當我重新啟動並嘗試使用時，我使用 Gparted Live cd 來調整磁碟區組和邏輯分割區的大小，lvextend –l +100%FREE /dev/vda5我收到此訊息：
Path required for Logical Volume "–l"
Please provide a volume group name
Run `lvextend --help' for more information.
這是我pvs的lvs輸出vgs：
VG #PV #LV #SN Attr VSize VFree
d8dev-vg 1 2 0 wz--n- 9.76g 5.01g
PV VG Fmt Attr PSize PFree
/dev/vda5 d8dev-vg lvm2 a-- 9.76g 5.01g
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
root d8dev-vg -wi-ao--- 3.75g
swap_1 d8dev-vg -wi-ao--- 1020.00m
這是df -h輸出
Filesystem Size Used Avail Use% Mounted on
udev 487M 4.0K 487M 1% /dev
tmpfs 100M 632K 99M 1% /run
/dev/dm-0 3.7G 3.2G 325M 91% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 498M 184K 497M 1% /run/shm
none 100M 0 100M 0% /run/user
/dev/vda1 236M 37M 188M 17% /boot
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/a5516e7a4136a510a3b6b388a57b266067cce4b2240db77a859910d3c741f988
shm 64M 0 64M 0% /var/lib/docker/containers/f5c852ead8bd3578b63fd5a259586c5a9c4b375b8505bb339e9f3c27cabc130f/shm
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/074360c189d2dae1477d9eeed419a86880355cab68c266155eb649aaee9e80ff
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/921ae5230e127989f8f12ecbd52a454965ed385531397fc46cfc5a82392ec876
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/eda6cf31040113c7216c4e07071596c724288071a94869b3606e90ea9fdc6034
shm 64M 0 64M 0% /var/lib/docker/containers/27d44748763ef03fea24464e11dde5498329ce438002812cc5168379825c5003/shm
shm 64M 0 64M 0% /var/lib/docker/containers/7a79506bb707843b3eea9d062f934e5f53a8ca72326a497559b0cd391f5f271b/shm
shm 64M 0 64M 0% /var/lib/docker/containers/78fbe6d2bccc7d29f08051a9ab4d2f02b0794fd7a95e28446e208184fa84b149/shm
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/d06efbeda0bcf8352e88aa078d23caf3855ae14dbd9100980c3431dfce5870a7
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/10dd1eb657163fb314d1fd5e7951645e957365b9760b46846491c8374e106039
shm 64M 0 64M 0% /var/lib/docker/containers/90a5ef4a9a761778fbad4bd052426263f5fe14d5248aaf7cdecd87013fb2c706/shm
shm 64M 0 64M 0% /var/lib/docker/containers/dd20465dc2764916efb2d29887dfe76d3bf8cf823b9e032d7ec399aa40dc083f/shm
none 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/966dc571c622e09757ceebbfefd540a6ab4b27922b2fbab8615277e343a67357
shm 64M 0 64M 0% /var/lib/docker/containers/312cceb4eb20613ad493df37097ab47a204da19669c3aa065feb7fc9818c126c/shm
我嘗試過這個命令
lvextend –l +100%FREE /dev/vda5
lvextend –l +100%FREE d8dev-vg
lvextend –l +100%FREE /dev/root
但所有輸出都相同
Path required for Logical Volume "–l"
Please provide a volume group name
編輯 ：我lvextend /dev/dm-0 /dev/vda5現在的lvs輸出是：
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
root d8dev-vg -wi-ao--- 8.76g
swap_1 d8dev-vg -wi-ao--- 1020.00m
但/dev/dm-0仍然很低：
Filesystem Size Used Avail Use% Mounted on
udev 487M 4.0K 487M 1% /dev
tmpfs 100M 632K 99M 1% /run
/dev/dm-0 3.7G 3.2G 325M 91% /
編輯2：vgdisplay和lvdisplay：
--- Volume group ---
VG Name d8dev-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 9.76 GiB
PE Size 4.00 MiB
Total PE 2498
Alloc PE / Size 2498 / 9.76 GiB
Free PE / Size 0 / 0
VG UUID AGVHqT-IO1R-l3uB-AeN4-q62b-z33r-b4NwS7
