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CHANGELOG-1.29.md

v1.29.0

Documentation

Downloads for v1.29.0

Source Code

filename sha512 hash
kubernetes.tar.gz f07879916d7c4c7f8059ff9fd3c0006ce9bceb540874e183268a2bf2936df2632c4a3878a613cf2d695a80796e6c3eb52de5e3d83a73c91cb9a0bb5627091bae
kubernetes-src.tar.gz a37a7927224785625e9863c1e2dcbc88943593d003b8d126fee63770e6b8eff122004d0f80e1301de34e8a2d6ce208ec6fa55cad3bbe8631b92e5469f45bd00d

Client Binaries

filename sha512 hash
kubernetes-client-darwin-amd64.tar.gz 22da1d2a217a8de91c1a8c393d17eb5ca81e243a1a3e509f3a40fb91d623670ace4ee87a09218a184aaa2eec4ca9c5478b992b8c6f136c568767d6e9dea493bf
kubernetes-client-darwin-arm64.tar.gz cbc0cafecae18a50f98aaa8b508b1808a50b7a477638dc8699830a9dae7ffa83641f9fdb9f53616b32ebc8df84835fc847ea252c5ebe647c7d3462029a63b7a0
kubernetes-client-linux-386.tar.gz f7ace756a3b6c56f2620d0ea6236fb94328c0a928094e4be7fbb78990a5771e8628bd93eac34017f3c33505c0248e8a64f933724a5fec6b322cf54dc30901985
kubernetes-client-linux-amd64.tar.gz 6ff15bed6030c47e2ce90723500f08fa9968413f5b858456d4395bc67ab529b0b523ad0521e03be37664965e2fa588680aa0a5180054bc5cb3bafeef1497029b
kubernetes-client-linux-arm.tar.gz bafe1ca945c41ae671029d5398e564bac0753400ee3a50dc0b4979284c0a905e8c77575d8b64b303e9c776d09c919d27f1f99847390d4e2e1c43be826a8dc1a4
kubernetes-client-linux-arm64.tar.gz f3bca520625eaf6e6dd9af4cc709ff20bfce4da298a03e0be8835013a95fe0d6a25693d7702a4739c9477f9d49d2492d739718245ff91716fff90f60279ff376
kubernetes-client-linux-ppc64le.tar.gz e6ea574272cefe9fd6e8eea2bddd89e1d67d0cb560089813e7429f3fb6d98be0c6601f33c8a0b2364d3becfb93c0904c171096ed6cafc4071e08851566d70d82
kubernetes-client-linux-s390x.tar.gz b67dd572d84382e3f713d56bfb371de379807dca52cc4a1e082d6f4720a12770354ef2c9eac93bfc73bc0ea5f4be293db3b6c03328b94a797c2da17b9c40d9f3
kubernetes-client-windows-386.tar.gz 0cf4b665f46e36616452916d744367b0ae2238098705b32de79559d06ea551173ab95190a26e87bebc03e67a75dc6a65699be3ef3db12aef82f32b66fd5afb0e
kubernetes-client-windows-amd64.tar.gz 69cbe2b3942ba7d9c66e99f819adca94a9c7b420ad72cfd74407954c23ad70a4e7e76296824c4899f88232cabffe08d364c96af83bdaa538f29fa1303bcda2fa
kubernetes-client-windows-arm64.tar.gz 44b0d1a7904bc2bf754abecb9b43a9efdc7cf700ab18f2564d95d98b4e38fe6d91f066943db7105baea964f86d77ade3b1acd57c7aaf1cdf689660f0d4422960

Server Binaries

filename sha512 hash
kubernetes-server-linux-amd64.tar.gz 651a8bf34acb6d61c39cc67ae23d9ef18204f95b309561d31f49da26c0c6a1b7585e7d7c2ac2f1522b2c326470a4e1ec9aa0dcf3bb1f66e1a41e6a2286e0aa5f
kubernetes-server-linux-arm64.tar.gz 7f1f58b05c923d860f2daa6d31906faf834584b1560f4eda01ba5499338d07a7f183030ab625557b1f5df50a5f0ea30d97d487e2571c85260e5b88fc3519cd43
kubernetes-server-linux-ppc64le.tar.gz 3ca2af4a7d68c0d84ef65e69190daeb2392946c87c6b8e84ff8d5cf917c979f0778fc00040d4b471e71b8474ca57ac8fdf786f006260d4403b53f59a203a48f1
kubernetes-server-linux-s390x.tar.gz dfa172456f98210e614a9a538b9027ba211cc19f6eec22a42d5e89ce12d7f5e7e58dfd3229bb974ecba31ffafdf1a5361aef18b9610a45614a181918d87500db

Node Binaries

filename sha512 hash
kubernetes-node-linux-amd64.tar.gz 8057197e9354e2e0f48aab18c0ce87e4ea39c1682cfd4c491c2bc83f8881787b09cb0c9b9f4d7bef8fbe53cc4056f5381745dbfde7f7474bb76a2358b8b3953e
kubernetes-node-linux-arm64.tar.gz 70d086c71f6258b1667bcb1efe60c15810b5b76848fdf26781c5a90efb8a78030e9ffb230bb0fd52d994f02b13c0b558c8e8ad3a42b601a0f9440a71cf91be2d
kubernetes-node-linux-ppc64le.tar.gz 2740f6ac0dfeebbe4ba8804b43ec5968997d9137de9a9432861c3e71e614cb84b309da31bde3554f896f829a570c21b833f0af241659ad326fa753a80f185ec4
kubernetes-node-linux-s390x.tar.gz 9877d5a6cc84569efe30256ba5e8095f38bfa0b11c28892499a12b577b467b516880a33022d88f65263c7ffa2a9a3687ef52cb85fa611e95b14ae0c5b7a79c5c
kubernetes-node-windows-amd64.tar.gz 66b264de5e810bff31c4cf7cc575c3c57fed491fa4e21de7035dad76127e17d5fc88aff9f65277adf0826b255bf9b983f61c91bff2f8386d950f87509db6ec6b

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:v1.29.0 amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-apiserver:v1.29.0 amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-controller-manager:v1.29.0 amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-proxy:v1.29.0 amd64, arm64, ppc64le, s390x
registry.k8s.io/kube-scheduler:v1.29.0 amd64, arm64, ppc64le, s390x
registry.k8s.io/kubectl:v1.29.0 amd64, arm64, ppc64le, s390x

Changelog since v1.28.0

Urgent Upgrade Notes

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

  • Stopped accepting component configuration for kube-proxy and kubelet during kubeadm upgrade plan --config. This was a legacy behavior that was not well supported for upgrades and could be used only at the plan stage to determine if the configuration for these components stored in the cluster needs manual version migration. In the future, kubeadm will attempt alternative component config migration approaches. (#120788, @chendave) [sig/cluster-lifecycle]
  • kubeadm: a separate "super-admin.conf" file is now deployed. The User in admin.conf is now bound to a new RBAC Group kubeadm:cluster-admins that has cluster-admin ClusterRole access. The User in super-admin.conf is now bound to the system:masters built-in super-powers / break-glass Group that can bypass RBAC. Before this change, the default admin.conf was bound to system:masters Group, which was undesired. Executing kubeadm init phase kubeconfig all or just kubeadm init will now generate the new super-admin.conf file. The cluster admin can then decide to keep the file present on a node host or move it to a safe location. kubadm certs renew will renew the certificate in super-admin.conf to one year if the file exists; if it does not exist a "MISSING" note will be printed. kubeadm upgrade apply for this release will migrate this particular node to the two file setup. Subsequent kubeadm releases will continue to optionally renew the certificate in super-admin.conf if the file exists on disk and if renew on upgrade is not disabled. kubeadm join --control-plane will now generate only an admin.conf file that has the less privileged User. (#121305, @neolit123) [sig/cluster-lifecycle]

Changes by Kind

Deprecation

  • Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

([#119495](kubernetes/kubernetes#119495), [@bzsuni](https://github.com/bzsuni)) [SIG API Machinery] [sig/api-machinery]

