xfs_growfs动态调整XFS文件系统¶

使用 xfs_growfs动态调整XFS文件系统在线扩展XFS文件系统:
```
xfs_growfs /
```

提示信息:

meta-data=/dev/vda2              isize=512    agcount=4, agsize=376704 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=1506816, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

但是，实际上没有完成扩展，使用 df -h 检查可以看到不变

如果使用 -d 参数来扩容最大化:
```
xfs_growfs -d /
```

则提示:

meta-data=/dev/vda2              isize=512    agcount=4, agsize=376704 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=1506816, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data size unchanged, skipping

但是可以看到最后提示 data size unchanged, skipping

原来，我忘记先将分区扩展:

需要使用 growpart 工具，在 fedora 中需要安装 cloud-utils-growpart ，在 ubuntu 中需要安装 cloud-guest-utils
```
sudo dnf install cloud-utils-growpart
```
先扩展分区:
```
growpart /dev/vda 2
```

提示信息:

CHANGED: partition=2 start=526336 old: size=12054528 end=12580864 new: size=33028063 end=33554399

此时再次检查磁盘就可以看到完整使用了磁盘:
```
fdisk -l /dev/vda
```

显示:

Disk /dev/vda: 16 GiB, 17179869184 bytes, 33554432 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 8A2359A8-F37E-405B-AD00-8036DCC8E610

Device      Start      End  Sectors  Size Type
/dev/vda1    2048   526335   524288  256M EFI System
/dev/vda2  526336 33554398 33028063 15.7G Linux filesystem

再次扩容XFS就能够成功:
```
xfs_growfs -d /
```

提示信息:

meta-data=/dev/vda2              isize=512    agcount=4, agsize=376704 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1    bigtime=0 inobtcount=0
data     =                       bsize=4096   blocks=1506816, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 1506816 to 4128507

检查分区挂载:
```
df -h
```

提示信息显示如下:

Filesystem      Size  Used Avail Use% Mounted on
...
/dev/vda2        16G  4.1G   12G  26% /
...

xfs_growfs动态调整XFS文件系统¶

参考¶