Kubernetes v1.31.0-alpha.2 is live!

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Meha Bhalodiya

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Jun 18, 2024, 1:32:05 PMJun 18

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Kubernetes Community,

Kubernetes v1.31.0-alpha.2 has been built and pushed using Golang version 1.22.4.

The release notes have been updated in CHANGELOG-1.31.md, with a pointer to them on GitHub:

v1.31.0-alpha.2

Downloads for v1.31.0-alpha.2

Source Code

filename	sha512 hash
kubernetes.tar.gz	16c79d46cc58352ebccbe1be1139dfc8cfd6ac522fa6e08ea54dbf1d5f9544a508431f43f82670f1a554ac9a7059307a74e20c1927f41c013cacad80951bf47d
kubernetes-src.tar.gz	ad7637808305ea59cd61e27788fb81f51b0e5c41355c189f689a7a8e58e0d1b6fb0cd278a29fa0c74b6307b1af3a37667650e72bb6d1796b2dc1c7c13f3f4539

Client Binaries

filename	sha512 hash
kubernetes-client-darwin-amd64.tar.gz	358ee8f7e6a3afa76bdc96a2c11463b42421ee5d41ec6f3eeaaf86ccd34eb433b0c0b20bf0097085758aa95b63dce18357d34f885662724c1d965ff4f2bd21a2
kubernetes-client-darwin-arm64.tar.gz	2ce564a16b49f4da3e2fa322c3c1ee4fcc02b9a12f8261232d835094222455c9b2c55dd5fce7980aa5bf87e40752875b2124e31e93db9558ca25a4a466beec15
kubernetes-client-linux-386.tar.gz	fcd1e9ed89366af00091d3626d4e3513d3ea329b25e0a4b701f981d384bc71f2a348ccd99e6c329e7076cd75dab9dc13ab31b4818b24596996711bc034c58400
kubernetes-client-linux-amd64.tar.gz	e7b705bb04de6eca9a633a4ff3c2486e486cbd61c77a7c75c6d94f1b5612ed1e6f852c060c0194d5c2bfd84d905cdb8ea3b19ddbedb46e458b23db82c547d3a7
kubernetes-client-linux-arm.tar.gz	93c5385082ecf84757ff6830678f5469a5b2463687d8a256f920c0fd25ed4c08bd06ec2beaf507d0bbe10d9489632349ee552d8d3f8f861c9977ff307bb89f23
kubernetes-client-linux-arm64.tar.gz	e9427fe6e034e9cec5b522b01797e3144f08ba60a01cd0c86eba7cb27811e470c0e3eb007e6432f4d9005a2cc57253956b66cd2eb68cd4ae73659193733910df
kubernetes-client-linux-ppc64le.tar.gz	91a3b101a9c5f513291bf80452d3023c0000078c16720a2874dd554c23a87d15632f9e1bf419614e0e3a9d8b2f3f177eee3ef08d405aca3c7e3311dec3dfebba
kubernetes-client-linux-s390x.tar.gz	1cda8de38ccdc8fbf2a0c74bd5d35b4638f6c40c5aa157e2ade542225462a662e4415f3d3abb31c1d1783c7267f16530b3b392e72b75b9d5f797f7137eecba66
kubernetes-client-windows-386.tar.gz	c7fe8d85f00150778cc3f3bde20a627cd160f495a7dcd2cf67beb1604c29b2f06c9e521d7c3249a89595d8cda4c2f6ac652fa27ec0dd761e1f2539edcbb5d0ef
kubernetes-client-windows-amd64.tar.gz	62315ae783685e5cb74e149da7d752973d115e95d5c0e58c1c06f8ceec925f4310fb9c220be42bad6fd7dc4ff0540343a4fff12767a5eb305a29ff079f3b940a
kubernetes-client-windows-arm64.tar.gz	eddd92de174554f026d77f333eac5266621cffe0d07ad5c32cf26d46f831742fa3b6f049494eb1a4143e90fdded80a795e5ddce37be5f15cd656bdc102f3fcb2

