作用

因为 openstack 命令行下, 没有办法直接获取资源使用情况
通过 sql 语句获得 tenant(project) 当前的资源使用情况
常见资源分别有 core, memory, disk, volume 这几种

sql

计算 cpu 与内存使用方法

查询当前 tenants 方法

mysql> select name from keystone.project;
+----------------+
| name           |
+----------------+
| admin          |
| DEV            |
| DMZ1           |
| DMZ2           |
| DMZ3           |
| DMZ4           |
| DMZ5           |
| DMZ6           |
| MGMT           |
| MOBILE         |
| OPS            |
| QA             |
| QATOOL         |
| services       |
| unlimit_tenant |
+----------------+
15 rows in set (0.00 sec)

直接通过 sql 语法调用, 连接 openstack 数据库 (mariadb)

mysql> select b.name instances,  count(a.vcpus) instances, sum(a.vcpus) cpus, sum( a.memory_mb ) memory_MB 
from nova.instances a, keystone.project b 
where a.deleted=0 
  and a.project_id = b.id 
  and  b.name in ('DEV', 'MOBILE','OPS') 
  and a.vm_state in ( 'active', 'building', 'stopped') 
group by project_id;
+-----------+-----------+------+-----------+
| instances | instances | cpus | memory_MB |
+-----------+-----------+------+-----------+
| DEV       |      2003 | 8890 |  11540480 |
| MOBILE    |       470 | 2830 |   4521984 |
| OPS       |       231 | 1037 |   1955840 |
+-----------+-----------+------+-----------+
3 rows in set (0.08 sec)

…….. (待续)