Setting up Logical Volumes with LVM - Revision history

Prabuanand: fixed formatting and added wikilinks

2025-03-26T13:52:12Z

fixed formatting and added wikilinks

← Older revision		Revision as of 13:52, 26 March 2025
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	~~[[Category:Storage]]~~		This page documents how to create logical volumes in Alpine using lvm2. LVM is collection of programs that allow physical disks to be reassembled into "logical" disks that can be shrunk or expanded as data needs change.
	~~{{Tip\|~~This ~~process can be done automatically by using the [[setup-disk]] script, using the -L option.}}~~
	~~This document~~ how to create logical volumes in Alpine using lvm2.

	~~LVM is collection of programs that allow physical disks to be reassembled into "logical" disks that~~ can be ~~shrunk or expanded as data needs change~~.		{{Tip\|The process mentioned here can be done automatically by using the [[setup-disk]] script, using the -L option.}}

	In this document we will use a [[Setting up a software RAID array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[Setting up ~~a basic vserver~~\|vservers ]]		In this document we will use a [[Setting up a software RAID array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[#Setting up /vservers partition\|vservers ]]

	=== Installing LVM software ===		=== Installing LVM software ===
	~~First we need to load the kernel driver, ''dm-mod''~~

	~~{{Cmd\|modprobe dm-mod}}~~

	~~We also want it to be loaded during next reboot.~~

	{{Cmd\|~~echo~~ dm-mod ~~>> /etc/modules-load.d/dm.conf~~}}		First we need to load the kernel driver, ''dm-mod'': {{Cmd\|modprobe dm-mod}}

	We also ~~need the userspace programs~~.		We also want it to be loaded during next reboot.: {{Cmd\|echo dm-mod >> /etc/modules-load.d/dm.conf}}

	{{Cmd\|apk add lvm2}}		We also need the userspace programs: {{Cmd\|apk add lvm2}}

	=== Preparing the physical volumes ===		=== Preparing the physical volumes ===
	~~First we need to tell LVM the partition is available as a physical volume and can be added to a volume group. In this example we use a software raid array as physical volume.~~

	{{Cmd\|pvcreate /dev/md0}}		First we need to tell LVM the partition is available as a physical volume and can be added to a volume group. In this example we use a software raid array as physical volume. {{Cmd\|pvcreate /dev/md0}}

	=== Preparing the Volume Group ===		=== Preparing the Volume Group ===
	~~We can then create a volume group and add the physical volume ''/dev/md0''~~

	{{Cmd\|vgcreate vg0 /dev/md0}}		We can then create a volume group and add the physical volume ''/dev/md0'' : {{Cmd\|vgcreate vg0 /dev/md0}}

	If we need more space later, we can add additional physcal volumes with ''vgextend''. All physcal disks/partitions added need to be prepared with ''pvcreate''.		If we need more space later, we can add additional physcal volumes with ''vgextend''. All physcal disks/partitions added need to be prepared with ''pvcreate''.

	=== Creating Logical volumes ===		=== Creating Logical volumes ===

	In the volume group we can create logical volumes. To create a 1GB volume called ''swap'' and a 6GB volume called 'vservers'' on the volume group ''vg0'' we run		In the volume group we can create logical volumes. To create a 1GB volume called ''swap'' and a 6GB volume called 'vservers'' on the volume group ''vg0'' we run

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	=== Display Logical Volumes ===		=== Display Logical Volumes ===
	~~You can now see the logical volumes with the lvdisplay utility.~~

			You can now see the logical volumes with the lvdisplay utility.
	lvdisplay		lvdisplay
	--- Logical volume ---		--- Logical volume ---
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	=== Extend Logical Volumes ===		=== Extend Logical Volumes ===

	If you want to add space and the volume has the room for it...		If you want to add space and the volume has the room for it...

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	=== Start LVM during Boot ===		=== Start LVM during Boot ===

	We want lvm to init the logical volumes during boot. There is a boot service named ''lvm'' to do this. If your volumes are on raid, make sure that ''/etc/init.d/lvm'' is started after mdadm-raid.		We want lvm to init the logical volumes during boot. There is a boot service named ''lvm'' to do this. If your volumes are on raid, make sure that ''/etc/init.d/lvm'' is started after mdadm-raid.

