Differences

This shows you the differences between two versions of the page.

--- tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2011/08/11 16:13] – kohofer
+++ tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2012/11/15 17:35] – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== 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.
-  cfdisk /dev/sda
+If you are on a kernel newer or equal to 2.6.32 then you can issue the command
-# for example if the new partition is /dev/sda3
-# create logical disk /dev/sda3
+<code>echo "1" > /sys/block/sdX/device/rescan</code>
-# make disk visible to linux
+to get the new size w/o reboot.
-  partprobe
-  pvcreate /dev/sda3
+In case you cant see the "disk" do this:
-if you are running a newer kernel you can issue this command to male linux re-read the disk geometry:
+  echo "1" > /sys/class/scsi_device/2\:0\:0\:0/device/rescan
-  echo "1" > /sys/class/scsi_device/<device>/device/rescan
+whereby after scsi_device you need to find the correct scsi device
+**EXPAND ORIGINAL DISK**
-or assign the whole new disk to lvm assuming it's /dev/sdb
+Create an additional partition on the free space, say you increased the existing disc
+from 8GB to 15GB. The partition type is 8e.
-  apt-get install scsitools
+  cfdisk /dev/sda
-  rescan-scsi-bus.sh
-  cfdisk /dev/sdb
-### for example if the new partition is /dev/sda3
+# for example if the new partition is /dev/sda3
-   pvcreate /dev/sdb
+# create logical disk /dev/sda3
+# make disk visible to linux
+  partprobe
+  pvcreate /dev/sda3
-now you have to extend the volgroup. use ''lvdisplay'' to see which is the name of the group, in this example it's base
+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
@@ Line 103: / Line 107: @@
 .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
   lvextend -L +20G  /dev/base/data
@@ Line 114: / Line 116: @@
    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, **but only if the FS is unmounted**
+  fsck.ext4 -f /dev/base
+Now resize the filesystem
+  resize2fs -p /dev/base/root
 ===== 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
-For ext2/ext3
-  resize2fs /dev/base/data
 ======= Create LVM =======