1. centos 扩展磁盘分区
- 1.1 系统环境
- vmware
- centos 7.9
2.扩展步骤
2.1 步骤一
关机状态下在设置->硬盘->扩展->选择硬盘大小; 我这里选择扩展到50G
2.2 步骤二
- 进入系统内部执行命令扩展磁盘大小，主要是创建逻辑卷(PVC)/物理卷(PV),从逻辑卷(LV)映射到物理卷(PV):
df -mh fdisk -l pvcreate /dev/sda3 vgextend centos /dev/sda3 vgs pvdisplay lvextend -L +29.9G /dev/mapper/centos-root xfs_growfs /dev/mapper/centos-root df -mh
2.2.1 执行扩展示例
root@localhost ~ # df -mh
Filesystem Size Used Avail Use% Mounted on
devtmpfs 969M 0 969M 0% /dev
tmpfs 980M 0 980M 0% /dev/shm
tmpfs 980M 9.9M 970M 2% /run
tmpfs 980M 0 980M 0% /sys/fs/cgroup
/dev/mapper/centos-root 17G 14G 3.3G 81% /
/dev/sda1 1014M 299M 716M 30% /boot
overlay 17G 14G 3.3G 81% /var/lib/docker/overlay2/0971f73c015ca770356f4ba4b30afeaf8a5bab897787d00fb12e976013c816b4/merged
overlay 17G 14G 3.3G 81% /var/lib/docker/overlay2/080f5771c97382cba9de40fc04cc449d661831cb6404d1165ba5f9d94ff097a4/merged
overlay 17G 14G 3.3G 81% /var/lib/docker/overlay2/418d6d02082ce2c868843e06cf9bbcefc8d854620a779e5d40c9e818ddc9ff8b/merged
overlay 17G 14G 3.3G 81% /var/lib/docker/overlay2/1a3310ec1ffe14dc972c46ecc56cae627c66ac6ea22d8ec86a7ee341ab395a3a/merged
shm 64M 0 64M 0% /var/lib/docker/containers/89721e8e469f187ee631632a86e158c752ae93b901bdc968567231797e24d6f0/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/65e865a368434ff6d6ead1bd3eae5566dc3c75eeb8b747ec6bebc046a6d94d14/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/2be6579cd347c2b993e85cd17289dc6205aeb0fa2e566e99893b31c66fc6ea37/mounts/shm
shm 64M 16K 64M 1% /var/lib/docker/containers/039aef669459f804f306b710b845c090efcad0a0359cc9aa3428580dc0117b2b/mounts/shm
tmpfs 196M 0 196M 0% /run/user/0
root@localhost ~ # fdisk -l
root@localhost ~ # pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.
root@localhost ~ # vgextend centos /dev/sda3
Volume group "centos" successfully extended
root@localhost ~ # vgs
VG #PV #LV #SN Attr VSize VFree
centos 2 2 0 wz--n- 48.99g <30.00g
root@localhost ~ # 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 48.99 GiB
PE Size 4.00 MiB
Total PE 12542
Alloc PE / Size 4863 / <19.00 GiB
Free PE / Size 7679 / <30.00 GiB
VG UUID vFfONo-DxPv-pnCQ-lPtz-3gCe-8dqz-dqFywm
root@localhost ~ # pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size <19.00 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4863
Free PE 0
Allocated PE 4863
PV UUID tiJXzP-GDDT-o2Nb-M3sZ-LjpH-mJhD-82rx1B
--- Physical volume ---
PV Name /dev/sda3
VG Name centos
PV Size 30.00 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 7679
Free PE 7679
Allocated PE 0
PV UUID 0tXB8b-zDVW-f0xz-7zpy-sfhc-A7dh-29te0U
root@localhost ~ # lvextend -L +29.9G /dev/mapper/centos-root
Rounding size to boundary between physical extents: 29.90 GiB.
Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <46.90 GiB (12006 extents).
Logical volume centos/root successfully resized.
# resize2fs /dev/mapper/centos-root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.
root@localhost ~ # xfs_growfs /dev/mapper/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
data blocks changed from 4455424 to 12294144
root@localhost ~ # df -mh
Filesystem Size Used Avail Use% Mounted on
devtmpfs 969M 0 969M 0% /dev
tmpfs 980M 0 980M 0% /dev/shm
tmpfs 980M 9.9M 970M 2% /run
tmpfs 980M 0 980M 0% /sys/fs/cgroup
/dev/mapper/centos-root 47G 14G 34G 30% /
/dev/sda1 1014M 299M 716M 30% /boot
overlay 47G 14G 34G 30% /var/lib/docker/overlay2/0971f73c015ca770356f4ba4b30afeaf8a5bab897787d00fb12e976013c816b4/merged
overlay 47G 14G 34G 30% /var/lib/docker/overlay2/080f5771c97382cba9de40fc04cc449d661831cb6404d1165ba5f9d94ff097a4/merged
overlay 47G 14G 34G 30% /var/lib/docker/overlay2/418d6d02082ce2c868843e06cf9bbcefc8d854620a779e5d40c9e818ddc9ff8b/merged
overlay 47G 14G 34G 30% /var/lib/docker/overlay2/1a3310ec1ffe14dc972c46ecc56cae627c66ac6ea22d8ec86a7ee341ab395a3a/merged
shm 64M 0 64M 0% /var/lib/docker/containers/89721e8e469f187ee631632a86e158c752ae93b901bdc968567231797e24d6f0/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/65e865a368434ff6d6ead1bd3eae5566dc3c75eeb8b747ec6bebc046a6d94d14/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/2be6579cd347c2b993e85cd17289dc6205aeb0fa2e566e99893b31c66fc6ea37/mounts/shm
shm 64M 16K 64M 1% /var/lib/docker/containers/039aef669459f804f306b710b845c090efcad0a0359cc9aa3428580dc0117b2b/mounts/shm
tmpfs 196M 0 196M 0% /run/user/0