Kubernetes v1.23.0-alpha.3 is live!

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Adolfo García Veytia

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Sep 28, 2021, 12:28:08 PM9/28/21

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Kubernetes Community,

Kubernetes v1.23.0-alpha.3 has been built and pushed using Golang version 1.17.1.

The release notes have been updated in CHANGELOG-1.23.md, with a pointer to them on GitHub:

v1.23.0-alpha.3

Downloads for v1.23.0-alpha.3

Source Code

filename	sha512 hash
kubernetes.tar.gz	083e6ca03c9d701768b1b5666f354223a3f7dca9fc6410ce45bbf5947152620e300b46df9b6019134e7d736ba44916537eb3bea8fa57e5f7bc3cc34898b4a5dd
kubernetes-src.tar.gz	c3fc74d52e1b7e808c03b9caa30e3e73be30eb8330ce676000b93d5324bbdba93bd005d125b999ba937b79d4751af99b37986911365416f7175d223345f95914

Client Binaries

filename	sha512 hash
kubernetes-client-darwin-amd64.tar.gz	31d8adc657afbd305df18bfec397a825536357e23b241a19aa538b6ddefefc59743f737db98756e04deea89cc6f260d40a80f02b4d1dc34af1d19e8d796dcd8a
kubernetes-client-darwin-arm64.tar.gz	b69c4d6cde1c476bafa2ca9916ce3e5bf7286be0ff6a08193bdd1a954ba89b64b1b14193d1acec17ccc141024ee3097971448017b5c9f1327e0961b1e92b2224
kubernetes-client-linux-386.tar.gz	059f25ee48aa4b0d1621d6ba87af8fb7e765634d723d98a4e9739f50d3703e7dd3973f4d1ed886c0f3ad6eba165ed81d4e63ecde3b39e66fcbec7d3aa2dfed2e
kubernetes-client-linux-amd64.tar.gz	291dba14160803065895799adcde39bdad7a5b0372403f283d6d5e9a094fe1fc79c70e7546f93ee692b9fd297e2667cb558e4209161ecb4bf89965df5746ed4d
kubernetes-client-linux-arm.tar.gz	988e12cd7466033578acc487447df376c409e4f79726a4721af1aedbe931e927b22a93d6224891b61b55c7a0ec12e42d8cfcd40e15a9a0cbbc1dbf0e59ab0341
kubernetes-client-linux-arm64.tar.gz	b3f21dac41b38e671fa7a95892468e2c27fab51abf9c77b336550e5ec213af204e16cac11dd76262fedb0087cf5ad1950af7e36599a38d50cc270cf831cd4f0b
kubernetes-client-linux-ppc64le.tar.gz	beebf01e2e4ff09bb711284bb9a5c7cc519e4ac8a826dc829394fa28bd9a3149ba73088eaf6712d39a8cab96b0a1c2859e9d5955fee892b759eaddcdeaa8b93c
kubernetes-client-linux-s390x.tar.gz	87e5d3d8ba01f9fefb2300e9f06146a254d39d72eaa10cad8c444428b738b3763483ee9eb82f0a13d2ff5aba35fdcb4320598fd5a6a2a07ea3fd00b4ac682d3c
kubernetes-client-windows-386.tar.gz	71bfc5a1df9c47735476af10225830212f68c83357ff7d443e18f9b7881524db910781a95d11ff6697cb587352059b5841f7b24fda40b5302ad252bfb6da7e51
kubernetes-client-windows-amd64.tar.gz	078b0c698f9535f3eee41ecf162d57e2ace67243da36067b78b30cfbb7b27cfcf97af4c5db48cdd592953e26b42b31794002eb96317476849e89e2126c6df99d

Server Binaries

filename	sha512 hash
kubernetes-server-linux-amd64.tar.gz	951b790158dadf46c32e1a1e9c12f2cc8f41e1645602ebff6b4130a08a377bc6d92549186b420332d620d67191123d98a5d717ac0f5ee9643bebe88947ead8fa
kubernetes-server-linux-arm.tar.gz	0e7a5b9f39b4f45c45bdb5a19dd3695d28f53e1039d76bc572421c707917944d28b1dbfc36e59214b5bc2b93a787900d8e6eb0b587aa801ea8a8faacdb814a4e
kubernetes-server-linux-arm64.tar.gz	921e060120b8651a0f80977360faca9f207189cee10bc61f669ceba4e540ef48c0ceff1a877ee4c7d31b01b88096bce93c577f68f93b2341c8542dfd89972b60
kubernetes-server-linux-ppc64le.tar.gz	292cde446b754a87f4ef5384fadbd30017e53ed2744d45a724be467c86ccd9837bfb490db6396642a869937f2f0d080d9655e89ca3345f8365d109a9bcdd18d9
kubernetes-server-linux-s390x.tar.gz	e0ea667f828ce3b36ca4b2a05fb286da5eb321852c50caf0957694553caf2908b27bcc37a5a82277a2606cf6ff4d9e33617ad61628845d9c21f5cf68c960ca92

