LVM 기반 Ubuntu Disk 확장

Written By whchoi / 2018-04-23

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1.LVM 볼륨 확인

df를 통한 확인

root@Ubuntuv16Repo19:~# df -h Filesystem                                   Size  Used Avail Use% Mounted on udev                                         3.9G     0  3.9G   0% /dev tmpfs                                        799M  9.0M  790M   2% /run /dev/mapper/Ubuntu--v16--64bit--VM--vg-root   78G  2.1G   72G   3% / tmpfs                                        3.9G     0  3.9G   0% /dev/shm tmpfs                                        5.0M     0  5.0M   0% /run/lock tmpfs                                        3.9G     0  3.9G   0% /sys/fs/cgroup /dev/sda1                                    472M   58M  390M  13% /boot tmpfs                                        799M     0  799M   0% /run/user/1000

# 현재 80GB 할당 중.

fdisk를 통한 확인.

root@Ubuntuv16Repo19:~# fdisk /dev/sda Welcome to fdisk (util-linux 2.27.1). 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: 300 GiB, 322122547200 bytes, 629145600 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: 0x79a815f8 Device     Boot   Start       End   Sectors  Size Id Type /dev/sda1  *       2048    999423    997376  487M 83 Linux /dev/sda2       1001470 167770111 166768642 79.5G  5 Extended /dev/sda5       1001472 167770111 166768640 79.5G 8e Linux LVM

# 300GB 할당 디스크 가운데 , 현재 LVM을 통해 80GB만 할당되어 있음

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2.Volume Group 확인

vgs를 통한 확인

root@Ubuntuv16Repo19:~# vgs VG                     #PV #LV #SN Attr   VSize  VFree Ubuntu-v16-64bit-VM-vg   1   2   0 wz--n- 79.52g    0 root@Ubuntuv16Repo19:~# vgdisplay --- Volume group --- VG Name               Ubuntu-v16-64bit-VM-vg System ID              Format                lvm2 Metadata Areas        1 Metadata Sequence No  3 VG Access             read/write VG Status             resizable MAX LV                0 Cur LV                2 Open LV               1 Max PV                0 Cur PV                1 Act PV                1 VG Size               79.52 GiB PE Size               4.00 MiB Total PE              20357 Alloc PE / Size       20357 / 79.52 GiB Free  PE / Size       0 / 0    VG UUID               QYkJFz-milF-G9Ez-e1CN-V0aB-pzII-JDkFBH

# VG Name "Ubuntu-v16-64bit-VM-vg" 으로 80GB 할당되어 있음

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3.현재 볼륨 구성확인 

pvs (Physical Volume) 를 통한 확인

root@Ubuntuv16Repo19:~# pvs PV         VG                     Fmt  Attr PSize  PFree /dev/sda5  Ubuntu-v16-64bit-VM-vg lvm2 a--  79.52g    0 root@Ubuntuv16Repo19:~# pvdisplay --- Physical volume --- PV Name               /dev/sda5 VG Name               Ubuntu-v16-64bit-VM-vg PV Size               79.52 GiB / not usable 2.00 MiB Allocatable           yes (but full) PE Size               4.00 MiB Total PE              20357 Free PE               0 Allocated PE          20357 PV UUID               fNsS81-hOFx-jCBV-QL30-VjIG-g0Yh-J7ij3S

# pvs 는 /dev/sad5 할당, VG는 ""Ubuntu-v16-64bit-VM-vg"로 할당되어 있음.

lvs(Logical Volume) 를 통한 확인

root@Ubuntuv16Repo19:~# lvs LV     VG                     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert  root   Ubuntu-v16-64bit-VM-vg -wi-ao----  78.56g                                                  swap_1 Ubuntu-v16-64bit-VM-vg -wi-a----- 980.00m                                                     root@Ubuntuv16Repo19:~# lvdisplay --- Logical volume --- LV Path                /dev/Ubuntu-v16-64bit-VM-vg/root LV Name                root VG Name                Ubuntu-v16-64bit-VM-vg LV UUID                qCvyzI-rjAM-V8ie-Y6UR-iLlS-5Gl7-tt9FCr LV Write Access        read/write LV Creation host, time Ubuntu-v16-64bit-VM, 2018-04-20 23:48:41 +0900 LV Status              available # open                 1 LV Size                78.56 GiB Current LE             20112 Segments               1 Allocation             inherit Read ahead sectors     auto - currently set to     256 Block device           252:0 --- Logical volume --- LV Path                /dev/Ubuntu-v16-64bit-VM-vg/swap_1 LV Name                swap_1 VG Name                Ubuntu-v16-64bit-VM-vg LV UUID                ZFIHe8-xHsG-zjIc-T0kL-JQ9x-41Pc-TIkqeL LV Write Access        read/write LV Creation host, time Ubuntu-v16-64bit-VM, 2018-04-20 23:48:41 +0900 LV Status              available # open                 0 LV Size                980.00 MiB Current LE             245 Segments               1 Allocation             inherit Read ahead sectors     auto - currently set to     256 Block device           252:1

