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tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2011/08/11 16:13] – kohofertech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2012/03/27 15:48] – kohofer
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-====== VM disk Expansion LVM+XFS =======+====== VM disk Expansion LVM with XFS/EXT4 =======
  
-Expand the original disk or add a second vdisk from Infrastructure client.\\ If you want to perform a grow w/o reboot you have to add a second disk +<note important>CREATE SNAPSHOT</note>
-**THEN TAKE A SNAPSHOT!!!**+
  
-then from on the vm either create an additional partition on the free space. The partition type is 8e+Expand the original disk or add a second vdisk from **Infrastructure Client**.\\ 
 +If you want to perform a grow w/o reboot you have to add a second disk 
 + 
 +In case you cant see the "disk" do this: 
 + 
 +  echo "1" > /sys/class/scsi_device/2\:0\:0\:0/device/rescan 
 + 
 +whereby after scsi_device you need to find the correct scsi device 
 + 
 +**EXPAND ORIGINAL DISK** 
 + 
 +Create an additional partition on the free space, say you increased the existing disc 
 +from 8GB to 15GB. The partition type is 8e.
  
   cfdisk /dev/sda   cfdisk /dev/sda
 +
 # for example if the new partition is /dev/sda3 # for example if the new partition is /dev/sda3
  
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   pvcreate /dev/sda3   pvcreate /dev/sda3
  
- +now you have to extend the volgroup. use ''lvdisplay'' to see which is the name of the group,\\ 
-if you are running a newer kernel you can issue this command to male linux re-read the disk geometry: +in this example it's **base**
- +
-  echo "1" > /sys/class/scsi_device/<device>/device/rescan +
- +
- +
-or assign the whole new disk to lvm assuming it's /dev/sdb +
- +
-  apt-get install scsitools +
-  rescan-scsi-bus.sh +
-  cfdisk /dev/sdb +
- +
-### for example if the new partition is /dev/sda3 +
- +
-   pvcreate /dev/sdb +
- +
-now you have to extend the volgroup. use ''lvdisplay'' to see which is the name of the group, in this example it's base+
  
   lvdisplay    lvdisplay 
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 11.5 G is the NEW total size of the disk we want to extend! 11.5 G is the NEW total size of the disk we want to extend!
  
- +Extend the LV to use all free space 
-  lvextend -L 11.5G  /dev/base/data+  lvextend -l +100%FREE /dev/base/data
  
 Extend with 20G Extend with 20G
- 
- 
   lvextend -L +20G  /dev/base/data    lvextend -L +20G  /dev/base/data 
  
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    xfs_growfs /data    xfs_growfs /data
 +
 +
 +===== FOR EXT3/4 =====
 +
 +Extend filesystem  to use all free space
 +
 +  vgextend base /dev/sda3
 +
 +  lvextend -l +100%FREE /dev/base/root
 +
 +Check that the filesystem is ok
 +
 +  fsck.ext4 -f /dev/base
 +
 +Now resize the filesystem
 +
 +  resize2fs -p /dev/base/root
  
  
 ===== For swap ===== ===== For swap =====
  
-swapoff /dev/base/swap  +  swapoff /dev/base/swap 
-lvextend -L 3.9G /dev/base/swap  +  lvextend -L 3.9G /dev/base/swap 
-mkswap /dev/base/swap  +  mkswap /dev/base/swap 
-swapon /dev/base/swap  +  swapon /dev/base/swap 
-free+  free
  
 Check if filesystems are ok, and only then release the snapshot Check if filesystems are ok, and only then release the snapshot
  
-For ext2/ext3 
- 
-  resize2fs /dev/base/data 
  
 ======= Create LVM ======= ======= Create LVM =======
/data/www/wiki.inf.unibz.it/data/pages/tech/documentation/procedures/vm/vm_disk_expansion_lvm_xfs.txt · Last modified: 2020/10/13 16:46 by kohofer