Node Binaries

filename	sha512 hash
kubernetes-node-linux-amd64.tar.gz	e13cd3f75628d354bd1544a5495600fb905741431eb4af4da3d980cc0b7565e3f9c1585d9686cc4e967e54fb854f05bbedfe0c60bb7b855fa027ac8ac45b26e0
kubernetes-node-linux-arm.tar.gz	6c91b42350528692ff558b667bffd41c5b967c7aa6101471274e4b16b0ac6f84afe01722881328fd4f6f8fe71c7852620fa000186c6f7e56e498fcc2c67ad793
kubernetes-node-linux-arm64.tar.gz	81728e1388e9cdb436d6847c868f28ab2771331e5e40cd5a7af13cb8dc80a7e4e66a215c12f8183b4884807a3962f913ef5343b889e3c4ecd0e410e8d53aaea9
kubernetes-node-linux-ppc64le.tar.gz	299649f1b25cc38f3a7543ef4d3ee6d42c85e24ac41b4eb61927bc5c5f0c533a39f9ddd4d5ad1df54c625d77aeb41f6c31b1ca7fd8983262f84fefdf1cb2cfd0
kubernetes-node-linux-s390x.tar.gz	fd6cbc93f98abff9803b43215af6e75a4f7b91ca06969220a779468f34b5ec5ec69f20b529e0cd7b10ba8769bbe2507d46f84ce1d8cd0760380ab9264dd94672
kubernetes-node-windows-amd64.tar.gz	a5bfaf2e3ad8d3d2127c3e3e0f131c615a03563253da6bf0e1fd793f6ef71287f341ce1bd0d35eb9a81e0721a5baf03e7c72863b5ed8eb45e8fe70573904ed54

Changelog since v1.23.0-alpha.2

Changes by Kind

Deprecation

Remove 'master' as a valid EgressSelection type in the EgressSelectorConfiguration API. (#102242, @pacoxu) [SIG API Machinery and Cloud Provider]
Remove VolumeSubpath feature gate (#105090, @saad-ali) [SIG Apps, Node and Storage]
The deprecated --experimental-bootstrap-kubeconfig flag has been removed. This can be set via --bootstrap-kubeconfig. (#103172, @niulechuan) [SIG Node]

API Change

Client-go impersonation config can specify a UID to pass impersonated uid information through in requests. (#104483, @margocrawf) [SIG API Machinery, Auth and Testing]
IPv6DualStack feature moved to stable. Controller Manager flags for the node IPAM controller have slightly changed:
1. When configuring a dual-stack cluster, the user must specify both --node-cidr-mask-size-ipv4 and --node-cidr-mask-size-ipv6 to set the per-node IP mask sizes, instead of the previous --node-cidr-mask-size flag.
2. The --node-cidr-mask-size flag is mutually exclusive with --node-cidr-mask-size-ipv4 and --node-cidr-mask-size-ipv6.
3. Single-stack clusters do not need to change, but may choose to use the more specific flags. Users can use either the older --node-cidr-mask-size flag or one of the newer --node-cidr-mask-size-ipv4 or --node-cidr-mask-size-ipv6 flags to configure the per-node IP mask size, provided that the flag's IP family matches the cluster's IP family (--cluster-cidr). (#104691, @khenidak) [SIG API Machinery, Apps, Auth, Cloud Provider, Cluster Lifecycle, Network, Node and Testing]
Kubelet: turn the KubeletConfiguration v1beta1 ResolverConfig field from a string to *string. (#104624, @Haleygo) [SIG Cluster Lifecycle and Node]

Feature

Add mechanism to load simple sniffer class into fluentd-elasticsearch image (#92853, @cosmo0920) [SIG Cloud Provider and Instrumentation]
Kubeadm: do not check if the '/etc/kubernetes/manifests' folder is empty on joining worker nodes during preflight (#104942, @SataQiu) [SIG Cluster Lifecycle]
The kube-apiserver's Prometheus metrics have been extended with some that describe the costs of handling LIST requests. They are as follows.
- apiserver_cache_list_total: Counter of LIST requests served from watch cache, broken down by resource_prefix and index_name
- apiserver_cache_list_fetched_objects_total: Counter of objects read from watch cache in the course of serving a LIST request, broken down by resource_prefix and index_name
- apiserver_cache_list_evaluated_objects_total: Counter of objects tested in the course of serving a LIST request from watch cache, broken down by resource_prefix
- apiserver_cache_list_returned_objects_total: Counter of objects returned for a LIST request from watch cache, broken down by resource_prefix
- apiserver_storage_list_total: Counter of LIST requests served from etcd, broken down by resource
- apiserver_storage_list_fetched_objects_total: Counter of objects read from etcd in the course of serving a LIST request, broken down by resource
- apiserver_storage_list_evaluated_objects_total: Counter of objects tested in the course of serving a LIST request from etcd, broken down by resource
- apiserver_storage_list_returned_objects_total: Counter of objects returned for a LIST request from etcd, broken down by resource (#104983, @MikeSpreitzer) [SIG API Machinery and Instrumentation]
Turn on CSIMigrationAzureDisk by default on 1.23 (#104670, @andyzhangx) [SIG Cloud Provider]

