阿里云初体验

其实云计算的学习和研究也有一段时间了，虽然是非正式的。使用云服务器的话，机会其实不多。九月的时候曾经在AWS的Win2003上工作了一小段时间，感觉是非常不稳定，老是连不上。

今天看到园子里提供代金券，就领取了。想着试用一个月，可最低配置的价格需要89，刚好差一块钱，可恶啊。

看下广告，答题晒weibo可以再领代金券，那就瞎答试试，结果得了70分，这下够了，买了130的配置。

配置：1核处理器 1G 1Mbps 容量60GB CentOS 6.2 64位

开始不知道怎么登陆，查了一下才知道用 root。修改密码，重启，登陆，OK。

[root@AY1210300338513bb3855 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/xvda1             20G  529M   20G   3% /
tmpfs                 498M     0  498M   0% /dev/shm

怎么只有20G，难道坑爹。用 fdisk 看看，数据盘还没格式化和挂载。

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: 0x00000000

    Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *           1        2550    20480000   83  Linux
/dev/xvda2            2550        2611      490496   82  Linux swap / Solaris

Disk /dev/xvdb: 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: 0x00000000

Disk /dev/xvdb doesn't contain a valid partition table

操作还是熟悉的吧，用 cfdisk 分区，fdisk太难用了，然后格式化。

[root@AY1210300338513bb3855 mnt]# mkfs.ext4 /dev/xvd
xvda   xvda1  xvda2  xvdb   xvdb1  
[root@AY1210300338513bb3855 mnt]# mkfs.ext4 /dev/xvdb1 
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2621440 inodes, 10485752 blocks
524287 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
320 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000, 7962624

Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 26 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

[root@AY1210300338513bb3855 /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/xvda1             20G  529M   20G   3% /
tmpfs                 498M     0  498M   0% /dev/shm
/dev/xvdb1             40G  176M   38G   1% /mnt

这下容量看起来正常了。

尝试安装编译工具，可惜失败了，无法满足依赖，出问题的包是 kernel-header。后来才知道需要修改yum.conf，注释掉kernel这行。

[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
#exclude=kernel*

重新安装试试看，没有问题。

yum -y install gcc gcc-c++

Installed:
  gcc.x86_64 0:4.4.6-4.el6                              gcc-c++.x86_64 0:4.4.6-4

Dependency Installed:
  cloog-ppl.x86_64 0:0.15.7-1.2.el6                         cpp.x86_64 0:4.4.6-4
  glibc-devel.x86_64 0:2.12-1.80.el6_3.5                    glibc-headers.x86_64
  kernel-headers.x86_64 0:2.6.32-279.11.1.el6               libgomp.x86_64 0:4.4
  libstdc++-devel.x86_64 0:4.4.6-4.el6                      mpfr.x86_64 0:2.4.1-
  ppl.x86_64 0:0.10.2-11.el6

Dependency Updated:
  glibc.x86_64 0:2.12-1.80.el6_3.5     glibc-common.x86_64 0:2.12-1.80.el6_3.5
  libstdc++.x86_64 0:4.4.6-4.el6

Complete!