	{{Cmd\|rc-update add lvm boot}}		{{Cmd\|rc-update add lvm boot}}

	~~on Alpine Linux 1.8 or earlier:~~		=== Setting up swap ===

	~~{{Cmd\|rc_add -s 12 -k lvm}}~~

	~~=== Setting up swap ===~~
	Now we have our devices in /dev/vg0 and can use them as normal disk paritions. To set up swap:		Now we have our devices in /dev/vg0 and can use them as normal disk paritions. To set up swap:

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	=== Setting up /vservers partition ===		=== Setting up /vservers partition ===

	Finally we want to set up an XFS partition for /vservers.		Finally we want to set up an XFS partition for /vservers.

	Install xfsprogs.		Install xfsprogs.{{Cmd\|apk add xfsprogs}}

	~~{{Cmd\|apk add xfsprogs}}~~		Create filesystem on /dev/vg0/vservers. {{Cmd\|mkfs.xfs /dev/vg0/vservers}}

	Create filesystem on /dev/vg0/vservers.

	{{Cmd\|mkfs.xfs /dev/vg0/vservers}}

	Add the mount information to your /etc/fstab: NOTE:tagxid may cause this to not mount. Try this by hand and check dmesg to see if there are any errors:		Add the mount information to your /etc/fstab: NOTE:tagxid may cause this to not mount. Try this by hand and check dmesg to see if there are any errors:
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	=== Starting localmount and swap ===		=== Starting localmount and swap ===

	Now we can mount our partition.		Now we can mount our partition.{{Cmd\|mount /vservers}}
	{{Cmd\|mount /vservers}}
			We need to run ''localmount'' during boot, but it has to happen '''after''' lvm. In Alpine Linux 1.9 and later, this should not be needed: {{Cmd\|rc-update add localmount boot}}
	We need to run ''localmount'' during boot, but it has to happen '''after''' lvm. In Alpine Linux 1.9 and later, this should not be needed

	{{Cmd\|rc-update add localmount boot}}

	~~on Alpine Linux 1.8 or earlier:~~

	~~{{Cmd\|rc_add -s 14 -k localmount~~}}

	Start the swap service and make sure it starts during next reboot and that it starts '''after''' lvm.		Start the swap service and make sure it starts during next reboot and that it starts '''after''' lvm.

	{{Cmd\|rc-service swap start		{{Cmd\|rc-service swap start
	rc-update add swap}}		rc-update add swap}}

	~~on Alpine Linux 1.8 or earlier:~~		== See also ==
	~~{{Cmd\|rc-service swap start~~
	~~rc_add -s 14 -k swap}}~~

	~~=== More Info on LVM ===~~		* [[Setting up encrypted volumes with LUKS]]
	~~These resources may be helpful:~~

	* ~~the~~ [~~https://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks~~] ~~section in the [https://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto~~]
	* [[LVM_on_LUKS\| Alpine wiki page for LVM on LUKS]]		* [[LVM_on_LUKS\| Alpine wiki page for LVM on LUKS]]
			* [https://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks] section in the [https://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto]
	* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]		* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]
	* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]		* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]

			[[Category:Storage]]

Sertonix: replace /etc/init.d with rc-service

2023-11-17T10:29:35Z

replace /etc/init.d with rc-service

← Older revision		Revision as of 10:29, 17 November 2023
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	Start the swap service and make sure it starts during next reboot and that it starts '''after''' lvm.		Start the swap service and make sure it starts during next reboot and that it starts '''after''' lvm.

	{{Cmd\|~~/etc/init.d/~~swap start		{{Cmd\|rc-service swap start
	rc-update add swap}}		rc-update add swap}}

	on Alpine Linux 1.8 or earlier:		on Alpine Linux 1.8 or earlier:
	{{Cmd\|~~/etc/init.d/~~swap start		{{Cmd\|rc-service swap start
	rc_add -s 14 -k swap}}		rc_add -s 14 -k swap}}

Zcrayfish: /* Setting up /vservers partition */ Marked a hyperlink that cannot currently be upgraded to HTTPS.

2023-08-26T05:59:41Z

Setting up /vservers partition: Marked a hyperlink that cannot currently be upgraded to HTTPS.

← Older revision		Revision as of 05:59, 26 August 2023
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	/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0		/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0

	Note that the ''tagxid'' option is specific for setting up vserver [http://wiki.linux-vserver.org/Disk_Limits_and_Quota disk limits] so you might not want it.		Note that the ''tagxid'' option is specific for setting up vserver [http://wiki.linux-vserver.org/Disk_Limits_and_Quota disk limits]{{insecure url\|Connection refused on HTTPS port}} so you might not want it.
	The ''noatime'' option increases performance, but you will no longer know when files were last accessed.		The ''noatime'' option increases performance, but you will no longer know when files were last accessed.

