21，lvm 線上擴容
阿新 • • 發佈：2020-12-04
LVM線上擴容： [root@centos7 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 9.3G 1.1G 8.3G 12% / devtmpfs 982M 0 982M 0% /dev tmpfs 993M 0 993M 0% /dev/shm tmpfs 993M 8.6M 984M 1% /run tmpfs 993M 0 993M 0% /sys/fs/cgroup /dev/sda1 197M 103M 95M 53% /boot tmpfs 199M 0 199M 0% /run/user/0 /dev/mapper/vg1_demo-lv1 27M 779K 24M 4% /app [root@centos7 ~]# dd if=/dev/zero of=/app/aa.txt bs=1M count=23 23+0 records in 23+0 records out 24117248 bytes (24 MB) copied, 0.0563617 s, 428 MB/s [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 9.3G 1.1G 8.3G 12% / devtmpfs 982M 0 982M 0% /dev tmpfs 993M 0 993M 0% /dev/shm tmpfs 993M 8.6M 984M 1% /run tmpfs 993M 0 993M 0% /sys/fs/cgroup /dev/sda1 197M 103M 95M 53% /boot tmpfs 199M 0 199M 0% /run/user/0 /dev/mapper/vg1_demo-lv1 27M 24M 1007K 97% /app [root@centos7 ~]# 擴容前先看下是否有剩餘的空間： [root@centos7 ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 2 0 wz--n- 9.80g 0 vg1_demo 2 1 0 wz--n- 544.00m 460.00m [root@centos7 ~]# lv擴容40M [root@centos7 ~]# lvextend -L +40M /dev/mapper/vg1_demo-lv1 lv擴容到40M [root@centos7 ~]# lvextend -L 40M /dev/mapper/vg1_demo-lv1 [root@centos7 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos -wi-ao---- 9.30g swap centos -wi-ao---- 512.00m lv1 vg1_demo -wi-ao---- 72.00m [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# lvextend -L +10M /dev/mapper/vg1_demo-lv1 Rounding size to boundary between physical extents: 12.00 MiB. Size of logical volume vg1_demo/lv1 changed from 72.00 MiB (18 extents) to 84.00 MiB (21 extents). Logical volume vg1_demo/lv1 successfully resized. [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos -wi-ao---- 9.30g swap centos -wi-ao---- 512.00m lv1 vg1_demo -wi-ao---- 84.00m [root@centos7 ~]# 擴容後需要對擴容的部分LV,線上格式化 [root@centos7 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 9.3G 1.1G 8.3G 12% / devtmpfs 982M 0 982M 0% /dev tmpfs 993M 0 993M 0% /dev/shm tmpfs 993M 8.6M 984M 1% /run tmpfs 993M 0 993M 0% /sys/fs/cgroup /dev/sda1 197M 103M 95M 53% /boot tmpfs 199M 0 199M 0% /run/user/0 /dev/mapper/vg1_demo-lv1 27M 24M 1007K 97% /app [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# resize2fs /dev/mapper/vg1_demo-lv1 注：如果是xfs 檔案系統就用：xfs_growfs /dev/mapper/vg1_demo-lv1 resize2fs 1.42.9 (28-Dec-2013) Filesystem at /dev/mapper/vg1_demo-lv1 is mounted on /app; on-line resizing required old_desc_blocks = 1, new_desc_blocks = 1 The filesystem on /dev/mapper/vg1_demo-lv1 is now 86016 blocks long. [root@centos7 ~]# [root@centos7 ~]# [root@centos7 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 9.3G 1.1G 8.3G 12% / devtmpfs 982M 0 982M 0% /dev tmpfs 993M 0 993M 0% /dev/shm tmpfs 993M 8.6M 984M 1% /run tmpfs 993M 0 993M 0% /sys/fs/cgroup /dev/sda1 197M 103M 95M 53% /boot tmpfs 199M 0 199M 0% /run/user/0 /dev/mapper/vg1_demo-lv1 78M 25M 49M 34% /app [root@centos7 ~]#