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new ed4dab04d8 [YUNIKORN-2870] Release notes for 1.6.0 (#469)
ed4dab04d8 is described below
commit ed4dab04d83da1d3aa7d6e4d4a7ee8f2701a1bf2
Author: Peter Bacsko <[email protected]>
AuthorDate: Wed Sep 18 16:54:46 2024 -0500
[YUNIKORN-2870] Release notes for 1.6.0 (#469)
Closes: #469
Signed-off-by: Craig Condit <[email protected]>
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+---
+id: rn-1.6.0
+title: Release Announcement v1.6.0
+---
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# Release Announcement v1.6.0
+We are pleased to announce that the Apache YuniKorn community has voted to
release 1.6.0.
+Apache YuniKorn is a standalone resource scheduler, designed for managing and
scheduling Batch and Data workloads on container
+orchestration frameworks like Kubernetes for on-prem and on-cloud use cases.
+
+## Overview
+The Apache YuniKorn community has resolved 316
[JIRAs](https://issues.apache.org/jira/issues/?filter=12352202) in this release.
+
+Release manager: Peter Bacsko
+
+Release date: 2024-09-17
+
+## Highlights
+
+### Kubernetes version support
+
+YuniKorn 1.6.0 supports running on Kubernetes clusters from version 1.24
through 1.31.
+See [YUNIKORN-2830](https://issues.apache.org/jira/browse/YUNIKORN-2830) for
details.
+
+### Unification of Ask and Allocation
+
+YuniKorn 1.6.0 has been simplified on a code level - we no longer have "Ask"
objects in
+the scheduler core. A resource ask is simply an allocation without a node
assigned
+to it. See
[YUNIKORN-2457](https://issues.apache.org/jira/browse/YUNIKORN-2457) for
+details.
+
+### Preemption hardening
+
+After a more thorough analysis of the preemption feature, we identified
several use cases where
+it works either inconsistently or produces unexpected, non-intuitive results.
+See [YUNIKORN-2493](https://issues.apache.org/jira/browse/YUNIKORN-2493) for
details.
+
+### Establish consistent usage guidelines for labels and annotations
+
+Before YuniKorn 1.6.0, labels and annotations were not used in a consistent
way.
+Certain metadata existed either as a label or annotation. If it existed for
both,
+the precedence was not clear. If both were defined with different values, no
error
+was reported. This was fixed in
[YUNIKORN-2501](https://issues.apache.org/jira/browse/YUNIKORN-2501).
+
+### Support for OIDC credentials
+
+In [YUNIKORN-2281](https://issues.apache.org/jira/browse/YUNIKORN-2281) we
added support
+for OIDC user names. Previously, these were rejected in the admission
controller
+because certain characters were treated as illegal.
+
+### Improved code quality
+
+In [YUNIKORN-182](https://issues.apache.org/jira/browse/YUNIKORN-182) we
improved the
+code quality of Yunikorn so that the Go linters no longer complain about
potential
+coding problems.
+
+Coverage of various parts of the code was significantly enhanced. See the
[JIRA filter](https://issues.apache.org/jira/issues/?filter=12353613)
+for the list of items.
+
+### Deadlock detection, fixed potential locking issues
+
+The tool [go-deadlock](https://github.com/sasha-s/go-deadlock) has been
integrated to the codebase,
+which makes it possible to detect potential deadlocks at runtime. Since this
slows down the scheduler
+and increases memory usage, it's disabled by default. However, it's enabled
during the unit test phase
+with "make test". See
[YUNIKORN-2539](https://issues.apache.org/jira/browse/YUNIKORN-2539) for
details.
+
+With go-deadlock, several potential deadlocks have been identified and fixed in
+[YUNIKORN-2544](https://issues.apache.org/jira/browse/YUNIKORN-2544).
+
+### Reproducible binaries
+
+Before YuniKorn 1.6.0, the binaries we build for YuniKorn differ from one
build to the next.
+We standardized our build output so that independently built binaries from the
same source code can be validated.
+See [YUNIKORN-2419](https://issues.apache.org/jira/browse/YUNIKORN-2419).
+
+## Incompatible changes
+
+### Removed StateAware scheduling
+
+State-aware scheduling has been removed in YuniKorn 1.6.0.
+
+### Plugin mode is deprecated
+
+From YuniKorn 1.6.0, the plugin mode is considered deprecated and no new
plugin-related
+code will be added.
+
+### Fair queue sorting has changed
+
+The previous version of the fair share sorting algorithm was broken and did
not return
+the ratio correctly. This is now fixed in
[YUNIKORN-2678](https://issues.apache.org/jira/browse/YUNIKORN-2678).
+This change fundamentally affects scheduling decisions, because in each cycle
the scheduler might end up choosing
+a different pending request than it did before.
+
+### Default queue is no longer set on the pod
+
+From YuniKorn 1.6.0, the admission controller no longer updates the queue
label on the pod if it's unset.
+See [YUNIKORN-2711](https://issues.apache.org/jira/browse/YUNIKORN-2711) for
details.
+
+## Credits
+The YuniKorn 1.6.0 release would not have been possible without the
+hard work of our community and we would like to thank the following
+contributors to this release:
+
+> ChenChen Lai, amikai, YuTeng Chen, Arthur Wang, Kuan-Po Tseng,
+ Craig Condit, Hsien-Cheng (Ryan) Huang, Jacob Salway, Manikandan R,
+ Michael Akinyemi, mean-world, Mit Desai, Nick Chao, Paul Santa Clara,
+ Peter Bacsko, 400Ping, Qi Zhu, rich7420, Rich Scott, ryankert, Ryan Lo,
+ SHIAO SZU CHEN, SP12893678, steinsgateted, targetoee, Tseng Hsi-Huang,
+ Tzu-Hua Lan, Wilfred Spiegelenburg, Yongjun Zhang, Yu-Lin Chen, YUN SUN
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