虚拟机 Centos7扩展磁盘空间

矫情吗；* 2023-07-15 13:12 15阅读 0赞

## （一）虚拟机vmware centos7 扩展磁盘空间 ##

> `[root@aubin ~]# vgdisplay`  
> — Volume group —  
> VG Name ***`centos`***  
> System ID  
> Format lvm2  
> Metadata Areas 2  
> Metadata Sequence No 4  
> VG Access read/write  
> VG Status resizable  
> MAX LV 0  
> Cur LV 2  
> Open LV 2  
> Max PV 0  
> Cur PV 2  
> Act PV 2  
> VG Size 23.99 GiB  
> PE Size 4.00 MiB  
> Total PE 6142  
> Alloc PE / Size 4863 / <19.00 GiB  
> Free PE / Size 1279 / <5.00 GiB  
> VG UUID jasglx-OPLA-G0g2-qpgP-wmS3-nISE-JylLNv

注意这个名字

> `[root@aubin ~]# mkfs.xfs -f /dev/sda3`  
> meta-data=/dev/sda3 isize=512 agcount=4, agsize=1310720 blks  
> = sectsz=512 attr=2, projid32bit=1  
> = crc=1 finobt=0, sparse=0  
> data = bsize=4096 blocks=5242880, imaxpct=25  
> = sunit=0 swidth=0 blks  
> naming =version 2 bsize=4096 ascii-ci=0 ftype=1  
> log =internal log bsize=4096 blocks=2560, version=2  
> = sectsz=512 sunit=0 blks, lazy-count=1  
> realtime =none extsz=4096 blocks=0, rtextents=0

> `[root@aubin ~]# pvcreate -f /dev/sda3`  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Couldn’t find device with uuid dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6.  
> Wiping xfs signature on /dev/sda3.  
> Physical volume “/dev/sda3” successfully created.

> `[root@aubin ~]# vgextend centos /dev/sda3`  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Couldn’t find device with uuid dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6.  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Volume group “centos” successfully extended

> `[root@aubin ~]# lvdisplay`  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Couldn’t find device with uuid dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6.  
> — Logical volume —  
> `LV Path /dev/centos/swap`  
> LV Name swap  
> VG Name centos  
> LV UUID Xgfxxk-caKK-3PtU-m8Hp-1WVU-N5na-NjytY6  
> LV Write Access read/write  
> LV Creation host, time localhost.localdomain, 2019-03-28 02:19:24 +0800  
> LV Status available  
> \#open 2  
> LV Size 2.00 GiB  
> Current LE 512  
> Segments 1  
> Allocation inherit  
> Read ahead sectors auto  
> \-currently set to 8192  
> Block device 253:1
> 
> — Logical volume —  
> LV Path /dev/centos/root  
> LV  
> Name root  
> VG Name centos  
> LV UUID P4AJcd-iOZf-sywl-Acrq-Ge7a-QrTx-3GYgkz  
> LV Write Access read/write  
> LV Creation host, time localhost.localdomain, 2019-03-2802:19:25 +0800  
> LV Status available \# open  
> 1 LV Size <17.00 GiB Current LE 4351  
> Segments 1  
> Allocation inherit  
> Read ahead sectors auto  
> \-currently set to 8192  
> Block device 253:0

注意此处的路径（标红的）

> `[root@aubin ~]# lvextend /dev/centos/root /dev/sd3`  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Couldn’t find device with uuid dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6.  
> Cannot change VG centos while PVs are missing.  
> Consider vgreduce --removemissing.  
> Cannot process volume group centos

> `[root@aubin ~]# vgreduce --removemissing vgname`  
> Volume group “vgname” not found  
> Cannot process volume group vgnam

> `[root@aubin ~]# vgreduce --removemissing centos`  
> WARNING: Device for PV dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6 not found or rejected by a filter.  
> Couldn’t find device with uuid dRKew5-i08K-vSGQ-okUo-Qx9M-DY2e-CBGUN6.  
> Wrote out consistent volume group centos.

> `[root@aubin ~]# vgdisplay`  
> — Volume group —  
> VG Name centos  
> System ID  
> Format lvm2  
> Metadata Areas 2  
> Metadata Sequence No 6  
> VG Access read/write  
> VG Status resizable  
> MAX LV 0  
> Cur LV 2  
> Open LV 2  
> Max PV 0  
> Cur PV 2  
> Act PV 2  
> VG Size 38.99 GiB  
> PE Size 4.00 MiB  
> Total PE 9982  
> Alloc PE / Size 4863 / <19.00 GiB  
> Free PE / Size 5119 / <20.00 GiB  
> VG UUID jasglx-OPLA-G0g2-qpgP-wmS3-nISE-JylLNv

> `[root@aubin ~]# df -h`  
> Filesystem Size Used Avail Use% Mounted on  
> /dev/mapper/centos-root 17G 17G 553M 97% /  
> devtmpfs 894M 0 894M 0% /dev  
> tmpfs 910M 0 910M 0% /dev/shm  
> tmpfs 910M 11M 900M 2% /run  
> tmpfs 910M 0 910M 0% /sys/fs/cgroup  
> /dev/sda1 1014M 236M 779M 24% /boot  
> tmpfs 182M 4.0K 182M 1% /run/user/42  
> tmpfs 182M 20K 182M 1% /run/user/0

> `[root@aubin ~]# xfs_growfs /dev/centos/root`  
> meta-data=/dev/mapper/centos-root isize=512 agcount=4,  
> agsize=1113856 blks  
> = sectsz=512 attr=2, projid32bit=1  
> = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=4455424, imaxpct=25  
> = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=2560, version=2  
> = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0,  
> rtextents=0

> `[root@aubin ~]# df -h`  
> Filesystem Size Used Avail Use%  
> Mounted on /dev/mapper/centos-root 17G 17G 553M 97% / devtmpfs  
> 894M 0 894M 0% /dev tmpfs 910M 0 910M  
> 0% /dev/shm tmpfs 910M 11M 900M 2% /run tmpfs  
> 910M 0 910M 0% /sys/fs/cgroup /dev/sda1 1014M  
> 236M 779M 24% /boot tmpfs 182M 4.0K 182M 1%  
> /run/user/42 tmpfs 182M 20K 182M 1%  
> /run/user/0

> `[root@aubin ~]# lvextend /dev/centos/root /dev/sd3`  
> Physical Volume  
> “/dev/sd3” not found in Volume Group “centos”.

> `[root@aubin ~]# lvextend /dev/centos/root /dev/sda3`  
> Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to 36.99 GiB (9470 extents). Logical volume centos/root successfully resized.

> `[root@aubin ~]# df -h`  
> Filesystem Size Used Avail Use%  
> Mounted on /dev/mapper/centos-root 37G 17G 21G 45% / devtmpfs  
> 894M 0 894M 0% /dev tmpfs 910M 0 910M  
> 0% /dev/shm tmpfs 910M 11M 900M 2% /run tmpfs  
> 910M 0 910M 0% /sys/fs/cgroup /dev/sda1 1014M  
> 236M 779M 24% /boot tmpfs 182M 4.0K 182M 1%  
> /run/user/42 tmpfs 182M 20K 182M 1%  
> /run/user/0