Server Binaries

filename	sha512 hash
kubernetes-server-linux-amd64.tar.gz	c561ebdfb17826faefcc44d4b9528890a9141a31e6d1a6935cce88a4265ba10eddbd0726bd32cffcdd09374247a1d5faf911ca717afc9669716c6a2e61741e65
kubernetes-server-linux-arm64.tar.gz	3faed373e59cef714034110cdbdd33d861b72e939058a193f230908fea4961550216490e5eca43ffaa838cd9c2884267c685a0f4e2fc686fd0902bbb2d97a01c
kubernetes-server-linux-ppc64le.tar.gz	336d38807433e32cdcb09a0a2ee8cbb7eb2d13c9d991c5fc228298c0bec13d45b4b001db96199498a2f0f106d27c716963b6c49b9f40e07f8800801e3cea5ec9
kubernetes-server-linux-s390x.tar.gz	2ebc780b3323db8209f017262e3a01c040d3ee986bdd0732085fbe945cb0e135a1c8bd4adf31ded6576e19e2b5370efded9f149ef724ad5e2bbddf981e8c1bda

Node Binaries

filename	sha512 hash
kubernetes-node-linux-amd64.tar.gz	2e6d0a1d6698be1ffeadf54da70cb4b988ead6ed9e232372d008f2ec49cb1dd9e30efa5a2cc7f1768d1b9c6facde002b39931433e3a239df46f6db0c067dbbac
kubernetes-node-linux-arm64.tar.gz	7fa93c164097f60bb6dcbaccf87024a5c6fb300915a46bf1824c57472d198c6e52c39fa27d0e3cd55acb55833579dd6ddb4024e1500f7998140ef10dbec47b22
kubernetes-node-linux-ppc64le.tar.gz	b6ae26348b3703680c15d508b65253d0e58d93d3b435668a40a1d5dd65b5ed6ab2b0190ca6ea77d2091f7223dad225e3f671ae72bda4ed5be0d29b753ad498b6
kubernetes-node-linux-s390x.tar.gz	5247cfa0499518bc5f00dda154c1dd36ef5b62e1a2861deb3a36e3a5651eefd05f7a2004eba6500912cafd81ce485f172014c8680178ab8d3ba981616c467dea
kubernetes-node-windows-amd64.tar.gz	5c29c702fbb78b53961e2afe3f51604199abcd664a270fbf2ff3b0273b983a02fbbbae4253a652ea4cd7cbef0543fe3b012c00f88e8071d9213f7cb6c4e86bda

Container Images

All container images are available as manifest lists and support the described architectures. It is also possible to pull a specific architecture directly by adding the "-$ARCH" suffix to the container image name.

name	architectures
registry.k8s.io/conformance:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-apiserver:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-controller-manager:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-proxy:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-scheduler:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x
registry.k8s.io/kubectl:v1.31.0-alpha.2	amd64, arm64, ppc64le, s390x

Changelog since v1.31.0-alpha.1

Urgent Upgrade Notes

(No, really, you MUST read this before you upgrade)

The scheduler starts to use QueueingHint registered for Pod/Updated event to determine whether unschedulable Pods update make them schedulable, when the feature gate SchedulerQueueingHints is enabled. Previously, when unschedulable Pods are updated, the scheduler always put Pods back to activeQ/backoffQ. But, actually not all updates to Pods make Pods schedulable, especially considering many scheduling constraints nowadays are immutable. Now, when unschedulable Pods are updated, the scheduling queue checks with QueueingHint(s) whether the update may make the pods schedulable, and requeues them to activeQ/backoffQ only when at least one QueueingHint(s) return Queue.

