qemu-img attempts to launch multiple threads by default *and* attempts to have multiple memory allocation arenas to operate from. While multithreading can be good for performance, this pattern and the memory footprint for process launch and dependencies can turn the memory footprint for a cirros image conversion (16MB) into 1.2GB of memory being asked for by the qemu-img tool. In order to limit this impact, as the default number of arenas is governed by the number of CPUs times the number 8, it seems reasonable to lower this to a more reasonable number which also helps keep our possible memory footprint from being exceeded. NOTE: This change is largely different than the original change as an intermediate change converted write_image.sh to python. As it is unlikely for us to backport the intermediate change, it is logical for us to just modify the original script. Otherwise the release note is ultimately what is backported for release note tooling continutity. Change-Id: I71a28ec59ec31c691205eb34d9fcab63a2ccb682 Story: 2008928 Task: 42528 (cherry picked from commit
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Ironic Python Agent
Team and repository tags
An agent for controlling and deploying Ironic controlled baremetal nodes.
The ironic-python-agent works with the agent driver in Ironic to provision the node. Starting with ironic-python-agent running on a ramdisk on the unprovisioned node, Ironic makes API calls to ironic-python-agent to provision the machine. This allows for greater control and flexibility of the entire deployment process.
The ironic-python-agent may also be used with the original Ironic pxe drivers as of the Kilo OpenStack release.
Building the IPA deployment ramdisk
For more information see the Image Builder section of the Ironic Python Agent developer guide.
Using IPA with devstack
This is covered in the Deploying Ironic with DevStack section of the Ironic dev-quickstart guide.
Project status, features, and bugs are tracked on StoryBoard:
Developer documentation can be found here:
Release notes for the project are available at:
Source code repository for the project is located at:
- IRC channel:
To contribute, start here: Openstack: How to contribute.