服务器使用的是阿里云的服务器,由于原来阿里云还不支持磁盘直接扩容,所以当时做了lvm卷组管理,以便后期磁盘不足时可以灵活的扩展,以下是我目前的环境: [Qoocoadmin@iZ25noqnry1Z ~]$ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 20G 2.0G 17G 11% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/mapper/VolGroup-data 936G 820G 69G 93% /data 如上,磁盘已快不足了,在阿里云的控制台将磁盘扩展到1500GB,然后在控制台重启服务器(在系统中重启无效),重启前先将 /etc/fstab 中的磁盘挂载信息注释掉。 [root@iZ25noqnry1Z ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Thu Jul 3 10:43:14 2014 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=2a348234-4a73-491c-98e9-47900d88697b / ext4 defaults,barrier=0 1 1 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 none /proc/xen xenfs defaults 0 0 #/dev/VolGroup/data /data ext4 defaults 0 0 重启后ssh登录系统,如下: [root@iZ25noqnry1Z ~]# fdisk -l Disk /dev/xvda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00060953 Device Boot Start End Blocks Id System /dev/xvda1 * 1 2611 20970496 83 Linux Disk /dev/xvdb: 1610.6 GB, 1610612736000 bytes 255 heads, 63 sectors/track, 195812 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3ad639b Device Boot Start End Blocks Id System /dev/xvdb1 1 130541 1048570551 8e Linux LVM Disk /dev/mapper/VolGroup-data: 1020.1 GB, 1020054732800 bytes 255 heads, 63 sectors/track, 124014 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 如上,磁盘扩容已生效。 接下来进行lvm扩容。 1. 将扩展的磁盘进行分区 [root@iZ25noqnry1Z ~]# fdisk /dev/xvdb WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p Disk /dev/xvdb: 1610.6 GB, 1610612736000 bytes 255 heads, 63 sectors/track, 195812 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3ad639b Device Boot Start End Blocks Id System /dev/xvdb1 1 130541 1048570551 8e Linux LVM Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 2 First cylinder (130542-195812, default 130542): Using default value 130542 Last cylinder, +cylinders or +size{K,M,G} (130542-195812, default 195812): Using default value 195812 Command (m for help): p Disk /dev/xvdb: 1610.6 GB, 1610612736000 bytes 255 heads, 63 sectors/track, 195812 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3ad639b Device Boot Start End Blocks Id System /dev/xvdb1 1 130541 1048570551 8e Linux LVM /dev/xvdb2 130542 195812 524289307+ 83 Linux Command (m for help): t Partition number (1-4): 2 Hex code (type L to list codes): 8e Changed system type of partition 2 to 8e (Linux LVM) Command (m for help): p Disk /dev/xvdb: 1610.6 GB, 1610612736000 bytes 255 heads, 63 sectors/track, 195812 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3ad639b Device Boot Start End Blocks Id System /dev/xvdb1 1 130541 1048570551 8e Linux LVM /dev/xvdb2 130542 195812 524289307+ 8e Linux LVM Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: 设备或资源忙. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks. 出现上面信息,root重启一下服务器。 重启后查看磁盘信息,如下: [root@iZ25noqnry1Z ~]# fdisk -l Disk /dev/xvda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00060953 Device Boot Start End Blocks Id System /dev/xvda1 * 1 2611 20970496 83 Linux Disk /dev/xvdb: 1610.6 GB, 1610612736000 bytes 255 heads, 63 sectors/track, 195812 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe3ad639b Device Boot Start End Blocks Id System /dev/xvdb1 1 130541 1048570551 8e Linux LVM /dev/xvdb2 130542 195812 524289307+ 8e Linux LVM Disk /dev/mapper/VolGroup-data: 1020.1 GB, 1020054732800 bytes 255 heads, 63 sectors/track, 124014 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 2. 创建PV物理卷 [root@iZ25noqnry1Z ~]# pvcreate /dev/xvdb2 Physical volume "/dev/xvdb2" successfully created 3. 将pv加入现有的vg组中 [root@iZ25noqnry1Z ~]# vgextend VolGroup /dev/xvdb2 Volume group "VolGroup" successfully extended 4. 扩展现有lv卷 [root@iZ25noqnry1Z ~]# lvextend -L +327200 /dev/VolGroup/data Extending logical volume data to 1.24 TiB Logical volume data successfully resized 5. 刷新容量 [root@iZ25noqnry1Z ~]# lvextend -L +327200 /dev/VolGroup/data Extending logical volume data to 1.24 TiB Logical volume data successfully resized [root@iZ25noqnry1Z ~]# resize2fs /dev/VolGroup/data resize2fs 1.41.12 (17-May-2010) 请先运行 'e2fsck -f /dev/VolGroup/data'. 出现以上,那就执行一下吧。 [root@iZ25noqnry1Z ~]# e2fsck -f /dev/VolGroup/data e2fsck 1.41.12 (17-May-2010) 第一步: 检查inode,块,和大小 第二步: 检查目录结构 第3步: 检查目录连接性 /lost+found未找到.创建<y>? 是 Pass 4: Checking reference counts 第5步: 检查簇概要信息 /dev/VolGroup/data: ***** 文件系统已修改 ***** /dev/VolGroup/data: 173081/62259200 files (1.8% non-contiguous), 218725658/249036800 blocks [root@iZ25noqnry1Z ~]# 执行检查完成,再次执行刷新: [root@iZ25noqnry1Z ~]# resize2fs /dev/VolGroup/data resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/VolGroup/data to 332800000 (4k) blocks. The filesystem on /dev/VolGroup/data is now 332800000 blocks long. 6. 挂载磁盘 [root@iZ25noqnry1Z data]# df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 20G 1.9G 17G 11% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/mapper/VolGroup-data 1.3T 820G 367G 70% /data 7. 将 /etc/fstab 文件中注释的磁盘挂载信息打开,可以重启一下服务器看是否依然正常挂载,成功挂载就OK了。