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邏輯捲軸管理

縮小LV及掛載檔案系統大小 [root@instructor ~]# umount /dev/dywvg/dywlv [root@instructor ~]# resize2fs -f /dev/dywvg/dywlv 900M resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/dywvg/dywlv to 230400 (4k) blocks. The filesystem on /dev/dywvg/dywlv is now 230400 blocks long. [root@instructor ~]# fsck /dev/mapper/dywvg-dywlv fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) /dev/mapper/dywvg-dywlv: clean, 2956/79680 files, 22474/311296 blocks [root@instructor ~]# lvresize -L 900M /dev/dywvg/dywlv Rounding up size to full physical extent 928.00 MiB WARNING: Reducing active logical volume to 928.00 MiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce dywlv? [y/n]: y Reducing logical volume dywlv to 928.00 MiB Logical volume dywlv successfully resized [root@instructor ~]# mount /dev/dywvg/dywlv /mnt/dywlvm/ [root@instructor ~]# df -h /mnt/dywlvm/ Filesystem Size Used Avail Use% Mounted on /dev/mapper/dywvg-dywlv 885M 68M 776M 9% /mnt/dywlvm [root@instructor ~]# ll /mnt/dywlvm/ total 16 drwxr-xr-x. 125 root root 12288 Jul 11 08:17 etc drwx------. 2 root root 4096 Jul 10 21:45 lost+found 放大LV及掛載檔案系統大小 [root@instructor ~]# lvresize -L 1200M /dev/dywvg/dywlv Rounding up size to full physical extent 1.19 GiB Extending logical volume dywlv to 1.19 GiB Logical volume dywlv successfully resized [root@instructor ~]# resize2fs -f /dev/dywvg/dywlv resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/dywvg/dywlv is mounted on /mnt/dywlvm; on-line resizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/dywvg/dywlv to 311296 (4k) blocks. The filesystem on /dev/dywvg/dywlv is now 311296 blocks long. [root@instructor ~]# df -h /mnt/dywlvm/ Filesystem Size Used Avail Use% Mounted on /dev/mapper/dywvg-dywlv 1.2G 69M 1.1G 6% /mnt/dywlvm [root@instructor ~]# ll /mnt/dywlvm/ total 16 drwxr-xr-x. 125 root root 12288 Jul 11 08:17 etc drwx------. 2 root root 4096 Jul 10 21:45 lost+found 以 lvresize 指令一次完成放大或縮小。特別注意﹗lv 放大縮小應先卸載，但根目錄無法卸載，且 lvm 相關命令在 /sbin 目錄下，直接將掛載根目錄 / 的分割區，做放大縮小，風險非常高，可能造成資料的損壞。 [root@kvm8 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_kvmusb-root 1.1G 708M 321M 69% / tmpfs 499M 0 499M 0% /dev/shm /dev/vda1 93M 26M 63M 29% /boot /dev/mapper/vg_kvmhome-vo 20M 4.6M 14M 25% /home [root@kvm8 ~]# lvresize -L 90M -r /dev/mapper/vg_kvmhome-vo fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) /dev/mapper/vg_kvmhome-vo is mounted. WARNING!!! The filesystem is mounted. If you continue you ***WILL*** cause ***SEVERE*** filesystem damage. Do you really want to continue (y/n)? yes /dev/mapper/vg_kvmhome-vo: recovering journal /dev/mapper/vg_kvmhome-vo: clean, 11/6144 files, 5404/20480 blocks Extending logical volume vo to 90.00 MiB Logical volume vo successfully resized resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/dm-2 is mounted on /home; on-line resizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/dm-2 to 92160 (1k) blocks. The filesystem on /dev/dm-2 is now 92160 blocks long. [root@kvm8 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_kvmusb-root 1.1G 708M 321M 69% / tmpfs 499M 0 499M 0% /dev/shm /dev/vda1 93M 26M 63M 29% /boot /dev/mapper/vg_kvmhome-vo 87M 5.6M 78M 7% /home [root@kvm8 ~]# umount /dev/mapper/vg_kvmhome-vo [root@kvm8 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_kvmusb-root 1.1G 708M 321M 69% / tmpfs 499M 0 499M 0% /dev/shm /dev/vda1 93M 26M 63M 29% /boot [root@kvm8 ~]# lvresize -L 20M -r /dev/mapper/vg_kvmhome-vo fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) /dev/mapper/vg_kvmhome-vo: clean, 11/24576 files, 8758/92160 blocks resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/dm-2 to 20480 (1k) blocks. The filesystem on /dev/dm-2 is now 20480 blocks long. Reducing logical volume vo to 20.00 MiB Logical volume vo successfully resized [root@kvm8 ~]# mount -a [root@kvm8 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_kvmusb-root 1.1G 708M 321M 69% / tmpfs 499M 0 499M 0% /dev/shm /dev/vda1 93M 26M 63M 29% /boot /dev/mapper/vg_kvmhome-vo 20M 4.6M 14M 25% /home 新增 LVM partitions 到 VG [root@instructor ~]# fdisk -c /dev/sda Command (m for help): p Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2bd2c32a Device Boot Start End Blocks Id System /dev/sda1 * 1 17 131072 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 17 4096 32768000 8e Linux LVM /dev/sda3 4096 6646 20480000 8e Linux LVM /dev/sda4 6646 60802 435006464 5 Extended /dev/sda5 6646 7952 10485760 83 Linux /dev/sda6 7952 10563 20979362 8e Linux LVM /dev/sda7 10564 11869 10490413+ 8e Linux LVM /dev/sda8 11870 12001 1060258+ 8e Linux LVM /dev/sda9 12002 12133 1060258+ 8e Linux LVM Command (m for help): n First cylinder (12134-60802, default 12134): Using default value 12134 Last cylinder, +cylinders or +size{K,M,G} (12134-60802, default 60802): +2G Command (m for help): p Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2bd2c32a Device Boot Start End Blocks Id System /dev/sda1 * 1 17 131072 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 17 4096 32768000 8e Linux LVM /dev/sda3 4096 6646 20480000 8e Linux LVM /dev/sda4 6646 60802 435006464 5 Extended /dev/sda5 6646 7952 10485760 83 Linux /dev/sda6 7952 10563 20979362 8e Linux LVM /dev/sda7 10564 11869 10490413+ 8e Linux LVM /dev/sda8 11870 12001 1060258+ 8e Linux LVM /dev/sda9 12002 12133 1060258+ 8e Linux LVM /dev/sda10 12134 12395 2104483+ 83 Linux Command (m for help): t Partition number (1-10): 10 Hex code (type L to list codes): 8e Changed system type of partition 10 to 8e (Linux LVM) Command (m for help): p Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2bd2c32a Device Boot Start End Blocks Id System /dev/sda1 * 1 17 131072 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 17 4096 32768000 8e Linux LVM /dev/sda3 4096 6646 20480000 8e Linux LVM /dev/sda4 6646 60802 435006464 5 Extended /dev/sda5 6646 7952 10485760 83 Linux /dev/sda6 7952 10563 20979362 8e Linux LVM /dev/sda7 10564 11869 10490413+ 8e Linux LVM /dev/sda8 11870 12001 1060258+ 8e Linux LVM /dev/sda9 12002 12133 1060258+ 8e Linux LVM /dev/sda10 12134 12395 2104483+ 8e Linux LVM Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks. [root@instructor ~]# partprobe Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes until after reboot. device-mapper: remove ioctl failed: Device or resource busy device-mapper: remove ioctl failed: Device or resource busy Warning: parted was unable to re-read the partition table on /dev/mapper/GLSguest-demo-real (Device or resource busy). This means Linux won't know anything about the modifications you made. [root@instructor ~]# reboot [root@instructor ~]# fdisk -l /dev/sda Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x2bd2c32a Device Boot Start End Blocks Id System /dev/sda1 * 1 17 131072 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 17 4096 32768000 8e Linux LVM /dev/sda3 4096 6646 20480000 8e Linux LVM /dev/sda4 6646 60802 435006464 5 Extended /dev/sda5 6646 7952 10485760 83 Linux /dev/sda6 7952 10563 20979362 8e Linux LVM /dev/sda7 10564 11869 10490413+ 8e Linux LVM /dev/sda8 11870 12001 1060258+ 8e Linux LVM /dev/sda9 12002 12133 1060258+ 8e Linux LVM /dev/sda10 12134 12395 2104483+ 8e Linux LVM [root@instructor ~]# pvscan PV /dev/sda8 VG dywvg lvm2 [1.00 GiB / 0 free] PV /dev/sda9 VG dywvg lvm2 [1.00 GiB / 832.00 MiB free] PV /dev/sda3 VG GLSguest lvm2 [19.50 GiB / 5.00 GiB free] PV /dev/sda2 VG GLSvg lvm2 [31.22 GiB / 0 free] PV /dev/sda6 VG GLSvg lvm2 [20.00 GiB / 6.44 GiB free] PV /dev/sda7 VG GLSvg lvm2 [10.00 GiB / 10.00 GiB free] Total: 6 [82.72 GiB] / in use: 6 [82.72 GiB] / in no VG: 0 [0 ] [root@instructor ~]# pvcreate /dev/sda10 Physical volume "/dev/sda10" successfully created [root@instructor ~]# pvscan PV /dev/sda8 VG dywvg lvm2 [1.00 GiB / 0 free] PV /dev/sda9 VG dywvg lvm2 [1.00 GiB / 832.00 MiB free] PV /dev/sda3 VG GLSguest lvm2 [19.50 GiB / 5.00 GiB free] PV /dev/sda2 VG GLSvg lvm2 [31.22 GiB / 0 free] PV /dev/sda6 VG GLSvg lvm2 [20.00 GiB / 6.44 GiB free] PV /dev/sda7 VG GLSvg lvm2 [10.00 GiB / 10.00 GiB free] PV /dev/sda10 lvm2 [2.01 GiB] Total: 7 [84.73 GiB] / in use: 6 [82.72 GiB] / in no VG: 1 [2.01 GiB] [root@instructor ~]# vgextend dywvg /dev/sda10 Volume group "dywvg" successfully extended [root@instructor ~]# pvscan PV /dev/sda8 VG dywvg lvm2 [1.00 GiB / 0 free] PV /dev/sda9 VG dywvg lvm2 [1.00 GiB / 832.00 MiB free] PV /dev/sda10 VG dywvg lvm2 [2.00 GiB / 2.00 GiB free] PV /dev/sda3 VG GLSguest lvm2 [19.50 GiB / 5.00 GiB free] PV /dev/sda2 VG GLSvg lvm2 [31.22 GiB / 0 free][root@instructor ~]# vgdisplay --- Volume group --- VG Name dywvg System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 19 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 3 Act PV 3 VG Size 4.00 GiB PE Size 32.00 MiB Total PE 128 Alloc PE / Size 38 / 1.19 GiB Free PE / Size 90 / 2.81 GiB VG UUID UztTCr-6SxE-x3eL-SR4P-fSEp-yswl-awaCJg PV /dev/sda6 VG GLSvg lvm2 [20.00 GiB / 6.44 GiB free] PV /dev/sda7 VG GLSvg lvm2 [10.00 GiB / 10.00 GiB free] Total: 7 [84.72 GiB] / in use: 7 [84.72 GiB] / in no VG: 0 [0 ] 從 VG 移除 PV partition [root@instructor ~]# pvmove /dev/sda8 /dev/sda10 /dev/sda8: Moved: 6.2% /dev/sda8: Moved: 65.6% /dev/sda8: Moved: 100.0% [root@instructor ~]# vgreduce dywvg /dev/sda8 Removed "/dev/sda8" from volume group "dywvg" [root@instructor ~]# pvscan PV /dev/sda9 VG dywvg lvm2 [1.00 GiB / 832.00 MiB free] PV /dev/sda10 VG dywvg lvm2 [2.00 GiB / 1.00 GiB free] PV /dev/sda3 VG GLSguest lvm2 [19.50 GiB / 5.00 GiB free] PV /dev/sda2 VG GLSvg lvm2 [31.22 GiB / 0 free] PV /dev/sda6 VG GLSvg lvm2 [20.00 GiB / 6.44 GiB free] PV /dev/sda7 VG GLSvg lvm2 [10.00 GiB / 10.00 GiB free] PV /dev/sda8 lvm2 [1.01 GiB] Total: 7 [84.73 GiB] / in use: 6 [83.72 GiB] / in no VG: 1 [1.01 GiB] [root@instructor ~]# pvremove /dev/sda8 Labels on physical volume "/dev/sda8" successfully wiped [root@instructor ~]# pvscan PV /dev/sda9 VG dywvg lvm2 [1.00 GiB / 832.00 MiB free] PV /dev/sda10 VG dywvg lvm2 [2.00 GiB / 1.00 GiB free] PV /dev/sda3 VG GLSguest lvm2 [19.50 GiB / 5.00 GiB free] PV /dev/sda2 VG GLSvg lvm2 [31.22 GiB / 0 free] PV /dev/sda6 VG GLSvg lvm2 [20.00 GiB / 6.44 GiB free] PV /dev/sda7 VG GLSvg lvm2 [10.00 GiB / 10.00 GiB free] Total: 6 [83.72 GiB] / in use: 6 [83.72 GiB] / in no VG: 0 [0 ] [root@instructor ~]# ll /mnt/dywlvm/ total 16 drwxr-xr-x. 125 root root 12288 Jul 11 08:17 etc drwx------. 2 root root 4096 Jul 10 21:45 lost+found 2015-04-13