Manage flavors

In OpenStack, a flavor defines the compute, memory, and storage capacity of a virtual server, also known as an instance. As an administrative user, you can create and delete flavors and update their metadata.

As of Newton, there are no default flavors. The following table lists the default flavors for Mitaka and earlier.

Flavor

VCPUs

Disk (in GB)

RAM (in MB)

m1.tiny

1

1

512

m1.small

1

20

2048

m1.medium

2

40

4096

m1.large

4

80

8192

m1.xlarge

8

160

16384

Create flavors

  1. Log in to the Dashboard and select the admin project from the drop-down list.

  2. In the Admin tab, open the Compute tab and click the Flavors category.

  3. Click Create Flavor.

  4. In the Create Flavor window, enter or select the parameters for the flavor in the Flavor Information tab.

    ../_images/create_flavor.png

    Dashboard — Create Flavor

    Name

    Enter the flavor name.

    ID

    Unique ID (integer or UUID) for the new flavor. If specifying ‘auto’, a UUID will be automatically generated.

    VCPUs

    Enter the number of virtual CPUs to use.

    RAM (MB)

    Enter the amount of RAM to use, in megabytes.

    Root Disk (GB)

    Enter the amount of disk space in gigabytes to use for the root (/) partition.

    Ephemeral Disk (GB)

    Enter the 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 lifecycle 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 Disk (MB)

    Enter the amount of swap space (in megabytes) to use. If unspecified, the default is 0.

    RX/TX Factor

    Optional property allows servers with a different bandwidth to be created with the RX/TX Factor. The default value is 1. That is, the new bandwidth is the same as that of the attached network.

  5. In the Flavor Access tab, you can control access to the flavor by moving projects from the All Projects column to the Selected Projects column.

    Only projects in the Selected Projects column can use the flavor. If there are no projects in the right column, all projects can use the flavor.

  6. Click Create Flavor.

Update Metadata

  1. Log in to the Dashboard and select the admin project from the drop-down list.

  2. In the Admin tab, open the Compute tab and click the Flavors category.

  3. Select the flavor that you want to update. In the drop-down list, click Update Metadata or click No or Yes in the Metadata column.

  4. In the Update Flavor Metadata window, you can customize some metadata keys, then add it to this flavor and set them values.

  5. Click Save.

    Optional metadata keys

    CPU limits

    quota:cpu_shares

    quota:cpu_period

    quota:cpu_limit

    quota:cpu_reservation

    quota:cpu_quota

    Disk tuning

    quota:disk_read_bytes_sec

    quota:disk_read_iops_sec

    quota:disk_write_bytes_sec

    quota:disk_write_iops_sec

    quota:disk_total_bytes_sec

    quota:disk_total_iops_sec

    Bandwidth I/O

    quota:vif_inbound_average

    quota:vif_inbound_burst

    quota:vif_inbound_peak

    quota:vif_outbound_average

    quota:vif_outbound_burst

    quota:vif_outbound_peak

    Watchdog behavior

    hw:watchdog_action

    Random-number generator

    hw_rng:allowed

    hw_rng:rate_bytes

    hw_rng:rate_period

    For information about supporting metadata keys, see the the Compute service documentation.

Delete flavors

  1. Log in to the Dashboard and select the admin project from the drop-down list.

  2. In the Admin tab, open the Compute tab and click the Flavors category.

  3. Select the flavors that you want to delete.

  4. Click Delete Flavors.

  5. In the Confirm Delete Flavors window, click Delete Flavors to confirm the deletion. You cannot undo this action.