# LVS 내부에는 root와 swap_1 로 2개의 LV가 할당되어 있음.

# root는 78.56GB, swap은 980MB가 할당되어 있음.

VGS (Volume Group) 확인

root@Ubuntuv16Repo19:~# vgs   VG                     #PV #LV #SN Attr   VSize  VFree   Ubuntu-v16-64bit-VM-vg   1   2   0 wz--n- 79.52g    0 root@Ubuntuv16Repo19:~# vgdisplay   --- Volume group ---   VG Name               Ubuntu-v16-64bit-VM-vg   System ID                Format                lvm2   Metadata Areas        1   Metadata Sequence No  3   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               1   Max PV                0   Cur PV                1   Act PV                1   VG Size               79.52 GiB   PE Size               4.00 MiB   Total PE              20357   Alloc PE / Size       20357 / 79.52 GiB   Free  PE / Size       0 / 0      VG UUID               QYkJFz-milF-G9Ez-e1CN-V0aB-pzII-JDkFBH

# VGS에서도 위의 PV,LV 등의 내용을 확인 가능함.

fdisk를 통한 현재 볼륨 구성 확인

root@Ubuntuv16Repo19:~# fdisk /dev/sda Welcome to fdisk (util-linux 2.27.1). 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: 300 GiB, 322122547200 bytes, 629145600 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: 0x79a815f8 Device     Boot   Start       End   Sectors  Size Id Type /dev/sda1  *       2048    999423    997376  487M 83 Linux /dev/sda2       1001470 167770111 166768642 79.5G  5 Extended /dev/sda5       1001472 167770111 166768640 79.5G 8e Linux LVM

# fdisk를 통해 현재 LVM 구성 확인.                                                 

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4.새로운 Physical Partition 생성   

fdisk 기반 신규 Partition 생성

root@Ubuntuv16Repo19:~# fdisk /dev/sda Command (m for help): p Disk /dev/sda: 300 GiB, 322122547200 bytes, 629145600 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: 0x79a815f8 Device     Boot   Start       End   Sectors  Size Id Type /dev/sda1  *       2048    999423    997376  487M 83 Linux /dev/sda2       1001470 167770111 166768642 79.5G  5 Extended /dev/sda5       1001472 167770111 166768640 79.5G 8e Linux LVM Command (m for help): n Partition type    p   primary (1 primary, 1 extended, 2 free)    l   logical (numbered from 5) Select (default p): p Partition number (3,4, default 3): First sector (999424-629145599, default 999424): 167770111 Sector 167770111 is already allocated. First sector (167770112-629145599, default 167770112): 167770112   Last sector, +sectors or +size{K,M,G,T,P} (167770112-629145599, default 629145599): # 현재 /dev/sda5 LVM의 End Sector 값의 다음을 설정 Created a new partition 3 of type 'Linux' and of size 220 GiB. Command (m for help): t Partition number (1-3,5, default 5): 3 Partition type (type L to list all types): L 8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt          Partition type (type L to list all types): 8e Changed type of partition 'Linux' to 'Linux LVM'. # 파티션을 Linux에서 LVM으로 변경 Command (m for help): p Disk /dev/sda: 300 GiB, 322122547200 bytes, 629145600 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: 0x79a815f8 Device     Boot     Start       End   Sectors  Size Id Type /dev/sda1  *         2048    999423    997376  487M 83 Linux /dev/sda2         1001470 167770111 166768642 79.5G  5 Extended /dev/sda3       167770112 629145599 461375488  220G 8e Linux LVM /dev/sda5         1001472 167770111 166768640 79.5G 8e Linux LVM Partition table entries are not in disk order. # 추가된 LVM 확인 (파티션 번호 '3'으로 추가) Command (m for help): w # fdisk 변경 값 저장 init 6 # System Rebooting

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5.LVM 기반 PV(Physical Volume) 생성

