Lvm
LVM 調整大小過程
從這裡開始，我如何在不失去數據的情況下調整 /usr、/var 和 /home 分區中的空間大小，如果可能的話，並且在正常模式（無恢復模式）下，因為是遠端伺服器。我看過其他文章（如何使用 mdadm 調整 RAID1 陣列的大小？、Linux：使用數據從分區創建軟體 RAID 1）和文件，但我不確定這個過程。謝謝。
rdw@u18702824:~$ df -h Filesystem Size Used Avail Use% Mounted on udev 7.8G 4.0K 7.8G 1% /dev tmpfs 1.6G 1.4M 1.6G 1% /run /dev/md1 4.0G 3.4G 549M 87% / none 4.0K 0 4.0K 0% /sys/fs/cgroup none 5.0M 0 5.0M 0% /run/lock none 7.8G 8.0K 7.8G 1% /run/shm none 100M 28K 100M 1% /run/user /dev/mapper/vg00-usr 4.8G 4.8G 0 100% /usr /dev/mapper/vg00-var 4.8G 2.5G 2.1G 55% /var /dev/mapper/vg00-home 4.8G 2.9G 1.8G 62% /home ====================================================== rdw@u18702824:~$ sudo mdadm --detail /dev/md1 /dev/md1: Version : 0.90 Creation Time : Mon Feb 6 14:19:22 2017 Raid Level : raid1 Array Size : 4194240 (4.00 GiB 4.29 GB) Used Dev Size : 4194240 (4.00 GiB 4.29 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Thu Feb 23 12:10:34 2017 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 3562dace:6f38a4cf:1f51fb89:78ee93fe Events : 0.72 Number Major Minor RaidDevice State 0 8 1 0 active sync /dev/sda1 1 8 17 1 active sync /dev/sdb1 ====================================================== rdw@u18702824:~$ sudo mdadm --detail /dev/md3 /dev/md3: Version : 0.90 Creation Time : Mon Feb 6 14:19:23 2017 Raid Level : raid1 Array Size : 1458846016 (1391.26 GiB 1493.86 GB) Used Dev Size : 1458846016 (1391.26 GiB 1493.86 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 3 Persistence : Superblock is persistent Update Time : Thu Feb 23 12:10:46 2017 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 52d90469:78a9a458:1f51fb89:78ee93fe Events : 0.1464 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3 ====================================================== rdw@u18702824:~$ sudo lvdisplay --- Logical volume --- LV Path /dev/vg00/usr LV Name usr VG Name vg00 LV UUID dwihnp-aXSl-rCly-MvlH-FoxI-hDrv-mDnVNJ LV Write Access read/write LV Creation host, time , LV Status available # open 1 LV Size 5.00 GiB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:0 --- Logical volume --- LV Path /dev/vg00/var LV Name var VG Name vg00 LV UUID I5eIwR-dunS-3ua2-IrSw-3C30-cxOS-zLj3a4 LV Write Access read/write LV Creation host, time , LV Status available # open 1 LV Size 5.00 GiB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:1 --- Logical volume --- LV Path /dev/vg00/home LV Name home VG Name vg00 LV UUID 4tYJyU-wlnF-qERG-95Wt-2rR4-Gyfs-NofCZd LV Write Access read/write LV Creation host, time , LV Status available # open 1 LV Size 5.00 GiB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:2 ====================================================== rdw@u18702824:~$ sudo vgdisplay --- Volume group --- VG Name vg00 System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 1 Act PV 1 VG Size 1.36 TiB PE Size 4.00 MiB Total PE 356163 Alloc PE / Size 3840 / 15.00 GiB Free PE / Size 352323 / 1.34 TiB VG UUID av08Kn-EzMV-2mie-HE97-cHcr-oL1x-qmYMz6 ====================================================== rdw@u18702824:~$ sudo lvscan ACTIVE '/dev/vg00/usr' [5.00 GiB] inherit ACTIVE '/dev/vg00/var' [5.00 GiB] inherit ACTIVE '/dev/vg00/home' [5.00 GiB] inherit rdw@u18702824:~$ sudo lvmdiskscan /dev/ram0 [ 64.00 MiB] /dev/vg00/usr [ 5.00 GiB] /dev/ram1 [ 64.00 MiB] /dev/md1 [ 4.00 GiB] /dev/vg00/var [ 5.00 GiB] /dev/ram2 [ 64.00 MiB] /dev/sda2 [ 2.00 GiB] /dev/vg00/home [ 5.00 GiB] /dev/ram3 [ 64.00 MiB] /dev/md3 [ 1.36 TiB] LVM physical volume /dev/ram4 [ 64.00 MiB] /dev/ram5 [ 64.00 MiB] /dev/ram6 [ 64.00 MiB] /dev/ram7 [ 64.00 MiB] /dev/ram8 [ 64.00 MiB] /dev/ram9 [ 64.00 MiB] /dev/ram10 [ 64.00 MiB] /dev/ram11 [ 64.00 MiB] /dev/ram12 [ 64.00 MiB] /dev/ram13 [ 64.00 MiB] /dev/ram14 [ 64.00 MiB] /dev/ram15 [ 64.00 MiB] /dev/sdb2 [ 2.00 GiB] 3 disks 19 partitions 0 LVM physical volume whole disks 1 LVM physical volume ====================================================== rdw@u18702824:~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md1 : active raid1 sdb1[1] sda1[0] 4194240 blocks [2/2] [UU] md3 : active raid1 sdb3[1] sda3[0] 1458846016 blocks [2/2] [UU] unused devices: <none>
因此，您的捲組有超過 1TB 的可用空間。
rdw@u18702824:~$ sudo vgdisplay --- Volume group --- VG Name vg00 ... VG Size 1.36 TiB PE Size 4.00 MiB Total PE 356163 Alloc PE / Size 3840 / 15.00 GiB Free PE / Size 352323 / 1.34 TiB如果你想再增加 10GB 到
/usr15GB，你應該使用這樣的命令（假設你的文件系統是 ext2,3 或 4）{ref}。lvextend -L+10G /dev/vg00/usr resize2fs /dev/vg00/usr