linux動(dòng)態(tài)增加LV空間的方法
發(fā)布日期：2022-01-01 19:53 | 文章來(lái)源：站長(zhǎng)之家
一直都說(shuō)LVM可以在線增加空間，一直都沒(méi)有試過(guò)
下面小試一下：
1.增加硬盤
2.創(chuàng)建PV
3.添加PV到VG
4.擴(kuò)展LV
1.增加硬盤
該干嘛干嘛
添加后需要重啟（有知道不用重啟的辦法嗎）
--這個(gè)是新添加的硬盤 [root@localhost ~]# fdisk -l /dev/sdb Disk /dev/sdb: 5368 MB, 5368709120 bytes 255 heads, 63 sectors/track, 652 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sdb doesn't contain a valid partition table
2.創(chuàng)建PV
--命令很簡(jiǎn)單
--命令很簡(jiǎn)單 [root@localhost ~]# pvcreate /dev/sdb Physical volume "/dev/sdb" successfully created --可以看到新的PV了 [root@localhost ~]# pvdisplay /dev/hdc: open failed: No medium found --- Physical volume --- PV Name/dev/sda2 VG NameVolGroup00 PV Size9.90 GB / not usable 22.76 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 316 Free PE0 Allocated PE 316 PV UUIDn5fS6M-jBiH-n9vU-pBTd-iOCv-BbTe-BUeNZo "/dev/sdb" is a new physical volume of "5.00 GB" --- NEW Physical volume --- PV Name/dev/sdb VG Name PV Size5.00 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE0 Allocated PE 0 PV UUIDTDs3mN-3ON3-eHbl-cohr-7Hr3-8608-jiLlXG
3.添加PV到VG
--指定對(duì)應(yīng)的VG和PV [root@localhost ~]# vgextend VolGroup00 /dev/sdb Volume group "VolGroup00" successfully extended --看到新的5G添加到VG里面了，狀態(tài)是沒(méi)有分配 [root@localhost ~]# vgdisplay --- Volume group --- VG NameVolGroup00 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV2 Max PV 0 Cur PV 2 Act PV 2 VG Size14.84 GB PE Size32.00 MB Total PE 475 Alloc PE / Size 316 / 9.88 GB Free PE / Size 159 / 4.97 GB VG UUIDx1uyPD-qBgE-2yQV-T1Cb-IGIz-e4LB-fghf1W
4.擴(kuò)展LV
--先添加2G練手 [root@localhost ~]# lvextend -L +2G /dev/VolGroup00/LogVol00 Extending logical volume LogVol00 to 10.88 GB Logical volume LogVol00 successfully resized --成功后還未看到新的空間 [root@localhost ~]# df -m Filesystem 1M-blocksUsed Available Use% Mounted on /dev/mapper/VolGroup00-LogVol00 88047362 988 89% / --需要手動(dòng)刷新 [root@localhost ~]# resize2fs /dev/VolGroup00/LogVol00 resize2fs 1.39 (29-May-2006) Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required Performing an on-line resize of /dev/VolGroup00/LogVol00 to 2850816 (4k) blocks. The filesystem on /dev/VolGroup00/LogVol00 is now 2850816 blocks long. --現(xiàn)在就完成了 [root@localhost ~]# df -m Filesystem 1M-blocksUsed Available Use% Mounted on /dev/mapper/VolGroup00-LogVol001078873652867 72% /
若需要先縮小則使用以下命令：
lvreduce -L -20G /dev/mapper/vg_mysvr-lv_home
resize2fs /dev/mapper/vg_my-lv_home
lvextend -L +20G /dev/mapper/vg_mysvr-lv_root
resize2fs /dev/mapper/vg_mysvr-lv_root
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