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README.md
Nova Flavor plugin for OpenStack Heat
This plugin enables using Nova Flavors as resources in a Heat template.
Note that the current implementation of the Nova Flavor resource does not allow specifying the name and flavorid properties for the resource. This is done to avoid potential naming collision upon flavor creation as all flavor have a global scope.
1. Install the Nova Flavor plugin in Heat
NOTE: Heat scans several directories to find plugins. The list of directories is specified in the configuration file "heat.conf" with the "plugin_dirs" directive.
2. Restart heat
Only the process "heat-engine" needs to be restarted to load the new installed plugin.
Template Format
Here's an example nova flavor resource:
heat_template_version: 2013-05-23
description: Heat Flavor creation example
resources:
test_flavor:
type: OS::Nova::Flavor
properties:
ram: 1024
vcpus: 1
disk: 20
swap: 2
Issues with the Nova Flavor plugin
By default only the admin tenant can manage flavors because of the default
policy in Nova: "compute_extension:flavormanage": "rule:admin_api"
To let the possibility to all tenants to create flavors, the rule must be
replaced with the following: "compute_extension:flavormanage": ""
The following error occurs if the policy has not been correctly set: ERROR: Policy doesn't allow compute_extension:flavormanage to be performed.
Currently all nova flavors have a global scope, which leads to several issues:
- Per-stack flavor creation will pollute the global flavor list.
- If two stacks create a flavor with the same name collision will occur, which will lead to the following error:
ERROR (Conflict): Flavor with name dupflavor already exists.