Sertonix: update link

2023-08-25T20:33:41Z

update link

← Older revision		Revision as of 20:33, 25 August 2023
Line 116:		Line 116:
	/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0		/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0

	Note that the ''tagxid'' option is specific for setting up vserver [http://~~oldwiki~~.linux-vserver.org/~~Disk+Limits~~ disk limits] so you might not want it.		Note that the ''tagxid'' option is specific for setting up vserver [http://wiki.linux-vserver.org/Disk_Limits_and_Quota disk limits] so you might not want it.
	The ''noatime'' option increases performance, but you will no longer know when files were last accessed.		The ''noatime'' option increases performance, but you will no longer know when files were last accessed.

Sertonix: use https where possible

2023-08-07T10:31:49Z

use https where possible

← Older revision		Revision as of 10:31, 7 August 2023
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	These resources may be helpful:		These resources may be helpful:

	* the [~~http~~://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks] section in the [~~http~~://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto]		* the [https://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks] section in the [https://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto]
	* [~~http://wiki.alpinelinux.org/wiki/~~LVM_on_LUKS Alpine wiki page for LVM on LUKS]		* [[LVM_on_LUKS\| Alpine wiki page for LVM on LUKS]]
	* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]		* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]
	* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]		* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]

Bt129 at 09:10, 1 July 2021

2021-07-01T09:10:31Z

← Older revision		Revision as of 09:10, 1 July 2021
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	This document how to create logical volumes in Alpine using lvm2.		This document how to create logical volumes in Alpine using lvm2.

	LVM is collection of programs that allow ~~larger~~ physical disks to be reassembled into "logical" disks that can be shrunk or expanded as data needs change.		LVM is collection of programs that allow physical disks to be reassembled into "logical" disks that can be shrunk or expanded as data needs change.

	In this document we will use a [[Setting up a software RAID array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[Setting up a basic vserver\|vservers ]]		In this document we will use a [[Setting up a software RAID array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[Setting up a basic vserver\|vservers ]]

	=== Installing LVM software ===		=== Installing LVM software ===
	First we need to load the kernel driver, ''dm-mod''		First we need to load the kernel driver, ''dm-mod''
Line 20:		Line 21:

	=== Preparing the physical volumes ===		=== Preparing the physical volumes ===
	First we need to tell LVM ~~that~~ the partition is available as a physical volume and can be added to a volume group. In this example we use a software raid array as physical volume.		First we need to tell LVM the partition is available as a physical volume and can be added to a volume group. In this example we use a software raid array as physical volume.

	{{Cmd\|pvcreate /dev/md0}}		{{Cmd\|pvcreate /dev/md0}}
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	{{Cmd\|vgcreate vg0 /dev/md0}}		{{Cmd\|vgcreate vg0 /dev/md0}}

	If we ~~later~~ need more space we can add additional physcal volumes with ''vgextend''. All physcal disks/partitions added need to be prepared with ''pvcreate''.		If we need more space later, we can add additional physcal volumes with ''vgextend''. All physcal disks/partitions added need to be prepared with ''pvcreate''.

	=== Creating Logical volumes ===		=== Creating Logical volumes ===
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	=== Display Logical Volumes ===		=== Display Logical Volumes ===
	You can now se the logical volumes with the lvdisplay utility.		You can now see the logical volumes with the lvdisplay utility.

	lvdisplay		lvdisplay
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	{{Cmd\|rc-update add lvm boot}}		{{Cmd\|rc-update add lvm boot}}

	~~Or,~~ on Alpine Linux 1.8 or earlier:		on Alpine Linux 1.8 or earlier:

	{{Cmd\|rc_add -s 12 -k lvm}}		{{Cmd\|rc_add -s 12 -k lvm}}
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	{{Cmd\|mkfs.xfs /dev/vg0/vservers}}		{{Cmd\|mkfs.xfs /dev/vg0/vservers}}

	Add the mount information to your /etc/fstab: NOTE:tagxid may cause this not to mount. Try this by hand and check dmesg to see if there are any errors		Add the mount information to your /etc/fstab: NOTE:tagxid may cause this to not mount. Try this by hand and check dmesg to see if there are any errors:

	/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0		/dev/vg0/vservers /vservers xfs noatime,tagxid 0 0

	Note that the ''tagxid'' option is specific for setting up vserver [http://oldwiki.linux-vserver.org/Disk+Limits disk limits] so it might ~~be you don't~~ want it. The ''noatime'' option ~~is to increase~~ performance but you will no longer know when files were accessed ~~last time~~.		Note that the ''tagxid'' option is specific for setting up vserver [http://oldwiki.linux-vserver.org/Disk+Limits disk limits] so you might not want it.
			The ''noatime'' option increases performance, but you will no longer know when files were last accessed.

