日拱一卒
0%

RHCSA (EX200) - 调整逻辑卷大小

Posted on

设置逻辑卷大小

将逻辑卷 vo 及其文件系统的大小调整到 230 MiB。确保文件系统内容保持不变。注：分区大小很少与请求的大小完全相同，因此可以接受范围为 217 MiB 到 243 MiB 的大小。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
[root@node2 ~]# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vgroup/swap
  LV Name                swap
  VG Name                vgroup
  LV UUID                80k3wh-3b52-387w-VFW9-pLdC-7jH6-EQ0cps
  LV Write Access        read/write
  LV Creation host, time (none), 2023-02-19 11:58:34 -0500
  LV Status              available
  # open                 2
  LV Size                256.00 MiB
  Current LE             64
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1
   
  --- Logical volume ---
  LV Path                /dev/myvol/vo
  LV Name                vo
  VG Name                myvol
  LV UUID                91S5cv-jxFA-XK1F-79ZQ-pfxh-ho1Y-JUZXwM
  LV Write Access        read/write
  LV Creation host, time (none), 2023-02-19 11:58:33 -0500
  LV Status              available
  # open                 1
  LV Size                184.00 MiB
  Current LE             46
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0
   
[root@node2 ~]# vgdisplay myvol 
  --- Volume group ---
  VG Name               myvol
  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               508.00 MiB
  PE Size               4.00 MiB
  Total PE              127
  Alloc PE / Size       46 / 184.00 MiB
  Free  PE / Size       81 / 324.00 MiB
  VG UUID               Vxlt2s-G798-c1pt-B7Pf-uqaU-u6fE-j72DLZ
   
[root@node2 ~]# man lvextend 
...
       Extend an LV by a specified size.

       lvextend -L|--size [+]Size[m|UNIT] LV
           [ -l|--extents [+]Number[PERCENT] ]
           [ -r|--resizefs ]
           [ -i|--stripes Number ]
           [ -I|--stripesize Size[k|UNIT] ]
           [    --poolmetadatasize [+]Size[m|UNIT] ]
           [ COMMON_OPTIONS ]
           [ PV ... ]
[root@node2 ~]# lvextend -L 230m /dev/myvol/vo 
  Rounding size to boundary between physical extents: 232.00 MiB.
  Size of logical volume myvol/vo changed from 184.00 MiB (46 extents) to 232.00 MiB (58 extents).
  Logical volume myvol/vo successfully resized.
[root@node2 ~]# lvdisplay /dev/myvol/vo 
  --- Logical volume ---
  LV Path                /dev/myvol/vo
  LV Name                vo
  VG Name                myvol
  LV UUID                91S5cv-jxFA-XK1F-79ZQ-pfxh-ho1Y-JUZXwM
  LV Write Access        read/write
  LV Creation host, time (none), 2023-02-19 11:58:33 -0500
  LV Status              available
  # open                 1
  LV Size                232.00 MiB
  Current LE             58
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0
   
[root@node2 ~]# resize2fs /dev/mapper/myvol-vo 
resize2fs 1.45.4 (23-Sep-2019)
Filesystem at /dev/mapper/myvol-vo is mounted on /reports; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 2
The filesystem on /dev/mapper/myvol-vo is now 237568 (1k) blocks long.

[root@node2 ~]# df -Th
Filesystem           Type      Size  Used Avail Use% Mounted on
devtmpfs             devtmpfs  887M     0  887M   0% /dev
tmpfs                tmpfs     914M     0  914M   0% /dev/shm
tmpfs                tmpfs     914M   25M  889M   3% /run
tmpfs                tmpfs     914M     0  914M   0% /sys/fs/cgroup
/dev/vda3            xfs       9.9G  1.6G  8.4G  16% /
/dev/vda2            vfat      100M  6.8M   94M   7% /boot/efi
/dev/mapper/myvol-vo ext4      221M  2.1M  204M   1% /reports
tmpfs                tmpfs     183M     0  183M   0% /run/user/0

xfs_growfs 与 resize2fs 之间的主要区别是为识别文件系统而传递的参数。xfs_growfs 采用挂载点，而 resize2fs 采用逻辑卷名称。