AWS create vg and extend disk dymaticly 动态扩容磁盘

AWS create vg and extend disk dymaticly 动态扩容磁盘

Understanding the basic concepts

Common commands

#goto AWS COSOLE create 2 blocks with 2G & 3G

lsblk

found xvdf xvdg

yum install -y lvm2

# create physical volume

pvcreate /dev/xvdf /dev/xvdg

#show physcial volume

pvs

#display vg

vgdisplay /dev/xvdf

vgcreate vg001 /dev/xvdf /dev/xvdg

vgdisplay vg001

#5g少了一点啊

#full assign to one lv

lvcreate -l 100%FREE -n lv001 vg001

# or assign size to one lv

#lvcreate -L 4.99G -n lv001 vg001

#format and mount

#reduce & extend lv

lvreduce -L -1G -r /dev/vg001/lv001

lvextend -l +100%FREE -r /dev/vg001/lv001

#format & mount

#goto aws create 4G volume block and attached to instance

#extend vg001

vgextend vg001 /dev/xvdh

vg有9g了

#lv 也扩容下

lvextend -l +100%FREE /dev/vg001/lv001

#resize ext4 file system

resize2fs /dev/mapper/vg001-lv001

#resize xfs file system

#xfs_growfs /dev/mapper/vg001-lv001

remove command

1. Once you have umounted all the mount points, you can remove the LVs associated with them. To do so use the lvremove command :

# lvremove -f [vg_name]/[lv_name]

2. To remove the Volume group we have to deactivate it first with vgchange command :

# vgchange -an [vg_name]

3. You can remove the VG now.

# vgremove [vg_name]

4. To remove physical volumes in the VG use following command:

# pvremove [pv_name]

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