Kubernetes v1.33.0-alpha.2 is live!

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Jim Angel

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Feb 18, 2025, 2:18:26 PMFeb 18
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Kubernetes Community,

Kubernetes v1.33.0-alpha.2 has been built and pushed using Golang version 1.23.6.

The release notes have been updated in CHANGELOG-1.33.md, with a pointer to them on GitHub:

v1.33.0-alpha.2

Downloads for v1.33.0-alpha.2

Source Code

filenamesha512 hash
kubernetes.tar.gzee13af765b25d466423e51cea5359effb1a095b9033032040bca8569a372656ab27ec38b8b9a4a85a7256f6390c33c0cb7d145ce876ccf282cdf5b3224560724
kubernetes-src.tar.gzbc32551357ae67573ac9ab4c650bcd547f46a29848e20fc3db286d0e45a22ed254ee2c8d6fe84c4288ebc3df6c3acb118435a532c9cf9f3f5e8d33f4512de806

Client Binaries

filenamesha512 hash
kubernetes-client-darwin-amd64.tar.gzaab9eac3bc604831cfdc926f6d3f12afe6266a2c3808503141ad5780ffcd188f08db3fbad4fedc73da1c612d19bd2e55ba13031fef22ea4839cb294eb54b5767
kubernetes-client-darwin-arm64.tar.gz373fa812af4ed11b9a3b278c44335fd3618c9fb77aa789311e07e37c4bad81e08b066528dd086356e0bb1e116fa807f0015bc71f225afd5bef4dbbe3079034e1
kubernetes-client-linux-386.tar.gze9f8a8925b2b7d3cf89dbaad251f0224945be354ae62c7736b891c73e19334039e68ac7b2dda99f26df0d7028127ccb630de085d2ad45255e263cb03f1f1e552
kubernetes-client-linux-amd64.tar.gz305ea43a314586911f32ae43b16f7a29274fe2a7d87b00b9fb57a4c5c885187a317272c731ddf9d41335905ff5f3640d7a4df7e68d070076e20ff1b2a32a78cd
kubernetes-client-linux-arm.tar.gzf012b9e7d46874748655782e125a1a9b7d22c9bee77226eea9c789bc67f5644a9c8380d5fa5d7cc161659011266b9be060dd663603d85b7256deaab4866697c2
kubernetes-client-linux-arm64.tar.gz6952882b71ccc27412fce180844f2a5f9c147b5fb59c4b684d338b3cc767c6e0257f8edde1d1874acda0299ac7c22dba3788292dcbb083fdcc5e61387e8a16a8
kubernetes-client-linux-ppc64le.tar.gzd4138ece8741e29c4d4fce07cd9cda38f622b5133a8757334cf5992e3242791213391c2a7ae7db95fee1d70d31b17fda3215d591fb8c9788e0e7d606fcc3a87f
kubernetes-client-linux-s390x.tar.gz511c4c53b20ecff1fc200e85a14211781e0d887a5536a3343a6a0c8ce05c175d073b810945fd1ddd2389318ea26e0ca412b7025ce9f168b76ad24a7ee85213a7
kubernetes-client-windows-386.tar.gz68b781adad28a0ac8e19a624e6811f4e593ad4a1422294a40aa356f8ac05dfc5978f90b55a8716059b4a613caad8904961e9c7e74a4a803fed76c98739b126dd
kubernetes-client-windows-amd64.tar.gz009f05ff583c6b43ffea01e9ff2f7e3cc13184646ce358338a2a1188f4750b02a9253a250c977576664d4d173ce8469a0d1be9a3968890a99969292ad1e001ec
kubernetes-client-windows-arm64.tar.gz88dcf4ee3f86484d882632a10e63b7b6e64b844b17c3cc674a49e5ddab9cea091710e4503c46ee59d70fcf762dd1c4e954f5091154d23747a528ffa31d593273

