我的 CentOS 8 机器中有如下分区:
[root@XXXXX]# fdisk -l
Disk /dev/sda: 80 GiB, 85899345920 bytes, 167772160 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: dos
Disk identifier: 0xbccac24e
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 2099199 2097152 1G 83 Linux
/dev/sda2 2099200 167768063 165668864 79G 8e Linux LVM
Disk /dev/mapper/cl-root: 76.5 GiB, 82137055232 bytes, 160423936 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
Disk /dev/mapper/cl-swap: 2.5 GiB, 2684354560 bytes, 5242880 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
[root@XXXXX]#
/dev/mapper/cl-root
显示大小为 76.5 GiB。但df -h
根目录显示的大小不同,为 22G:
[root@XXXXX]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 9.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/cl-root 22G 22G 62M 100% /
/dev/sda1 976M 256M 654M 29% /boot
tmpfs 379M 1.2M 377M 1% /run/user/42
tmpfs 379M 4.6M 374M 2% /run/user/1000
[root@XXXXX]#
我需要扩展我的根文件系统,因为它的空间不足。我无法为/dev/mapper/cl-root
.以下是pvdisplay
和 的结果lsblk
:
[root@XXXXX]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name cl
PV Size <79.00 GiB / not usable 1.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 20223
Free PE 0
Allocated PE 20223
PV UUID XXXXXX-XXXX-XXXX-XXXX-XXXX-XXXXX-XXXXX
[root@XXXXX]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 80G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 79G 0 part
├─cl-root 253:0 0 76.5G 0 lvm /
└─cl-swap 253:1 0 2.5G 0 lvm [SWAP]
sr0 11:0 1 1024M 0 rom
[root@XXXXX]#
lvdisplay
显示以下输出:
[root@XXXXX]# lvdisplay
--- Logical volume ---
LV Path /dev/cl/swap
LV Name swap
VG Name cl
LV UUID 000000000000000000000000000
LV Write Access read/write
LV Creation host, time localhost, 2020-01-29 21:17:47 -0500
LV Status available
# open 2
LV Size 2.50 GiB
Current LE 640
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:1
--- Logical volume ---
LV Path /dev/cl/root
LV Name root
VG Name cl
LV UUID 00000000000000000000000000
LV Write Access read/write
LV Creation host, time localhost, 2020-01-29 21:17:48 -0500
LV Status available
# open 1
LV Size <76.50 GiB
Current LE 19583
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
[root@XXXXX]#
我使用的是 CentOS 8。我该怎么办?
答案1
您的 LV/dev/cl/root
已达到最大可用大小。您需要的是调整文件系统的大小。如果您使用默认选项,则为xfs
,因此命令应为:
xfs_growfs /
此命令会将 xfs 卷扩展到所有可用空间。请记住,xfs
体积无法缩小。
使用xfs_growfs / -D size
,您可以指定要扩展的大小,但它以文件系统块表示,而不是 MB/GB。xfs_info
命令将显示块大小。
此命令将帮助您查看 LV 大小和 xfs 卷大小之间的差异:
lsblk -o name,fstype,size,fssize,mountpoint,label,model,vendor
另外pvs
,分别对 LVM 物理卷、卷组和逻辑卷进行了很好的总结vgs
。lvs