记一次阿里云 ECS 服务器数据盘无损扩容

Categories 学习笔记

原数据盘 20G 扩容至 25G，购买后通过 SSH 登陆实例进行操作；

操作步骤完全参考阿里云帮助即可：https://help.aliyun.com/document_detail/25452.html

[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   15G   23G  39% /
tmpfs           939M     0  939M   0% /dev/shm
/dev/vdb1        20G   13G  6.7G  65% /home/wwwroot
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# umount /dev/vdb1
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   15G   23G  39% /
tmpfs           939M     0  939M   0% /dev/shm
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# fdisk -l

Disk /dev/vda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 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: 0x00020f03

   Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           1        5222    41940992   83  Linux

Disk /dev/vdb: 26.8 GB, 26843545600 bytes
16 heads, 63 sectors/track, 52012 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x78d92770

   Device Boot      Start         End      Blocks   Id  System
/dev/vdb1               1       41610    20971408+  83  Linux
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# fdisk /dev/vdb

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): d
Selected partition 1

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-52012, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-52012, default 52012): 
Using default value 52012

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# e2fsck -f /dev/vdb1
e2fsck 1.41.12 (17-May-2010)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/vdb1: 95741/1310720 files (0.8% non-contiguous), 3228283/5242852 blocks
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# resize2fs /dev/vdb1
resize2fs 1.41.12 (17-May-2010)
Resizing the filesystem on /dev/vdb1 to 6553504 (4k) blocks.
The filesystem on /dev/vdb1 is now 6553504 blocks long.

[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# mount /dev/vdb1 /home/wwwroot
[root@iZ2ze4knyxhkgpnbo7brn7Z ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   15G   23G  39% /
tmpfs           939M     0  939M   0% /dev/shm
/dev/vdb1        25G   13G   12G  52% /home/wwwroot

值得注意的点是 fdisk 命令操作时， 是使用 fdisk /dev/vdb 而不是 fdisk /dev/vdb1，这里没仔细看坑了我好长时间，一直扩容失败；

扩容成功。

rsync 带不带尾部斜杠的不同作用

Categories 学习笔记

rsync 是很好用的同步软件，使用增量方式同步。不过使用 rsync 时有没有尾部斜杠效果是不同的

使用方法  rsync  src   dest

总结一下规律：

src 目录没有带斜杠：则在  dest 下面有 src 文件夹

src 目录没有带斜杠：则在 dest 目录下面只有 src 目录下面的文件

换言之：如果忽略了源文件斜杠  rsync 将创建源文件目录的最后一个文件夹名字并且包含它的所有文件，如果添加了斜杠 rsync 将跳过那个目录直接复制里面的内容

dest 带不带斜杠没有任何影响。 Continue reading rsync 带不带尾部斜杠的不同作用

执行 umount 的时提示: device is busy 的处理方法

Categories 学习笔记

错误

[root@iZ25xpwwmfnZ ~]# umount /dev/vdb5
umount: /data/wwwroot/www.1001alading.com/Uploads: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

查看

[root@iZ25xpwwmfnZ ~]# fuser -m -v /data/wwwroot/www.1001alading.com/Uploads
                     USER        PID ACCESS COMMAND
/data/wwwroot/www.1001alading.com/Uploads:
                     www        2925 f.... nginx
                     www        2927 F.... nginx
                     root      18365 f.... AliYunDun
                     root      28557 f.... pick.sh

杀进程

[root@iZ25xpwwmfnZ ~]# fuser -m -v -i -k /data/wwwroot/www.1001alading.com/Uploads
                     USER        PID ACCESS COMMAND
/data/wwwroot/www.1001alading.com/Uploads:
                     www        2925 f.... nginx
                     www        2927 F.... nginx
                     www        2928 F.... nginx
                     root      18365 f.... AliYunDun
                     root      28557 f.... pick.sh
Kill process 2925 ? (y/N) y
Kill process 2927 ? (y/N) y
Kill process 2928 ? (y/N) y
Kill process 18365 ? (y/N) y
Kill process 28557 ? (y/N) y

再次卸载

资料转移记录

Categories 学习笔记 
mkdir /home/Uploads
mkdir /home/temp
mv /home/wwwroot/ald.1001ald/Uploads/* /home/Uploads
umount /dev/vdb1
mount /dev/vdb1 /home/temp
mv -rf /home/Uploads /home/wwwroot/ald.1001ald
mv /home/wwwroot/ald.1001ald/ /home/temp
umount /dev/vdb1
mount /dev/vdb1 /home/wwwroot
vim /etc/rc.d/rc.local
mount /dev/vdb1 /home/wwwroot