Migrating Physical Volume root to LVM - Revision history

Sfiggins: /* Create new physical volume = */

2019-08-22T04:38:03Z

Create new physical volume =

Sfiggins: /* Extend the LV */

2019-08-22T02:48:45Z

Extend the LV

Sfiggins: /* Extend the pv, vg and lv */

2019-08-22T02:45:40Z

Extend the pv, vg and lv

Sfiggins: /* Copy the /dev partition */

2019-08-22T02:35:56Z

Copy the /dev partition

Sfiggins at 02:04, 22 August 2019

2019-08-22T02:04:23Z

Sfiggins: /* Create LVM Physical Volume */

2019-08-22T01:52:34Z

Create LVM Physical Volume

Sfiggins: Created page with "== Expand hard drive == Assuming you are on VMware, you just shut down and increase the virtual hard drive size. You should know how to do this, so I won;t include it here...."

2019-08-22T01:51:53Z

Created page with "== Expand hard drive == Assuming you are on VMware, you just shut down and increase the virtual hard drive size. You should know how to do this, so I won;t include it here...."

New page

== Expand hard drive ==

Assuming you are on VMware, you just shut down and increase the virtual hard drive size. You should know how to do this, so I won;t include it here. You may also be able to add a physical or virtual disk.

== Create LVM Physical Volume ==

Using fdisk, add a new partition with type 8e. If possible, leave room between the end of the last existing partition and the new partition.

Using pvcreate, create the physical lvm volume.

<code>
# pvcreate /dev/sdb1
</code

@@ Line 177: / Line 177: @@
 Using pvcreate, like before.
-</pre>
+<pre>
 # pvcreate /dev/sda2
 </pre>

@@ Line 228: / Line 228: @@
 <pre>
-# lvresize -l 100%FREE /dev/VolGroup00/root
+# lvresize -l +100%FREE /dev/VolGroup00/root
 </pre>

← Older revision		Revision as of 02:45, 22 August 2019
Line 211:		Line 211:
	when finished, you can run partprobe or reboot to refresh the partitin table.		when finished, you can run partprobe or reboot to refresh the partitin table.

−	== Extend the pv, ~~vg and lv~~ ==	+	== Extend the pv ==
		+
		+	Using pvresize, extend the PV size.
		+
		+	<pre>
		+	# pvresize /dev/sda2
		+	</pre>
		+
		+	<pre>
		+	# pvdisplay /dev/sda2
		+	</pre>
		+
		+	== Extend the LV ==
		+
		+	You don't need to change the VG, but you will need to change the LV using lvresize. This can be done while the system is live.
		+
		+	<pre>
		+	# lvresize -l 100%FREE /dev/VolGroup00/root
		+	</pre>
		+
		+	== Extend the file system ==
		+
		+	Extend the file system using resize2fs.
		+
		+	<pre>
		+	# resize2fs /dev/VolGroup00/root
		+	</pre>

← Older revision		Revision as of 02:35, 22 August 2019
Line 75:		Line 75:

	== Copy the /dev partition ==		== Copy the /dev partition ==
		+
		+	<pre>
		+	# cp -aux /dev /mnt/dev
		+	</pre>
		+
		+	== Edit new fstab ==
		+
		+	Edit the new fstab to change from old partition to new partition.
		+
		+	<pre>
		+	# vi /mnt/etc/fstab
		+	</pre>
		+
		+	'''Be sure to fix both root and swap partitions'''
		+
		+	== Switch to single user mode ==
		+
		+	This is optional, but may help.
		+
		+	<pre>
		+	# init 1
		+	</pre>
		+
		+	== Repeat rsync ==
		+
		+	This should be fast, and will only copy anything that changed.
		+
		+	<pre>
		+	# rsync --archive --sparse --one-file-system --delete-during --delete-excluded \
		+	--force --numeric-ids --hard-links / /mnt/
		+	</pre>
		+
		+	== Mount extra directories ==
		+
		+	You will need to mount a bunch of directories to get the kernel to work.
		+
		+	<pre>
		+	# for i in proc dev sys dev/pts boot ; do mount -o bind /$i /mnt/$i ; done
		+	</pre>
		+
		+	== Now chroot to the new volume ==
		+
		+	You will need to do this to get the kernel to install locally.
		+
		+	<pre>
		+	# chroot /mnt
		+	</pre>
		+
		+	== Update Kernel ==
		+
		+	Depending on your version of OS, you will be able to run one of the following. You may want to have the RPM for the kernel already donwloaded to root's directory.
		+
		+	<pre>
		+	# update-grub
		+	</pre>
		+
		+	OR
		+
		+	<pre>
		+	# mkinitrd -v /boot/initrd-`uname -r`.img `uname -r`
		+	</pre>
		+
		+	OR
		+
		+	<pre>
		+	# rpm -i --replacepkgs kernel-2.6.18-486.el5.rpm
		+	</pre>
		+
		+	'''If you have any errors or messages, fix them before you reboot.'''
		+
		+	== Unmount and reboot ==
		+
		+	At this point, you should be able to unmount and reboot the system.
		+
		+	<pre>
		+	# exit
		+	# i in proc sys dev/pts dev boot var /; do umount /mnt/$i ; done
		+	# shutdown -r now
		+	</pre>
		+
		+	== Boot into single user mode ==
		+
		+	It is not critical to boot into single user mode, as this should be able to be done live, but it is safer to do in single user mode.
		+
		+	== Delete old partitions ==
		+
		+	Using fdisk, remove your old root and swap partitions.
		+
		+	== Add new physical partitions ==
		+
		+	Using fdisk, again, add a new primary partition of type 8e. This should replace the partitions you just removed.
		+
		+	After this is complete, you may need to reboot or run partprobe to refresh the partition table.
		+
		+	<pre>
		+	# partprobe
		+	</pre>
		+
		+	== Create new physical volume ===
		+
		+	Using pvcreate, like before.
		+
		+	</pre>
		+	# pvcreate /dev/sda2
		+	</pre>
		+
		+	== Extend Volume Group ==
		+
		+	<pre>
		+	# vgextend VolGroup00 /dev/sda2
		+	</pre>
		+
		+	== Move volumes to new PV ==
		+
		+	<pre>
		+	# pvmove /dev/sda4
		+	</pre>
		+
		+	== Remove PV from VG ==
		+
		+	<pre>
		+	# vgreduce VolGroup00 /dev/sda4
		+	</pre>
		+
		+	== Delete old PV ==
		+
		+	<pre>
		+	# pvremove /dev/sda4
		+	</pre>
		+
		+	== Use fdisk to remove and resize partitions ==
		+
		+	Delete both LVM partitions, and create a new partitions, type 8e, that starts in the same place as /dev/sda2. You want this to be larger than the old /dev/sda2, as you are extending the partitions.
		+
		+	when finished, you can run partprobe or reboot to refresh the partitin table.
		+
		+	== Extend the pv, vg and lv ==

@@ Line 9: / Line 9: @@
 Using pvcreate, create the physical lvm volume.
-<code>
+<pre>
-# pvcreate /dev/sdb1
+# pvcreate /dev/sda4
-</code>
+</pre>
-<nowiki>
+Using vgcreate, vreate new volume group
 ----
-Insert non-formatted text here</nowiki>
+<pre>