Resizing root virtual disk on the CentOS Post: 302591843

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Operating Systems Linux Red Hat Resizing root virtual disk on the CentOS Post 302591843 by sds9985 on Saturday 21st of January 2012 01:03:41 AM

01-21-2012

Registered User

I think fdisk will show you that the size of the disk has changed, but the size of the partition being used as the pv for LVM hasn't changed. The space you added is just now shown as free space on the disk. I'd use fdisk to create another partition using the space you added. Then pvcreate on the new partition (probably /dev/sda3), add it to the volume group with vgextend, extend the logical volume with lvextend and then resize the filesystem with resize2fs.

Something like this (after creating the new partition with fdisk and assuming you added 10GB):

Code:

 
# pvcreate /dev/sda3
# vgextend rootvg /dev/sda3
# lvextend -L +10G /dev/rootvg/rootlv
# resize2fs -p /dev/rootvg/rootlv

Adjust the size added and the name of the vg and lv to fit your situation...

BTW, we'd usually just add another virtual disk to the guest, pvcreate it, vgextend the volume group onto it, lvextend the lv and resize2fs the filesystem. That way, you're not trying to resize or repartition a live disk.

Also, if you add another virtual disk and are going to use the whole thing as a pv, you don't need to have a partition table or to create a partition - just use the name of the whole disk.

Code:

 
pvcreate /dev/sdb
vgextend rootvg /dev/sdb
... and so on

Cheers!

sds9985

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tk_getvrootgeometry

Tk_GetVRootGeometry(3)					       Tk Library Procedures					    Tk_GetVRootGeometry(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tk_GetVRootGeometry - Get location and size of virtual root for window

SYNOPSIS

       #include <tk.h>

       Tk_GetVRootGeometry(tkwin, xPtr, yPtr, widthPtr, heightPtr)

ARGUMENTS

       Tk_Window tkwin (in)		 Token for window whose virtual root is to be queried.

       int xPtr (out)			 Points to word in which to store x-offset of virtual root.

       int yPtr (out)			 Points to word in which to store y-offset of virtual root.

       int widthPtr (out)		 Points to word in which to store width of virtual root.

       int heightPtr (out)		 Points to word in which to store height of virtual root.
_________________________________________________________________

DESCRIPTION

       Tk_GetVRootGeometry returns geometry information about the virtual root window associated with tkwin.  The "associated" virtual root is the
       one in which tkwin's nearest top-level ancestor (or tkwin itself if it is a top-level window) has been reparented by  the  window  manager.
       This  window  is  identified  by  a __SWM_ROOT or __WM_ROOT property placed on the top-level window by the window manager.  If tkwin is not
       associated with a virtual root (e.g.  because the window manager does not use virtual roots) then *xPtr and *yPtr will  be  set	to  0  and
       *widthPtr and *heightPtr will be set to the dimensions of the screen containing tkwin.

KEYWORDS

       geometry, height, location, virtual root, width, window manager

Tk									4.0						    Tk_GetVRootGeometry(3)