API Change

  • 'kube-apiserver: adds --authentication-config flag for reading AuthenticationConfiguration files. --authentication-config flag is mutually exclusive with the existing --oidc-* flags.' (#119142, @aramase) [sig/api-machinery,sig/auth,sig/testing]
  • 'kube-scheduler component config (KubeSchedulerConfiguration) kubescheduler.config.k8s.io/v1beta3 is removed in v1.29. Migrated kube-scheduler configuration files to kubescheduler.config.k8s.io/v1.' (#119994, @SataQiu) [sig/scheduling,sig/testing]
  • A new sleep action for the PreStop lifecycle hook was added, allowing containers to pause for a specified duration before termination. (#119026, @AxeZhan) [sig/node,sig/api-machinery,sig/apps,sig/testing]
  • Added CEL expressions to v1alpha1 AuthenticationConfiguration. (#121078, @aramase) [sig/api-machinery,sig/auth,sig/testing]
  • Added Windows support for InPlace Pod Vertical Scaling feature. (#112599, @fabi200123) [SIG Autoscaling, Node, Scalability, Scheduling and Windows] [sig/scalability,sig/scheduling,sig/node,sig/autoscaling,sig/windows]
  • Added ImageMaximumGCAge field to Kubelet configuration, which allows a user to set the maximum age an image is unused before it's garbage collected. (#121275, @haircommander) [sig/node,sig/api-machinery]
  • Added UserNamespacesPodSecurityStandards feature gate to enable user namespace support for Pod Security Standards. Enabling this feature will modify all Pod Security Standard rules to allow setting: spec[.*].securityContext.[runAsNonRoot,runAsUser]. This feature gate should only be enabled if all nodes in the cluster support the user namespace feature and have it enabled. The feature gate will not graduate or be enabled by default in future Kubernetes releases. (#118760, @saschagrunert) [SIG API Machinery, Auth, Node and Release] [sig/node,sig/api-machinery,sig/auth,sig/release]
  • Added optionalOldSelf to x-kubernetes-validations to support ratcheting CRD schema constraints. (#121034, @alexzielenski) [sig/api-machinery]
  • Added a new ServiceCIDR type that allows to dynamically configure the cluster range used to allocate Service ClusterIPs addresses. (#116516, @aojea) [sig/network,sig/api-machinery,sig/auth,sig/apps,sig/cli,sig/testing]
  • Added a new ipMode field to the .status of Services where type is set to LoadBalancer. The new field is behind the LoadBalancerIPMode feature gate. (#119937, @RyanAoh) [SIG API Machinery, Apps, Cloud Provider, Network and Testing] [sig/network,sig/api-machinery,sig/apps,sig/testing,sig/cloud-provider]
  • Added options for configuring nf_conntrack_udp_timeout, and nf_conntrack_udp_timeout_stream variables of netfilter conntrack subsystem. (#120808, @aroradaman) [sig/network,sig/api-machinery]
  • Added support for CEL expressions to v1alpha1 AuthorizationConfiguration webhook matchConditions. (#121223, @ritazh) [sig/api-machinery,sig/auth]
  • Added support for projecting certificates.k8s.io/v1alpha1 ClusterTrustBundle objects into pods. (#113374, @ahmedtd) [sig/storage,sig/node,sig/api-machinery,sig/auth,sig/apps,sig/testing]
  • Added the DisableNodeKubeProxyVersion feature gate. If DisableNodeKubeProxyVersion is enabled, the kubeProxyVersion field is not set. (#120954, @HirazawaUi) [sig/node,sig/api-machinery,sig/apps]
  • Fixed a bug where CEL expressions in CRD validation rules would incorrectly compute a high estimated cost for functions that return strings, lists or maps. The incorrect cost was evident when the result of a function was used in subsequent operations. (#119800, @jpbetz) [SIG API Machinery, Auth and Cloud Provider] [sig/api-machinery,sig/auth,sig/cloud-provider]
  • Fixed the API comments for the Job Ready field in status. (#121765, @mimowo) [sig/api-machinery,sig/apps]
  • Fixed the API comments for the FailIndex Job pod failure policy action. (#121764, @mimowo) [sig/api-machinery,sig/apps]
  • Go API: the ResourceRequirements struct was replaced with VolumeResourceRequirements for use with volumes. (#118653, @pohly) [sig/scheduling,sig/storage,sig/node,sig/api-machinery,sig/auth,sig/apps,sig/testing]
  • Graduated Job BackoffLimitPerIndex feature to beta. (#121356, @mimowo) [sig/apps]
  • Marked the onPodConditions field as optional in Job's pod failure policy. (#120204, @mimowo) [sig/api-machinery,sig/apps]
  • Promoted PodReadyToStartContainers condition to beta. (#119659, @kannon92) [sig/node,sig/testing]
  • The flowcontrol.apiserver.k8s.io/v1beta3 FlowSchema and PriorityLevelConfiguration APIs has been promoted to flowcontrol.apiserver.k8s.io/v1, with the following changes:
  • PriorityLevelConfiguration: the .spec.limited.nominalConcurrencyShares field defaults to 30 only if the field is omitted (v1beta3 also defaulted an explicit 0 value to 30). Specifying an explicit 0 value is not allowed in the v1 version in v1.29 to ensure compatibility with v1.28 API servers. In v1.30, explicit 0 values will be allowed in this field in the v1 API. The flowcontrol.apiserver.k8s.io/v1beta3 APIs are deprecated and will no longer be served in v1.32. All existing objects are available via the v1 APIs. Transition clients and manifests to use the v1 APIs before upgrading to v1.32. (#121089, @tkashem) [sig/api-machinery,sig/testing]
  • The kube-proxy command-line documentation was updated to clarify that --bind-address does not actually have anything to do with binding to an address, and you probably don't actually want to be using it. (#120274, @danwinship) [sig/network]
  • The kube-scheduler selectorSpread plugin has been removed, please use the podTopologySpread plugin instead. (#117720, @kerthcet) [sig/scheduling]
  • The matchLabelKeys/mismatchLabelKeys feature is introduced to the hard/soft PodAffinity/PodAntiAffinity. (#116065, @sanposhiho) [sig/scheduling,sig/api-machinery,sig/apps,sig/testing,sig/cloud-provider]
  • When updating a CRD, per-expression cost limit check are now skipped for x-kubernetes-validations rules of versions that are not mutated. (#121460, @jiahuif) [sig/api-machinery]
  • CSINodeExpandSecret feature has been promoted to GA in this release and is enabled by default. The CSI drivers can make use of the secretRef values passed in NodeExpansion request optionally sent by the CSI Client from this release onwards. (#121303, @humblec) [sig/storage,sig/api-machinery,sig/apps]
  • NodeStageVolume calls will now be retried if the CSI node driver is not running. (#120330, @rohitssingh) [sig/storage,sig/apps,sig/testing]
  • PersistentVolumeLastPhaseTransitionTime is now beta and enabled by default. (#120627, @RomanBednar) [sig/storage]
  • ValidatingAdmissionPolicy type checking now supports CRDs and API extensions types. (#119109, @jiahuif) [sig/api-machinery,sig/auth,sig/apps,sig/testing]
  • kube-apiserver: added --authorization-config flag for reading a configuration file containing an apiserver.config.k8s.io/v1alpha1 AuthorizationConfiguration object. The --authorization-config flag is mutually exclusive with --authorization-modes and --authorization-webhook-* flags. The alpha StructuredAuthorizationConfiguration feature flag must be enabled for --authorization-config to be specified. (#120154, @palnabarun) [sig/api-machinery,sig/auth,sig/testing]
  • kube-proxy now has a new nftables-based mode, available by running

kube-proxy --feature-gates NFTablesProxyMode=true --proxy-mode nftables

This is currently an alpha-level feature and while it probably will not eat your data, it may nibble at it a bit. (It passes e2e testing but has not yet seen real-world use.)

At this point it should be functionally mostly identical to the iptables mode, except that it does not (and will not) support Service NodePorts on 127.0.0.1. (Also note that there are currently no command-line arguments for the nftables-specific config; you will need to use a config file if you want to set the equivalent of any of the --iptables-xxx options.)

