24405c9c74
Change-Id: I1d42b3425c948e1e735ba3acaa2ede2b92b050c7
25 lines
1.0 KiB
YAML
25 lines
1.0 KiB
YAML
---
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prelude: >
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This is the first 4.x release of Zuul. It requires some deployment
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changes by operators which have been carefully planned in order to
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facilitate work on Zuul version 5, which will be the first version
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of Zuul where every component is fault tolerant and able to scale.
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If you read the release notes for the last 3.x release, you may have
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already made all of the required changes. If not, please do so
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before upgrading to version 4. Every required change in version 4
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is optionally supported in 3.19, so it is safe to make these changes
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and then upgrade.
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Please read all of the notes below, especially in the "Upgrading"
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section for details. The primary additional requirements are:
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* TLS ZooKeeper connections
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* Network connectivity from all components to ZooKeeper
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* An SQL database
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With these changes in place, it is anticipated that further upgrades
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to Zuul made in support of the scale-out-scheduler work will be done
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with minimal disruption in the course of normal releases between
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version 4 and 5.
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