今天為了編譯ThingsBoard的原始碼，發現原來給虛擬機器分配的40個G不夠用了。於是乎在VMWare Workstation中擴容了40G的磁碟空間。但是此時lvm是不會自動擴容的，因此我們需要手動調整下卷的配置。
首先df -h檢查發現掛載的空間的確沒有變化
mrchip@ubuntu22:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 791M 2.5M 788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 37G 35G 0 100% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 253M 1.6G 14% /boot
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e80883038e918e14fc90c4519ecc708e642d079d7482ae9a0b78b456c0502ed3/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/baca760e9d9316152da7adb633a6bb05ab76e6cbfe1267bea951f1b3a9038c05/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e8f65d1e3aa83c67c5c55ae5e2bce0b87e905477d0a7dc20ee6fc15a47d2a2eb/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/1d091959988cd36e8f71b01572a2e37e341238d263627d8eb839798c4dec86d9/shm
tmpfs 791M 4.0K 791M 1% /run/user/1000
然後執行lsblk發現磁碟的確變大了
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 48.6M 1 loop /snap/cmake/1390
loop1 7:1 0 48.6M 1 loop /snap/cmake/1391
loop2 7:2 0 63.9M 1 loop /snap/core20/2182
loop3 7:3 0 63.9M 1 loop /snap/core20/2318
loop4 7:4 0 66.2M 1 loop /snap/core24/405
loop5 7:5 0 66.2M 1 loop /snap/core24/423
loop6 7:6 0 87M 1 loop /snap/lxd/27948
loop7 7:7 0 17.7M 1 loop /snap/helm/414
loop8 7:8 0 87M 1 loop /snap/lxd/28373
loop9 7:9 0 38.7M 1 loop /snap/snapd/21465
loop10 7:10 0 38.8M 1 loop /snap/snapd/21759
sda 8:0 0 80G 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 2G 0 part /boot
└─sda3 8:3 0 38G 0 part
└─ubuntu--vg-ubuntu--lv 253:0 0 37G 0 lvm /
sr0 11:0 1 2G 0 rom
接下來我們記錄命令操作來擴容分割槽
1. 將新的空間新建一個磁碟分割槽
mrchip@ubuntu22:~$ sudo fdisk /dev/sda
[sudo] password for mrchip:
Welcome to fdisk (util-linux 2.37.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
GPT PMBR size mismatch (83886079 != 167772159) will be corrected by write.
This disk is currently in use - repartitioning is probably a bad idea.
It's recommended to umount all file systems, and swapoff all swap
partitions on this disk.
Command (m for help): n
Partition number (4-128, default 4):
First sector (83884032-167772126, default 83884032):
Last sector, +/-sectors or +/-size{K,M,G,T,P} (83884032-167772126, default 167772126):
Created a new partition 4 of type 'Linux filesystem' and of size 40 GiB.
Command (m for help): w
The partition table has been altered.
Syncing disks.
2. 將新建的分割槽sda4轉換為PV並擴充ubuntu-vg這個卷組
mrchip@ubuntu22:~$ sudo pvcreate -ff -y /dev/sda4
Physical volume "/dev/sda4" successfully created.
mrchip@ubuntu22:~$ sudo vgextend ubuntu-vg /dev/sda4
Volume group "ubuntu-vg" successfully extended
mrchip@ubuntu22:~$ sudo vgdisplay
--- Volume group ---
VG Name ubuntu-vg
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 77.99 GiB
PE Size 4.00 MiB
Total PE 19966
Alloc PE / Size 9472 / 37.00 GiB
Free PE / Size 10494 / 40.99 GiB
VG UUID aa7Nif-O9wu-0AMo-pxFA-RTsq-v48M-MZ5EUm
3. 擴容ubuntu-lv這個邏輯空間
sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
Size of logical volume ubuntu-vg/ubuntu-lv changed from 37.00 GiB (9472 extents) to 77.99 GiB (19966 extents).
Logical volume ubuntu-vg/ubuntu-lv successfully resized.
mrchip@ubuntu22:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 791M 2.5M 788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 37G 35G 0 100% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 253M 1.6G 14% /boot
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e80883038e918e14fc90c4519ecc708e642d079d7482ae9a0b78b456c0502ed3/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/baca760e9d9316152da7adb633a6bb05ab76e6cbfe1267bea951f1b3a9038c05/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e8f65d1e3aa83c67c5c55ae5e2bce0b87e905477d0a7dc20ee6fc15a47d2a2eb/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/1d091959988cd36e8f71b01572a2e37e341238d263627d8eb839798c4dec86d9/shm
tmpfs 791M 4.0K 791M 1% /run/user/1000
4. 對lvm分割槽的大小進行擴充
mrchip@ubuntu22:~$ sudo resize2fs /dev/ubuntu-vg/ubuntu-lv
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/ubuntu-vg/ubuntu-lv is mounted on /; on-line resizing required
old_desc_blocks = 5, new_desc_blocks = 10
The filesystem on /dev/ubuntu-vg/ubuntu-lv is now 20445184 (4k) blocks long.
mrchip@ubuntu22:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 791M 2.5M 788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 77G 35G 39G 48% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
/dev/sda2 2.0G 253M 1.6G 14% /boot
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e80883038e918e14fc90c4519ecc708e642d079d7482ae9a0b78b456c0502ed3/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/baca760e9d9316152da7adb633a6bb05ab76e6cbfe1267bea951f1b3a9038c05/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/e8f65d1e3aa83c67c5c55ae5e2bce0b87e905477d0a7dc20ee6fc15a47d2a2eb/shm
shm 64M 0 64M 0% /run/k3s/containerd/io.containerd.grpc.v1.cri/sandboxes/1d091959988cd36e8f71b01572a2e37e341238d263627d8eb839798c4dec86d9/shm
tmpfs 791M 4.0K 791M 1% /run/user/1000
參考連結
- Linux LVM分割槽擴容
- 虛擬機器下ubuntu使用df命令檢視磁碟空間小於實際空間（解決Linux /dev/mapper/ubuntu--vg-ubuntu--lv 磁碟空間不足）
- LVM 'Can’t open /dev/sdb1 exclusively. Mounted filesystem?' Problem