Setup LVM On Linux Install

2 minute read

Description:

Setup LVM with LUKS Multi-Disk. For this lab I used 2 127 GB vhd’s using Hyper-V and Fedora 25 Gnome.

To Resolve:

  1. Launch installer via Live USB image

  2. Select all your disks and choose the option to “encrypt my data” as well as “I will configure partitioning”.

    • setup-lvm

  3. Click “done” and then enter the passphrase for your setup.

  4. Now on the next screen, we configure our disks:

    • Rules

    • boot partition = /boot needs to be at least 250MB.
    • swap needs to be 1024 MB+ (for a 4GB VM). For best results, follow:
    Amount of RAM in the System Recommended Amount of Swap Space
    4GB of RAM or less a minimum of 2GB of swap space
    4GB to 16GB of RAM a minimum of 4GB of swap space
    16GB to 64GB of RAM a minimum of 8GB of swap space
    64GB to 256GB of RAM a minimum of 16GB of swap space
    256GB to 512GB of RAM a minimum of 32GB of swap space

    Source

    • Paths reference:
    • /home = lvm ext4
    • /boot/ EFI standard EFI system partition 260mb
    • / ext4 volumb group
    • /swap

  5. Now we just create them - Create boot:

    • setup-lvm-2
  6. Create vg
    • setup-lvm-3
  7. Create root
    • setup-lvm-4
  8. Create swap
    • setup-lvm-6
  9. Create home

    • setup-lvm-7

    • And then we are done! Finish the installer.

Command Line Method:

Here is how to do it from command line although I haven’t actually done this. Steps to complete = Create physical volume, then volume groups, then logical volumes.

  1. First we want to see our current disk setup:

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    # Identify free disks
lsblk
pydf
blkid
fdisk -l

  2. Now we create a logical volume. Note that the disk should be blank.

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    fdisk /dev/sdb

n - new part
p - primary part
1 - first part on disk
t - change type
8e - lvm
p - preview
w - write changes

# Do same thing for each disk

  3. Now we create the disk:

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    pvcreate /dev/sdb1
#could also do pvcreate /dev/sdb1, /dev/sdb2 …

  4. Now create the Volume Group

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    vgcreate vgpool /dev/sdb1

# Could also do pvcreate /dev/sdb1, /dev/sdb2 …

lvcreate -L 3G -n lvstuff vgpool

# -L is size, -n is name, and vgpool is mentioned so that lvcreate knows where to get the space from

  5. Create a filesystem

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    mkfs -t ext3 /dev/vgpool/lvstuff - creates a file system

  6. Mount it

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    mkdir /mnt/stuff

mount -t ext3 /dev/vgpool/lvstuff /mnt/stuff

# Adding a new hard drive:

vgextend vgpool /dev/sdc1

# Tell it how much to extend by, should be 3+8 but really extends to 8.
lvextend -L +8G /dev/vgpool/lvstuff

# Actually expands to 11 GB instead of 8.
# lvextend -L+3G /dev/vgpool/lvstuff

# Now we extend our filesystem:

resize2fs /dev/vgpool/lvstuff

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