擴容前
df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.9G 0 7.9G 0% /dev
tmpfs 7.9G 16M 7.9G 1% /dev/shm
tmpfs 7.9G 840M 7.1G 11% /run
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/mapper/vg_root-lv_root 50G 4.3G 46G 9% /
/dev/sda1 1014M 206M 809M 21% /boot
/dev/mapper/vg_root-lv_var 10G 2.0G 8.1G 20% /var
/dev/mapper/vg_data-lv_data 4.0T 3.6T 300G 90% /data
在vcenter或者vmware給虛擬機添加新的硬盤後，查看是否存在
1、fdisk -l 查找新加的硬盤 ，一般是最後一個
格式化硬盤 fdisk /dev/sdd
先按n創建，再選擇 p 創建主分區，其他回車默認
2、給新加的硬盤創建分區
parted /dev/sdd
GNU Parted 3.1
Using /dev/sdd
Welcome to GNU Parted! Type 'help' to view a list of commands.
給創建的分區指定分區表
(parted) mklabel msdos (這裏按照原系統有的的硬盤格式來做)
Warning: The existing disk label on /dev/sdd will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? yes
(parted) quit
Information: You may need to update /etc/fstab. 如果是給新的分區掛載，需要加到/etc/fstab自啓
3、將物理硬盤分區初始化爲物理卷，以便LVM使用
pvcreate /dev/sdd
查看卷組
[root@DB1 postgresql]# lvdisplay
--- Logical volume ---
LV Path /dev/vg_data/lv_data
LV Name lv_data
VG Name vg_data
LV UUID FjYXcv-0F3W-uMny-OG71-fHll-gM7p-slrsvL
LV Write Access read/write
LV Creation host, time ZABBIX1, 2020-09-27 20:15:09 +0800
卷組拓展，把 /dev/sdd 加到 vg_data組
root@DB1 ~]# vgextend vg_data /dev/sdd
Volume group "vg_data" successfully extended
分區拓展，把 /dev/sdd的空間拓展到 /dev/vg_data/lv_data 分區
[root@DB1 ~]# lvextend /dev/vg_data/lv_data /dev/sdd
Size of logical volume vg_data/lv_data changed from <6.00 TiB (1572861 extents) to <8.00 TiB (2097148 extents).
Logical volume vg_data/lv_data successfully resized.
4、執行擴容命令
[root@DB1 ~]# xfs_growfs /dev/vg_data/lv_data
meta-data=/dev/mapper/vg_data-lv_data isize=512 agcount=9, agsize=134152192 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=1073739776, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=262016, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 1073739776 to 1610609664
5、查看擴容結果
df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.9G 0 7.9G 0% /dev
tmpfs 7.9G 16M 7.9G 1% /dev/shm
tmpfs 7.9G 840M 7.1G 11% /run
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/mapper/vg_root-lv_root 50G 4.3G 46G 9% /
/dev/sda1 1014M 206M 809M 21% /boot
/dev/mapper/vg_root-lv_var 10G 2.0G 8.1G 20% /var
/dev/mapper/vg_data-lv_data 6.0T 3.6T 2.5T 60% /data