do with lvm. I tried re-emerging lvm2 and udev to see if there were new config files but dispatch-conf showed no changes. I have lvm2-2.02.73-r1 and udev-162. Any ideas?

TIA
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rh1
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PostPosted: Mon Sep 27, 2010 4:50 pm    Post subject: Reply with quote

I get that same message using lvm. I noticed it only occurs on my system for the volumes I activate in my initramfs. I was using "vgchange -ay" and I'd get that message for all of my logical volumes. Then I switched to " lvchange -ay <group>/<rootfs>" and i only get it for the rootfs. I thought that was the issue as to why the link wasn't created, volume is already active and since it has a fallback method i didn't see any harm.
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binro
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PostPosted: Mon Sep 27, 2010 4:59 pm    Post subject: Reply with quote

rh1 wrote:
I was using "vgchange -ay" and I'd get that message for all of my logical volumes. Then I switched to " lvchange -ay <group>/<rootfs>" and i only get it for the rootfs.

How do you do that? You roll your own initrd? I am using genkernel for the ramdisk.
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rh1
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PostPosted: Tue Sep 28, 2010 2:37 pm    Post subject: Reply with quote

Quote:
How do you do that? You roll your own initrd? I am using genkernel for the ramdisk.

Yes, I have my own initramfs. Basically all it does is activate and mount rootfs which is on lvm and dumps me in a "rescue shell" if something goes wrong. Nice instructions here.
No idea how to make genkernel do that. Of course you can probably just ignore those warnings, the fallback method takes care of the link so i don't see the harm.
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ConiKost
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PostPosted: Sun Oct 31, 2010 12:52 am    Post subject: Reply with quote

Are there any news on this?
I am also using my own initrd, as my gentoo is crypted with luks.
Is there any way to fix those warnings?
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rh1
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PostPosted: Sun Oct 31, 2010 2:45 am    Post subject: Reply with quote

In my opinion it's harmless. I've never noticed anything wrong because of it. I think it is more of a "just so you know" type of warning in case for example you weren't using an initrd and udev should have created the link. But like it says, udev didn't create the link so it did. Which makes sense since the volume was activated in the initrd before udev was started.
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whywhy
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PostPosted: Mon May 09, 2011 8:06 am    Post subject: Reply with quote

This is can resolved by adding the following in the file /lib64/rcscripts/addons/lvm-start.sh

udevadm trigger --action=change --attr-match=dm/name

This will cause udevd to create the proper link

Code:
if [ -d /proc/lvm ] || dm_in_proc ; then
      ebegin "Setting up the Logical Volume Manager"
      #still echo stderr for debugging
      # Extra PV find pass because some devices might not have been av
ailable until very recently
      /sbin/pvscan --config "${config}" >/dev/null
      # Now make the nodes
      udevadm trigger --action=change --attr-match=dm/name

      /sbin/vgscan --mknodes --config "${config}" >/dev/null
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katabami
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PostPosted: Tue May 10, 2011 1:55 am    Post subject: Reply with quote

Is it worth risking wrong edits? It's not once, but you may have to do 'dispatch-conf' in the future.

By the way, there's also shutdown time message. I ignore it too, but the above fix may make you get rid of it.
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marc2gentoo
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PostPosted: Sun Oct 09, 2011 4:49 pm    Post subject: Reply with quote

Now I have the exact same "problem". I will test the solution "whywhy" suggested, but before i'll make a backup.

Any News about this behaviour?

Thanks
Marc

PS:
What I've done?
Grub2+LVM2+GPT+RAID5
-> root with boot on lvm
Booting with Grub2 from a BIOS-Boot-Partition.
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lkraav
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PostPosted: Sun Oct 09, 2011 5:01 pm    Post subject: Reply with quote

aidecoe has tinkered with this with his work on dracut, but afaik with no success.
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marc2gentoo
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PostPosted: Sun Oct 09, 2011 5:46 pm    Post subject: Reply with quote

@Ikraav
thx for reply

Do you know something about the solution from "whywhy"? Maybe this could be a durable solution?

#Marc
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lkraav
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PostPosted: Sun Oct 09, 2011 6:02 pm    Post subject: Reply with quote

marc2gentoo wrote:
@Ikraav
Do you know something about the solution from "whywhy"? Maybe this could be a durable solution?
#Marc


it's lowercase L-kraav actually. :)

i pointed aidecoe to this thread, he tried the workaround, but reportedly did not have success with it. neither did i.
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marc2gentoo
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PostPosted: Sun Oct 09, 2011 6:27 pm    Post subject: Reply with quote

sorry :lol:

Quote:
i pointed aidecoe to this thread

I really appriciate that, I'm very new to gentoo... (no contacts to devs, few experience about linux/gentoo)

Quote:
he tried the workaround, but reportedly did not have success with it. neither did i.

So I will keep my hands off that... :?
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marc2gentoo
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PostPosted: Sun Oct 16, 2011 5:36 pm    Post subject: Reply with quote

Any News on this topic?
Maybe I should change to dracut basically...

I'm afraid to go on with the cluster (drbd and so on)...
The mdraid is not shutting down, until the lvm did not stop...

#Marc
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lkraav
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PostPosted: Sun Oct 16, 2011 7:58 pm    Post subject: Reply with quote

marc2gentoo wrote:
Any News on this topic?
Maybe I should change to dracut basically...
I'm afraid to go on with the cluster (drbd and so on)...
The mdraid is not shutting down, until the lvm did not stop...
#Marc


dracut is probably a good idea regardless, but this problem also exists on dracut.
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binro
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PostPosted: Fri Jan 11, 2013 5:00 pm    Post subject: Reply with quote

I just created a new lv and I got this:
Code:


# lvcreate -L 15G -n /dev/vg00/arch
  /dev/mapper/vg00-arch not set up by udev: Falling back to direct node creation.
  The link /dev/vg00/arch should had been created by udev but it was not found. Falling back to direct link creation.
  Logical volume "arch" created

There are numerous hits on this and they all talk about missing udev rules. I have the latest udev and lvm which provide all the rules, so what is wrong?

Edit: Using -vvvv I get this message, which is reported in other reports I found

    #ioctl/libdm-iface.c:1721 Uevent not generated! Calling udev_complete internally to avoid process lock-up.

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Where there ain't no Ten Commandments an' a man can raise a thirst"
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