91804a5e16
The Azure SDK for Python uses threads to manage async operations.
Every time a virtual machine is created, a new thread is spawned
to wait for it to finish (whether we actually end up polling it or
not). This will cause the Azure driver to have significant
scalability limits compared to other drivers, possibly limiting
the number of simultaneous nodes to 50% compared to others.
To address this, switch to using a very simple requests-based
REST client I'm calling Azul. The consistency of the Azure API
makes this simple. As a bonus, we can use the excellent Azure
REST API documentation directly, rather that mapping attribute
names through the Python SDK (which has subtle differences).
A new fake Azure test fixture is also created in order to make
the current unit test a more thorough exercise of the code.
Finally, the "zuul-private-key" attribute is misnamed since we
have a policy of a one-way dependency from Zuul -> Nodepool. It's
name is updated to match the GCE driver ("key") and moved to the
cloud-image section so that different images may be given different
keys.
Change-Id: I87bfa65733b2a71b294ebe2cf0d3404d0e4333c5
Nodepool
Nodepool is a system for managing test node resources. It supports launching single-use test nodes from cloud providers as well as managing access to pre-defined pre-existing nodes. Nodepool is part of a suite of tools that form a comprehensive test system, including Zuul.
The latest documentation for Nodepool is published at: https://zuul-ci.org/docs/nodepool/
The latest documentation for Zuul is published at: https://zuul-ci.org/docs/zuul/
Getting Help
There are two Zuul-related mailing lists:
- zuul-announce
-
A low-traffic announcement-only list to which every Zuul operator or power-user should subscribe.
- zuul-discuss
-
General discussion about Zuul, including questions about how to use it, and future development.
You will also find Zuul developers in the #zuul channel on Freenode IRC.
Contributing
To browse the latest code, see: https://opendev.org/zuul/nodepool To clone the latest code, use git clone https://opendev.org/zuul/nodepool
Bugs are handled at: https://storyboard.openstack.org/#!/project/zuul/nodepool
Code reviews are handled by gerrit at https://review.opendev.org
After creating a Gerrit account, use git review to submit patches. Example:
# Do your commits
$ git review
# Enter your username if promptedJoin #zuul on Freenode to discuss development or usage.
License
Nodepool is free software, licensed under the Apache License, version 2.0.
Python Version Support
Nodepool requires Python 3. It does not support Python 2.