Action required for custom scheduler plugin developers: Plugins have to implement a QueueingHint for Pod/Update event if the rejection from them could be resolved by updating unscheduled Pods themselves. Example: suppose you develop a custom plugin that denies Pods that have a schedulable=false label. Given Pods with a schedulable=false label will be schedulable if the schedulable=false label is removed, this plugin would implement QueueingHint for Pod/Update event that returns Queue when such label changes are made in unscheduled Pods. (#122234, @AxeZhan) [SIG Scheduling and Testing]

Changes by Kind

API Change

Fixed incorrect "v1 Binding is deprecated in v1.6+" warning in kube-scheduler log. (#125540, @pohly) [SIG API Machinery]

Feature

Feature gates for PortForward (kubectl port-forward) over WebSockets are now enabled by default (Beta).
- Server-side feature gate: PortForwardWebsocket
- Client-side (kubectl) feature gate: PORT_FORWARD_WEBSOCKETS environment variable
- To turn off PortForward over WebSockets for kubectl, the environment variable feature gate must be explicitly set - PORT_FORWARD_WEBSOCKETS=false (#125528, @seans3) [SIG API Machinery and CLI]
Introduces new functionality to the client-go's List method, allowing users to enable API streaming. To activate this feature, users can set the client-go.WatchListClient feature gate.
It is important to note that the server must support streaming for this feature to function properly. If streaming is not supported by the server, client-go will revert to using the normal LIST method to obtain data. (#124509, @p0lyn0mial) [SIG API Machinery, Auth, Instrumentation and Testing]
Kubeadm: enabled the v1beta4 API. For a complete changelog since v1beta3 please see https://kubernetes.io/docs/reference/config-api/kubeadm-config.v1beta4/.
The API does include a few breaking changes:
- The "extraArgs" component construct is now a list of "name"/"value" pairs instead of a string/string map. This has been done to support duplicate args where needed.
- The "JoinConfiguration.discovery.timeout" field has been replaced by "JoinConfiguration.timeouts.discovery".
- The "ClusterConfiguration.timeoutForControlPlane" field has been replaced by "{Init|Join}Configuration.timeouts.controlPlaneComponentHealthCheck". Please use the command "kubeadm config migrate" to migrate your existing v1beta3 configuration to v1beta4.
v1beta3 is now marked as deprecated but will continue to be supported until version 1.34 or later. The storage configuration in the kube-system/kubeadm-config ConfigMap is now a v1beta4 ClusterConfiguration. (#125029, @neolit123) [SIG Cluster Lifecycle]
LogarithmicScaleDown is now GA (#125459, @MinpengJin) [SIG Apps and Scheduling]

Failing Test

Fixed issue where following Windows container logs would prevent container log rotation. (#124444, @claudiubelu) [SIG Node, Testing and Windows]
Pkg k8s.io/apiserver/pkg/storage/cacher, method (*Cacher) Wait(context.Context) error (#125450, @mauri870) [SIG API Machinery]

Bug or Regression

DRA: enhance validation for the ResourceClaimParametersReference and ResourceClassParametersReference with the following rules:
1. apiGroup: If set, it must be a valid DNS subdomain (e.g. 'example.com').
2. kind and name: It must be valid path segment name. It may not be '.' or '..' and it may not contain '/' and '%' characters. (#125218, @carlory) [SIG Node]
Kubeadm: fixed a regression where the JoinConfiguration.discovery.timeout was no longer respected and the value was always hardcoded to "5m" (5 minutes). (#125480, @neolit123) [SIG Cluster Lifecycle]

Other (Cleanup or Flake)

Removed generally available feature gate ReadWriteOncePod. (#124329, @chrishenzie) [SIG Storage]

Dependencies

Added

Nothing has changed.

Changed

sigs.k8s.io/apiserver-network-proxy/konnectivity-client: v0.29.0 → v0.30.3

Removed

Nothing has changed.

Contributors, the CHANGELOG-1.31.md has been bootstrapped with v1.31.0-alpha.2 release notes and you may edit now as needed.