Ubuntu 22.04扩容LVM空间
今天为了编译ThingsBoard的源代码，发现原来给虚拟机分配的40个G不够用了。于是乎在VMWare Workstation中扩容了40G的磁盘空间。但是此时lvm是不会自动扩容的，因此我们需要手动调整下卷的配置。首先df -h检查发现挂载的空间的确没有变化
mrchip@ubuntu22:~$ df -h
Filesystem SizeUsed Avail Use% Mounted on
tmpfs 791M2.5M788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 37G 35G 0 100% /
tmpfs 3.9G 03.9G 0% /dev/shm
tmpfs 5.0M 05.0M 0% /run/lock
/dev/sda2 2.0G253M1.6G14% /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 791M4.0K791M 1% /run/user/1000然后运行lsblk发现磁盘的确变大了
NAME MAJ:MIN RMSIZE RO TYPE MOUNTPOINTS
loop0 7:0 0 48.6M1 loop /snap/cmake/1390
loop1 7:1 0 48.6M1 loop /snap/cmake/1391
loop2 7:2 0 63.9M1 loop /snap/core20/2182
loop3 7:3 0 63.9M1 loop /snap/core20/2318
loop4 7:4 0 66.2M1 loop /snap/core24/405
loop5 7:5 0 66.2M1 loop /snap/core24/423
loop6 7:6 0 87M1 loop /snap/lxd/27948
loop7 7:7 0 17.7M1 loop /snap/helm/414
loop8 7:8 0 87M1 loop /snap/lxd/28373
loop9 7:9 0 38.7M1 loop /snap/snapd/21465
loop10 7:10 0 38.8M1 loop /snap/snapd/21759
sda 8:0 0 80G0 disk
├─sda1 8:1 0 1M0 part
├─sda2 8:2 0 2G0 part /boot
└─sda3 8:3 0 38G0 part
└─ubuntu--vg-ubuntu--lv 253:0 0 37G0 lvm/
sr0 11:0 1 2G0 rom接下来我们记录命令操作来扩容分区
1. 将新的空间新建一个磁盘分区
mrchip@ubuntu22:~$ sudo fdisk /dev/sda
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. 将新建的分区sda4转换为PV并拓展ubuntu-vg这个卷组
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 No3
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
FreePE / Size 10494 / 40.99 GiB
VG UUID aa7Nif-O9wu-0AMo-pxFA-RTsq-v48M-MZ5EUm3. 扩容ubuntu-lv这个逻辑空间
sudo lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lvSize 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 SizeUsed Avail Use% Mounted on
tmpfs 791M2.5M788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 37G 35G 0 100% /
tmpfs 3.9G 03.9G 0% /dev/shm
tmpfs 5.0M 05.0M 0% /run/lock
/dev/sda2 2.0G253M1.6G14% /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 791M4.0K791M 1% /run/user/10004. 对lvm分区的大小进行拓展
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 SizeUsed Avail Use% Mounted on
tmpfs 791M2.5M788M 1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv 77G 35G 39G48% /
tmpfs 3.9G 03.9G 0% /dev/shm
tmpfs 5.0M 05.0M 0% /run/lock
/dev/sda2 2.0G253M1.6G14% /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 791M4.0K791M 1% /run/user/1000参考链接
[*]Linux LVM分区扩容
[*]虚拟机下ubuntu使用df命令查看磁盘空间小于实际空间（解决Linux /dev/mapper/ubuntu--vg-ubuntu--lv 磁盘空间不足）
[*]LVM 'Can’t open /dev/sdb1 exclusively. Mounted filesystem?' Problem
来源:https://www.cnblogs.com/mrchip/p/18243814
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