15b8bf7466
This change makes the metastatic driver handle cases where it has backing nodes in its in-memory records that do not exist anymore. This can happen when there are two equal metastatic providers running in parallel [1], where one of them removes a backing node (e.g. when it reached its max-grace-time) but the other one not knowing about this because each has their own in-memory records. Until now, this leads to unrecoverable errors, because the metastatic driver keeps trying to load node data from zk for a backing node that is not existing. Instead, when we encounter such a node, delete it from the backing node records and try again (creating a new backing node). [1] This usually happens on rolling restarts, where one launcher instance is kept running until a new one is ready to take over the work. Change-Id: I9a92b1fbe23e4627eca0354080165ab06f19f6d2
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
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A low-traffic announcement-only list to which every Zuul operator or power-user should subscribe.
- zuul-discuss
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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
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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.