LVM操作记录

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LVM映射

初始状态

df -h

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Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       189G   43G  136G  25% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev             16G  4.0K   16G   1% /dev
tmpfs           3.2G  1.2M  3.2G   1% /run
none            5.0M     0  5.0M   0% /run/lock
none             16G  348K   16G   1% /run/shm
none            100M     0  100M   0% /run/user

fdisk -l

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Disk /dev/sda: 239.5 GB, 239511535616 bytes
255 heads, 63 sectors/track, 29118 cylinders, total 467795968 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00037729

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   401545215   200771584   83  Linux
/dev/sda2       401547262   467793919    33123329    5  Extended
Partition 2 does not start on physical sector boundary.
/dev/sda5       401547264   467793919    33123328   82  Linux swap / Solaris

Disk /dev/sdb: 1199.2 GB, 1199168290816 bytes
255 heads, 63 sectors/track, 145790 cylinders, total 2342125568 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
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 40002.3 GB, 40002251653120 bytes
255 heads, 63 sectors/track, 4863330 cylinders, total 78129397760 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/sdc doesn't contain a valid partition table

安装lvm2,xfs

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apt-get install lvm2 xfsprogs

硬盘分区

parted /dev/sdb

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GNU Parted 2.3
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel                                                          
New disk label type? gpt                                                  
(parted) p                                                                
Model: LSI MR9271-8i (scsi)
Disk /dev/sdb: 1199GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start  End  Size  File system  Name  Flags

(parted) mkpart                                                           
Partition name?  []?                                                      
File system type?  [ext2]? xfs                                            
Start? 1                                                                  
End? -1                                                                   
(parted) p                                                                
Model: LSI MR9271-8i (scsi)
Disk /dev/sdb: 1199GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  1199GB  1199GB

(parted)

parted /dev/sdc

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GNU Parted 2.3
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel                                                          
New disk label type? gpt                                                  
(parted) mkpart                                                           
Partition name?  []?                                                      
File system type?  [ext2]? xfs
Start? 1                                                                  
End? -1                                                                   
(parted) p                                                                
Model: LSI MR9271-8i (scsi)
Disk /dev/sdc: 40.0TB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt

Number  Start   End     Size    File system  Name  Flags
 1      1049kB  40.0TB  40.0TB

(parted)

此时状态fdisk -l

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Disk /dev/sda: 239.5 GB, 239511535616 bytes
255 heads, 63 sectors/track, 29118 cylinders, total 467795968 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00037729

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   401545215   200771584   83  Linux
/dev/sda2       401547262   467793919    33123329    5  Extended
Partition 2 does not start on physical sector boundary.
/dev/sda5       401547264   467793919    33123328   82  Linux swap / Solaris

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdb: 1199.2 GB, 1199168290816 bytes
255 heads, 63 sectors/track, 145790 cylinders, total 2342125568 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
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1  2342125567  1171062783+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdc: 40002.3 GB, 40002251653120 bytes
255 heads, 63 sectors/track, 4863330 cylinders, total 78129397760 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1  4294967295  2147483647+  ee  GPT
Partition 1 does not start on physical sector boundary.

创建PV

pvcreate /dev/sdb1

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Physical volume "/dev/sdb1" successfully created

pvcreate /dev/sdc1

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Physical volume "/dev/sdc1" successfully created

此时状态pvdisplay

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"/dev/sdb1" is a new physical volume of "1.09 TiB"
--- NEW Physical volume ---
PV Name               /dev/sdb1
VG Name               
PV Size               1.09 TiB
Allocatable           NO
PE Size               0   
Total PE              0
Free PE               0
Allocated PE          0
PV UUID               caU0nX-H3jF-X7AU-HwNW-SFU9-oVHk-Rubb0B
 
"/dev/sdc1" is a new physical volume of "36.38 TiB"
--- NEW Physical volume ---
PV Name               /dev/sdc1
VG Name               
PV Size               36.38 TiB
Allocatable           NO
PE Size               0   
Total PE              0
Free PE               0
Allocated PE          0
PV UUID               OWy9rl-M7sA-oIx0-IwNZ-dJ5L-dHjj-Y2Ddbo

