脚本的运行的前提，需要打开libvirt的监听

centos修改/etc/init.d/libvirtd

  LIBVIRTD_ARGS=-l

ubuntu下如下设置：
    openstack的官网文档中有介绍：
    /etc/libvirt/libvirt.conf:

    before  : #listen_tls = 0
    after : listen_tls = 0

    before : #listen_tcp = 1
    afterfter : listen_tcp = 1

    add: auth_tcp = "none"


    listen_addr = "localhost"  #这个是我们加的，仅仅监听本机

    Modify /etc/init/libvirt-bin.conf

    before : exec /usr/sbin/libvirtd  -d
    after : exec /usr/sbin/libvirtd -d -l

      Modify /etc/default/libvirt-bin

    before :libvirtd_opts=" -d"
    after :libvirtibvirtd_opts=" -d -l"

then, restart libvirt. Make sure libvirt is restarted.

# stop libvirt-bin && start libvirt-bin
# ps -ef | grep libvirt
root 1145 1 0 Nov27 ? 00:00:03 /usr/sbin/libvirtd -d -l




数据库的表结构：


desc instance;
+-------------+-----------+------+-----+---------+----------------+
| Field       | Type      | Null | Key | Default | Extra          |
+-------------+-----------+------+-----+---------+----------------+
| id          | int(11)   | NO   | PRI | NULL    | auto_increment |
| instance_id | int(7)    | YES  |     | NULL    |                |
| timestamp   | char(15)  | YES  |     | NULL    |                |
| cpu         | char(5)   | YES  |     | NULL    |                |
| mem         | char(5)   | YES  |     | NULL    |                |
| disk        | char(100) | YES  |     | NULL    |                |
| net         | char(100) | YES  |     | NULL    |                |
+-------------+-----------+------+-----+---------+----------------+
7 rows in set (0.00 sec)


脚本输出的对应关系：

('264','1329187275.52','0.249','10.34',' vda-0.206-0.0-0.0-37580963840::vdb-0.004-0.0-0.0-85899345920::',' vnet12-468-0-3288953-0::vnet13-0-0-36090-0::')
('instance_id','timestamp','cpu_usage','memory_usage','disk_name-disk_usage-read_speed-write_speed-disk_size::','netcard_name-total_upload-upload_speed-total_download-download_speed')

unit of disk:Kb/s
ubit of net :Kb/s

'''