From 409bfa1653f4c4bf096249da31fb09962f812eb4 Mon Sep 17 00:00:00 2001 From: DarkSun Date: Fri, 18 Sep 2020 05:01:38 +0800 Subject: [PATCH] =?UTF-8?q?=E9=80=89=E9=A2=98[tech]:=2020200918=20How=20to?= =?UTF-8?q?=20Extend/Increase=20LVM=E2=80=99s=20(Logical=20Volume=20Resize?= =?UTF-8?q?)=20in=20Linux?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit sources/tech/20200918 How to Extend-Increase LVM-s (Logical Volume Resize) in Linux.md --- ... LVM-s (Logical Volume Resize) in Linux.md | 177 ++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 sources/tech/20200918 How to Extend-Increase LVM-s (Logical Volume Resize) in Linux.md diff --git a/sources/tech/20200918 How to Extend-Increase LVM-s (Logical Volume Resize) in Linux.md b/sources/tech/20200918 How to Extend-Increase LVM-s (Logical Volume Resize) in Linux.md new file mode 100644 index 0000000000..937dbcc744 --- /dev/null +++ b/sources/tech/20200918 How to Extend-Increase LVM-s (Logical Volume Resize) in Linux.md @@ -0,0 +1,177 @@ +[#]: collector: (lujun9972) +[#]: translator: ( ) +[#]: reviewer: ( ) +[#]: publisher: ( ) +[#]: url: ( ) +[#]: subject: (How to Extend/Increase LVM’s (Logical Volume Resize) in Linux) +[#]: via: (https://www.2daygeek.com/extend-increase-resize-lvm-logical-volume-in-linux/) +[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/) + +How to Extend/Increase LVM’s (Logical Volume Resize) in Linux +====== + +Expanding the logical volume is extremely easy, it takes very few steps and can be done online without unmounting a certain logical volume. + +The main purpose of LVM is flexible disk management, which allows you to easily resize, extend and reduce the logical volume size when you need it. + +If you are new to Logical Volume Management (LVM), I suggest you start with our previous article. + + * **Part-1: [How to Create/Configure LVM (Logical Volume Management) in Linux][1]** + + + +![][2] + +Expanding the logical volume involves the below steps. + + * Check if you have sufficient unallocated disk space in the volume group where the LV was residing. + * If yes, you can use that space to extend the logical volume. + * If not, add new disks or LUNs to your system. + * Convert a physical disk as a physical volume (PV). + * Extend the Volume Group + * Increase the logical Volume + * Grow the filesystem + * Check the extended filesystem size + + + +### How to Create LVM Physical Volumes + +Create LVM physical volumes with the pvcreate command. + +Once the disk is detected in the OS, use the pvcreate command to initialize the LVM PV (Physical Volumes). + +``` +# pvcreate /dev/sdc +Physical volume "/dev/sdc" successfully created +``` + +**Make a note:** + + * The above command erases any data on the given disk /dev/sdc. + * Physical disk can be added directly into the LVM PV instead of the disk partition. + + + +Use the pvdisplay command to display the PVs you have created. + +``` +# pvdisplay /dev/sdc + +"/dev/sdc" is a new physical volume of "10.00 GiB" +--- NEW Physical volume --- +PV Name /dev/sdc +VG Name +PV Size 10.00 GiB +Allocatable NO +PE Size 0 +Total PE 0 +Free PE 0 +Allocated PE 0 +PV UUID 69d9dd18-36be-4631-9ebb-78f05fe3217f +``` + +### How to Extend the Volume Group + +Use the following command to add a new physical volume to the existing volume group. + +``` +# vgextend vg01 /dev/sdc +Volume group "vg01" successfully extended +``` + +Use the vgdisplay command to display the PVs you have created. + +``` +# vgdisplay vg01 +--- Volume group --- +VG Name vg01 +System ID +Format lvm2 +Metadata Areas 2 +Metadata Sequence No 1 +VG Access read/write +VG Status resizable +MAX LV 0 +Cur LV 0 +Open LV 0 +Max PV 0 +Cur PV 2 +Act PV 2 +VG Size 14.99 GiB +PE Size 4.00 MiB +Total PE 3840 +Alloc PE / Size 1280 / 4.99 +Free PE / Size 2560 / 9.99 GiB +VG UUID d17e3c31-e2c9-4f11-809c-94a549bc43b7 +``` + +### How to Extend the Logical Volume + +Use the following command to increase the existing logical volume. + +**Common syntax for logical volume extension (lvextend).** + +``` +lvextend [Additional space to be added] [Existing Logical Volume Name] +``` + +Use the below command to increase the existing logical volume additionally to 10GB. + +``` +# lvextend -L +10G /dev/mapper/vg01-lv002 +Rounding size to boundary between physical extents: 5.90 GiB +Size of logical volume vg01/lv002 changed from 5.00 GiB (1280 extents) to 15.00 GiB (3840 extents). +Logical volume var successfully resized +``` + +To extend logical volume using PE size’s. + +``` +# lvextend -l +2560 /dev/mapper/vg01-lv002 +``` + +To extend the logical volume using percentage (%), use the following command. + +``` +# lvextend -l +40%FREE /dev/mapper/vg01-lv002 +``` + +Now, the logical volume is extended and you need to resize the file system to extend the space inside the logical volume. + +For an ext3 and ext4 based file system, run the following command. + +``` +# resize2fs /dev/mapper/vg01-lv002 +``` + +For the xfs file system, use the following command. + +``` +# xfs_growfs /dev/mapper/vg01-lv002 +``` + +Use the **[df command][3]** to view the file system size. + +``` +# df -h /lvmtest1 +Filesystem Size Used Avail Use% Mounted on +/dev/mapper/vg01-lv002 15360M 34M 15326M 4% /lvmtest1 +``` + +-------------------------------------------------------------------------------- + +via: https://www.2daygeek.com/extend-increase-resize-lvm-logical-volume-in-linux/ + +作者：[Magesh Maruthamuthu][a] +选题：[lujun9972][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.2daygeek.com/author/magesh/ +[b]: https://github.com/lujun9972 +[1]: https://www.2daygeek.com/create-lvm-storage-logical-volume-manager-in-linux/ +[2]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 +[3]: https://www.2daygeek.com/linux-check-disk-space-usage-df-command/