创建VG

初始vgcreate vg61 /dev/sdb1

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Volume group "vg61" successfully created

追加vgextend vg61 /dev/sdc1

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Volume group "vg61" successfully extended

此时状态vgdisplay

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--- Volume group ---
VG Name               vg61
System ID             
Format                lvm2
Metadata Areas        2
Metadata Sequence No  2
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               37.47 TiB
PE Size               4.00 MiB
Total PE              9823182
Alloc PE / Size       0 / 0   
Free  PE / Size       9823182 / 37.47 TiB
VG UUID               p8E1eC-6frE-2lf1-pai6-50lT-C5Fa-zuvVsB

创建LV

lvcreate --name aidata -L 2T vg61

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Logical volume "aidata" created

此时状态lvdisplay

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--- Logical volume ---
LV Path                /dev/vg61/aidata
LV Name                aidata
VG Name                vg61
LV UUID                407s46-Tv9S-u9Ds-1uWF-dZUm-NfCD-0kUFOL
LV Write Access        read/write
LV Creation host, time ubuntu, 2017-07-05 15:15:29 +0800
LV Status              available
# open                 0
LV Size                2.00 TiB
Current LE             524288
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           252:0

格式化mkfs.xfs /dev/vg61/aidata

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meta-data=/dev/vg61/aidata       isize=256    agcount=32, agsize=16777216 blks
         =                       sectsz=4096  attr=2, projid32bit=0
data     =                       bsize=4096   blocks=536870912, imaxpct=5
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal log           bsize=4096   blocks=262144, version=2
         =                       sectsz=4096  sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

挂载

mkdir /aidata

mount /dev/vg61/aidata /aidata/

此时状态df -h

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Filesystem               Size  Used Avail Use% Mounted on
/dev/sda1                189G   43G  136G  25% /
none                     4.0K     0  4.0K   0% /sys/fs/cgroup
udev                      16G  4.0K   16G   1% /dev
tmpfs                    3.2G  1.2M  3.2G   1% /run
none                     5.0M     0  5.0M   0% /run/lock
none                      16G  348K   16G   1% /run/shm
none                     100M     0  100M   0% /run/user
/dev/mapper/vg61-aidata  2.0T   71M  1.9T   1% /aidata

扩展LV

lvextend -L +18T /dev/vg61/aidata

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Extending logical volume aidata to 20.00 TiB
Logical volume aidata successfully resized

此时状态lvdisplay

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--- Logical volume ---
LV Path                /dev/vg61/aidata
LV Name                aidata
VG Name                vg61
LV UUID                407s46-Tv9S-u9Ds-1uWF-dZUm-NfCD-0kUFOL
LV Write Access        read/write
LV Creation host, time ubuntu, 2017-07-05 15:15:29 +0800
LV Status              available
# open                 1
LV Size                20.00 TiB
Current LE             5242880
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           252:0

xfs_growfs xfs_growfs /aidata/

其他类型resize2fs /dev/vg/123

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meta-data=/dev/mapper/vg61-aidata isize=256    agcount=32, agsize=16777216 blks
         =                       sectsz=4096  attr=2
data     =                       bsize=4096   blocks=536870912, imaxpct=5
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal               bsize=4096   blocks=262144, version=2
         =                       sectsz=4096  sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 536870912 to 5368709120

此时状态df -h

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Filesystem               Size  Used Avail Use% Mounted on
/dev/sda1                189G   43G  136G  25% /
none                     4.0K     0  4.0K   0% /sys/fs/cgroup
udev                      16G  4.0K   16G   1% /dev
tmpfs                    3.2G  1.2M  3.2G   1% /run
none                     5.0M     0  5.0M   0% /run/lock
none                      16G  348K   16G   1% /run/shm
none                     100M     0  100M   0% /run/user
/dev/mapper/vg61-aidata   20T   46M   20T   1% /aidata

永久挂载

减小home，增大root

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umount /home
lvreduce /dev/dap104-vg/home -L -180G
mkfs.ext4 /dev/dap104-vg/home
e2fsck -fy /dev/dap104-vg/home
mount /dev/dap104-vg/home
lvextend -L +180G /dev/dap104-vg/root
resize2fs /dev/dap104-vg/root