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Working with Logical Volumes

Logical Volume Management (LVM) allows block devices such as partitions and raw disks to be grouped together to provide flexible storage on a Linux host. In this hands-on lab, we cover creating physical volumes, grouping them into a volume group, creating logical volumes from the volume group, and creating and mounting file systems on the logical volumes. We also resize logical volumes, create snapshots, and restore snapshots.

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Path Info

Clock icon Intermediate
Clock icon 30m
Clock icon Aug 07, 2020

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Table of Contents

  1. Challenge

    Create Two Logical Volumes Based on the Information Provided in the Instructions

    Once connected via ssh, elevate your privileges to root:

    sudo -i
    1. Create physical volumes out of the following partitions:
    • xvdf1
    • xvdf2
    • xvdf3
    • xvdf4
    1. Create a volume group called user_vg out of the physical volumes.
    2. Create a logical volume named dev_lv that is 200 MB.
    3. Create a logical volume named test_lv that is 64 extents.
  2. Challenge

    Create File Systems on the `dev_lv` and `test_lv` Logical Volumes

    1. Create an ext4 file system on dev_lv.
    2. Create an xfs file system on test_lv.
    3. Create two mount points: /mnt/dev and /mnt/test.
    4. Add entries for dev_lv and test_lv to /etc/fstab.
    5. Mount the dev_lv and test_lv file systems on /mnt/dev and /mnt/test respectively.
  3. Challenge

    Resize the `graphics_lv` and `docs_lv` Logical Volumes

    1. Increase the graphics_lv logical volume by 50 extents.
    2. Shrink the docs_lv logical volume by 100 MB.
  4. Challenge

    Perform a Snapshot of the `prod_lv` Logical Volume and Restore the `stage_snap` Snapshot to Its Origin Volume

    1. Create a snapshot of the prod_lv logical volume called prod_snap that has a size of 50 MB.
    2. Restore the stage_snap snapshot to its origin volume.
    3. Unmount /mnt/staging.
    4. Merge the stage_snap snapshot with its origin volume.

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