LVM:1.创建pv(物理卷) [iyunv@localhost dev]# pvcreate /dev/sdd /dev/sde /dev/sdf Writing physical volume data todisk "/dev/sdd" Physical volume"/dev/sdd" successfully created Writing physical volume data todisk "/dev/sde" Physical volume"/dev/sde" successfully created Writing physical volume data todisk "/dev/sdf" Physical volume"/dev/sdf" successfully created 查看物理卷: [iyunv@localhost dev]# pvdisplay -v /dev/sdd Using physical volume(s) oncommand line --- Physical volume --- PV Name /dev/sdd VG Name vg01 PV Size 8.00 GiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 2047 Free PE 2047 Allocated PE 0 PV UUID lTSpmW-BmZj-vuXj-Ouxx-v6H9-bV3k-f5xaZg
2.创建一个VG
VG名字为“vg01”,设备位置放在“/dev/vg01”,其中包含“/dev/sdd /dev/sde /dev/sdf”三个PV [iyunv@localhost dev]# vgcreate /dev/vg01 /dev/sdd /dev/sde /dev/sdf Volume group "vg01"successfully created 查看VG: [iyunv@localhost dev]# vgdisplay -v vg01 Using volume group(s) on commandline Finding volume group"vg01" --- Volume group --- VG Name vg01 System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 3 Act PV 3 VG Size 23.99 GiB PE Size 4.00 MiB Total PE 6141 Alloc PE / Size 0 / 0 Free PE / Size 6141 / 23.99 GiB VG UUID HvmwcQ-yUmr-71HP-RSaS-kQLs-T1gg-KTlGzb
--- Physical volumes --- PV Name /dev/sdd PV UUID lTSpmW-BmZj-vuXj-Ouxx-v6H9-bV3k-f5xaZg PV Status allocatable Total PE / Free PE 2047 / 2047
PV Name /dev/sde PV UUID y69gjf-x4oe-2hpt-iHR2-rt4Z-IpV4-AQvlhd PV Status allocatable Total PE / Free PE 2047 / 2047
PV Name /dev/sdf PV UUID shvndV-Xo73-4BcO-ogDE-bMFm-YS0Y-P339Lq PV Status allocatable Total PE / Free PE 2047 / 2047
3.创建LV[iyunv@localhost dev]# lvcreate -L 2G -n test_lv001 vg01 Logical volume"test_lv001" created [iyunv@localhost dev]# lvcreate -L 2G -n test_lv002 vg01 Logical volume"test_lv002" created [iyunv@localhost dev]# lvcreate -L 3G -n test_lv003 vg01 Logical volume"test_lv003" created
查看LV设备所在位置:
[iyunv@localhost dev]# lvdisplay --- Logical volume --- LV Path /dev/vg01/test_lv001 LV Name test_lv001 VG Name vg01 LV UUID 6Vw4p8-0EeJ-PcWC-lHMg-hRYp-X2xI-PCTJM2 LV Write Access read/write LV Creation host, timelocalhost.localdomain, 2013-03-22 13:02:22 +0800 LV Status available # open 0 LV Size 2.00 GiB Current LE 512 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
[iyunv@localhost /]# ls -l /dev/vg01/ 总用量 0 lrwxrwxrwx. 1 root root 7 3月 22 13:02test_lv001 -> ../dm-2 lrwxrwxrwx. 1 root root 7 3月 22 13:02test_lv002 -> ../dm-3 lrwxrwxrwx. 1 root root 7 3月 22 13:02test_lv003 -> ../dm-4
4.格式化LV[iyunv@localhost ~]# mkfs.ext3 /dev/vg01/test_lv001 mke2fs 1.41.12 (17-May-2010) 文件系统标签= 操作系统:Linux 块大小=4096 (log=2) 分块大小=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 131072 inodes, 524288 blocks 26214 blocks (5.00%) reserved for the super user 第一个数据块=0 Maximum filesystem blocks=536870912 16 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376,294912
正在写入inode表: 完成 Creating journal (16384 blocks): 完成 Writing superblocks and filesystem accounting information: 完成
This filesystem will be automatically checked every 36 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. 依次格式化test_lv002、test_lv003
5.创建挂载目录,并挂载LV[iyunv@localhost /]# mkdir test001 [iyunv@localhost /]# mkdir test002 [iyunv@localhost /]# mkdir test003 [iyunv@localhost /]# ls bin etc lost+found mnt proc selinux test001 tmp boot home media net root srv test002 usr dev lib misc opt sbin sys test003 var [iyunv@localhost /]# df 文件系统 1K-块 已用 可用 已用% 挂载点 /dev/mapper/VolGroup-lv_root 22230908 3594416 17507228 18% / tmpfs 514488 420 514068 1% /dev/shm /dev/sda1 495844 31565 438679 7% /boot [iyunv@localhost /]# mount /dev/vg01/test_lv001 /test001 [iyunv@localhost /]# mount /dev/vg01/test_lv002 /test002 [iyunv@localhost /]# mount /dev/vg01/test_lv003 /test003 [iyunv@localhost /]# df -h 文件系统 容量 已用 可用 已用%% 挂载点 /dev/mapper/VolGroup-lv_root 22G 3.5G 17G 18% / tmpfs 503M 420K 503M 1% /dev/shm /dev/sda1 485M 31M 429M 7% /boot /dev/mapper/vg01-test_lv001 2.0G 68M 1.9G 4% /test001 /dev/mapper/vg01-test_lv002 2.0G 68M 1.9G 4% /test002 /dev/mapper/vg01-test_lv003 3.0G 69M 2.8G 3% /test003