As this code is still very new, it has not been heavily optimized yet; while it is expected to eventually have better performance than the iptables backend, very little performance testing has been done so far. (#121046, @danwinship) [sig/network,sig/api-machinery]

  • kube-proxy: Added an option/flag for configuring the nf_conntrack_tcp_be_liberal sysctl (in the kernel's netfilter conntrack subsystem). When enabled, kube-proxy will not install the DROP rule for invalid conntrack states, which currently breaks users of asymmetric routing. (#120354, @aroradaman) [sig/network,sig/api-machinery]

Feature

  • Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

([#119517](kubernetes/kubernetes#119517), [@sanposhiho](https://github.com/sanposhiho)) [SIG Node, Scheduling and Testing] [sig/scheduling,sig/node,sig/testing]
  • 'kubeadm: added validation to verify that the CertificateKey is a valid hex encoded AES key.' (#120064, @SataQiu) [sig/cluster-lifecycle]
  • A customizable OrderedScoreFuncs() function was introduced. Out-of-tree plugins that used the scheduler's preemption interface could implement this function for custom preemption preferences or return nil to keep the current behavior. (#121867, @lianghao208) [sig/scheduling]
  • Added apiextensions_apiserver_update_ratcheting_time metric for tracking time taken during requests by feature CRDValidationRatcheting. (#121462, @alexzielenski) [sig/api-machinery]
  • Added apiserver_envelope_encryption_dek_cache_filled to measure number of records in data encryption key (DEK) cache. (#119878, @ritazh) [sig/api-machinery,sig/auth]
  • Added apiserver_watch_list_duration_seconds metrics which will measure response latency distribution in seconds for watchlist requests broken by group, version, resource and scope. (#120490, @p0lyn0mial) [sig/api-machinery,sig/instrumentation]
  • Added job_pods_creation_total metrics for tracking Pods created by the Job controller labeled by events which triggered the Pod creation. (#121481, @dejanzele) [sig/apps,sig/testing]
  • Added kubectl node drain helper callbacks OnPodDeletionOrEvictionStarted and OnPodDeletionOrEvictionFailed; people extending kubectl can use these new callbacks for more granularity. Deprecated the OnPodDeletedOrEvicted node drain helper callback. (#117502, @adilGhaffarDev) [sig/cli]
  • Added a new --init-only command line flag to kube-proxy. Setting the flag makes kube-proxy perform its initial configuration that requires privileged mode, and then exit. The --init-only mode is intended to be executed in a privileged init container, so that the main container may run with a stricter securityContext. (#120864, @uablrek) [SIG Network and Scalability] [sig/network,sig/scalability]
  • Added a new scheduler metric, pod_scheduling_sli_duration_seconds, and started the deprecation for pod_scheduling_duration_seconds. (#119049, @helayoty) [sig/scheduling,sig/instrumentation,sig/testing]
  • Added a return value to QueueingHint to indicate an error. If QueueingHint returns an error, the scheduler logs it and treats the event as a QueueAfterBackoff so that the Pod won't be stuck in the unschedulable pod pool. (#119290, @carlory) [sig/scheduling,sig/node,sig/testing]
  • Added apiserver identity to the following metrics: apiserver_envelope_encryption_key_id_hash_total, apiserver_envelope_encryption_key_id_hash_last_timestamp_seconds, apiserver_envelope_encryption_key_id_hash_status_last_timestamp_seconds, apiserver_encryption_config_controller_automatic_reload_failures_total, apiserver_encryption_config_controller_automatic_reload_success_total, apiserver_encryption_config_controller_automatic_reload_last_timestamp_seconds.

Fixed bug to surface events for the following metrics: apiserver_encryption_config_controller_automatic_reload_failures_total, apiserver_encryption_config_controller_automatic_reload_last_timestamp_seconds, apiserver_encryption_config_controller_automatic_reload_success_total. (#120438, @ritazh) [sig/api-machinery,sig/auth,sig/instrumentation,sig/testing]

  • Added container filesystem to the ImageFsInfoResponse. (#120914, @kannon92) [sig/node,sig/testing]
  • Added multiplication functionality to Quantity. (#117411, @tenzen-y) [sig/api-machinery]
  • Added new feature gate called RuntimeClassInImageCriApi to address kubelet changes needed for KEP 4216. Noteable changes:
  1. Populate new RuntimeHandler field in CRI's ImageSpec struct during image pulls from container runtimes.
  2. Pass runtimeHandler field in RemoveImage() call to container runtime in kubelet's image garbage collection. (#121456, @kiashok) [sig/node,sig/windows]
  • Added support for split image filesystem in kubelet. (#120616, @kannon92) [sig/node,sig/testing]
  • Bumped cel-go to v0.17.7 and introduced set ext library with new options. (#121577, @cici37) [sig/api-machinery,sig/auth,sig/cloud-provider]
  • Bumped distroless-iptables to 0.3.2 based on Go 1.21.1. (#120527, @cpanato) [sig/testing]
  • Bumped distroless-iptables to 0.3.3 based on Go 1.21.2. (#121073, @cpanato) [sig/testing]
  • Bumped distroless-iptables to 0.4.1 based on Go 1.21.3. (#121216, @cpanato) [sig/testing]
  • Bumped distroless-iptables to 0.4.1 based on Go 1.21.3. (#121871, @cpanato) [sig/testing]
  • CEL can now correctly handle a CRD openAPIV3Schema that has neither Properties nor AdditionalProperties. (#121459, @jiahuif) [sig/api-machinery,sig/testing]
  • CEL cost estimator no longer treats enums as unbounded strings when determining its length. Instead, the length is set to the longest possible enum value. (#121085, @jiahuif) [SIG API Machinery] [sig/api-machinery]
  • CRI: image pull per runtime class is now supported. (#121121, @kiashok) [sig/node,sig/windows]
  • Certain requestBody parameters in the OpenAPI v3 are now correctly marked as required. (#120735, @Jefftree) [sig/network,sig/storage,sig/node,sig/api-machinery,sig/cluster-lifecycle,sig/auth,sig/cli,sig/instrumentation,sig/architecture,sig/cloud-provider]
  • Changed kubectl help to display basic details for subcommands from plugins. (#116752, @xvzf) [sig/cli]
  • Changed the KMSv2KDF feature gate to be enabled by default. (#120433, @enj) [SIG API Machinery, Auth and Testing] [sig/api-machinery,sig/auth,sig/testing]
  • Client-side apply will now use OpenAPI v3 by default. (#120707, @Jefftree) [sig/api-machinery,sig/cli]
  • Decoding etcd's response now respects the timeout context. (#121614, @HirazawaUi) [sig/api-machinery]
  • Decoupled TaintManager from NodeLifeCycleController (KEP-3902). (#119208, @atosatto) [sig/scheduling,sig/node,sig/api-machinery,sig/apps,sig/instrumentation,sig/testing]
  • Enabled traces for KMSv2 encrypt/decrypt operations. (#121095, @aramase) [sig/api-machinery,sig/auth,sig/instrumentation,sig/testing,sig/architecture]
  • Fixed kube-proxy panicking on exit when the Node object changed its PodCIDR. (#120375, @pegasas) [sig/network]
  • Fixed bugs in handling of server-side apply, create, and update API requests for objects containing duplicate items in keyed lists.
  • A create or update API request with duplicate items in a keyed list no longer wipes out managedFields. Examples include env var entries with the same name, or port entries with the same containerPort in a pod spec.
  • A server-side apply request that makes unrelated changes to an object which has duplicate items in a keyed list no longer fails, and leaves the existing duplicate items as-is.
  • A server-side apply request that changes an object which has duplicate items in a keyed list, and modifies the duplicated item removes the duplicates and replaces them with the single item contained in the server-side apply request. (#121575, @apelisse) [sig/network,sig/storage,sig/node,sig/api-machinery,sig/cluster-lifecycle,sig/auth,sig/cli,sig/instrumentation,sig/testing,sig/architecture,sig/cloud-provider]
  • Fixed overriding default KubeletConfig fields in drop-in configs if not set. (#121193, @sohankunkerkar) [sig/node,sig/testing]
  • Graduated API List chunking (aka pagination) feature to stable. (#119503, @wojtek-t) [sig/api-machinery,sig/testing,sig/cloud-provider]
  • Graduated the ReadWriteOncePod feature gate to GA. (#121077, @chrishenzie) [sig/scheduling,sig/storage,sig/node,sig/apps,sig/testing]
  • Graduated the following kubelet resource metrics to general availability:
  • container_cpu_usage_seconds_total
  • container_memory_working_set_bytes
  • container_start_time_seconds
  • node_cpu_usage_seconds_total
  • node_memory_working_set_bytes
  • pod_cpu_usage_seconds_total
  • pod_memory_working_set_bytes
  • resource_scrape_error

