扩大ubuntu的ubuntu--vg-ubuntu--lv空间

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1、问题

想运行tmux，结果

longqiping@ubuntu:~$ tmux
error creating /tmp//tmux-1000 (No space left on device)

2、检查

longqiping@ubuntu:~$ df /tmp
Filesystem                        1K-blocks     Used Available Use% Mounted on
/dev/mapper/ubuntu--vg-ubuntu--lv 65019484 62892356 0 100% /

发现/tmp所在的/即ubuntu--vg-ubuntu--lv的空间没有了。

查看lvm卷组的信息

root@ubuntu:/home/longqiping# vgdisplay
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID             
  Format                lvm2
  Metadata Areas 1 Metadata Sequence No 2 VG Access             read/write
  VG Status             resizable
  MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size               <126.50 GiB
  PE Size               4.00 MiB
  Total PE 32383 Alloc PE / Size 16192 / 63.25 GiB
  Free  PE / Size 16191 / <63.25 GiB
  VG UUID               8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy

3、解决

使用命令进行磁盘扩容

lvextend -L 10G /dev/mapper/ubuntu--vg-ubuntu--lv      //增大或减小至19G
lvextend -L +10G /dev/mapper/ubuntu--vg-ubuntu--lv     //增加10G
lvreduce -L -10G /dev/mapper/ubuntu--vg-ubuntu--lv     //减小10G
lvresize -l  +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv   //按百分比扩

使用如下命令，将/tmp增加60G

root@ubuntu:/home/longqiping# lvresize -L +60G /dev/mapper/ubuntu--vg-ubuntu--lv
  Size of logical volume ubuntu-vg/ubuntu-lv changed from 63.25 GiB (16192 extents) to 123.25 GiB (31552 extents).
  Logical volume ubuntu-vg/ubuntu-lv successfully resized.

扩容

root@ubuntu:/home/longqiping# resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
resize2fs 1.45.5 (07-Jan-2020) Filesystem at /dev/mapper/ubuntu--vg-ubuntu--lv is mounted on /; on-line resizing required old_desc_blocks = 8, new_desc_blocks = 16 The filesystem on /dev/mapper/ubuntu--vg-ubuntu--lv is now 32309248 (4k) blocks long.

看看效果

root@ubuntu:/home/longqiping# vgdisplay
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID             
  Format                lvm2
  Metadata Areas 1 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 1 Act PV 1 VG Size               <126.50 GiB
  PE Size               4.00 MiB
  Total PE 32383 Alloc PE / Size 31552 / 123.25 GiB
  Free  PE / Size 831 / <3.25 GiB
  VG UUID               8cak6E-4fZv-kGgq-lsOA-9FHC-Ju7R-kn2RJy
   
root@ubuntu:/home/longqiping# df -h
Filesystem                         Size  Used Avail Use% Mounted on
udev                                16G 0 16G   0% /dev
tmpfs                              3.2G  1.5M  3.2G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv  122G   61G   56G  52% /
tmpfs                               16G 0 16G   0% /dev/shm
tmpfs                              5.0M 0 5.0M   0% /run/lock
tmpfs                               16G 0 16G   0% /sys/fs/cgroup
/dev/vda2                          976M  396M  514M  44% /boot
/dev/loop0                          49M   49M 0 100% /snap/core18/1883
/dev/vda1                          511M  3.5M  508M   1% /boot/efi
/dev/loop1                          49M   49M 0 100% /snap/core18/1990
/dev/loop2                          27M   27M 0 100% /snap/snapd/11043
/dev/loop3                          29M   29M 0 100% /snap/snapd/11115
/dev/loop5                          62M   62M 0 100% /snap/lxd/19206
/dev/loop4                          63M   63M 0 100% /snap/lxd/19648
tmpfs                              3.2G 0 3.2G   0% /run/user/1000