Centos
通過相同的磁碟增長 LVM RAID5,沒有足夠的範圍
我在由 3x4TB 驅動器組成的 CentOS 8 機器上有一個現有的 LVM RAID5 陣列。該陣列的空間開始不足,因此我想將一個相同的 4TB 驅動器添加到陣列中以增加總空間。但是,當我執行時
lvextend /dev/storage/raidarray /dev/sda
,我得到以下輸出:Converted 100%PVS into 953861 physical extents. Using stripesize of last segment 64.00 KiB Archiving volume group "storage" metadata (seqno 35). Extending logical volume storage/raidarray to <10.92 TiB Insufficient free space: 1430790 extents needed, but only 953861 available
這是輸出
pvs
:PV VG Fmt Attr PSize PFree /dev/sda storage lvm2 a-- <3.64t <3.64t /dev/sdb3 cl lvm2 a-- 221.98g 0 /dev/sdc storage lvm2 a-- <3.64t 0 /dev/sdd storage lvm2 a-- <3.64t 0 /dev/sde storage lvm2 a-- <3.64t 0 /dev/sdf lvm2 --- 119.24g 119.24g
lvs -o +devices
:LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices home cl -wi-a----- <164.11g /dev/sdb3(12800) root cl -wi-ao---- 50.00g /dev/sdb3(0) swap cl -wi-ao---- <7.88g /dev/sdb3(54811) raidarray storage rwi-aor--- <7.28t 100.00 raidarray_rimage_0(0),raidarray_rimage_1(0),raidarray_rimage_2(0)
pvdisplay
:--- Physical volume --- PV Name /dev/sdb3 VG Name cl PV Size 221.98 GiB / not usable 3.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 56827 Free PE 0 Allocated PE 56827 PV UUID MM6j63-1V3E-YWXl-61ro-f3bB-7ysd-c1DGQv --- Physical volume --- PV Name /dev/sdc VG Name storage PV Size <3.64 TiB / not usable <3.84 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 953861 Free PE 0 Allocated PE 953861 PV UUID rmqBBu-DD8U-d7WW-yzKW-R97b-1M4r-RYb1Qx --- Physical volume --- PV Name /dev/sdd VG Name storage PV Size <3.64 TiB / not usable <3.84 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 953861 Free PE 0 Allocated PE 953861 PV UUID TBn2He-cRTU-eybT-fuBM-REbO-YNfr-Ca86gU --- Physical volume --- PV Name /dev/sde VG Name storage PV Size <3.64 TiB / not usable <3.84 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 953861 Free PE 0 Allocated PE 953861 PV UUID wHZOf0-KTK9-2qLW-USl9-Gkgz-6MjV-D3gWrH --- Physical volume --- PV Name /dev/sdf VG Name storage PV Size 119.24 GiB / not usable <4.34 MiB Allocatable yes PE Size 4.00 MiB Total PE 30525 Free PE 30525 Allocated PE 0 PV UUID MWWaUJ-UC2h-YT29-bMol-fWoQ-5Chl-uKBB4O --- Physical volume --- PV Name /dev/sda VG Name storage PV Size <3.64 TiB / not usable <3.84 MiB Allocatable yes PE Size 4.00 MiB Total PE 953861 Free PE 953861 Allocated PE 0 PV UUID vzGHi9-TF42-EFx9-uLch-EioJ-DI35-RuZuJt
和
lsblk
:NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 3.7T 0 disk sdb 8:16 0 223.6G 0 disk ├─sdb1 8:17 0 600M 0 part /boot/efi ├─sdb2 8:18 0 1G 0 part /boot └─sdb3 8:19 0 222G 0 part ├─cl-root 253:0 0 50G 0 lvm / └─cl-swap 253:1 0 7.9G 0 lvm [SWAP] sdc 8:32 0 3.7T 0 disk ├─storage-raidarray_rmeta_0 253:7 0 4M 0 lvm │ └─storage-raidarray 253:14 0 7.3T 0 lvm /home └─storage-raidarray_rimage_0 253:8 0 3.7T 0 lvm └─storage-raidarray 253:14 0 7.3T 0 lvm /home sdd 8:48 0 3.7T 0 disk ├─storage-raidarray_rmeta_1 253:9 0 4M 0 lvm │ └─storage-raidarray 253:14 0 7.3T 0 lvm /home └─storage-raidarray_rimage_1 253:10 0 3.7T 0 lvm └─storage-raidarray 253:14 0 7.3T 0 lvm /home sde 8:64 0 3.7T 0 disk ├─storage-raidarray_rmeta_2 253:11 0 4M 0 lvm │ └─storage-raidarray 253:14 0 7.3T 0 lvm /home └─storage-raidarray_rimage_2 253:12 0 3.7T 0 lvm └─storage-raidarray 253:14 0 7.3T 0 lvm /home sdf 8:80 0 119.2G 0 disk sdg 8:96 1 14.8G 0 disk └─sdg1 8:97 1 14.8G 0 part
我一直在尋找這個問題的答案,但幾乎找不到關於 LVM RAID 的文章;只有mdadm。有人知道我可以在不購買額外驅動器且不失去數據的情況下擴展 RAID 陣列的方法嗎?
我通常不使用 LVM RAID,所以如果我重現你的情況有點不完美,請原諒。所以數字會有點奇怪。
考慮到 3 設備 RAID 5 在
mdadm
. 在 LVM 術語中,這稱為具有 2 個條帶的 raid5(不計算奇偶校驗)。# lvs -o +devices HDD/raidtest LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices raidtest HDD rwi-a-r--- 256.00m 100.00 raidtest_rimage_0(0),raidtest_rimage_1(0),raidtest_rimage_2(0)
再增加一條條紋的工作方式如下:
# lvconvert --stripes 3 HDD/raidtest Using default stripesize 64.00 KiB. WARNING: Adding stripes to active logical volume HDD/raidtest will grow it from 4 to 6 extents! Run "lvresize -l4 HDD/raidtest" to shrink it or use the additional capacity. Are you sure you want to add 1 images to raid5 LV HDD/raidtest? [y/n]: maybe [... this takes a while ...] Logical volume HDD/raidtest successfully converted.
需要注意的事項:WARNING 消息應該清楚地說明設備正在增長,而不是縮小。
此外,我沒有指定擴展使用哪個 PV,所以 LVM 自己選擇了它。在您的情況下,這也是可選的,應該可以正常工作(因為沒有其他符合條件的 PV),但請隨意繼續指定它,這樣就不會有任何意外。
結果:
# lvs -o +devices HDD/raidtest LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert Devices raidtest HDD rwi-a-r--- 384.00m 100.00 raidtest_rimage_0(0),raidtest_rimage_1(0),raidtest_rimage_2(0),raidtest_rimage_3(0)
在這種情況下,文件系統將不會增長,您可以選擇單獨執行此操作或使用
lvresize
將 LV 縮小到以前的狀態(現在只是分發到更多驅動器)。我想這在並排使用多個 RAID LV 時很有用,而不是像您似乎正在做的那樣將整個磁碟分配給單個磁碟。