Linux LVM系列(四)vg扩容和lv扩容
2017-12-08 00:59
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上篇是lv卷的大小扩容,本篇是怎样给卷组增加容量和对lv在线扩容
增加磁盘(略)
快速分区
手动更新分区表
列出分区
**
创建PV
lv扩容
这里是比较简单的扩容,直接把新分区给加了进去
更新lv挂载卷前
更新lv挂载信息(这步很重要)
更新后
增加磁盘(略)
快速分区
[root@aiker01 ~]# fdisk /dev/sdb Command (m for help): n All primary partitions are in use Adding logical partition 8 First sector (25176064-41943039, default 25176064): Using default value 25176064 Last sector, +sectors or +size{K,M,G} (25176064-41943039, default 41943039): +2G Partition 8 of type Linux and of size 2 GiB is set Command (m for help): t Partition number (1-8, default 8): Hex code (type L to list all codes): 8e Changed type of partition 'Linux' to 'Linux LVM' Command (m for help): w The partition table has been altered!
手动更新分区表
[root@aiker01 ~]# partprobe
列出分区
**[root@aiker01 ~]# parted -l
Model: VMware, VMware Virtual S (scsi) Disk /dev/sdb: 21.5GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 2149MB 2147MB primary lvm 2 2149MB 4296MB 2147MB primary lvm 3 4296MB 6443MB 2147MB primary lvm 4 6443MB 21.5GB 15.0GB extended 5 6445MB 8592MB 2147MB logical lvm 6 8593MB 10.7GB 2147MB logical lvm 7 10.7GB 12.9GB 2147MB logical lvm 8 12.9GB 15.0GB 2147MB logical lvm
**
创建PV
[root@aiker01 ~]# pvcreate /dev/sdb8 Physical volume "/dev/sdb8" successfully created. **vg扩展** [root@aiker01 ~]# vgextend vg1 /dev/sdb8 Volume group "vg1" successfully extended
[root@aiker01 ~]# vgdisplay vg1 --- Volume group --- VG Name vg1 System ID Format lvm2 Metadata Areas 4 Metadata Sequence No 26 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 4 Act PV 4 VG Size 7.98 GiB PE Size 4.00 MiB Total PE 2044 Alloc PE / Size 1152 / 4.50 GiB Free PE / Size 892 / 3.48 GiB VG UUID dx3XD9-rQBV-QtBu-EebN-wgjI-CQcn-36iIbm
lv扩容
这里是比较简单的扩容,直接把新分区给加了进去
[root@aiker01 ~]# lvextend /dev/vg1/lv1 /dev/sdb8 Size of logical volume vg1/lv1 changed from 4.50 GiB (1152 extents) to <6.50 GiB (1663 extents). Logical volume vg1/lv1 successfully resized. [root@aiker01 ~]# lvdisplay /dev/vg1/lv1 --- Logical volume --- LV Path /dev/vg1/lv1 LV Name lv1 VG Name vg1 LV UUID q6dAzJ-1dbC-2EoY-Fzcp-QqEE-enuU-FS5BLT LV Write Access read/write LV Creation host, time aiker01, 2017-12-06 03:02:40 +0800 LV Status available # open 1 LV Size <6.50 GiB Current LE 1663 Segments 4 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:4
更新lv挂载卷前
[root@aiker01 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/cl-root xfs 8.6G 5.3G 3.4G 62% / devtmpfs devtmpfs 2.4G 0 2.4G 0% /dev tmpfs tmpfs 2.4G 0 2.4G 0% /dev/shm tmpfs tmpfs 2.4G 8.7M 2.4G 1% /run tmpfs tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup /dev/mapper/cl-home xfs 4.0G 33M 4.0G 1% /home /dev/mapper/cl-var xfs 3.0G 159M 2.8G 6% /var /dev/sda2 xfs 497M 132M 366M 27% /boot tmpfs tmpfs 479M 0 479M 0% /run/user/0 /dev/mapper/vg2-lv2 ext4 3.9G 16M 3.7G 1% /data /dev/mapper/vg1-lv1 ext4 4.4G 16M 4.2G 1% /mnt
更新lv挂载信息(这步很重要)
[root@aiker01 ~]# resize2fs /dev/mapper/vg1-lv1 #xfs文件系统不适用,xfs文件系统需要执行xfs_growfs /dev/vg1/lv1 xfs ![](http://i2.51cto.com/images/blog/201712/08/f4977ad91fc0c475ced44d60e51dc25a.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=) resize2fs 1.42.9 (28-Dec-2013) Filesystem at /dev/mapper/vg1-lv1 is mounted on /mnt; on-line resizing required old_desc_blocks = 1, new_desc_blocks = 1 The filesystem on /dev/mapper/vg1-lv1 is now 1702912 blocks long.
更新后
[root@aiker01 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/cl-root xfs 8.6G 5.3G 3.4G 62% / devtmpfs devtmpfs 2.4G 0 2.4G 0% /dev tmpfs tmpfs 2.4G 0 2.4G 0% /dev/shm tmpfs tmpfs 2.4G 8.7M 2.4G 1% /run tmpfs tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup /dev/mapper/cl-home xfs 4.0G 33M 4.0G 1% /home /dev/mapper/cl-var xfs 3.0G 159M 2.8G 6% /var /dev/sda2 xfs 497M 132M 366M 27% /boot tmpfs tmpfs 479M 0 479M 0% /run/user/0 /dev/mapper/vg2-lv2 ext4 3.9G 16M 3.7G 1% /data /dev/mapper/vg1-lv1 ext4 6.4G 18M 6.1G 1% /mnt [root@aiker01 ~]# ll /mnt/ total 36 -rw-r--r-- 1 root root 9 Dec 7 02:26 1.txt -rw-r--r-- 1 root root 9 Dec 7 02:26 2.txt drwxr-xr-x 2 root root 4096 Dec 7 02:34 6 [root@aiker01 ~]# cat /mnt/1.txt 12345678
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