Deprecated (renamed) scrape_error in favor of resource_scrape_error (#116897, @Richabanker) [SIG Architecture, Instrumentation, Node and Testing] [sig/node,sig/instrumentation,sig/testing,sig/architecture]

  • Implemented API for streaming for the etcd store implementation. When sendInitialEvents ListOption is set together with watch=true, it begins the watch stream with synthetic init events followed by a synthetic Bookmark, after which the server continues streaming events. (#119557, @p0lyn0mial) [sig/api-machinery]
  • Improved memory usage of kube-scheduler by dropping the .metadata.managedFields field that kube-scheduler doesn't require. (#119556, @linxiulei) [sig/scheduling]
  • In a scheduler with Permit plugins, when a Pod is rejected during WaitOnPermit, the scheduler records the plugin. The scheduler will use the record to honor cluster events and queueing hints registered for the plugin, to inform whether to retry the pod. (#119785, @sanposhiho) [sig/scheduling,sig/testing]
  • In-tree cloud providers are now switched off by default. Please use DisableCloudProviders and DisableKubeletCloudCredentialProvider feature flags if you still need this functionality. (#117503, @dims) [sig/api-machinery,sig/testing,sig/cloud-provider]
  • Introduced new apiserver metric apiserver_flowcontrol_current_inqueue_seats. This metric is analogous to apiserver_flowcontrol_current_inqueue_requests, but tracks the total number of seats, as each request can take more than one seat. (#119385, @andrewsykim) [sig/api-machinery]
  • Introduced the job_finished_indexes_total metric for the BackoffLimitPerIndex feature. (#121292, @mimowo) [sig/apps,sig/testing]
  • Kubeadm: supported updating certificate organization during kubeadm certs renew operation. (#121841, @SataQiu) [sig/cluster-lifecycle]
  • Kubernetes is now built with Go 1.21.0. (#118996, @cpanato) [sig/testing,sig/release]
  • Kubernetes is now built with Go 1.21.1. (#120493, @cpanato) [sig/testing,sig/release]
  • Kubernetes is now built with Go 1.21.2. (#121021, @cpanato) [sig/testing,sig/release]
  • Kubernetes is now built with Go 1.21.4. (#121808, @cpanato) [sig/network,sig/storage,sig/node,sig/api-machinery,sig/cluster-lifecycle,sig/auth,sig/cli,sig/instrumentation,sig/testing,sig/release,sig/architecture,sig/cloud-provider]
  • Kubernetes is now built with Go v1.21.3. (#121149, @cpanato) [sig/testing,sig/release]
  • List of metric labels can now be configured by supplying a manifest using the --allow-metric-labels-manifest flag. (#118299, @rexagod) [sig/instrumentation,sig/architecture]
  • Listed the pods using <PVC> as an ephemeral storage volume in "Used by:" part of the output of kubectl describe pvc <PVC> command. (#120427, @MaGaroo) [sig/cli]
  • Migrated the nodevolumelimits scheduler plugin to use contextual logging. (#116884, @mengjiao-liu) [sig/scheduling,sig/storage,sig/node,sig/instrumentation,sig/testing]
  • Migrated the volumebinding scheduler plugins to use contextual logging. (#116803, @mengjiao-liu) [sig/scheduling,sig/storage,sig/instrumentation]
  • Priority and Fairness feature is now stable, the feature gate will be removed in v1.31. (#121638, @tkashem) [sig/api-machinery,sig/testing]
  • Promoted PodHostIPs condition to beta. (#120257, @wzshiming) [sig/network,sig/node,sig/testing]
  • Promoted PodHostIPs condition to beta. (#121477, @wzshiming) [sig/network,sig/testing]
  • Promoted PodReplacementPolicy to beta. (#121491, @dejanzele) [sig/apps,sig/testing]
  • Promoted ServiceNodePortStaticSubrange to stable and lock to default. (#120233, @xuzhenglun) [sig/network]
  • Promoted plugin subcommand resolution feature to beta. (#120663, @ardaguclu) [sig/cli,sig/testing]
  • Removed /livez livezchecks for KMS v1 and v2 to ensure KMS health does not cause kube-apiserver restart. KMS health checks are still in place as a healthz and readiness checks. (#120583, @ritazh) [sig/api-machinery,sig/auth,sig/testing]
  • Restartable init containers resource in pod autoscaler are now calculated. (#120001, @qingwave) [sig/autoscaling,sig/apps]
  • Sidecar termination is now serialized and each sidecar container will receive a SIGTERM after all main containers and later starting sidecar containers have terminated. (#120620, @tzneal) [sig/node,sig/testing]
  • The CRD validation rule with feature gate CustomResourceValidationExpressions was promoted to GA. (#121373, @cici37) [sig/api-machinery,sig/testing]
  • The KMSv2 features with feature gates KMSv2 and KMSv2KDF are promoted to GA. The KMSv1 feature gate is now disabled by default. (#121485, @ritazh) [sig/api-machinery,sig/auth,sig/testing]
  • The --interactive flag in kubectl delete is now visible to all users by default. (#120416, @ardaguclu) [sig/cli,sig/testing]
  • The CloudDualStackNodeIPs feature is now beta, meaning that when using an external cloud provider that has been updated to support the feature, you can pass comma-separated dual-stack --node-ips to kubelet and have the cloud provider take both IPs into account. (#120275, @danwinship) [sig/network,sig/api-machinery,sig/cloud-provider]
  • The Dockerfile for the kubectl image has been updated with the addition of a specific base image and essential utilities (bash and jq). (#119592, @rayandas) [sig/node,sig/cli,sig/testing,sig/release]
  • The SidecarContainers feature has graduated to beta and is enabled by default. (#121579, @gjkim42) [sig/node]
  • The kube-apiserver will now expose four new metrics to inform about errors on the clusterIP and nodePort allocation logic. (#120843, @aojea) [sig/network,sig/instrumentation]
  • The volume_zone plugin will consider beta labels as GA labels during the scheduling process. Therefore, if the values of the labels are the same, PVs with beta labels can also be scheduled to nodes with GA labels. (#118923, @AxeZhan) [sig/scheduling]
  • Updated the generic apiserver library to produce an error if a new API server is configured with support for a data format other than JSON, YAML, or Protobuf. (#121325, @benluddy) [SIG API Machinery] [sig/api-machinery]
  • Use of secret-based service account tokens now adds an authentication.k8s.io/legacy-token-autogenerated-secret or authentication.k8s.io/legacy-token-manual-secret audit annotation containing the name of the secret used. (#118598, @yuanchen8911) [SIG Auth, Instrumentation and Testing] [sig/auth,sig/instrumentation,sig/testing]
  • --sync-frequency will not affect the update interval of volumes that use ConfigMaps or Secrets when the configMapAndSecretChangeDetectionStrategy is set to Cache. The update interval is only affected by node.alpha.kubernetes.io/ttl node annotation." (#120255, @likakuli) [sig/node]
  • CRDValidationRatcheting: added support for ratcheting x-kubernetes-validations in schema. (#121016, @alexzielenski) [sig/api-machinery]
  • DevicePluginCDIDevices feature has been graduated to beta and enabled by default in the kubelet. (#121254, @bart0sh) [sig/node]
  • ValidatingAdmissionPolicy now preserves types of composition variables, and raises type-related errors early. (#121001, @jiahuif) [sig/api-machinery,sig/testing]
  • cluster/gce: added webhook to replace PersistentVolumeLabel admission controller. (#121628, @andrewsykim) [sig/cloud-provider]
  • dra: the scheduler plugin now avoids additional scheduling attempts in some cases by falling back to SSA after a conflict. (#120534, @pohly) [sig/scheduling,sig/node,sig/testing]
  • etcd: image is now based on v3.5.9. (#121567, @mzaian) [sig/api-machinery]
  • kube-apiserver added:
  • alpha support (guarded by the ServiceAccountTokenJTI feature gate) for adding a jti (JWT ID) claim to service account tokens it issues, adding an authentication.kubernetes.io/credential-id audit annotation in audit logs when the tokens are issued, and authentication.kubernetes.io/credential-id entry in the extra user info when the token is used to authenticate.
  • alpha support (guarded by the ServiceAccountTokenPodNodeInfo feature gate) for including the node name (and uid, if the node exists) as additional claims in service account tokens it issues which are bound to pods, and authentication.kubernetes.io/node-name and authentication.kubernetes.io/node-uid extra user info when the token is used to authenticate.
  • alpha support (guarded by the ServiceAccountTokenNodeBinding feature gate) for allowing TokenRequests that bind tokens directly to nodes, and (guarded by the ServiceAccountTokenNodeBindingValidation feature gate) for validating the node name and uid still exist when the token is used. (#120780, @munnerz) [sig/api-machinery,sig/auth,sig/apps,sig/cli,sig/testing]
  • kube-controller-manager: The LegacyServiceAccountTokenCleanUp feature gate is now beta and enabled by default. When enabled, legacy auto-generated service account token secrets are auto-labeled with a kubernetes.io/legacy-token-invalid-since label if the credentials have not been used in the time specified by --legacy-service-account-token-clean-up-period (defaulting to one year), and are referenced from the .secrets list of a ServiceAccount object, and are not referenced from pods. This label causes the authentication layer to reject use of the credentials. After being labeled as invalid, if the time specified by --legacy-service-account-token-clean-up-period (defaulting to one year) passes without the credential being used, the secret is automatically deleted. Secrets labeled as invalid which have not been auto-deleted yet can be re-activated by removing the kubernetes.io/legacy-token-invalid-since label. (#120682, @yt2985) [sig/auth,sig/apps,sig/testing]
  • kube-proxy will only install the DROP rules for invalid conntrack states if the nf_conntrack_tcp_be_liberal is not set. (#120412, @aojea) [sig/network]
  • kube-scheduler implemented scheduling hints for the NodeUnschedulable plugin. The scheduling hints allow the scheduler to only retry scheduling a Pod that was previously rejected by the NodeSchedulable plugin if a new Node or a Node update sets .spec.unschedulable to false. (#119396, @wackxu) [sig/scheduling]
  • kube-scheduler implements scheduling hints for the NodeAffinity plugin. The scheduling hints allow the scheduler to only retry scheduling a Pod that was previously rejected by the NodeAffinity plugin if a new Node or a Node update matches the Pod's node affinity. (#119155, @carlory) [sig/scheduling]
  • kubeadm: promoted feature gate EtcdLearnerMode to beta. Learner mode for joining etcd members is now enabled by default. (#120228, @pacoxu) [sig/cluster-lifecycle]
  • kubeadm: turned on feature gate MergeCLIArgumentsWithConfig to merge the config from flag and config file, otherwise, if the flag --ignore-preflight-errors is set from the CLI, then the value from config file will be ignored. (#119946, @chendave) [sig/cluster-lifecycle]
  • kubeadm: will now allow deploying a kubelet that is 3 versions older than the version of kubeadm (N-3). This aligns with the recent change made by SIG Architecture that extends the support skew between the control plane and kubelets. Tolerate this new kubelet skew for the commands init, join and upgrade. Note that if the kubeadm user applies a control plane version that is older than the kubeadm version (N-1 maximum) then the skew between the kubelet and control plane would become a maximum of N-2. (#120825, @pacoxu) [sig/cluster-lifecycle]
  • kubelet , when using --cloud-provider=external, will now initialize the node addresses with the value of --node-ip , if it exists, or waits for the cloud provider to assign the addresses. (#121028, @aojea) [sig/node,sig/cloud-provider]
  • kubelet allows pods to use the net.ipv4.tcp_fin_timeout, “net.ipv4.tcp_keepalive_intvl” and “net.ipv4.tcp_keepalive_probes“ sysctl by default; Pod Security Admission allows this sysctl in v1.29+ versions of the baseline and restricted policies. (#121240, @HirazawaUi) [sig/node,sig/auth]
  • kubelet now allows pods to use the net.ipv4.tcp_keepalive_time sysctl by default and the minimal kernel version is 4.5; Pod Security Admission allows this sysctl in v1.29+ versions of the baseline and restricted policies. (#118846, @cyclinder) [sig/network,sig/node,sig/auth]
  • kubelet now emits a metric for end-to-end pod startup latency, including image pull. (#121041, @ruiwen-zhao) [sig/node]
  • kubelet now exposes latency metrics of different stages of the node startup. (#118568, @qiutongs) [sig/scalability,sig/node,sig/instrumentation]

