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John King 11-19-2012 08:26 PM

How to expand the "/" logical volume on a RHEL 5.7 Vmware Guest Server
 
Hello Everyone,

I'm stuck in a situation where I need to manage a Vmware guest server machine which I need not layout the partitioning scheme but need to get things done on it. There is only 3.3G allocated to the / which is an LV. I would have allocated more space ideally. I have never expanded the / LVM which has filled up 100% and I'm unable to install an application software on it, which is where I'm seeking your expertise.

File System Layout:
===================

df -TH O/P:

Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-lv_root
ext3 3.3G 3.1G 0 100% /
/dev/mapper/VolGroup00-lv_usr
ext3 5.4G 1.8G 3.3G 36% /usr
/dev/mapper/VolGroup00-lv_home
ext3 4.3G 144M 4.0G 4% /home
/dev/mapper/VolGroup00-lv_var
ext3 5.4G 1.3G 3.8G 26% /var
/dev/mapper/VolGroup00-lv_opt
ext3 7.2G 525M 6.3G 8% /opt
/dev/mapper/VolGroup00-lv_tmp
ext3 2.3G 71M 2.1G 4% /tmp
/dev/sda1 ext3 112M 21M 86M 20% /boot
tmpfs tmpfs 9.5G 0 9.5G 0% /dev/shm


This is the message I see when installing the application;

[root@mldev3 opt]# rpm -ivh Application.rpm
Preparing... ########################################### [100%]
installing package Application needs 40KB on the / filesystem


[root@xxx opt]# pvs
/dev/hdc: open failed: No medium found
PV VG Fmt Attr PSize PFree
/dev/sda2 VolGroup00 lvm2 a- 49.88G 3.59G

[root@xxx opt]# vgs
/dev/hdc: open failed: No medium found
VG #PV #LV #SN Attr VSize VFree
VolGroup00 1 7 0 wz--n- 49.88G 3.59G

[root@xxx opt]# lvs
/dev/hdc: open failed: No medium found
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
lv_home VolGroup00 -wi-ao 4.12G
lv_opt VolGroup00 -wi-ao 6.91G
lv_root VolGroup00 -wi-ao 3.12G
lv_swap VolGroup00 -wi-ao 19.75G
lv_tmp VolGroup00 -wi-ao 2.12G
lv_usr VolGroup00 -wi-ao 5.12G
lv_var VolGroup00 -wi-ao 5.12G

[root@xxx opt]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.7

[root@xxx opt]# uname -a
Linux xxx 2.6.18-274.3.1.el5 #1 SMP Fri Aug 26 18:49:02 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux


Any detailed inputs to resolve this will be helpful. Thanks in advance!

Regards
J

custangro 11-20-2012 01:53 PM

It looks like you have about 3G available on your VG

**WARNING DO THIS AT YOUR OWN RISK AS I DO NOT ACCEPT RESPONSIBILITY FOR DATA LOSS**

First add the space to the LV

Code:

lvextend -l +100%FREE VolGroup00/lv_root
Next resize it

Code:

resize2fs /dev/VolGroup00/lv_root
You can resize while the system is online.

--C

John King 11-20-2012 01:56 PM

Thanks custangro. Works like a charm!

Regards
J


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