Manage Logical Volume in RHEL - RHCSA (RH134).pdf
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The document outlines the logical volume management (LVM) system, which simplifies storage management by enabling flexible resizing and allocation of disk space. It details the creation and management of physical volumes, volume groups, and logical volumes, with step-by-step commands for setting up and extending LVM partitions. The instructions also include prerequisites and commands for creating physical volumes, volume groups, and managing logical volumes effectively.
Manage Logical Volume in RHEL - RHCSA (RH134).pdf
- 2. Logical Volume Management(LVM) Abstracts physical storage, enabling the creation of flexible logical volumes Purpose: Simplify storage management by allowing easy resizing and allocation of disk space Source: 1.3. LVM Architecture Overview | Red Hat Product Documentation
- 3. ● Physical Volumes (PVs): Actual disks or partitions ● Volume Groups (VGs): Collection of physical volumes combined into a single storage pool which can be managed together ● Logical Volumes (LVs): Virtual partitions created from the volume group which are used by the operating system Components of LVM
- 4. Source: Volume Management (helios.de)
- 5. Add Disk and Create LVM Partition Pre-requisite: Create a partition on a disk before following these commands Step 1: Change the partition type from ‘Linux’ to ‘Linux LVM’ just after partition is created ● Command: t ‘8e’ Note: (‘8e’ is hex code associated with LVM)
- 6. Step 2: Install the 'lvm2' package on the machine ● Command: yum install lvm2 Step 3: Create the physical volume ● Command: pvcreate <partition-name>
- 7. Step 4: Create the volume group ● Command: vgcreate <volume-group-name> <partition-name>
- 8. Step 5: Create the logical volume ● Command: lvcreate-n <logical-volume-name>--size <size> <volume-group-name>
- 9. Step 6: Format this disk and assign file system to it ● Command: mkfs.xfs <logical-volume-path> Step 7: Mount this disk to a drive ● Command: mount <logical-volume-path> <directory-name>
- 10. Extend existing disk using LVM Pre-requisite: Create another disk partition (type: linux > linux LVM) Extend existing volume group to new partition ● Command: vgextend <existing-volume-group> <partition-name>
- 11. Extend the logical volume ● Command: lvextend-L+<size-to-extend> <logical-volume-path> Extend the file system ● Command: xfs_growfs <logical-volume-path>