Server Binaries

filenamesha512 hash
kubernetes-server-linux-amd64.tar.gz8023512c58f639b20bca94aa7bc3e908cd9fe2e213b655d1ad63da1507223651c6eb61ddf0d6670d664080e19e714640e3cf5aab4b9c6eb62fc0166cceabd3fd
kubernetes-server-linux-arm64.tar.gz7bb2a4530294bafb8f43ddfcfeefdd3fc8629c8dbfd11c2e789a59a930fe624262698311ed149e2c98cdde9bbf321b8c77213b4f562a5120a35ae645d1abf1ce
kubernetes-server-linux-ppc64le.tar.gz2f0071550e98d58b87dc56e5d27a1832827b256aa77ad4f68c3713ecd9e81fa66822d7604988c617c139d7e131e05664409f48f94f450cef467ab63727527e14
kubernetes-server-linux-s390x.tar.gz620241063ca4f09b4c71a3659e301246e82d841921e7956759d4a3a74bae7dff1d0951f5aea6928039714569ffbb5040f1ca73633bd90123000f4e18e9f196df

Node Binaries

filenamesha512 hash
kubernetes-node-linux-amd64.tar.gzd54a8d3406df58a6941837e988e32cdc93bd5025dca1910dbcc1c89d8fa29dc09375c24d7f109fcf4d72c977933c091c225241a0988893a642a35edac04ee38d
kubernetes-node-linux-arm64.tar.gzddbf090dc9be5c30a968b655d2007485b8c94e5d95b7cd7e29bbb47ba562ae3ed5c15b965acd81acb715a8d706d967595601c5f0f8f5d6c0181626dcbe156c02
kubernetes-node-linux-ppc64le.tar.gzc1dd2e061b7b305d481791be17234a5ca02f9c0c302a6044ac2b87940b10c5fc9c2817e00f59adeaab8b564181f8ccda4640dcfde67784daea38361f6faa4b2a
kubernetes-node-linux-s390x.tar.gz90974009d003cb911a54cad11bcca6805ceca64ed39120ce70029ece9c8e9a33d89803e92b5d251dce9f16267143914c1ed8542d9507cb3a020823a35b42cfdb
kubernetes-node-windows-amd64.tar.gzcc82205db3e6b6e1640ddbb4fbf8e1d81409c894c92aec1e2d5941c6a282414ada136d1f95403e25cb1f739095f838f6d40c97e65d2fa1dc2f3e6205bfb67249

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.

namearchitectures
registry.k8s.io/conformance:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-apiserver:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-controller-manager:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-proxy:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-scheduler:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x
registry.k8s.io/kubectl:v1.33.0-alpha.2amd64, arm64, ppc64le, s390x

Changelog since v1.33.0-alpha.1

Changes by Kind

Deprecation

  • The WatchFromStorageWithoutResourceVersion feature flag is deprecated and can no longer be enabled (#129930, @serathius) [SIG API Machinery]

API Change

  • Added support for in-place vertical scaling of Pods with sidecars (containers defined within initContainers where the restartPolicy is Always). (#128367, @vivzbansal) [SIG API Machinery, Apps, CLI, Node, Scheduling and Testing]
  • Kubectl: added alpha support for customizing kubectl behavior using preferences from a kuberc file (separate from kubeconfig). (#125230, @ardaguclu) [SIG API Machinery, CLI and Testing]

