tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2009/02/05 15:11] – ccumer | tech:documentation:procedures:vm:vm_disk_expansion_lvm_xfs [2017/11/14 10:50] – kohofer | ||
---|---|---|---|
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> |
- | **THEN TAKE A SNAPSHOT!!!** | + | |
- | then from on the vm either create an additional partirion on the free space. The partition type us 8e | + | Expand the original disk or add a second vdisk from **Infrastructure Client**.\\ |
- | <code> | + | <del>If you want to perform a grow w/o reboot you have to add a second disk.</del> |
- | cfdisk | + | |
- | ### for example if the new partition is /dev/sda3 | + | |
- | pvcreate /dev/sda3 | + | |
- | </code> | + | |
- | or assign the whole new disk to lvm | + | If you are on a kernel newer or equal to 2.6.32 then you can issue the command |
- | < | + | |
- | cfdisk /dev/sdb | + | |
- | ### for example if the new partition is /dev/sda3 | + | |
- | pvcreate /dev/sdb | + | |
- | </ | + | |
- | now you have to extend the volgroup. user '' | + | < |
- | <code> | + | to get the new size w/o reboot. |
- | vgextend | + | |
- | </code> | + | |
+ | In case you cant see the " | ||
+ | |||
+ | echo "- - -" | ||
+ | |||
+ | Do this for all host0,1,2 etc. | ||
+ | |||
+ | |||
+ | or | ||
+ | |||
+ | echo " | ||
+ | |||
+ | whereby after scsi_device you need to find the correct scsi device | ||
+ | |||
+ | or | ||
+ | |||
+ | apt-get install scsitools | ||
+ | rescan-scsi-bus | ||
+ | |||
+ | At the end it should list that a new device was found, note down the name/ | ||
+ | |||
+ | echo ' | ||
+ | |||
+ | IMPORTANT: Be sure to replace the 32\:0\:1\:0 with the appropriate disk for your purposes. | ||
+ | |||
+ | |||
+ | **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 or cfdisk /dev/sdb | ||
+ | |||
+ | # for example if the new partition is /dev/sda3 | ||
+ | |||
+ | # create logical disk /dev/sda3 of type 8e (Linux LVM) | ||
+ | |||
+ | # make disk visible to linux | ||
+ | |||
+ | partprobe | ||
+ | pvcreate /dev/sda3 | ||
+ | |||
+ | now you have to extend the volgroup. use '' | ||
+ | in this example it's **base** | ||
+ | |||
+ | lvdisplay | ||
+ | --- Logical volume --- | ||
+ | LV Name / | ||
+ | VG Name base | ||
+ | LV UUID 8cL9Qd-ksIn-1Ve2-94ym-gTrW-8jet-91tnah | ||
+ | LV Write Access | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size 5.00 GB | ||
+ | Current LE | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Name / | ||
+ | VG Name base | ||
+ | LV UUID mEnEXY-UtOf-P439-MDpg-BlT3-n8hI-Q6KIfm | ||
+ | LV Write Access | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size 1.00 GB | ||
+ | Current LE 256 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Name / | ||
+ | VG Name base | ||
+ | LV UUID fm2A23-FPb3-itQa-Fvf2-QQmj-giwI-j8FZAf | ||
+ | LV Write Access | ||
+ | LV Status | ||
+ | # open 2 | ||
+ | LV Size 2.00 GB | ||
+ | Current LE 512 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Name / | ||
+ | VG Name base | ||
+ | LV UUID GZKUbb-hZn2-igXN-3dxj-TNz9-1C15-I8u8MR | ||
+ | LV Write Access | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size 1.52 GB | ||
+ | Current LE 389 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | Block device | ||
+ | |||
+ | |||
+ | and we assume the new partition is /dev/sda3 | ||
+ | |||
+ | vgextend base /dev/sda3 | ||
check with '' | check with '' | ||
- | Now we extend the " | + | pvscan |
- | < | + | Now we extend the " |
- | lvextend | + | 11.5 G is the NEW total size of the disk we want to extend! |
- | </code> | + | |
+ | Extend the LV to use all free space | ||
+ | lvextend -l +100%FREE | ||
+ | |||
+ | Extend with 20G | ||
+ | lvextend -L +20G | ||
now we have to grow the filesystem /data | now we have to grow the filesystem /data | ||
- | < | + | |
- | xfs_growfs /data | + | |
- | </code> | + | |
+ | |||
+ | ===== FOR EXT3/4 ===== | ||
+ | |||
+ | Extend filesystem | ||
+ | |||
+ | vgextend base /dev/sda3 | ||
+ | |||
+ | lvextend -l +100%FREE / | ||
+ | |||
+ | Check that the filesystem is ok, **but only if the FS is unmounted** | ||
+ | |||
+ | fsck.ext4 -f /dev/base | ||
+ | |||
+ | Now resize the filesystem | ||
+ | |||
+ | Debian System: | ||
+ | |||
+ | resize2fs -p / | ||
+ | |||
+ | Centos/ | ||
+ | |||
+ | resize4fs -p / | ||
+ | |||
+ | ===== For swap ===== | ||
+ | |||
+ | swapoff / | ||
+ | lvextend -L 3.9G / | ||
+ | mkswap / | ||
+ | swapon / | ||
+ | free | ||
+ | |||
+ | Check if filesystems are ok, and only then release the snapshot | ||
+ | |||
+ | |||
+ | ======= Create LVM ======= | ||
+ | |||
+ | Find all LVM VG | ||
+ | |||
+ | vgscan | ||
+ | |||
+ | Create Physical Volumes | ||
+ | |||
+ | Der Befehl pvcreate legt den VGDA Block auf dem PV an. Er muss für jedes PV ausgeführt werden, bevor es von LVM verwendet werden kann: | ||
+ | |||
+ | | ||
+ | |||
+ | Volume Groups anlegen | ||
+ | |||
+ | Jetzt legen wir mit ' | ||
+ | |||
+ | | ||
+ | |||
+ | Logische Volumes anlegen. | ||
+ | |||
+ | Hier legen wir jetzt alle unsere logischen Volumes an. Als Namen verwenden wir, etwas fantasielos, | ||
+ | |||
+ | | ||
+ | |||
+ | oder wir könne die Größen angeben! (1500M) | ||
+ | |||
+ | | ||
+ | |||
+ | Filesysteme anlegen | ||
+ | |||
+ | Ab jetzt können die logischen Partitionen, | ||
+ | |||
+ | mkfs.ext4 / | ||
+ | |||
+ | fstab anpassen | ||
+ | |||
+ | Damit die neuen Filesysteme nun bei jedem Systemstart automatisch gemountet werden, müssen wir sie in die Datei /etc/fstab eintragen (siehe 'man fstab' | ||
+ | |||
+ | / | ||
+ | |||
+ | ===== Links ===== | ||
+ | |||
+ | |||
+ | [[http:// | ||
+ | [[https:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | [[http:// | ||
+ | |||
+ | |||
+ | http:// | ||
+ | http:// |
/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