Physical Volume 생성

root@Ubuntuv16Repo19:~# pvcreate /dev/sda3   Physical volume "/dev/sda3" successfully created # 신규 생성된 /dev/sd3 볼륨을 PV로 생성  root@Ubuntuv16Repo19:~# pvs   PV         VG                     Fmt  Attr PSize   PFree     /dev/sda3                         lvm2 ---  220.00g 220.00g   /dev/sda5  Ubuntu-v16-64bit-VM-vg lvm2 a--   79.52g      0 root@Ubuntuv16Repo19:~# pvdisplay   --- Physical volume ---   PV Name               /dev/sda5   VG Name               Ubuntu-v16-64bit-VM-vg   PV Size               79.52 GiB / not usable 2.00 MiB   Allocatable           yes (but full)   PE Size               4.00 MiB   Total PE              20357   Free PE               0   Allocated PE          20357   PV UUID               fNsS81-hOFx-jCBV-QL30-VjIG-g0Yh-J7ij3S       "/dev/sda3" is a new physical volume of "220.00 GiB"   --- NEW Physical volume ---   PV Name               /dev/sda3   VG Name                  PV Size               220.00 GiB   Allocatable           NO   PE Size               0      Total PE              0   Free PE               0   Allocated PE          0   PV UUID               ZyALee-fVTR-w5lP-qjLY-LePd-8mfH-4hRR6f

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6.LVM Volume Group 확장. 

vgextend를 통한 VG 확장 (VG는 "pvdisplay"를 통해 확인 가능)

root@Ubuntuv16Repo19:~# vgextend Ubuntu-v16-64bit-VM-vg /dev/sda3   Volume group "Ubuntu-v16-64bit-VM-vg" successfully extended # 80G로 구성된 "Ubuntu-v16-64bit-VM-vg" volume group을 Physical Volume /dev/sda3로 확장함. root@Ubuntuv16Repo19:~# vgs   VG                     #PV #LV #SN Attr   VSize   VFree     Ubuntu-v16-64bit-VM-vg   2   2   0 wz--n- 299.52g 220.00g root@Ubuntuv16Repo19:~# vgdisplay   --- Volume group ---   VG Name               Ubuntu-v16-64bit-VM-vg   System ID                Format                lvm2   Metadata Areas        2   Metadata Sequence No  4   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                2   Act PV                2   VG Size               299.52 GiB   PE Size               4.00 MiB   Total PE              76677   Alloc PE / Size       20357 / 79.52 GiB   Free  PE / Size       56320 / 220.00 GiB   VG UUID               QYkJFz-milF-G9Ez-e1CN-V0aB-pzII-JDkFBH

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7.LVM(Logical Volume)의 확장 

lvextend를 통해 Free Size "220GB"를 Physical Volume으로 확장

root@Ubuntuv16Repo19:~# lvextend -L+220G /dev/Ubuntu-v16-64bit-VM-vg/root /dev/sda3   Size of logical volume Ubuntu-v16-64bit-VM-vg/root changed from 78.56 GiB (20112 extents) to 298.56 GiB (76432 extents).   Logical volume root successfully resized. # /dev/Ubuntu-v16-64bit-VM-vg/root를 Physical Volume /dev/sda3로 확장함. root@Ubuntuv16Repo19:~# lvs   LV     VG                     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert   root   Ubuntu-v16-64bit-VM-vg -wi-ao---- 298.56g                                                       swap_1 Ubuntu-v16-64bit-VM-vg -wi-ao---- 980.00m                    root@Ubuntuv16Repo19:~# resize2fs /dev/Ubuntu-v16-64bit-VM-vg/root resize2fs 1.42.13 (17-May-2015) Filesystem at /dev/Ubuntu-v16-64bit-VM-vg/root is mounted on /; on-line resizing required old_desc_blocks = 5, new_desc_blocks = 19 The filesystem on /dev/Ubuntu-v16-64bit-VM-vg/root is now 78266368 (4k) blocks long. # resize2fs를 통해 mount 및 on line resizing 구성.

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8.최종 구성된 Volunme 확인 

root@Ubuntuv16Repo19:~# df -h Filesystem                                   Size  Used Avail Use% Mounted on udev                                         3.9G     0  3.9G   0% /dev tmpfs                                        799M  9.0M  790M   2% /run /dev/mapper/Ubuntu--v16--64bit--VM--vg-root  294G  2.1G  279G   1% / tmpfs                                        3.9G     0  3.9G   0% /dev/shm tmpfs                                        5.0M     0  5.0M   0% /run/lock tmpfs                                        3.9G     0  3.9G   0% /sys/fs/cgroup /dev/sda1                                    472M   58M  390M  13% /boot tmpfs                                        799M     0  799M   0% /run/user/1000