lvextend 放大 LV

1. 查看 LV myvdb-vo 掛載在 /reports，大小為 24M ( 30M )。

   [root@kvm10 ~]# df -h
   Filesystem                 Size  Used Avail Use% Mounted on
   /dev/mapper/vg_kvm10-root  4.3G  3.1G  1.2G  73% /
   devtmpfs                   4.0M     0  4.0M   0% /dev
   tmpfs                      853M     0  853M   0% /dev/shm
   tmpfs                      342M  5.0M  337M   2% /run
   tmpfs                      1.0M     0  1.0M   0% /run/credentials/systemd-journald.service
   /dev/vda2                  436M  211M  226M  49% /boot
   tmpfs                      1.0M     0  1.0M   0% /run/credentials/getty@tty1.service
   tmpfs                      171M  8.0K  171M   1% /run/user/0
   /dev/mapper/myvdb-vo        44M   14K   41M   1% /reports
   

2. lvextend 放大 LV myvdb-vo 為 100M。

   [root@kvm10 ~]# lvextend -L 100M --resizefs /dev/myvdb/vo
     File system ext4 found on myvdb/vo mounted at /reports.
     Size of logical volume myvdb/vo changed from 52.00 MiB (13 extents) to 100.00 MiB (25 extents).
     Extending file system ext4 to 100.00 MiB (104857600 bytes) on myvdb/vo...
   resize2fs /dev/myvdb/vo
   resize2fs 1.47.1 (20-May-2024)
   Filesystem at /dev/myvdb/vo is mounted on /reports; on-line resizing required
   old_desc_blocks = 1, new_desc_blocks = 1
   The filesystem on /dev/myvdb/vo is now 102400 (1k) blocks long.
   
   resize2fs done
     Extended file system ext4 on myvdb/vo.
     Logical volume myvdb/vo successfully resized.
   

3. 再檢查 LV myvdb-vo 大小為 89M ( 100M )。

   [root@kvm10 ~]# df -h
   Filesystem                 Size  Used Avail Use% Mounted on
   /dev/mapper/vg_kvm10-root  4.3G  3.1G  1.2G  73% /
   devtmpfs                   4.0M     0  4.0M   0% /dev
   tmpfs                      853M     0  853M   0% /dev/shm
   tmpfs                      342M  5.0M  337M   2% /run
   tmpfs                      1.0M     0  1.0M   0% /run/credentials/systemd-journald.service
   /dev/vda2                  436M  211M  226M  49% /boot
   tmpfs                      1.0M     0  1.0M   0% /run/credentials/getty@tty1.service
   tmpfs                      171M  8.0K  171M   1% /run/user/0
   /dev/mapper/myvdb-vo        89M   14K   85M   1% /reports