--- Logical volume ---
LV Path /dev/d8dev-vg/root
LV Name root
VG Name d8dev-vg
LV UUID qet8dK-Izh1-uJul-2T0R-rDyy-ONNH-Xwvs2h
LV Write Access read/write
LV Creation host, time d8dev, 2016-05-19 08:17:01 -0700
LV Status available
# open 1
LV Size 8.76 GiB
Current LE 2243
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/d8dev-vg/swap_1
LV Name swap_1
VG Name d8dev-vg
LV UUID 4mbhDG-PmAN-Fym3-yXSI-gRkd-owki-eYqWqj
LV Write Access read/write
LV Creation host, time d8dev, 2016-05-19 08:17:01 -0700
LV Status available
# open 2
LV Size 1020.00 MiB
Current LE 255
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
DF-Th
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 487M 4.0K 487M 1% /dev
tmpfs tmpfs 100M 632K 99M 1% /run
/dev/dm-0 ext4 3.7G 3.2G 325M 91% /
none tmpfs 4.0K 0 4.0K 0% /sys/fs/cgroup
none tmpfs 5.0M 0 5.0M 0% /run/lock
none tmpfs 498M 184K 497M 1% /run/shm
none tmpfs 100M 0 100M 0% /run/user
/dev/vda1 ext2 236M 37M 188M 17% /boot
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/a5516e7a4136a510a3b6b388a57b266067cce4b2240db77a859910d3c741f988
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/f5c852ead8bd3578b63fd5a259586c5a9c4b375b8505bb339e9f3c27cabc130f/shm
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/074360c189d2dae1477d9eeed419a86880355cab68c266155eb649aaee9e80ff
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/921ae5230e127989f8f12ecbd52a454965ed385531397fc46cfc5a82392ec876
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/eda6cf31040113c7216c4e07071596c724288071a94869b3606e90ea9fdc6034
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/27d44748763ef03fea24464e11dde5498329ce438002812cc5168379825c5003/shm
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/7a79506bb707843b3eea9d062f934e5f53a8ca72326a497559b0cd391f5f271b/shm
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/78fbe6d2bccc7d29f08051a9ab4d2f02b0794fd7a95e28446e208184fa84b149/shm
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/d06efbeda0bcf8352e88aa078d23caf3855ae14dbd9100980c3431dfce5870a7
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/10dd1eb657163fb314d1fd5e7951645e957365b9760b46846491c8374e106039
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/90a5ef4a9a761778fbad4bd052426263f5fe14d5248aaf7cdecd87013fb2c706/shm
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/dd20465dc2764916efb2d29887dfe76d3bf8cf823b9e032d7ec399aa40dc083f/shm
none aufs 3.7G 3.2G 325M 91% /var/lib/docker/aufs/mnt/966dc571c622e09757ceebbfefd540a6ab4b27922b2fbab8615277e343a67357
shm tmpfs 64M 0 64M 0% /var/lib/docker/containers/312cceb4eb20613ad493df37097ab47a204da19669c3aa065feb7fc9818c126c/shm
答案1
使用 LVM（邏輯磁碟區管理器）時，您應該記住操作順序是必須的。如果您不遵守該命令，您將面臨遺失資料的風險。
如果您已經有PV（實體磁碟區）和VG（磁碟區組），則透過新增其他裝置來擴充磁碟區組會更容易。
若要擴充磁碟區組，例如，vg1您可以執行下列操作：
vgextend vg1 /dev/vda5
擴展卷組後，我們需要調整LV（邏輯卷）的大小
要擴展LV您可以使用以下內容
lvextend /dev/vg1/your_lv /dev/vda5
此階段僅擴展了邏輯卷，未擴展檔案系統。
要擴展檔案系統，您可以使用resize2fs後跟LV.例如：
resize2fs /dev/vg1/your_lv
注意：lvextend具有在背景-r呼叫並自動執行此操作的標誌。resize2fs
總結以上內容：
- 擴充卷組
- 擴展邏輯磁碟區
- 調整檔案系統大小
若要縮小檔案系統（無法使用xfs），請依照下列步驟操作：
- 縮小檔案系統
- 減小邏輯卷的大小
/dev/vda5例如從磁碟區群組中刪除設備