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--- tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2009/02/05 14:36] – created ccumer
+++ tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2010/04/27 12:44] – kohofer
@@ Line 1: / Line 1: @@
-======VM disk Expansion LVM+XFS========
+======VM disk Expansion LVM+XFS=======
+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
+**THEN TAKE A SNAPSHOT!!!**
+then from on the vm either create an additional partition on the free space. The partition type is 8e
+  cfdisk /dev/sda
+# for example if the new partition is /dev/sda3
+# create logical disk /dev/sda3
+# make disk visible to linux
+  partprobe
+  pvcreate /dev/sda3
+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/<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
+  --- Logical volume ---
+  LV Name                /dev/base/root
+  VG Name                base
+  LV UUID                8cL9Qd-ksIn-1Ve2-94ym-gTrW-8jet-91tnah
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                5.00 GB
+  Current LE             1280
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:0
+  --- Logical volume ---
+  LV Name                /dev/base/tmp
+  VG Name                base
+  LV UUID                mEnEXY-UtOf-P439-MDpg-BlT3-n8hI-Q6KIfm
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                1.00 GB
+  Current LE             256
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:1
+  --- Logical volume ---
+  LV Name                /dev/base/swap
+  VG Name                base
+  LV UUID                fm2A23-FPb3-itQa-Fvf2-QQmj-giwI-j8FZAf
+  LV Write Access        read/write
+  LV Status              available
+  # open                 2
+  LV Size                2.00 GB
+  Current LE             512
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:2
+  --- Logical volume ---
+  LV Name                /dev/base/data
+  VG Name                base
+  LV UUID                GZKUbb-hZn2-igXN-3dxj-TNz9-1C15-I8u8MR
+  LV Write Access        read/write
+  LV Status              available
+  # open                 1
+  LV Size                1.52 GB
+  Current LE             389
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     0
+  Block device           254:3
+and we assume the new partition is /dev/sda3
+  vgextend base /dev/sda3
+check with ''pvscan'' if the extend was successfull
+  pvscan
+Now we extend the "data" partition to 11.5 GB. See man lvextend for other options\\
+.5 G is the NEW total size of the disk we want to extend!
+  lvextend -L 11.5G  /dev/base/data
+Extend with 20G
+  lvextend -L +20G  /dev/base/data
+now we have to grow the filesystem /data
+   xfs_growfs /data
+===== For swap =====
+swapoff /dev/base/swap
+lvextend -L 3.9G /dev/base/swap
+mkswap /dev/base/swap
+swapon /dev/base/swap
+free
+Check if filesystems are ok, and only then release the snapshot
+For ext2/ext3
+  resize2fs /dev/base/data