VM擴容

LVM擴容

1. 分區基本結構

lsblk

NAME         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sr0           11:0    1 335.6M  0 rom  
vda          252:0    0    63G  0 disk 
├─vda1       252:1    0   500M  0 part /boot
└─vda2       252:2    0  61.5G  0 part 
  ├─xxx-root 253:0    0  57.6G  0 lvm  /
  └─xxx-swap 253:1    0   3.9G  0 lvm  [SWAP]
vdb          252:16   0    20G  0 disk 
└─vdb1       252:17   0    20G  0 part /path/of/mount

2. parted /dev/vda

   (parted) print #打印分區信息，大概如下：
    Model: Virtio Block Device (virtblk)
    Disk /dev/vda: 67.6GB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    Disk Flags: 
   
    Number  Start   End     Size    Type     File system  標誌
    1      1049kB  525MB   524MB   primary  ext4         啓動
    2      525MB   66.6GB  66.0GB  primary               lvm
   

   (parted) resizepart 2 #調整想要調整的分區，2對應上面的Number值; 
                           #當出現提示結束點時，比如：結束點？  [64.4GB]? 
                           #此時默認的值是當前分區的大小，要擴大就要輸入新的值
                           #該值一般就取print輸出的Disk大小 (如：Disk /dev/vda: 67.6GB)
   

   (parted) quit         #退出parted
   

3. partprobe

4. pvresize /dev/vda2

5. lvresize -l +100%FREE /dev/xxx/root

6. resize2fs /dev/xxx/root