- A+
所属分类：linux技术
- 查看分区大小和挂载情况 用到的命令df、lsblk
[root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 99G 96G 3.9G 97% / devtmpfs 3.8G 0 3.8G 0% /dev tmpfs 3.9G 33M 3.8G 1% /dev/shm tmpfs 3.9G 27M 3.8G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/vda1 1014M 189M 826M 19% /boot tmpfs 6.4G 0 6.4G 0% /run/user/0 [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sr0 11:0 1 1024M 0 rom vda 252:0 0 200G 0 disk ├─vda1 252:1 0 1G 0 part /boot └─vda2 252:2 0 99G 0 part └─centos-root 253:0 0 99G 0 lvm / 
- 又原来的100G 调整虚拟机磁盘为200G 直接调整。
- 创建分区
Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): p Disk /dev/vda: 214.7 GB, 214748364800 bytes, 419430400 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 Disk label type: dos Disk identifier: 0x000a727a Device Boot Start End Blocks Id System /dev/vda1 * 2048 2099199 1048576 83 Linux /dev/vda2 2099200 209715199 103808000 8e Linux LVM Command (m for help): n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p Partition number (3,4, default 3): 3 First sector (209715200-419430399, default 209715200): Using default value 209715200 Last sector, +sectors or +size{K,M,G} (209715200-419430399, default 419430399): Using default value 419430399 Partition 3 of type Linux and of size 100 GiB is set Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks. [root@localhost ~]# 
- 刷新分区并创建物理卷
[root@localhost ~]# partprobe /dev/vda [root@localhost ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sr0 11:0 1 1024M 0 rom vda 252:0 0 200G 0 disk ├─vda1 252:1 0 1G 0 part /boot ├─vda2 252:2 0 99G 0 part │ └─centos-root 253:0 0 99G 0 lvm / └─vda3 252:3 0 100G 0 part [root@localhost ~]# partprobe /dev/vda3 - 查看卷组名称，以及卷组使用情况
[root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 2 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size <99.00 GiB PE Size 4.00 MiB Total PE 25343 Alloc PE / Size 25343 / <99.00 GiB Free PE / Size 0 / 0 VG UUID wEdhD1-PJnZ-gSBB-ZE4X-pMKK-Obor-b7JnO2 6.扩展卷组
[root@localhost ~]# vgextend centos /dev/vda3 Physical volume "/dev/vda3" successfully created. Volume group "centos" successfully extended 7.查看当前逻辑卷
[root@localhost ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID q9mens-Ujcs-Kgzq-Gbtd-gEdF-D6x7-Oa3GmP LV Write Access read/write LV Creation host, time localhost, 2020-01-13 11:17:40 +0800 LV Status available # open 1 LV Size <99.00 GiB Current LE 25343 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 8.将“VG Name centos”卷组中的空闲空间扩展到根分区逻辑卷
[root@localhost ~]# lvextend -l +100%FREE /dev/centos/root Size of logical volume centos/root changed from <99.00 GiB (25343 extents) to 198.99 GiB (50942 extents). Logical volume centos/root successfully resized. 9.刷新根分区
[root@localhost ~]# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=6487808 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=25951232, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=12671, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 25951232 to 52164608 