Bug or Regression

Changes behaviour of kube-proxy start; does not attempt to set specific sysctl values (which does not work in recent Kernel versions anymore in non-init namespaces), when the current sysctl values are already set higher. (#103174, @Napsty) [SIG Network]
Fix job controller syncs: In case of conflicts, ensure that the sync happens with the most up to date information. Improves reliability of JobTrackingWithFinalizers. (#105214, @alculquicondor) [SIG Apps]
Fix system default topology spreading when nodes don't have zone labels. Pods correctly spread by default now. (#105046, @alculquicondor) [SIG Scheduling]
Headless Services with no selector which were created without dual-stack enabled will be defaulted to RequireDualStack instead of PreferDualStack. This is consistent with such Services which are created with dual-stack enabled. (#104986, @thockin) [SIG Network]
Kube-apiserver: events created via the events.k8s.io API group for cluster-scoped objects are now permitted in the default namespace as well for compatibility with events clients and the v1 API (#100125, @h4ghhh) [SIG API Machinery, Apps and Testing]
Kube-controller incorrectly enabled support for generic ephemeral inline volumes if the storage object in use protection feature was enabled. (#104913, @pohly) [SIG API Machinery]
Kubeadm: switch the preflight check (called 'Swap') that verifies if swap is enabled on Linux hosts to report a warning instead of an error. This is related to the graduation of the NodeSwap feature gate in the kubelet to Beta and being enabled by default in 1.23 - allows swap support on Linux hosts. In the next release of kubeadm (1.24) the preflight check will be removed, thus we recommend that you stop using it - e.g. via --ignore-preflight-errors or the kubeadm config. (#104854, @pacoxu) [SIG Cluster Lifecycle]
Makes the etcd client (used by the API server) retry certain types of errors. The full list of retriable (codes.Unavailable) errors can be found at https://github.com/etcd-io/etcd/blob/main/api/v3rpc/rpctypes/error.go#L72 (#105069, @p0lyn0mial) [SIG API Machinery]
When a static pod file is deleted and recreated while using a fixed UID, the pod was not properly restarted. (#104847, @smarterclayton) [SIG Node and Testing]
XFS-filesystems are now force-formatted (option -f) in order to avoid problems being formatted due to detection of magic super-blocks. This aligns with the behaviour of formatting of ext3/4 filesystems. (#104923, @davidkarlsen) [SIG Storage]

Other (Cleanup or Flake)

Enhanced error message for nodes not selected by scheduler due to pod's PersistentVolumeClaim(s) bound to PersistentVolume(s) that do not exist. (#105196, @yibozhuang) [SIG Scheduling and Storage]
Kubeadm: remove the --port flag from the manifest for the kube-scheduler since the flag has been a NO-OP since 1.23 and insecure serving was removed for the component. (#105034, @pacoxu) [SIG Cluster Lifecycle]
Migrate cmd/proxy/{config, healthcheck, winkernel} to structured logging (#104944, @jyz0309) [SIG Network]
Migrate cmd/proxy/app and pkg/proxy/meta_proxier to structured logging (#104928, @jyz0309) [SIG Apps, Cluster Lifecycle, Network, Node and Testing]
Migrate pkg/proxy to structured logs (#104908, @CIPHERTron) [SIG Network]
Migrated pkg/proxy/winuserspace to structured logging (#105035, @shivanshu1333) [SIG Network]
The BoundServiceAccountTokenVolume feature gate that is GA since v1.22 is unconditionally enabled, and can no longer be specified via the --feature-gates argument. (#104167, @ialidzhikov) [SIG Auth]
The SupportPodPidsLimit and SupportNodePidsLimit feature gates that are GA since v1.20 are unconditionally enabled, and can no longer be specified via the --feature-gates argument. (#104163, @ialidzhikov) [SIG Node]
Update build images to Debian 11 (Bullseye)
- debian-base:bullseye-v1.0.0
- debian-iptables:bullseye-v1.0.0
- go-runner:v2.3.1-go1.17.1-bullseye.0
- kube-cross:v1.23.0-go1.17.1-bullseye.1
- setcap:bullseye-v1.0.0
- cluster/images/etcd: Build 3.5.0-2 image
- test/conformance/image: Update runner image to base-debian11 (#105158, @justaugustus) [SIG API Machinery, Architecture, Release and Testing]

Dependencies

Added

Nothing has changed.

Changed

Removed

Nothing has changed.

Contributors, the CHANGELOG-1.23.md has been bootstrapped with v1.23.0-alpha.3 release notes and you may edit now as needed.