搞了個(gè)centos7.5安裝12.2rac，安裝數(shù)據(jù)庫(kù)軟件時(shí)空間不夠，所以打算擴(kuò)一下lvm。?

操作系統(tǒng)版本：?
[root@mdb1 ~]# lsb_release -a?
LSB Version: :core-4.1-amd64:core-4.1-noarch?
Distributor ID: CentOS?
Description: CentOS Linux release 7.5.1804 (Core)?
Release: 7.5.1804?
Codename: Core?

sdb盤(pán)初始化為物理卷?
[root@mdb1 ~]# pvcreate /dev/sdb?
?Physical volume "/dev/sdb" successfully created.?
??
將要添加的物理卷加入到vg卷組中?
[root@mdb1 ~]# vgs?
?VG #PV #LV #SN Attr VSize VFree?
?centos 1 1 0 wz--n- 21.53g 0?
[root@mdb1 ~]# vgextend centos /dev/sdb?
?Volume group "centos" successfully extended?
[root@mdb1 ~]# vgs?
?VG #PV #LV #SN Attr VSize VFree?
?centos 2 1 0 wz--n- <29.53g <8.00g?
??
擴(kuò)展lvm?
[root@mdb1 ~]# lvs?
?LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert?
?root centos -wi-ao---- 21.53g?
[root@mdb1 ~]# lvextend -l +100%FREE /dev/mapper/centos-root?
?Size of logical volume centos/root changed from 21.53 GiB (5512 extents) to <29.53 GiB (7559 extents).?
?Logical volume centos/root successfully resized.?
??
此時(shí)卷組還沒(méi)擴(kuò)展，需要resize一下?
[root@mdb1 ~]# df -h?
Filesystem Size Used Avail Use% Mounted on?
/dev/mapper/centos-root 22G 14G 7.6G 65% /?
devtmpfs 1.4G 0 1.4G 0% /dev?
tmpfs 1.4G 0 1.4G 0% /dev/shm?
tmpfs 1.4G 9.6M 1.4G 1% /run?
tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup?
/dev/sda1 473M 134M 339M 29% /boot?
tmpfs 279M 0 279M 0% /run/user/0?
tmpfs 279M 0 279M 0% /run/user/1001?
??
[root@mdb1 ~]# resize2fs /dev/mapper/centos-root?
resize2fs 1.42.9 (28-Dec-2013)?
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root?
Couldn't find valid filesystem superblock.?
linux從7開(kāi)始默認(rèn)文件系統(tǒng)放棄了第四代ext4的文件系統(tǒng)，轉(zhuǎn)向了xfs日志文件系統(tǒng)。該系統(tǒng)性能比ext4增強(qiáng)很多，擴(kuò)展性也更強(qiáng)，能夠得到近似裸設(shè)備的IO性能。該文件系統(tǒng)下的lvm拉伸命令也有了變化，需要xfs_growfs實(shí)現(xiàn)之前的resize2fs命令的功能。?
[root@mdb1 ~]# xfs_growfs /dev/mapper/centos-root?
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1411072 blks?
?= sectsz=512 attr=2, projid32bit=1?
?= crc=1 finobt=0 spinodes=0?
data = bsize=4096 blocks=5644288, imaxpct=25?
?= sunit=0 swidth=0 blks?
naming =version 2 bsize=4096 ascii-ci=0 ftype=1?
log =internal bsize=4096 blocks=2756, version=2?
?= sectsz=512 sunit=0 blks, lazy-count=1?
realtime =none extsz=4096 blocks=0, rtextents=0?
data blocks changed from 5644288 to 7740416?
[root@mdb1 ~]# df -h?
Filesystem Size Used Avail Use% Mounted on?
/dev/mapper/centos-root 30G 14G 16G 48% /?
devtmpfs 1.4G 0 1.4G 0% /dev?
tmpfs 1.4G 644M 747M 47% /dev/shm?
tmpfs 1.4G 9.6M 1.4G 1% /run?
tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup?
/dev/sda1 473M 134M 339M 29% /boot?
tmpfs 279M 0 279M 0% /run/user/0?

完成！

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