Documentation

  • Added descriptions and examples for the situation of using kubectl rollout restart without specifying a particular deployment. (#120118, @Ithrael) [sig/cli]
  • When the kubelet fails to assign CPUs to a Pod because there less available CPUs than the Pod requests, the error message changed from not enough cpus available to satisfy request to not enough cpus available to satisfy request: <num_requested> requested, only <num_available> available. (#121059, @matte21) [sig/node]

Failing Test

  • Added mock framework support for unit tests for Windows in kubeproxy. (#120105, @princepereira) [sig/network,sig/windows]
  • DRA: when the scheduler had to deallocate a claim after a node became unsuitable for a pod, it might have needed more attempts than really necessary. This was fixed by first disabling allocations. (#120428, @pohly) [sig/scheduling,sig/node]
  • E2e framework: retrying after intermittent apiserver failures was fixed in WaitForPodsResponding (#120559, @pohly) [sig/testing]
  • KCM specific args can be passed with /cluster script, without affecting CCM. New variable name: KUBE_CONTROLLER_MANAGER_TEST_ARGS. (#120524, @jprzychodzen) [SIG Cloud Provider] [sig/cloud-provider]
  • k8s.io/dynamic-resource-allocation: DRA drivers updating to this release are compatible with Kubernetes v1.27 and v1.28. (#120868, @pohly) [sig/node]