Feature

  • Added a /statusz endpoint for kube-controller-manager (#128991, @Henrywu573) [SIG API Machinery, Cloud Provider, Instrumentation and Testing]
  • Fixed SELinuxWarningController defaults when running kube-controller-manager in a container. (#130037, @jsafrane) [SIG Apps and Storage]
  • Graduate BtreeWatchCache feature gate to GA (#129934, @serathius) [SIG API Machinery]
  • Introduced the LegacySidecarContainers feature gate enabling the legacy code path that predates the SidecarContainers feature. This temporary feature gate is disabled by default, only available in v1.33, and will be removed in v1.34. (#130058, @gjkim42) [SIG Node]
  • Kubeadm: 'kubeadm upgrade plan' now supports '--etcd-upgrade' flag to control whether the etcd upgrade plan should be displayed. Add an EtcdUpgrade field into UpgradeConfiguration.Plan for v1beta4. (#130023, @SataQiu) [SIG Cluster Lifecycle]
  • Kubeadm: added preflight check for cp on Linux nodes and xcopy on Windows nodes. These binaries are required for kubeadm to work properly. (#130045, @carlory) [SIG Cluster Lifecycle]
  • Kubeadm: improved kubeadm init and kubeadm join to provide consistent error messages when the kubelet failed or when failed to wait for control plane components. (#130040, @HirazawaUi) [SIG Cluster Lifecycle]
  • Kubeadm: promoted the feature gate ControlPlaneKubeletLocalMode to Beta. Kubeadm will per default use the local kube-apiserver endpoint for the kubelet when creating a cluster with "kubeadm init" or when joining control plane nodes with "kubeadm join". Enabling the feature gate also affects the kubeadm init phase kubeconfig kubelet phase, where the flag --control-plane-endpoint no longer affects the generated kubeconfig Server field, but the flag --apiserver-advertise-address can now be used for the same purpose. (#129956, @chrischdi) [SIG Cluster Lifecycle]
  • Kubernetes is now built with go 1.23.5 (#129962, @cpanato) [SIG Release and Testing]
  • Kubernetes is now built with go 1.23.6 (#130074, @cpanato) [SIG Release and Testing]
  • NodeRestriction admission now validates the audience value that kubelet is requesting a service account token for is part of the pod spec volume. The kube-apiserver featuregate ServiceAccountNodeAudienceRestriction is enabled by default in 1.33. (#130017, @aramase) [SIG Auth]
  • The nftables mode of kube-proxy is now GA. (The iptables mode remains the default; you can select the nftables mode by passing --proxy-mode nftables or using a config file with mode: nftables. See the kube-proxy documentation for more details.) (#129653, @danwinship) [SIG Network]
  • kubeproxy_conntrack_reconciler_deleted_entries_total metric can be used to track cumulative sum of conntrack flows cleared by reconciler (#130204, @aroradaman) [SIG Network]
  • kubeproxy_conntrack_reconciler_sync_duration_seconds metric can be used to track conntrack reconciliation latency (#130200, @aroradaman) [SIG Network]

Bug or Regression

  • Fix: adopt go1.23 behavior change in mount point parsing on Windows (#129368, @andyzhangx) [SIG Storage and Windows]
  • Fixes a regression with the ServiceAccountNodeAudienceRestriction feature where azureFile volumes encounter "failed to get service accoount token attributes" errors (#129993, @aramase) [SIG Auth and Testing]
  • Kube-proxy: fixes a potential memory leak which can occur in clusters with high volume of UDP workflows (#130032, @aroradaman) [SIG Network]
  • Resolves a performance regression in default 1.31+ configurations, related to the ConsistentListFromCache feature, where rapid create / update API requests across different namespaces encounter increased latency. (#130113, @AwesomePatrol) [SIG API Machinery]
  • The response from kube-apiserver /flagz endpoint would respond correctly with parsed flags value. (#129996, @yongruilin) [SIG API Machinery, Architecture, Instrumentation and Testing]
  • When cpu-manager-policy=static is configured containers meeting the qualifications for static cpu assignment (i.e. Containers with integer CPU requests in pods with Guaranteed QOS) will not have cfs quota enforced. Because this fix changes a long-established behavior, users observing a regressions can use the DisableCPUQuotaWithExclusiveCPUs feature gate (default on) to restore the old behavior. Please file an issue if you encounter problems and have to use the Feature Gate. (#127525, @scott-grimes) [SIG Node and Testing]

Other (Cleanup or Flake)

  • Flip StorageNamespaceIndex feature gate to false and deprecate it (#129933, @serathius) [SIG Node]
  • The SeparateCacheWatchRPC feature gate is deprecated and disabled by default. (#129929, @serathius) [SIG API Machinery]

Dependencies

Added

Nothing has changed.

Changed

Removed

Nothing has changed.

Contributors, the CHANGELOG-1.33.md has been bootstrapped with v1.33.0-alpha.2 release notes and you may edit now as needed.

Published by your Kubernetes Release Managers.

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