I'm trying to increase the size of a Linux Red Hat Virtual Machine by 10Gig. This is just on a Test Server I created that I'm trying to figure out.
I increased the VM by 10 gig with this command
[root@rh01 images]# qemu-img resize TestServer.img +10G
Image resized.
Then I followed this link https://gist.github.com/larsks/3933980 to finish
I got all the way where the last command is resize2fs and I get this error
[root@TestServer bmac]# resize2fs /dev/vda2
resize2fs 1.41.12 (17-May-2010)
resize2fs: Device or resource busy while trying to open /dev/vda2
Couldn't find valid filesystem superblock.
Here are all the steps I took:
[root@rh01 admin]# virt-df -h /home/admin/images/TestServer.img
Filesystem Size Used Available Use%
TestServer.img:/dev/sda1 484M 63M 396M 14%
TestServer.img:/dev/vg_template/lv_root 40G 4.0G 34G 10%
[root@rh01 admin]# virt-list-partitions -lh /home/admin/images/TestServer.img
/dev/sda1 ext4 500.0M
/dev/sda2 pv 48.3G
[root@rh01 admin]# cd images/
[root@rh01 images]# qemu-img resize TestServer.img +10G
Image resized.
[root@rh01 images]# virt-df -h /home/admin/images/TestServer.img
Filesystem Size Used Available Use%
TestServer.img:/dev/sda1 484M 63M 396M 14%
TestServer.img:/dev/vg_template/lv_root 40G 4.0G 34G 10%
[root@rh01 images]# virt-list-partitions -lh /home/admin/images/TestServer.img
/dev/sda1 ext4 500.0M
/dev/sda2 pv 48.3G
[root@rh01 images]# ls -l TestServer.img
-rw-------. 1 root root 63166218240 May 1 08:55 TestServer.img
[root@rh01 images]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/vg_rh01-lv_root 51606140 7845612 41139088 17% /
tmpfs 99166276 296 99165980 1% /dev/shm
/dev/sda1 495844 92445 377799 20% /boot
/dev/mapper/vg_rh01-lv_home 3305120248 494277716 2642952000 16% /home
[root@rh01 images]# df -B 4k
Filesystem 4K-blocks Used Available Use% Mounted on
/dev/mapper/vg_rh01-lv_root
12901535 1961403 10284772 17% /
tmpfs 24791569 74 24791495 1% /dev/shm
/dev/sda1 123961 23112 94450 20% /boot
/dev/mapper/vg_rh01-lv_home
826280062 123569429 660738000 16% /home
[root@rh01 images]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rh01-lv_root
50G 7.5G 40G 17% /
tmpfs 95G 296K 95G 1% /dev/shm
/dev/sda1 485M 91M 369M 20% /boot
/dev/mapper/vg_rh01-lv_home
3.1T 472G 2.5T 16% /home
Boot VM and Login
[bmac@TestServer ~]$ su
Password:
[root@TestServer bmac]# cd
[root@TestServer ~]# fdisk /dev/vda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/vda: 63.2 GB, 63166218240 bytes
16 heads, 63 sectors/track, 122392 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000cd4ad
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 101588 50686976 8e Linux LVM
Partition 2 does not end on cylinder boundary.
Command (m for help): d
Partition number (1-4): 2
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (1-122392, default 1): 1018
Last cylinder, +cylinders or +size{K,M,G} (1018-122392, default 122392): 122392
Command (m for help): p
Disk /dev/vda: 63.2 GB, 63166218240 bytes
16 heads, 63 sectors/track, 122392 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000cd4ad
Device Boot Start End Blocks Id System
/dev/vda1 * 3 1018 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/vda2 1018 122392 61172544 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[bmac@TestServer ~]$ su
Password:
[root@TestServer bmac]# df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_template-lv_root
40G 4.0G 34G 11% /
[root@TestServer bmac]# resize2fs /dev/vda2
resize2fs 1.41.12 (17-May-2010)
resize2fs: Device or resource busy while trying to open /dev/vda2
Couldn't find valid filesystem superblock.
[root@TestServer bmac]# resize4fs /dev/vda2
bash: resize4fs: command not found
[root@TestServer bmackenzie]# resize2fs /dev/mapper/vg_template-lv_root
resize2fs 1.41.12 (17-May-2010)
The filesystem is already 10622976 blocks long. Nothing to do!
[root@TestServer bmac]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_template-lv_root
40G 4.0G 34G 11% /
tmpfs 3.9G 80K 3.9G 1% /dev/shm
/dev/vda1 485M 64M 397M 14% /boot
Thanks for the info MadHatter. here are the exact steps I performed that worked for me in case anyone is looking for this
[root@TestServer bmac]# pvresize /dev/vda2
Physical volume "/dev/vda2" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
[root@TestServer bmac]# lvextend /dev/mapper/vg_template-lv_root -L +10G
Extending logical volume lv_root to 50.52 GiB
Logical volume lv_root successfully resized
[root@TestServer bmackenzie]# resize2fs /dev/mapper/vg_template-lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_template-lv_root is mounted on /; on-line resizing required
old desc_blocks = 3, new_desc_blocks = 4
Performing an on-line resize of /dev/mapper/vg_template-lv_root to 13244416 (4k) blocks.
The filesystem on /dev/mapper/vg_template-lv_root is now 13244416 blocks long.
Best Answer
There are a bunch of steps you need to do, if memory serves.
Firstly, you'll need to use
pvresizeto expand the existing PV to the new top-of-partition.Then you'll need to use
lvresizeorlvextendto resize the existing LV volume(s) into the enlarged PV.Then you can use
resize2fsto resize the file system(s) into the new enlarged volume(s).