Manage flavors
In OpenStack, flavors define the compute, memory, and
storage capacity of nova computing instances. To put it
simply, a flavor is an available hardware configuration for a
server. It defines the size
of a virtual server
that can be launched.
A flavor consists of the following parameters:
Flavor ID
Automatically generated by OpenStack. For
private flavors, a value from 1 to 255.
Name
Name for the new flavor.
VCPUs
Number of virtual CPUs to use.
Memory MB
Amount of RAM to use (in megabytes).
Root Disk GB
Amount of disk space (in gigabytes) to use for
the root (/) partition.
Ephemeral Disk GB
Amount of disk space (in gigabytes) to use for
the ephemeral partition. If unspecified, the value
is 0 by default.
Ephemeral disks offer machine local disk storage
linked to the life cycle of a VM instance. When a
VM is terminated, all data on the ephemeral disk
is lost. Ephemeral disks are not included in any
snapshots.
Swap
Amount of swap space (in megabytes) to use. If
unspecified, the value is 0 by default.
The default flavors are:
m1.tiny (1 VCPU/0 GB Disk/512 MB RAM)
m1.smaller (1 VCPU/0 GB Disk/1024 MB RAM)
m1.small (1 VCPU/10 GB Disk/2048 MB RAM)
m1.medium (2 VCPU/10 GB Disk/3072 MB RAM)
m1.large (4 VCPU/10 GB Disk/8192 MB RAM)
m1.xlarge (8 VCPU/10 GB Disk/8192 MB RAM)
You can create and manage flavors with the nova
flavor-* commands provided by the
python-novaclient package.
Create a flavor
List flavors to show the ID and name, the amount
of memory, the amount of disk space for the root
partition and for the ephemeral partition, the
swap, and the number of virtual CPUs for each
flavor.
$ nova flavor-list
To create a flavor, specify a name, ID, RAM
size, disk size, and the number of VCPUs for the
flavor, as follows:
$ nova flavor-create FLAVOR_NAME FLAVOR_ID RAM_IN_MB ROOT_DISK_IN_GB NUMBER_OF_VCPUS
The flavor ID is a number from 1 to 255 and
cannot contain special characters or
spaces.
For a list of optional parameters, run this
command:
$ nova help flavor-create
After you create a flavor, assign it to a
project by specifying the flavor name or ID and
the tenant ID:
$ nova flavor-access-add FLAVOR TENANT_ID
Delete a flavor
Delete a specified flavor, as follows:
$ nova flavor-delete FLAVOR_ID