centos7 分区扩容 （新增磁盘）
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2024-03-09 09:47:05
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新增一块60G硬盘，根分区及data分区各增加30G空间
一、初始大小
[[email protected] ~]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 2.0G 0 2.0G 0% /dev
tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs tmpfs 2.0G 12M 2.0G 1% /run
tmpfs tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/mapper/centos-root xfs 40G 1.5G 38G 4% /
/dev/mapper/centos-data xfs 40G 33M 40G 1% /data
/dev/sda1 xfs 497M 143M 354M 29% /boot
tmpfs tmpfs 407M 0 407M 0% /run/user/0
二、查看卷名
[[email protected] ~]# vgdisplay |grep -E "VG Name" 也可以查看剩余空间，FREE SIZE一行中，这里就不写了
VG Name centos
[[email protected] ~]#
三、查看路径
[[email protected] ~]# lvdisplay |grep -E "LV Path"
LV Path /dev/centos/swap
LV Path /dev/centos/root
LV Path /dev/centos/data
四、查看新增磁盘大小及名称，这里是/dev/sdb
[[email protected] ~]# fdisk -l /dev/sdb
Disk /dev/sdb: 64.4 GB, 64424509440 bytes, 125829120 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
五、格式化磁盘/dev/sdb
这一步一般可以省略
[[email protected] ~]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb isize=512 agcount=4, agsize=3932160 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=15728640, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=7680, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
六、/dev/sdb加入centos虚拟组
pvcreate /dev/sdb
或
vgextend centos /dev/sdb
[[email protected] ~]# pvcreate /dev/sdb
WARNING: xfs signature detected on /dev/sdb at offset 0. Wipe it? [y/n]: y
Wiping xfs signature on /dev/sdb.
Physical volume "/dev/sdb" successfully created.
七、增加/data分区空间
[[email protected] ~]# lvextend -L +30G /dev/centos/data
Size of logical volume centos/data changed from 39.46 GiB (10103 extents) to 69.46 GiB (17783 extents).
Logical volume centos/data successfully resized.
八、刷新,**分区
[[email protected] ~]# xfs_growfs /dev/mapper/centos-data
meta-data=/dev/mapper/centos-data isize=512 agcount=4, agsize=2586368 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=10345472, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=5051, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 10345472 to 18209792
九、同上，增加/根分区空间
[[email protected] ~]# lvextend -L +30G /dev/centos/root
Size of logical volume centos/root changed from 39.06 GiB (10000 extents) to 69.06 GiB (17680 extents).
Logical volume centos/root successfully resized.
[[email protected] ~]#
[[email protected] ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=2560000 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=10240000, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=5000, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 10240000 to 18104320
[[email protected] ~]#
[[email protected] ~]#
[[email protected] ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 2.0G 0 2.0G 0% /dev
tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs 2.0G 12M 2.0G 1% /run
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/mapper/centos-root 70G 1.5G 68G 3% /
/dev/mapper/centos-data 70G 33M 70G 1% /data
/dev/sda1 497M 143M 354M 29% /boot
tmpfs 407M 0 407M 0% /run/user/0
以上可以看出/根分区 及/data分区各增加了30G空间大小
另：
fdisk /dev/sda 磁盘分区
partprobe 重载分区表
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