Bug or Regression

  • 'kubeadm: printing the default component configs for reset and join is now unsupported.' (#119346, @chendave) [sig/cluster-lifecycle]
  • 'kubeadm: removed system:masters organization from etcd/healthcheck-client certificate.' (#119859, @SataQiu) [sig/cluster-lifecycle]
  • Added CAP_NET_RAW to netadmin debug profile and removed privileges when debugging nodes. (#118647, @mochizuki875) [sig/cli,sig/testing]
  • Added a check on a user attempting to create a static pod via the kubelet without specifying a name. They will now get a visible validation error. (#119522, @YTGhost) [sig/node]
  • Added a redundant process to remove tracking finalizers from Pods that belong to Jobs. The process kicks in after the control plane marks a Job as finished. (#119944, @Sharpz7) [sig/apps]
  • Added more accurate requeueing in scheduling queue for Pods rejected by the temporal failure (e.g., temporal failure on kube-apiserver). (#119105, @sanposhiho) [sig/scheduling,sig/testing]
  • Allowed specifying ExternalTrafficPolicy for Services with ExternalIPs. (#119150, @tnqn) [sig/network,sig/api-machinery,sig/apps,sig/cli,sig/testing,sig/release,sig/cloud-provider]
  • Changed kubelet logs from error to info for uncached partitions when using CRI stats provider. (#100448, @saschagrunert) [sig/node]
  • Empty values are no longer assigned to undefined resources (CPU or memory) when storing the resources allocated to the pod in checkpoint. (#117615, @aheng-ch) [sig/node]
  • Fixed CEL estimated cost of replace() to handle a zero length replacement string correctly. Previously this would cause the estimated cost to be higher than it should be. (#120097, @jpbetz) [SIG API Machinery] [sig/api-machinery]
  • Fixed OpenAPI v3 not being cleaned up after deleting APIServices. (#120108, @tnqn) [sig/api-machinery,sig/testing]
  • Fixed 121094 by re-introducing the readiness predicate for externalTrafficPolicy: Local services. (#121116, @alexanderConstantinescu) [sig/network,sig/cloud-provider]
  • Fixed kubectl events not filtering events by GroupVersion for resources with a full name. (#120119, @Ithrael) [sig/cli,sig/testing]
  • Fixed systemLogQuery service name matching. (#120678, @rothgar) [sig/node]
  • Fixed a 1.27 scheduling regression that PostFilter plugin may not function if previous PreFilter plugins return Skip. (#119769, @Huang-Wei) [sig/scheduling,sig/testing]
  • Fixed a v1.26 regression scheduling bug by ensuring that preemption is skipped when a PreFilter plugin returns UnschedulableAndUnresolvable. (#119778, @sanposhiho) [sig/scheduling,sig/testing]
  • Fixed a v1.28.0 regression where kube-controller-manager can crash when StatefulSet with Parallel policy and PVC labels are scaled up. (#121142, @aleksandra-malinowska) [sig/apps]
  • Fixed a v1.28 regression around restarting init containers in the right order relative to normal containers. (#120281, @gjkim42) [sig/node,sig/testing]
  • Fixed a v1.28 regression handling negative index json patches. (#120327, @liggitt) [sig/network,sig/storage,sig/node,sig/api-machinery,sig/cluster-lifecycle,sig/auth,sig/cli,sig/instrumentation,sig/architecture,sig/cloud-provider]
  • Fixed a v1.28 regression in scheduler: a pod with concurrent events could incorrectly get moved to the unschedulable queue where it could get stuck until the next periodic purging after 5 minutes, if there was no other event for it. (#120413, @pohly) [sig/scheduling]
  • Fixed a bug around restarting init containers in the right order relative to normal containers with SidecarContainers feature enabled. (#120269, @gjkim42) [sig/node,sig/testing]
  • Fixed a bug in the cronjob controller where already created jobs might be missing from the status. (#120649, @andrewsykim) [sig/apps]
  • Fixed a bug where Services using finalizers may hold onto ClusterIP and/or NodePort allocated resources for longer than expected if the finalizer is removed using the status subresource. (#120623, @aojea) [sig/network,sig/testing]
  • Fixed a bug where an API group's path was not unregistered from the API server's root paths when the group was deleted. (#121283, @tnqn) [SIG API Machinery and Testing] [sig/api-machinery,sig/testing]
  • Fixed a bug where containers would not start on cgroupv2 systems where swap is disabled. (#120784, @elezar) [sig/node]
  • Fixed a bug where the CPU set allocated to an init container, with containerRestartPolicy of Always, were erroneously reused by a regular container. (#119447, @gjkim42) [SIG Node and Testing] [sig/node,sig/testing]
  • Fixed a bug where the device resources allocated to an init container, with containerRestartPolicy of Always, were erroneously reused by a regular container. (#120461, @gjkim42) [sig/node,sig/testing]
  • Fixed a bug where the memory resources allocated to an init container, with containerRestartPolicy of Always, were erroneously reused by a regular container. (#120715, @gjkim42) [SIG Node] [sig/node]
  • Fixed a concurrent map access in TopologyCache's HasPopulatedHints method. (#118189, @Miciah) [sig/network,sig/apps]
  • Fixed a regression (CLIENTSET_PKG: unbound variable) when invoking deprecated generate-groups.sh script. (#120877, @soltysh) [sig/api-machinery]
  • Fixed a regression in kube-proxy where it might refuse to start if given single-stack IPv6 configuration options on a node that has both IPv4 and IPv6 IPs. (#121008, @danwinship) [sig/network]
  • Fixed a regression in default configurations, which enabled PodDisruptionConditions by default, that prevented the control plane's pod garbage collector from deleting pods that contained duplicated field keys (environmental variables with repeated keys or container ports). (#121103, @mimowo) [sig/scheduling,sig/node,sig/auth,sig/apps,sig/testing]
  • Fixed a regression in the default v1.27 configurations in kube-apiserver: fixed the AggregatedDiscoveryEndpoint feature (beta in v1.27+) to successfully fetch discovery information from aggregated API servers that do not check Accept headers when serving the /apis endpoint. (#119870, @Jefftree) [sig/api-machinery]
  • Fixed a regression in the kubelet's behavior while creating a container when the EventedPLEG feature gate is enabled. (#120942, @sairameshv) [sig/node]
  • Fixed a regression since v1.27.0 in the scheduler framework when running score plugins. The skippedScorePlugins number might be greater than enabledScorePlugins, so when initializing a slice the cap(len(skippedScorePlugins) - len(enabledScorePlugins)) is negative, which is not allowed. (#121632, @kerthcet) [sig/scheduling]
  • Fixed a situation when, sometimes, the scheduler incorrectly placed a pod in the unschedulable queue instead of the backoff queue. This happened when some plugin previously declared the pod as unschedulable and then in a later attempt encounters some other error. Scheduling of that pod then got delayed by up to five minutes, after which periodic flushing moved the pod back into the active queue. (#120334, @pohly) [sig/scheduling]
  • Fixed an issue related to not draining all the pods in a namespace when an empty selector, i.e., "{}," is specified in a Pod Disruption Budget (PDB). (#119732, @sairameshv) [sig/apps]
  • Fixed an issue where StatefulSet might not restart a pod after eviction or node failure. (#120398, @aleksandra-malinowska) [sig/apps]
  • Fixed an issue where a CronJob could fail to clean up Jobs when the ResourceQuota for Jobs had been reached. (#119776, @ASverdlov) [sig/apps]
  • Fixed an issue where a StatefulSet might not restart a pod after eviction or node failure. (#121389, @aleksandra-malinowska) [sig/apps,sig/testing]
  • Fixed an issue with the garbagecollection controller registering duplicate event handlers if discovery requests failed. (#117992, @liggitt) [sig/api-machinery,sig/apps]
  • Fixed attaching volumes after detach errors. Now volumes that failed to detach are not treated as attached. Kubernetes will make sure they are fully attached before they can be used by pods. (#120595, @jsafrane) [sig/storage,sig/apps]
  • Fixed bug that kubelet resource metric container_start_time_seconds had timestamp equal to container start time. (#120518, @saschagrunert) [SIG Instrumentation, Node and Testing] [sig/node,sig/instrumentation,sig/testing]
  • Fixed inconsistency in the calculation of number of nodes that have an image, which affect the scoring in the ImageLocality plugin. (#116938, @olderTaoist) [sig/scheduling]
  • Fixed issue with incremental id generation for loadbalancer and endpoint in kubeproxy mock test framework. (#120723, @princepereira) [sig/network,sig/windows]
  • Fixed panic in Job controller when podRecreationPolicy: Failed is used, and the number of terminating pods exceeds parallelism. (#121147, @kannon92) [sig/apps]
