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lvm

lvm​

centos7扩容/目录​

汇总命令：

lsblk;df -hT

pvcreate /dev/sdb
vgextend centos /dev/sdb
lvextend -L +19G /dev/centos/root 
xfs_growfs /dev/centos/root 

lsblk;df -hT

扩容过程：

[root@devops8 k8s]#df -hT
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        17G  8.2G  8.8G  49% /
devtmpfs                devtmpfs  7.8G     0  7.8G   0% /dev
tmpfs                   tmpfs     7.8G     0  7.8G   0% /dev/shm
tmpfs                   tmpfs     7.8G   12M  7.8G   1% /run
tmpfs                   tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/sda1               xfs      1014M  146M  869M  15% /boot
tmpfs                   tmpfs     1.6G     0  1.6G   0% /run/user/0
overlay                 overlay    17G  8.2G  8.8G  49% /var/lib/docker/overlay2/800c273181c01ff9dfac4031c57d3403244958b85fad5737db77a4a1a906f875/merged
overlay                 overlay    17G  8.2G  8.8G  49% /var/lib/docker/overlay2/e7f299bd0d54fa558793cfb0e785a84c7e70a77cafda0ef51af987b78275c7c4/merged
overlay                 overlay    17G  8.2G  8.8G  49% /var/lib/docker/overlay2/3c36a8b71024089abf15e2d2cd1c0ed844b9c33138fb3202589002aae3254f93/merged
[root@devops8 k8s]#lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part 
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   20G  0 disk 
sr0              11:0    1 1024M  0 rom  


[root@devops8 k8s]#pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.
[root@devops8 k8s]#vgextend centos /dev/sdb
  Volume group "centos" successfully extended
[root@devops8 k8s]#lvextend -L +19G /dev/centos/root 
  Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <36.00 GiB (9215 extents).
  Logical volume centos/root successfully resized.
[root@devops8 k8s]#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
data blocks changed from 4455424 to 9436160
[root@devops8 k8s]#df -hT
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        36G  8.2G   28G  23% /
devtmpfs                devtmpfs  7.8G     0  7.8G   0% /dev
tmpfs                   tmpfs     7.8G     0  7.8G   0% /dev/shm
tmpfs                   tmpfs     7.8G   12M  7.8G   1% /run
tmpfs                   tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/sda1               xfs      1014M  146M  869M  15% /boot
tmpfs                   tmpfs     1.6G     0  1.6G   0% /run/user/0
overlay                 overlay    36G  8.2G   28G  23% /var/lib/docker/overlay2/800c273181c01ff9dfac4031c57d3403244958b85fad5737db77a4a1a906f875/merged
overlay                 overlay    36G  8.2G   28G  23% /var/lib/docker/overlay2/e7f299bd0d54fa558793cfb0e785a84c7e70a77cafda0ef51af987b78275c7c4/merged
overlay                 overlay    36G  8.2G   28G  23% /var/lib/docker/overlay2/3c36a8b71024089abf15e2d2cd1c0ed844b9c33138fb3202589002aae3254f93/merged
[root@devops8 k8s]#
0%