[linux] LVM 非根挂载点扩容（原磁盘扩容）
阿里云机器，ECS运行时磁盘由300G扩容到500G，重启机器生效后登录。可以看到/data目录总大小300G，/dev/vdb已经扩容到500G。
[root@HD1g-elasticsearch2 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 5.6G 32G 15% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 12K 3.9G 1% /dev/shm tmpfs 3.9G 380K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/mapper/vg_data-lv_data 300G 218G 83G 73% /data tmpfs 783M 0 783M 0% /run/user/1000 [root@HD1g-elasticsearch2 ~]# fdisk -l Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x0008d73a Device Boot Start End Blocks Id System /dev/vda1 * 2048 83884031 41940992 83 Linux Disk /dev/vdb: 536.9 GB, 536870912000 bytes, 1048576000 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 /dev/mapper/vg_data-lv_data: 322.1 GB, 322118352896 bytes, 629137408 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
1.pvs先查看已有的pv，再resize
[root@HD1g-elasticsearch2 ~]# pvs PV VG Fmt Attr PSize PFree /dev/vdb vg_data lvm2 a-- <300.00g 0 [root@HD1g-elasticsearch2 ~]# pvresize /dev/vdb Physical volume "/dev/vdb" changed 1 physical volume(s) resized / 0 physical volume(s) not resized [root@HD1g-elasticsearch2 ~]# pvs PV VG Fmt Attr PSize PFree /dev/vdb vg_data lvm2 a-- <500.00g 200.00g
2.vg大小随pvresize而变
vgs原大小在pvresize之前才能看到 [root@HD1g-elasticsearch2 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_data 1 1 0 wz--n- <300.00g 0 pvresize后vg自动扩容了 [root@HD1g-elasticsearch2 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_data 1 1 0 wz--n- <500.00g 200.00g
3.查看要扩容的lv，获取要扩容的LV Path
[root@HD1g-elasticsearch2 ~]# lvdisplay --- Logical volume --- LV Path /dev/vg_data/lv_data LV Name lv_data VG Name vg_data LV UUID 4Ncz4O-016I-Vh8u-vmOT-BZ7W-ARiy-fCHO4s LV Write Access read/write LV Creation host, time HD1g-elk-elastic2, 2018-09-06 14:34:31 +0800 LV Status available # open 1 LV Size <300.00 GiB Current LE 76799 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 252:0 [root@HD1g-elasticsearch2 ~]# lvextend -l +100%FREE /dev/vg_data/lv_data Size of logical volume vg_data/lv_data changed from <300.00 GiB (76799 extents) to <500.00 GiB (127999 extents). Logical volume vg_data/lv_data successfully resized. [root@HD1g-elasticsearch2 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lv_data vg_data -wi-ao---- <500.00g
4.查看原挂载节点文件系统格式，选用命令resize挂载点大小，xfs文件系统用xfs_growfs，ext*文件系统用resize2fs
[root@HD1g-elasticsearch2 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/vda1 ext4 40G 5.6G 32G 15% / devtmpfs devtmpfs 3.9G 0 3.9G 0% /dev tmpfs tmpfs 3.9G 12K 3.9G 1% /dev/shm tmpfs tmpfs 3.9G 380K 3.9G 1% /run tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/mapper/vg_data-lv_data xfs 300G 218G 83G 73% /data tmpfs tmpfs 783M 0 783M 0% /run/user/1000 [root@HD1g-elasticsearch2 ~]# xfs_growfs /dev/vg_data/lv_data meta-data=/dev/mapper/vg_data-lv_data isize=512 agcount=7, agsize=13106944 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=78642176, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=25599, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 78642176 to 131070976 [root@HD1g-elasticsearch2 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/vda1 40G 5.6G 32G 15% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 12K 3.9G 1% /dev/shm tmpfs 3.9G 380K 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/mapper/vg_data-lv_data 500G 218G 283G 44% /data tmpfs 783M 0 783M 0% /run/user/1000
