Flavor

Templates - named flavors - are predefined for virtual machines.

You can find flavors list by using openstack flavor list command.

$ openstack flavor list 
+--------------------------------------+-------------------+-------+------+-----------+-------+-----------+
| ID                                   | Name              |   RAM | Disk | Ephemeral | VCPUs | Is Public |
+--------------------------------------+-------------------+-------+------+-----------+-------+-----------+
| 15b0660a-c92e-45ef-a55f-8fe3e38ad88b | m1.xxlarge        | 32768 |   80 |         0 |    16 | True      |
| 27604782-3a8e-4400-ac97-463420af0046 | solidfire.m1.tiny |   512 |    1 |         0 |     1 | True      |
| 2f7317be-88b7-4dfc-ba62-83d7536864a5 | m1.tiny           |   512 |    1 |         0 |     1 | True      |
| 329143cc-ec6f-4df1-a937-a47266387edd | m1.xxxlarge       | 65536 |   80 |         0 |    20 | True      |
| 58ccf266-4ede-4836-b5a6-e765d2f9f832 | m1.medium         |  4096 |   40 |         0 |     2 | True      |
| c15427d1-6e24-4549-8ed1-167e35c2b0fa | m1.large          |  8192 |   80 |         0 |     4 | True      |
| ee2a7255-936e-4088-99da-f494d8539787 | m1.small          |  2048 |   20 |         0 |     1 | True      |
| ef98c96f-1344-4ab4-845b-d7d04b7bc0e3 | m1.xlarge         | 16384 |   80 |         0 |     8 | True      |
+--------------------------------------+-------------------+-------+------+-----------+-------+-----------+

These flavors provide the necessary material resources such as

  • disks size
  • memory
  • core number

which will define the computing capacity of the instance to create..

Be careful, don’t choose a flavor that exceeds the remaining available resources.

For example :
On this image, the icons indicate that the template requires a too large resource compared to the remaining available resources.
Then, the instance cannot be built with these templates.

Nova_Flavor