  • Fixed regression with adding aggregated APIservices panicking and affected health check introduced in release v1.28.0. (#120814, @Jefftree) [sig/api-machinery,sig/testing]
  • Fixed some invalid and unimportant log calls. (#121249, @pohly) [SIG Cloud Provider, Cluster Lifecycle and Testing] [sig/cluster-lifecycle,sig/testing,sig/cloud-provider]
  • Fixed stale SMB mount issue when SMB file share is deleted and then unmounted. (#121851, @andyzhangx) [sig/storage]
  • Fixed the bug where images that were pinned by the container runtime could be garbage collected by kubelet. (#119986, @ruiwen-zhao) [sig/node]
  • Fixed the bug where kubelet couldn't output logs after log file rotated when kubectl logs POD_NAME -f is running. (#115702, @xyz-li) [sig/node]
  • Fixed the calculation of the requeue time in the cronjob controller, resulting in proper handling of failed/stuck jobs. (#121327, @soltysh) [sig/apps]
  • Fixed the issue where pod with ordinal number lower than the rolling partitioning number was being deleted. It was coming up with updated image. (#120731, @adilGhaffarDev) [sig/apps,sig/testing]
  • Fixed tracking of terminating Pods in the Job status. The field was not updated unless there were other changes to apply. (#121342, @dejanzele) [sig/apps,sig/testing]
  • Forbidden sysctls for pod sharing the respective namespaces with the host are now checked when creating or updating pods without such sysctls. (#118705, @pacoxu) [sig/node,sig/apps]
  • If a watch with the progressNotify option set is to be created, and the registry hasn't provided a newFunc, return an error. (#120212, @p0lyn0mial) [SIG API Machinery] [sig/api-machinery]
  • Improved handling of jsonpath expressions for kubectl wait --for. It is now possible to use simple filter expressions which match on a field's content. (#118748, @andreaskaris) [sig/cli,sig/testing]
  • In the wait.PollUntilContextTimeout function, if immediate is true, the condition will now be invoked before waiting, guaranteeing that the condition is invoked at least once and then wait a interval before executing again. (#119762, @AxeZhan) [sig/api-machinery]
  • Incorporating feedback on PR #119341 (#120087, @divyasri537) [SIG API Machinery] [sig/api-machinery,sig/api-machinery]
  • KCCM: fixed transient node addition and removal caused by #121090 while syncing load balancers on large clusters with a lot of churn. (#121091, @alexanderConstantinescu) [sig/network,sig/network,sig/testing,sig/cloud-provider]
  • Kubeadm: changed the "system:masters" Group in the apiserver-kubelet-client.crt certificate Subject to be "kubeadm:cluster-admins" which is a less privileged Group. (#121837, @neolit123) [sig/cluster-lifecycle]
  • Metric buckets for pod_start_duration_seconds were changed to {0.5, 1, 2, 3, 4, 5, 6, 8, 10, 20, 30, 45, 60, 120, 180, 240, 300, 360, 480, 600, 900, 1200, 1800, 2700, 3600}. (#120680, @ruiwen-zhao) [sig/node,sig/instrumentation]
  • Mitigated http/2 DOS vulnerabilities for CVE-2023-44487 and CVE-2023-39325 for the API server when the client is unauthenticated. The mitigation may be disabled by setting the UnauthenticatedHTTP2DOSMitigation feature gate to false (it is enabled by default). An API server fronted by an L7 load balancer that already mitigates these http/2 attacks may choose to disable the kube-apiserver mitigation to avoid disrupting load balancer -> kube-apiserver connections if http/2 requests from multiple clients share the same backend connection. An API server on a private network may opt to disable the kube-apiserver mitigation to prevent performance regressions for unauthenticated clients. Authenticated requests rely on the fix in golang.org/x/net v0.17.0 alone. https://issue.k8s.io/121197 tracks further mitigation of http/2 attacks by authenticated clients. (#121120, @enj) [sig/api-machinery]
  • No-op and GC related updates to cluster trust bundles no longer require attest authorization when the ClusterTrustBundleAttest plugin is enabled. (#120779, @enj) [sig/auth]
  • Registered metric apiserver_request_body_size_bytes to track the size distribution of requests by resource and verb. (#120474, @YaoC) [SIG API Machinery and Instrumentation] [sig/api-machinery,sig/instrumentation]
  • Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met. This eliminates the problem of rolling updates to a DaemonSet getting stuck around tolerations. (#119317, @mochizuki875) [sig/apps,sig/testing]
  • Scheduler: in 1.29 pre-releases, enabling contextual logging slowed down pod scheduling. (#121715, @pohly) [SIG Instrumentation and Scheduling] [sig/scheduling,sig/instrumentation]
  • Service Controller: will now update load balancer hosts after node's ProviderID is updated. (#120492, @cezarygerard) [sig/network,sig/cloud-provider]
  • Setting the status.loadBalancer of a Service whose spec.type is not LoadBalancer was previously allowed, but any update to the metadata or spec would wipe that field. Setting this field is no longer permitted unless spec.type is LoadBalancer. In the very unlikely event that this has unexpected impact, you can enable the AllowServiceLBStatusOnNonLB feature gate, which will restore the previous behavior. If you do need to set this, please file an issue with the Kubernetes project to help contributors understand why you need it. (#119789, @thockin) [sig/apps,sig/testing]
  • The --bind-address parameter in kube-proxy is misleading, no port is opened with this address. Instead it is translated internally to "nodeIP". The nodeIPs for both families are now taken from the Node object if --bind-address is unspecified or set to the "any" address (0.0.0.0 or ::). It is recommended to leave --bind-address unspecified, and in particular avoid to set it to localhost (127.0.0.1 or ::1) (#119525, @uablrek) [SIG Network and Scalability] [sig/network,sig/scalability]
  • Updated kube-openapi to remove invalid defaults: OpenAPI spec no longer includes default of {} for certain fields where it did not make sense. (#120757, @alexzielenski) [sig/network,sig/storage,sig/node,sig/api-machinery,sig/cluster-lifecycle,sig/auth,sig/cli,sig/instrumentation,sig/architecture,sig/cloud-provider]
  • Updated the CRI-O socket path, so users who configure kubelet to use a location like /run/crio/crio.sock don't see strange behaviour from CRI stats provider. (#118704, @dgl) [sig/node]
  • Volume attach or publish operation will not fail at kubelet if target path directory already exists on the node. (#119735, @akankshapanse) [sig/storage]
  • cluster-bootstrap: improved the security of the functions responsible for generation and validation of bootstrap tokens. (#120400, @neolit123) [sig/cluster-lifecycle,sig/security]
  • etcd: updated to v3.5.10. (#121566, @mzaian) [sig/api-machinery,sig/cluster-lifecycle,sig/testing,sig/cloud-provider,sig/etcd]
  • k8s.io/dynamic-resource-allocation/controller: UnsuitableNodes can now handle a mix of allocated and unallocated claims correctly. (#120338, @pohly) [sig/node]
  • k8s.io/dynamic-resource-allocation/controller: ResourceClaimParameters and ResourceClassParameters validation errors are now visible on ResourceClaim, ResourceClass and Pod. (#121065, @byako) [sig/node]
  • k8s.io/dynamic-resource-allocation: can now handle a selected node which isn't listed as potential node. (#120871, @pohly) [sig/node]
  • kube-proxy now reports its health more accurately in dual-stack clusters when there are problems with only one IP family. (#118146, @aroradaman) [sig/network,sig/windows]
  • kubeadm: Fixed the bug where it always did CRI detection when --config was passed, even if it is not required by the subcommand. (#120828, @SataQiu) [sig/cluster-lifecycle]
  • kubeadm: fixed nil pointer when etcd member is already removed. (#119753, @pacoxu) [sig/cluster-lifecycle]
  • kubeadm: fixed the bug where --image-repository flag is missing for some init phase sub-commands. (#120072, @SataQiu) [sig/cluster-lifecycle]
  • kubeadm: improved the logic that checks whether a systemd service exists. (#120514, @fengxsong) [sig/cluster-lifecycle]
  • kubeadm: will now use universal deserializer to decode static pod. (#120549, @pacoxu) [sig/cluster-lifecycle]
  • kubectl prune v2: Switched annotation from contains-group-resources to contains-group-kinds, because this is what we defined in the KEP and is clearer to end-users. Although the functionality is in alpha, we will recognize the prior annotation. This migration support will be removed in beta/GA. (#118942, @justinsb) [sig/cli]
  • kubectl will not print events if --show-events=false argument is passed to describe PVC subcommand. (#120380, @MaGaroo) [sig/cli]
  • scheduler: Fixed missing field apiVersion from events reported by the taint manager. (#114095, @aimuz) [sig/scheduling,sig/node,sig/apps]

