RHCS6: Extend an existing Logical Volume / GFS2 filesystem

RHCS: Extend an existing Logical Volume / GFS2 filesystem

# Tested on RHEL 6

# We are extending a given GFS2 filesystem like following one by adding 1GB:

df -h /sharedfs
   Filesystem            Size  Used Avail Use% Mounted on
   /dev/mapper/gfsvg-lv_gfs
                      4.0G  259M  3.8G   7% /sharedfs
lvs | grep lv_gfs
     lv_gfs   gfsvg  -wi-ao---   4.00g



# Variable definition

VG=gfsvg
LV=lv_gfs
MNTPT=/sharedfs
SIZETOADD=1GB
FINALSIZE=5GB
        # Final Size



# First of all check if there is available space on the volume group the F.S. belongs to

vgs $VG
     VG    #PV #LV #SN Attr   VSize VFree
     gfsvg   1   1   0 wz--nc 8.00g 4.00g
                                  ^
                                  ^


# Let's extend the logical volume by specifying the size to be added:

lvextend -L +$SIZETOADD $VG/$LV
     Extending logical volume lv_gfs to 5.00 GiB
     Logical volume lv_gfs successfully resized

# or by specifying the final size:
#
# lvextend -L $FINALSIZE $VG/$LV
#      Extending logical volume lv_gfs to 5.00 GiB
#      Logical volume lv_gfs successfully resized


# Test what the tool will do

gfs2_grow -T /dev/$VG/$LV


# ...and then actually resize the GFS2

gfs2_grow /dev/$VG/$LV
   FS: Mount Point: /sharedfs
   FS: Device:      /dev/dm-8
   FS: Size:        1048575 (0xfffff)
   FS: RG size:     65533 (0xfffd)
   DEV: Size:       1310720 (0x140000)
   The file system grew by 1024MB.
   gfs2_grow complete.

# or 'gfs2_grow $MNTPT'


df -h $MNTPT
   Filesystem            Size  Used Avail Use% Mounted on
   /dev/mapper/gfsvg-lv_gfs
                         5.0G  259M  4.8G   6% /sharedfs
0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
stunnel How To Encrypt Traffic to Redis with Stunnel on Ubuntu 16.04
Viewed 120 times since Sun, Dec 6, 2020
Linux get the list of FC HBA’s and WWPN
Viewed 1267 times since Tue, May 22, 2018
Exclude multiple files and directories with rsync
Viewed 679 times since Wed, Oct 31, 2018
Kernel sysctl configuration file for Linux
Viewed 1414 times since Fri, Aug 3, 2018
HOWTO: Use SSL/port 465 in smarthost stunnel
Viewed 901 times since Fri, Sep 28, 2018
logrotate - rotates, compresses, and mails system logs.
Viewed 653 times since Fri, Nov 30, 2018
How To: Linux Hard Disk Encryption With LUKS [ cryptsetup Command ]
Viewed 1135 times since Fri, Jul 13, 2018
12 Tcpdump Commands – A Network Sniffer Tool
Viewed 817 times since Fri, Jul 27, 2018
Linux – How to check the exit status of several piped commands
Viewed 1646 times since Wed, Jul 25, 2018
RHEL: Extending a multipath LUN
Viewed 1539 times since Sun, May 27, 2018