	=== Starting localmount and swap ===		=== Starting localmount and swap ===
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	{{Cmd\|mount /vservers}}		{{Cmd\|mount /vservers}}

	~~Make sure we~~ run ''localmount'' during boot ~~too~~, ~~and that~~ it ~~is done~~ after lvm. In Alpine Linux 1.9 and ~~newer~~ this should not be needed		We need to run ''localmount'' during boot, but it has to happen '''after''' lvm. In Alpine Linux 1.9 and later, this should not be needed

	{{Cmd\|rc-update add localmount boot}}		{{Cmd\|rc-update add localmount boot}}

	~~Or,~~ on Alpine Linux 1.8 or earlier:		on Alpine Linux 1.8 or earlier:

	{{Cmd\|rc_add -s 14 -k localmount}}		{{Cmd\|rc_add -s 14 -k localmount}}
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	rc-update add swap}}		rc-update add swap}}

	~~Or,~~ on Alpine Linux 1.8 or earlier:		on Alpine Linux 1.8 or earlier:
	{{Cmd\|/etc/init.d/swap start		{{Cmd\|/etc/init.d/swap start
	rc_add -s 14 -k swap}}		rc_add -s 14 -k swap}}

Ybizeul: /* Start LVM during Boot */

2020-06-02T13:36:29Z

Start LVM during Boot

← Older revision		Revision as of 13:36, 2 June 2020
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	We want lvm to init the logical volumes during boot. There is a boot service named ''lvm'' to do this. If your volumes are on raid, make sure that ''/etc/init.d/lvm'' is started after mdadm-raid.		We want lvm to init the logical volumes during boot. There is a boot service named ''lvm'' to do this. If your volumes are on raid, make sure that ''/etc/init.d/lvm'' is started after mdadm-raid.

	{{Cmd\|rc-update add lvm}}		{{Cmd\|rc-update add lvm boot}}

	Or, on Alpine Linux 1.8 or earlier:		Or, on Alpine Linux 1.8 or earlier:

Leo: /* Installing LVM software */

2020-02-12T09:06:04Z

Installing LVM software

← Older revision		Revision as of 09:06, 12 February 2020
Line 13:		Line 13:
	We also want it to be loaded during next reboot.		We also want it to be loaded during next reboot.

	{{Cmd\|echo dm-mod >> /etc/modules}}		{{Cmd\|echo dm-mod >> /etc/modules-load.d/dm.conf}}

	We also need the userspace programs.		We also need the userspace programs.

Itoffshore: /* More Info on LVM */

2015-11-04T04:06:09Z

More Info on LVM

← Older revision		Revision as of 04:06, 4 November 2015
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	* the [http://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks] section in the [http://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto]		* the [http://tldp.org/HOWTO/LVM-HOWTO/commontask.html common tasks] section in the [http://tldp.org/HOWTO/LVM-HOWTO/index.html LVM Howto]
			* [http://wiki.alpinelinux.org/wiki/LVM_on_LUKS Alpine wiki page for LVM on LUKS]
	* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]		* [https://wiki.archlinux.org/index.php/LVM Arch wiki page on LVM]
	* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]		* [https://wiki.archlinux.org/index.php/Software_RAID_and_LVM Arch wiki page on RAID and LVM]

Dubiousjim: Fix "Setting up...RAID1" link

2015-01-20T14:34:37Z

Fix "Setting up...RAID1" link

← Older revision		Revision as of 14:34, 20 January 2015
Line 5:		Line 5:
	LVM is collection of programs that allow larger physical disks to be reassembled into "logical" disks that can be shrunk or expanded as data needs change.		LVM is collection of programs that allow larger physical disks to be reassembled into "logical" disks that can be shrunk or expanded as data needs change.

	In this document we will use a [[Setting up a software ~~RAID1~~ array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[Setting up a basic vserver\|vservers ]]		In this document we will use a [[Setting up a software RAID array\|software RAID1 device]] as physical storage for our logical volumes. We will set up a swap partition and a data partition for [[Setting up a basic vserver\|vservers ]]
	=== Installing LVM software ===		=== Installing LVM software ===
	First we need to load the kernel driver, ''dm-mod''		First we need to load the kernel driver, ''dm-mod''