ca279c68a5
The purpose of the RT._normalize_inventory_from_cn_obj method is to set allocation_ratio and reserved amounts on standard resource class inventory records that get sent to placement if the virt driver did not specifically set a ratio or reserved value (which none but the ironic driver do). If the allocation_ratio or reserved amount is in the inventory data dict from the virt driver, then the normalize method ignores it and lets the virt driver take priority. However, with change I6a706ec5966cdc85f97223617662fe15d3e6dc08, any virt driver that implements the update_provider_tree() interface is storing the inventory data on the ProviderTree object which gets cached and re-used, meaning once allocation_ratio/reserved is set from RT._normalize_inventory_from_cn_obj, it doesn't get unset and the normalize method always assumes the driver provided a value which should not be changed, even if the configuration value changes. We can make the config option changes take effect by changing the semantics between _normalize_inventory_from_cn_obj and drivers that implement the update_provider_tree interface, like for the libvirt driver. Effectively with this change, when a driver implements update_provider_tree(), they now control setting the allocation_ratio and reserved resource amounts for inventory they report. The libvirt driver will use the same configuration option values that _normalize_inventory_from_cn_obj used. The only difference is in update_provider_tree we don't have the ComputeNode facade to get the "real" default values when the allocation_ratio is 0.0, so we handle that like "CONF.cpu_allocation_ratio or 16.0". Eventually that will get cleaned up with blueprint initial-allocation-ratios. Change-Id: I72c83a95dabd581998470edb9543079acb6536a5 Closes-Bug: #1799727
Team and repository tags
OpenStack Nova
OpenStack Nova provides a cloud computing fabric controller, supporting a wide variety of compute technologies, including: libvirt (KVM, Xen, LXC and more), Hyper-V, VMware, XenServer, OpenStack Ironic and PowerVM.
Use the following resources to learn more.
API
To learn how to use Nova's API, consult the documentation available online at:
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Operators
To learn how to deploy and configure OpenStack Nova, consult the documentation available online at:
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For information on how to contribute to Nova, please see the contents of the CONTRIBUTING.rst.
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Other Information
During each Summit and Project Team Gathering, we agree on what the whole community wants to focus on for the upcoming release. The plans for nova can be found at: