使用fdisk/dev/sdc,创建新分区;
[root@localhostindices]#fdisk/dev/sdc
DevicecontainsneitheravalidDOSpartitiontable,norSun,SGIorOSFdisklabel
BuildinganewDOSdisklabelwithdiskidentifier0x5799aeba.
Changeswillremaininmemoryonly,untilyoudecidetowritethem.
Afterthat,ofcourse,thepreviouscontentwon'tberecoverable.
Warning:invalidflag0x0000ofpartitiontable4willbecorrectedbyw(rite)
WARNING:Thesizeofthisdiskis2.2TB(2199023255552bytes).
DOSpartitiontableformatcannotbeusedondrivesforvolumes
largerthan(2199023255040bytes)for512-bytesectors.Useparted(1)andGUID
partitiontableformat(GPT).
WARNING:DOS-compatiblemodeisdeprecated.It'sstronglyrecommendedto
switchoffthemode(command'c')andchangedisplayunitsto
sectors(command'u').
Command(mforhelp):n#new新分区
Commandaction
eextended
pprimarypartition(1-4)
p#选择主扇区
Partitionnumber(1-4):1#起始扇区
Firstcylinder(1-267349,default1):#这里直接回车表示取默认值1
Usingdefaultvalue1
Lastcylinder,+cylindersor+size{K,M,G}(1-267349,default267349):#这里由于es需要的存储空间比较大,所以2个T的空间我都加上了,正常可以按照需求修改扇区大小
Usingdefaultvalue267349
Command(mforhelp):w#保存退出
Thepartitiontablehasbeenaltered!
Callingioctl()tore-readpartitiontable.
Syncingdisks.
然后创建物理卷,使用pvcreate/dev/sdc1命令;注意:这里很多文章里要求重启系统,这里其实可以不用重启,可直接操作,不影响服务器的正常运行;
[root@localhostindices]#pvcreate/dev/sdc1
Physicalvolume"/dev/sdc1"successfullycreated
使用vgscan查看物理卷组名称;
[root@localhostindices]#vgscan
Readingallphysicalvolumes.Thismaytakeawhile...
Foundvolumegroup"VolGroup"usingmetadatatypelvm2
#这里物理卷组名称为VolGroup
将刚才增加的物理扇区加载到卷组中,这里使用vgextendVolGroup/dev/sdc1;
[root@localhostindices]#vgextendVolGroup/dev/sdc1
Volumegroup"VolGroup"successfullyextended
增加卷组的大小,这里使用lvextend-L+2048G/dev/mapper/VolGroup-lv_root;
[root@localhostindices]#lvextend-L+2048G/dev/mapper/VolGroup-lv_root
SizeoflogicalvolumeVolGroup/lv_rootchangedfrom135.47GiB(34681extents)to2.13TiB(558848extents).
Logicalvolumelv_rootsuccessfullyresized.
使用df-h查看空间扩充情况,发现空间并未扩充,这是因为文件系统还未同步;
[root@localhostindices]#df-h
FilesystemSizeUsedAvailUse%Mountedon
/dev/mapper/VolGroup-lv_root
134G119G8.4G94%/
tmpfs32G72K32G1%/dev/shm
/dev/sda1477M41M411M10%/boot
同步文件系统,使用xfs_growfs或者resize2fs同步文件系统,如下操作;
[root@localhostindices]#resize2fs-f/dev/mapper/VolGroup-lv_root
resize2fs1.41.12(17-May-2010)
Filesystemat/dev/mapper/VolGroup-lv_rootismountedon/;on-lineresizingrequired
olddesc_blocks=9,new_desc_blocks=137
Performinganon-lineresizeof/dev/mapper/VolGroup-lv_rootto572260352(4k)blocks.
Thefilesystemon/dev/mapper/VolGroup-lv_rootisnow572260352blockslong.
再使用df-h查看空间扩容情况
[root@localhostindices]#df-h
FilesystemSizeUsedAvailUse%Mountedon
/dev/mapper/VolGroup-lv_root
2.1T125G1.9T7%/
tmpfs32G72K32G1%/dev/shm
/dev/sda1477M41M411M10%/boot
由于CentOS6和CentOS7在默认根文件系统的文件系统格式存在差异,需要判断是否为xfs,如果是xfs则应该使用xfs_growfs而不是一味的使用resize2fs。
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