擴展Linux虛擬機硬盤、分區(qū)一例
在給客戶部署Linux虛擬機時，我一般都會單獨做出一個分區(qū)來存儲客戶的所有數(shù)據(jù)，并取名為data。/data分區(qū)的默認(rèn)大小為35G，隨著時間的發(fā)展，有的客戶提出擴大/data分區(qū)的需求。下面是我在ESX4.0上的實施步驟：
注：在生產(chǎn)環(huán)境中一定要先做好備份再做操作！
1）關(guān)掉Linux虛擬機，運行vmkfstools命令擴展vmdk文件。原大小為50G，現(xiàn)在擴展為65G。
vmkfstools -X 65G CentOS53.vmdk
2）開啟Linux虛擬機，可以通過以下命令可以查看新增的可用空間。
[root@CentOS53 ~]# parted
GNU Parted 1.8.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print free
Model: VMware Virtual disk (scsi)
Disk /dev/sda: 69.8GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End SizeType File system Flags
1 32.3kB 107MB 107MB primary ext3 boot
2 107MB 4401MB 4294MB primary ext3
3 4401MB 6547MB 2147MB primary linux-swap
4 6547MB 53.7GB 47.1GB extended
5 6547MB 8694MB 2147MB logical ext3
6 8694MB 10.8GB 2147MB logical ext3
7 10.8GB 11.9GB 1077MB logical ext3
8 11.9GB 13.0GB 1077MB logical ext3
9 13.0GB 53.7GB 40.7GB logical ext3
53.7GB 69.8GB 16.1GBFree Space
3）運行disk /dev/sda后輸入P查看分區(qū)結(jié)果如下，并記錄下來(/dev/sda9加載在/data分區(qū)上)?？梢娍偣灿?485個cylinder，但最后一個分區(qū)只是到6527就結(jié)束了。這說明后面還有硬盤空間。
Disk /dev/sda: 69.7 GB, 69793218560 bytes
255 heads, 63 sectors/track, 8485 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 535 4192965 83 Linux
/dev/sda3 536 796 2096482+ 82 Linux swap / Solaris
/dev/sda4 797652746034257+ 5 Extended
/dev/sda5 7971057 2096451 83 Linux
/dev/sda610581318 2096451 83 Linux
/dev/sda713191449 1052226 83 Linux
/dev/sda814501580 1052226 83 Linux
/dev/sda91581652739736746 83 Linux
4）輸入d刪除擴展分區(qū)/dev/sda4，這樣所有的邏輯分區(qū)就從分區(qū)表中消失了（不要害怕，呵呵）。
5）輸入n創(chuàng)建新的擴展分區(qū)，并創(chuàng)建原來（/dev/sda9除外）所有的邏輯分區(qū)并保持原來的起始、結(jié)束cylinder地址不變。/dev/sda9的起始地址不變，結(jié)束地址改為8485。新的分區(qū)表如下。確認(rèn)無誤后輸入w已保存生效。
Command (m for help): p
Disk /dev/sda: 69.7 GB, 69793218560 bytes
255 heads, 63 sectors/track, 8485 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 535 4192965 83 Linux
/dev/sda3 536 796 2096482+ 82 Linux swap / Solaris
/dev/sda4 797848561761892+ 5 Extended
/dev/sda5 7971057 2096451 83 Linux
/dev/sda610581318 2096451 83 Linux
/dev/sda713191449 1052226 83 Linux
/dev/sda814501580 1052226 83 Linux
/dev/sda91581848555464381 83 Linux
6）查看改動后的分區(qū)大小。到目前為止，/data分區(qū)大小仍未改變。
[root@CentOS53 ~]# df -h
FilesystemSize Used Avail Use% Mounted on
/dev/sda8 996M 235M 710M 25% /
/dev/sda9 37G 177M 35G 1% /data
/dev/sda7 996M 34M 911M 4% /home
/dev/sda6 2.0G 76M 1.8G 5% /var
/dev/sda2 3.9G 1.4G 2.4G 38% /usr
/dev/sda5 2.0G 36M 1.9G 2% /usr/local
/dev/sda1 99M 17M 78M 18% /boot
tmpfs 506M 0 506M 0% /dev/shm
7）運行resize2fs /dev/sda9已擴展/data分區(qū)。（在2.6.X內(nèi)核里無需先umount）
[root@CentOS53 ~]# resize2fs /dev/sda9
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/sda9 is mounted on /apps; on-line resizing required
Performing an on-line resize of /dev/sda9 to 13866095 (4k) blocks.
The filesystem on /dev/sda9 is now 13866095 blocks long.
8）再次查看分區(qū)大小。成功，哦耶！
[root@CentOS53 ~]# df -h
FilesystemSize Used Avail Use% Mounted on
/dev/sda8 996M 235M 710M 25% /
/dev/sda9 52G 180M 49G 1% /data
/dev/sda7 996M 34M 911M 4% /home
/dev/sda6 2.0G 76M 1.8G 5% /var
/dev/sda2 3.9G 1.4G 2.4G 38% /usr
/dev/sda5 2.0G 36M 1.9G 2% /usr/local
/dev/sda1 99M 17M 78M 18% /boot
tmpfs 506M 0 506M 0% /dev/shm
【編輯推薦】