[iyunv@localhost test001]# vi /etc/fstab
在线扩容:vg中有剩余空间,可直接拓展,如果无剩余空间,需添加新的PV到vg01中。 此处将sdc作为一个PV后,拓展到vg01。 创建PV[iyunv@localhost test001]# pvcreate /dev/sdc Writing physical volume data todisk "/dev/sdc" Physical volume"/dev/sdc" successfully created 添加PV到vg01中: [iyunv@localhost test001]# vgextend vg01 /dev/sdc Volume group "vg01"successfully extended 查看vg01详细信息: [iyunv@localhost test001]# vgdisplay -v vg01 Using volume group(s) on commandline Finding volume group"vg01" --- Volume group --- VG Name vg01 System ID Format lvm2 Metadata Areas 4 Metadata Sequence No 5 VG Access read/write VG Status resizable MAX LV 0 Cur LV 3 Open LV 3 Max PV 0 Cur PV 4 Act PV 4 VG Size 31.98 GiB PE Size 4.00 MiB Total PE 8188 Alloc PE / Size 1792 / 7.00 GiB Free PE / Size 6396 / 24.98 GiB VG UUID HvmwcQ-yUmr-71HP-RSaS-kQLs-T1gg-KTlGzb
--- Logical volume --- LV Path /dev/vg01/test_lv001 LV Name test_lv001 VG Name vg01 LV UUID 6Vw4p8-0EeJ-PcWC-lHMg-hRYp-X2xI-PCTJM2 LV Write Access read/write LV Creation host, timelocalhost.localdomain, 2013-03-22 13:02:22 +0800 LV Status available # open 1 LV Size 2.00 GiB Current LE 512 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
--- Logical volume --- LV Path /dev/vg01/test_lv002 LV Name test_lv002 VG Name vg01 LV UUID a7Xqm1-FLMp-RW5u-xjTr-4q3D-tjuk-P8g776 LV Write Access read/write LV Creation host, timelocalhost.localdomain, 2013-03-22 13:02:36 +0800 LV Status available # open 1 LV Size 2.00 GiB Current LE 512 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3
--- Logical volume --- LV Path /dev/vg01/test_lv003 LV Name test_lv003 VG Name vg01 LV UUID Uh6tFl-dXzA-kSaf-IHAE-OXNA-bxNj-1FYZhZ LV Write Access read/write LV Creation host, timelocalhost.localdomain, 2013-03-22 13:02:48 +0800 LV Status available # open 1 LV Size 3.00 GiB Current LE 768 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:4
--- Physical volumes --- PV Name /dev/sdd PV UUID lTSpmW-BmZj-vuXj-Ouxx-v6H9-bV3k-f5xaZg PV Status allocatable Total PE / Free PE 2047 / 255
PV Name /dev/sde PV UUID y69gjf-x4oe-2hpt-iHR2-rt4Z-IpV4-AQvlhd PV Status allocatable Total PE / Free PE 2047 / 2047
PV Name /dev/sdf PV UUID shvndV-Xo73-4BcO-ogDE-bMFm-YS0Y-P339Lq PV Status allocatable Total PE / Free PE 2047 / 2047
PV Name /dev/sdc PV UUID PLdMOW-9lm3-9Lph-eJ3H-h3Rb-cd3q-x888gY PV Status allocatable Total PE / Free PE 2047 / 2047
给test_lv001增加2G空间[iyunv@localhost /]# lvresize -L +2G /dev/vg01/test_lv001 Extending logical volumetest_lv001 to 4.00 GiB Logical volume test_lv001successfully resized [iyunv@localhost /]# df -h 文件系统 容量 已用 可用 已用%% 挂载点 /dev/mapper/VolGroup-lv_root 22G 3.5G 17G 18% / tmpfs 503M 420K 503M 1% /dev/shm /dev/sda1 485M 31M 429M 7% /boot /dev/mapper/vg01-test_lv002 2.0G 68M 1.9G 4% /test002 /dev/mapper/vg01-test_lv003 3.0G 69M 2.8G 3% /test003 /dev/mapper/vg01-test_lv001 2.0G 68M 1.9G 4% /test001
使用resize2fs命令,令新增空间在线生效[iyunv@localhost /]# resize2fs /dev/vg01/test_lv001 resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vg01/test_lv001 is mounted on /test001; on-lineresizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/vg01/test_lv001 to 1048576 (4k)blocks. The filesystem on /dev/vg01/test_lv001 is now 1048576 blocks long.
[iyunv@localhost /]# df -h 文件系统 容量 已用 可用 已用%% 挂载点 /dev/mapper/VolGroup-lv_root 22G 3.5G 17G 18% / tmpfs 503M 420K 503M 1% /dev/shm /dev/sda1 485M 31M 429M 7% /boot /dev/mapper/vg01-test_lv002 2.0G 68M 1.9G 4% /test002 /dev/mapper/vg01-test_lv003 3.0G 69M 2.8G 3% /test003 /dev/mapper/vg01-test_lv001 4.0G 69M 3.7G 2% /test001 [iyunv@localhost /]# lvdisplay -v /dev/vg01/test_lv001 Using logical volume(s) oncommand line --- Logical volume --- LV Path /dev/vg01/test_lv001 LV Name test_lv001 VG Name vg01 LV UUID 6Vw4p8-0EeJ-PcWC-lHMg-hRYp-X2xI-PCTJM2 LV Write Access read/write LV Creation host, timelocalhost.localdomain, 2013-03-22 13:02:22 +0800 LV Status available # open 1 LV Size 4.00 GiB Current LE 1024 Segments 3 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
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