Xen project Mailing List

2008/6/12 Stephan Seitz <s.seitz@xxxxxxxxxxxx>:

Hi,

i assume your lvm problem is caused by an overeager udev configuration
which sets up device entries for partitions _inside_ the lv as well as for
the lv itself.

try to
# kpartx -d /dev/yourvg/yourlv
to release these mapper entries before lvremove the lv.

if you renamed this lv, you need to check and re-assign /dev/mapper entries
manually before you're able to remove the entries.

when you're done, check for updated udev and/or lvm packages for your distro.

cheers,

Stephan

Souza Anderson schrieb:

Hi...
I have had a problem when I am going to detach one specific LVM partitions of Xen, so I have been trying xm destroy <domain>, lvchange -an <lvm_partition>, lvremove -f.... So I haven't had sucess. I restarted the server with init 1 yet and nothing... I have seem two specific process started xenwatch and xenbus, but I am not sure if this processes have some action over LVM partitions + XEN. I need to know how can I remove this partition to build another xen VM, an if I need to stop the xend and xendomais services to do the detachment.
Thanks so much!!!!
VG Name VGxen
LV UUID vsdRV1-j7cA-LlZI-dAvv-yPC1-lCEt-OQY3W3
LV Write Access read/write
LV Status available
# open 4
LV Size 17.69 GB
Current LE 4529
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
srv01-Debian:~# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 238 1 r----- 29.2
vm01 1 256 1 -b---- 0.1
srv01-Debian:~# xm destroy vm01
srv01-Debian:~# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 238 1 r----- 31.5
srv01-Debian:~# lvdisplay
--- Logical volume ---
LV Name /dev/VGxen/VM01_Debian
VG Name VGxen
LV UUID vsdRV1-j7cA-LlZI-dAvv-yPC1-lCEt-OQY3W3
LV Write Access read/write
LV Status available
# open 2
LV Size 17.69 GB
Current LE 4529
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
srv01-Debian:~# lvchange -an /dev/VGxen/VM01_Debian
LV VGxen/VM01_Debian in use: not deactivating
srv01-Debian:~#
srv01-Debian:~# /etc/init.d/xendomains stop
Shutting down Xen domains: [done]
srv01-Debian:~# lvchange -an /dev/VGxen/VM01_Debian
LV VGxen/VM01_Debian in use: not deactivating
srv01-Debian:~#
srv01-Debian:~# /etc/init.d/xend stop
srv01-Debian:~# lvchange -an /dev/VGxen/VM01_Debian
LV VGxen/VM01_Debian in use: not deactivating
srv01-Debian:~# ps -ef |grep -auxf xen
grep: xen: No such file or directory
srv01-Debian:~# ps -ef |grep xen
root 9 7 0 14:12 ? 00:00:00 [xenwatch]
root 10 7 0 14:12 ? 00:00:00 [xenbus]
root 4698 1 0 14:13 ? 00:00:00 xenstored --pid-file /var/run/xenstore.pid
root 4705 1 0 14:13 ? 00:00:00 xenconsoled
root 4706 4705 0 14:13 ? 00:00:00 xenconsoled
root 4707 4706 0 14:13 ? 00:00:00 xenconsoled
root 5331 5030 0 14:19 pts/1 00:00:00 grep xen
srv01-Debian:~# lvremove -f VGxen
Can't remove open logical volume "VM01_Debian"
srv01-Debian:~# lvremove -f /dev/VGxen/VM01_Debian
Can't remove open logical volume "VM01_Debian"
srv01-Debian:~# lvs
LV VG Attr LSize Origin Snap% Move Log Copy%
VM01_Debian VGxen -wi-ao 17.69G
srv01-Debian:~# vgs
VG #PV #LV #SN Attr VSize VFree
VGxen 1 1 0 wz--n- 17.69G 0
srv01-Debian:~# pvs
PV VG Fmt Attr PSize PFree
/dev/hda5 VGxen lvm2 a- 17.69G 0

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Stephan Seitz
Senior System Administrator

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Re: [Xen-users] Detach specific partition LVM of XEN