Other (Cleanup or Flake)

  • Added automatic download of the CNI binary in local-up-cluster.sh, facilitating local debugging. (#120312, @HirazawaUi) [sig/network,sig/node]
  • Added context to caches populated log messages. (#119796, @sttts) [sig/api-machinery]
  • Changed behavior of kube-proxy by allowing to set sysctl values lower than the existing one. (#120448, @aroradaman) [sig/network]
  • Cleaned up kube-apiserver HTTP logs for impersonated requests. (#119795, @sttts) [sig/api-machinery]
  • Deprecated the --cloud-provider and --cloud-config CLI parameters in kube-apiserver. These parameters will be removed in a future release. (#120903, @dims) [SIG API Machinery] [sig/api-machinery]
  • Dynamic resource allocation: will now avoid creating a new gRPC connection for every call of prepare/unprepare resource(s). (#118619, @TommyStarK) [sig/node]
  • E2E storage tests: setting test tags like [Slow] via the DriverInfo.FeatureTag field is no longer supported. (#121391, @pohly) [sig/storage,sig/testing]
  • Fixed an issue where the vsphere cloud provider would not trust a certificate if:
  • The issuer of the certificate was unknown (x509.UnknownAuthorityError)
  • The requested name did not match the set of authorized names (x509.HostnameError)
  • The error surfaced after attempting a connection contained one of the substrings: "certificate is not trusted" or "certificate signed by unknown authority". (#120736, @MadhavJivrajani) [sig/architecture,sig/cloud-provider]
  • Fixed bug where Adding GroupVersion log line was constantly repeated without any group version changes. (#119825, @Jefftree) [sig/api-machinery]
  • Generated ResourceClaim names are now more readable because of an additional hyphen before the random suffix (<pod name>-<claim name>-<random suffix>). (#120336, @pohly) [sig/node,sig/apps]
  • Graduated JobReadyPods to stable. The feature gate can no longer be disabled. (#121302, @stuton) [sig/apps,sig/testing]
  • Improved memory usage of kube-controller-manager by dropping the .metadata.managedFields field that kube-controller-manager doesn't require. (#118455, @linxiulei) [sig/api-machinery,sig/cloud-provider]
  • Lower and upper case feature flag values are now allowed, but the name still has to match. (#121441, @soltysh) [sig/cli]
  • Makefile and scripts now respect GOTOOLCHAIN and otherwise ensure ./.go-version is used. (#120279, @BenTheElder) [sig/release]
  • Migrated the remainder of the scheduler to use contextual logging. (#120933, @mengjiao-liu) [SIG Instrumentation, Scheduling and Testing] [sig/scheduling,sig/instrumentation,sig/testing]
  • Optimized NodeUnschedulable Filter to avoid unnecessary calculations. (#119399, @wackxu) [sig/scheduling]
  • Previous versions of Kubernetes on Google Cloud required that workloads (e.g. Deployments, DaemonSets, etc.) which used PersistentDisk volumes were using them in read-only mode. This validation provided very little value at relatively host implementation cost, and will no longer be validated. If this is a problem for a specific use-case, please set the SkipReadOnlyValidationGCE gate to false to re-enable the validation, and file a Kubernetes bug with details. (#121083, @thockin) [sig/apps]
  • Previously, the pod name and namespace were eliminated in the event log message. This PR attempts to add the preemptor pod UID in the preemption event message logs for easier debugging and safer transparency. (#119971, @kwakubiney) [SIG Scheduling] [sig/scheduling]
  • Promoted to conformance a test that verified that Services only forward traffic on the port and protocol specified. (#120069, @aojea) [sig/network,sig/testing,sig/architecture]
  • Removed GA feature gate about CSIMigrationvSphere. (#121291, @bzsuni) [sig/storage,sig/node,sig/api-machinery]
  • Removed GA feature gate about ProbeTerminationGracePeriod. (#121257, @bzsuni) [sig/node,sig/testing]
  • Removed GA feature gate for JobTrackingWithFinalizers in v1.28. (#119100, @bzsuni) [sig/apps]
  • Removed GAed feature gate TopologyManager. (#121252, @tukwila) [sig/node]
  • Removed GAed feature gates OpenAPIV3. (#121255, @tukwila) [sig/api-machinery,sig/testing]
  • Removed GAed feature gates SeccompDefault. (#121246, @tukwila) [sig/node]
  • Removed ephemeral container legacy server support for the server versions prior to 1.22. (#119537, @ardaguclu) [sig/cli]
  • Removed the CronJobTimeZone feature gate (the feature is stable and always enabled)
  • Removed the JobMutableNodeSchedulingDirectives feature gate (the feature is stable and always enabled)
  • Removed the LegacyServiceAccountTokenNoAutoGeneration feature gate (the feature is stable and always enabled) (#120192, @SataQiu) [SIG Apps, Auth and Scheduling] [sig/scheduling,sig/auth,sig/apps]
  • Removed the DownwardAPIHugePages feature gate (the feature is stable and always enabled) (#120249, @pacoxu) [SIG Apps and Node] [sig/node,sig/apps]
  • Removed the GRPCContainerProbe feature gate (the feature is stable and always enabled). (#120248, @pacoxu) [sig/node,sig/api-machinery,sig/cli]
  • Renamed apiserver_request_body_sizes metric to apiserver_request_body_size_bytes. (#120503, @dgrisonnet) [sig/api-machinery]
  • Set the resolution for the job_controller_job_sync_duration_seconds metric from 4ms to 1min. (#120577, @alculquicondor) [sig/apps,sig/instrumentation]
  • The horizontalpodautoscaling and clusterrole-aggregation controllers now assume the autoscaling/v1 and rbac.authorization.k8s.io/v1 APIs are available. If you disable those APIs and do not want to run those controllers, exclude them by passing --controllers=-horizontalpodautoscaling or --controllers=-clusterrole-aggregation to kube-controller-manager. (#117977, @liggitt) [SIG API Machinery and Cloud Provider] [sig/api-machinery,sig/cloud-provider]
  • The metrics controlled by the ComponentSLIs feature-gate and served at /metrics/slis are now GA and unconditionally enabled. The feature-gate will be removed in v1.31. (#120574, @logicalhan) [sig/network,sig/scheduling,sig/node,sig/api-machinery,sig/instrumentation,sig/architecture,sig/cloud-provider]
  • Updated CNI plugins to v1.3.0. (#119969, @saschagrunert) [sig/node,sig/testing,sig/cloud-provider]
  • Updated cri-tools to v1.28.0. (#119933, @saschagrunert) [sig/cloud-provider]
  • Updated distroless-iptables to use registry.k8s.io/build-image/distroless-iptables:v0.3.1. (#120352, @saschagrunert) [sig/testing,sig/release]
  • Updated runc to 1.1.10. (#121739, @ty-dc) [sig/node,sig/architecture]
  • Upgraded coredns to v1.11.1. (#120116, @tukwila) [sig/cluster-lifecycle,sig/cloud-provider]
  • EnqueueExtensions from plugins other than PreEnqueue, PreFilter, Filter, Reserve and Permit are now ignored. It reduces the number of kinds of cluster events the scheduler needs to subscribe/handle. (#121571, @sanposhiho) [sig/scheduling]
  • GetPodQOS(pod *core.Pod) function now returns the stored value from PodStatus.QOSClass, if set. To compute/evaluate the value of QOSClass from scratch, ComputePodQOS(pod*core.Pod) must be used. (#119665, @vinaykul) [sig/scheduling,sig/node,sig/api-machinery,sig/apps,sig/cli,sig/testing]
  • RetroactiveDefaultStorageClass feature gate that graduated to GA in v1.28 and was unconditionally enabled has been removed in v1.29. (#120861, @RomanBednar) [sig/storage]
  • Statefulset now waits for new replicas in tests when removing .start.ordinal. (#119761, @soltysh) [sig/apps,sig/testing]
  • ValidatingAdmissionPolicy and ValidatingAdmissionPolicyBinding objects are persisted in etcd using the v1beta1 version. Either remove alpha objects, or disable the alpha ValidatingAdmissionPolicy feature in a v1.27 server before upgrading to a v1.28 server with the beta feature and API enabled. (#120018, @liggitt) [sig/api-machinery,sig/testing]
  • client-go: k8s.io/client-go/tools events and record packages now have new APIs for specifying a context and logger. (#120729, @pohly) [sig/api-machinery,sig/instrumentation]
  • kube-controller-manager help now includes controllers behind a feature gate in --controllers flag. (#120371, @atiratree) [sig/api-machinery]
  • kubeadm: removed system:masters organization from apiserver-etcd-client certificate. (#120521, @SataQiu) [sig/cluster-lifecycle]
  • kubeadm: removed leftover disclaimer that could be seen in the kubeadm init phase certs command help screen, since the "certs" phase of "init" is no longer alpha. (#121172, @SataQiu) [sig/cluster-lifecycle]
  • kubeadm: updated warning message when swap space is detected. When swap is active on Linux, kubeadm explains that swap is supported for cgroup v2 only and is beta but disabled by default. (#120198, @pacoxu) [sig/cluster-lifecycle]
  • kubectl will not support the /swagger-2.0.0.pb-v1 endpoint that has been long deprecated. (#119410, @Jefftree) [sig/api-machinery]
  • scheduler: handling of unschedulable pods because a ResourceClass is missing is a bit more efficient and no longer relies on periodic retries. (#120213, @pohly) [sig/scheduling,sig/node,sig/testing]
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