LoginSignup
0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 5 years have passed since last update.

@tukiyo3

LVMに空きパーティション追加

Last updated at Posted at 2015-12-13

目的

  • CloudAtCostのDebianがLVMでインストールされていた。
    • /dev/sda3が既存のLVM(8.6G)
    • /dev/sda1(237M)と/dev/sda2(954M)を削除し、
    • /dev/sda1(1.3G)を作成し既存のLVMに追加したい(8.6G+1.3G=>9.8G)

参考

現状確認

# df -h /dev/dm-0
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       8.6G  1.4G  6.8G  18% /

# fdisk -l /dev/sda

Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0001cb21

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1  *        2048   487423   485376  237M 83 Linux
/dev/sda2         487424  2441215  1953792  954M 82 Linux swap / Solaris
/dev/sda3        2441216 20969471 18528256  8.9G 8e Linux LVM
/dev/sda4       20969472 20971519     2048    1M 8e Linux LVM

swap off

# swapoff /dev/sda2
  • /etc/fstabのswap削除

/dev/sda1,2を削除

# fdisk /dev/sda

Welcome to fdisk (util-linux 2.25.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p
Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0001cb21

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1  *        2048   487423   485376  237M 83 Linux
/dev/sda2         487424  2441215  1953792  954M 82 Linux swap / Solaris
/dev/sda3        2441216 20969471 18528256  8.9G 8e Linux LVM
/dev/sda4       20969472 20971519     2048    1M 8e Linux LVM


Command (m for help): d
Partition number (1-4, default 4): 1

Partition 1 has been deleted.

Command (m for help): d
Partition number (2-4, default 4): 2

Partition 2 has been deleted.

Command (m for help): p
Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0001cb21

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda3        2441216 20969471 18528256  8.9G 8e Linux LVM
/dev/sda4       20969472 20971519     2048    1M 8e Linux LVM


Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

# reboot

/dev/sda1作成

/dev/sda1作成
# fdisk /dev/sda

Welcome to fdisk (util-linux 2.25.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): n
Partition type
   p   primary (2 primary, 0 extended, 2 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1,2, default 1): 
First sector (2048-20971519, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-2441215, default 2441215): 

Created a new partition 1 of type 'Linux' and of size 1.2 GiB.

Command (m for help): t
Partition number (1,3,4, default 4): 1
Hex code (type L to list all codes): 8e

Changed type of partition 'Linux' to 'Linux LVM'.

Command (m for help): p
Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0001cb21

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1           2048  2441215  2439168  1.2G 8e Linux LVM
/dev/sda3        2441216 20969471 18528256  8.9G 8e Linux LVM
/dev/sda4       20969472 20971519     2048    1M 8e Linux LVM


Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

# reboot

pvcreate

# fdisk -l /dev/sda

Disk /dev/sda: 10 GiB, 10737418240 bytes, 20971520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0001cb21

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1           2048  2441215  2439168  1.2G 8e Linux LVM
/dev/sda3        2441216 20969471 18528256  8.9G 8e Linux LVM
/dev/sda4       20969472 20971519     2048    1M 8e Linux LVM

# pvdisplay -v
    DEGRADED MODE. Incomplete RAID LVs will be processed.
    Scanning for physical volume names
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               vg_cac
  PV Size               8.83 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              2261
  Free PE               0
  Allocated PE          2261
  PV UUID               gjBdEp-9uoK-Hnxo-9isu-Hi30-3ZZ3-lzdY3b
   
# pvscan
  PV /dev/sda3   VG vg_cac   lvm2 [8.83 GiB / 0    free]
  Total: 1 [8.83 GiB] / in use: 1 [8.83 GiB] / in no VG: 0 [0   ]
# pvcreate /dev/sda1
  Physical volume "/dev/sda1" successfully created
# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "vg_cac" using metadata type lvm2

# vgextend vg_cac /dev/sda1
  Volume group "vg_cac" successfully extended
# df -h /dev/dm-0
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       8.6G  1.3G  6.9G  16% /
# vgdisplay 
  --- Volume group ---
  VG Name               vg_cac
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               9.99 GiB
  PE Size               4.00 MiB
  Total PE              2558
  Alloc PE / Size       2261 / 8.83 GiB
  Free  PE / Size       297 / 1.16 GiB
  VG UUID               AlBirr-duAr-Mwzy-JYtP-rhgG-T7y4-C6LR09

lvextend

# lvextend -l +297 /dev/vg_cac/root_cac
  Size of logical volume vg_cac/root_cac changed from 8.83 GiB (2261 extents) to 9.99 GiB (2558 extents).
  Logical volume root_cac successfully resized
# df -h /dev/dm-0
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       8.6G  1.3G  6.9G  16% /

resize2fs

# resize2fs /dev/vg_cac/root_cac
resize2fs 1.42.12 (29-Aug-2014)
Filesystem at /dev/vg_cac/root_cac is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/vg_cac/root_cac is now 2619392 (4k) blocks long.

# df -h /dev/dm-0
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0       9.8G  1.3G  8.0G  14% /

完成

0
0
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
Sign upLogin
0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?