/var 在 1and1 的新 Ubuntu 专用服务器中使用了 3.99GB 的 91.4%

Question

昨天我从1and1购买了一个专用服务器包。我安装了 Rails、Mongo 和 nginx。今天，当我登录时，它显示以下消息：

欢迎使用 Ubuntu 12.04 LTS (GNU/Linux 3.2.0-24-generic x86_64)

• 文档：https : //help.ubuntu.com/

  截至 2012 年 5 月 23 日星期三 21:45:00 EDT 的系统信息

  系统负载：0.82 进程：114 /home 的使用：3.99GB 的 6.1% 用户登录：1 内存使用：4%
  eth0 的 IP 地址：xx.xx.xxx.xxx 交换使用：0%

  => /var 使用了 3.99GB 的 91.4%

  在https://landscape.canonical.com/ 上绘制此数据并管理此系统

21个包可以更新。6 个更新是安全更新。

我对 linux 或命令行不太熟练，但是对于一个目录来说 4GB 是不是花生？

如果我做 du -a /var | sort -n -r | head -n 10

3565292 /var
3299164 /var/lib
3145752 /var/lib/mongodb
3145744 /var/lib/mongodb/journal
1048580 /var/lib/mongodb/journal/prealloc.2
1048580 /var/lib/mongodb/journal/prealloc.1
1048580 /var/lib/mongodb/journal/j._0
237272  /var/cache
147260  /var/cache/apt
114844  /var/lib/apt

如果我这样做 df -h

Filesystem             Size  Used Avail Use% Mounted on
/dev/sda1              3.7G  736M  3.0G  20% /
udev                   3.9G  4.0K  3.9G   1% /dev
tmpfs                  1.6G  260K  1.6G   1% /run
none                   5.0M     0  5.0M   0% /run/lock
none                   3.9G     0  3.9G   0% /run/shm
/dev/mapper/vg00-usr   4.0G 1007M  2.9G  26% /usr
/dev/mapper/vg00-var   4.0G  3.7G  146M  97% /var
/dev/mapper/vg00-home  4.0G  251M  3.6G   7% /home

如果我做 fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204402688 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953524224 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6c80de21

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63     7823654     3911796   83  Linux
/dev/sda2         7823655    11743514     1959930   82  Linux swap / Solaris
/dev/sda3        11743515  1953520064   970888275   8e  Linux LVM

Disk /dev/mapper/vg00-usr: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg00-usr doesn't contain a valid partition table

Disk /dev/mapper/vg00-var: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg00-var doesn't contain a valid partition table

Disk /dev/mapper/vg00-home: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders, total 8388608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg00-home doesn't contain a valid partition table

和 mount

/dev/sda1 on / type ext3 (rw)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/mapper/vg00-usr on /usr type ext4 (rw,errors=remount-ro)
/dev/mapper/vg00-var on /var type ext4 (rw,errors=remount-ro)
/dev/mapper/vg00-home on /home type ext4 (rw,errors=remount-ro)

vgdisplay：

  --- Volume group ---
  VG Name               vg00
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               925.91 GiB
  PE Size               4.00 MiB
  Total PE              237033
  Alloc PE / Size       3072 / 12.00 GiB
  Free  PE / Size       233961 / 913.91 GiB
  VG UUID               eI2V0B-oVzj-HiIh-enIh-FnrO-NJKi-KpZb0i

我的问题：有没有办法克服这个限制？

Answer 1

原来我的系统支持在线扩展逻辑卷。以下是解决方法：

# df -h

将列出分区和逻辑卷：

Filesystem             Size  Used Avail Use% Mounted on
/dev/sda1              3.7G  736M  3.0G  20% /
udev                   3.9G  4.0K  3.9G   1% /dev
tmpfs                  1.6G  260K  1.6G   1% /run
none                   5.0M     0  5.0M   0% /run/lock
none                   3.9G     0  3.9G   0% /run/shm
/dev/mapper/vg00-usr   4.0G 1007M  2.9G  26% /usr
/dev/mapper/vg00-var   4.0G  3.7G  145M  97% /var
/dev/mapper/vg00-home  4.0G  251M  3.6G   7% /home

选择你想要扩展的分区并通过 lvextend 运行它

# lvextend -L +46G /dev/mapper/vg00-var

+46G您要添加的数字在哪里，在我的情况下是 46+4 = 50。

之后，您需要使用以下命令增加文件系统以匹配逻辑卷的文件系统：

# resize2fs /dev/mapper/vg00-var

你会有一个更大的分区：

resize2fs 1.42 (29-Nov-2011)
Filesystem at /dev/mapper/vg00-var is mounted on /var; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 4
Performing an on-line resize of /dev/mapper/vg00-var to 13107200 (4k) blocks.
The filesystem on /dev/mapper/vg00-var is now 13107200 blocks long.

新的df -h输出：

Filesystem             Size  Used Avail Use% Mounted on
/dev/sda1              3.7G  737M  3.0G  20% /
udev                   3.9G  4.0K  3.9G   1% /dev
tmpfs                  1.6G  260K  1.6G   1% /run
none                   5.0M     0  5.0M   0% /run/lock
none                   3.9G     0  3.9G   0% /run/shm
/dev/mapper/vg00-usr   4.0G 1008M  2.9G  26% /usr
/dev/mapper/vg00-var    49G  3.7G   43G   8% /var
/dev/mapper/vg00-home  4.0G  251M  3.6G   7% /home