CentOS7根目錄磁盤擴容(/dev/mapper/centos-root 空間不足)

 

今天在給測試環境搭建k8s系統時,發現master根目錄磁盤空間不足,須要擴容,記錄以下。node

# 查看根分區大小 [root@master ~]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 63G 0   63G   0% /dev tmpfs 63G 0   63G   0% /dev/shm tmpfs 63G 1.3G   62G   2% /run tmpfs 63G 0   63G   0% /sys/fs/cgroup /dev/mapper/cl_geekthings-root   50G   38G   13G  76% /
/dev/sda1                      1014M  311M  704M  31% /boot
/dev/mapper/cl_geekthings-home  918G   12G  906G   2% /home tmpfs 13G 12K 13G 1% /run/user/42 tmpfs 13G 0   13G   0% /run/user/0 overlay 50G 38G 13G 76% /var/lib/docker/overlay2/70dffe831895bb55d79b4a8f483364a4f736637ccb2f6694f1cf82ba7ff1743d/merged # 查看磁盤編號 [root@master ~]# ls /dev/sd* /dev/sda  /dev/sda1  /dev/sda2 # 這裏在vMware vCenter中新增一塊硬盤(編輯->新增設備) 再次查看磁盤 [root@master ~]# ls /dev/sd* /dev/sda  /dev/sda1  /dev/sda2  /dev/sdb # 建立pv [root@master ~]# pvcreate /dev/sdb Physical volume "/dev/sdb" successfully created.

# 查看vg組 [root@master ~]# vgs VG #PV #LV #SN Attr VSize VFree cl_geekthings 1   3   0 wz--n- <999.00g 4.00m # 擴展vg [root@master ~]# vgextend cl_geekthings /dev/sdb Volume group "cl_geekthings" successfully extended [root@master ~]# vgs VG #PV #LV #SN Attr VSize VFree cl_geekthings 2   3   0 wz--n- 1.17t 200.00g # 擴展lv [root@master ~]# lvextend -L +200G /dev/mapper/cl_geekthings-root Size of logical volume cl_geekthings/root changed from 50.00 GiB (12800 extents) to 250.00 GiB (64000 extents). Logical volume cl_geekthings/root successfully resized.

# 系統從新讀取大小 [root@master ~]# xfs_growfs /dev/mapper/cl_geekthings-root meta-data=/dev/mapper/cl_geekthings-root isize=512    agcount=4, agsize=3276800 blks =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0 data =                       bsize=4096   blocks=13107200, imaxpct=25
         =                       sunit=0      swidth=0 blks naming =version 2              bsize=4096   ascii-ci=0 ftype=1 log =internal               bsize=4096   blocks=6400, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 13107200 to 65536000

# 查看擴容是否成功 [root@master ~]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 63G 0   63G   0% /dev tmpfs 63G 0   63G   0% /dev/shm tmpfs 63G 1.3G   62G   2% /run tmpfs 63G 0   63G   0% /sys/fs/cgroup /dev/mapper/cl_geekthings-root 250G 38G 213G 16% /
/dev/sda1                      1014M  311M  704M  31% /boot
/dev/mapper/cl_geekthings-home  918G   12G  906G   2% /home tmpfs 13G 12K 13G 1% /run/user/42 tmpfs 13G 0   13G   0% /run/user/0 overlay 250G 38G 213G 16% /var/lib/docker/overlay2/70dffe831895bb55d79b4a8f483364a4f736637ccb2f6694f1cf82ba7ff1743d/merged [root@master ~]# lsblk NAME MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT sda 8:0    0  1000G  0 disk ├─sda1 8:1    0     1G  0 part /boot └─sda2 8:2    0   999G  0 part ├─cl_geekthings-root 253:0    0   250G  0 lvm  / ├─cl_geekthings-swap 253:1    0  31.5G  0 lvm └─cl_geekthings-home 253:2    0 917.5G  0 lvm  /home sdb 8:16   0   200G  0 disk └─cl_geekthings-root 253:0    0   250G  0 lvm  / sr0 11:0    1   4.1G  0 rom
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