Kubeadm feature gates. 617596 13469 Jan 28, 2025 · --feature-gates=".
Kubeadm feature gates. I want to disable the GracefulNodeShutdown and as far as I understood, this is a kubelet thing. 5 to a dual stack CentOS v7. 31 introduces a range of significant features and changes that enhance the reliability, security, and manageability of… Aug 14, 2024 · Explore Kubernetes 1. -feature-gates 커맨드 라인 플랙이나 kubulet, api server 설정 파일을 통해 Alpha, Beta Feature에 대해서 기능을 활성/비활성 시킬 수 있다. The configuration file is used in case any images or image repositories are customized OPTIONS ¶ --allow --config ="" Path to a kubeadm configuration file. --cri-socket string Path to the CRI socket to connect. Configuring the container runtime cgroup driver The Container runtimes page explains that the systemd driver is recommended for kubeadm based setups instead of the kubelet's The command accepts as input a list of providers to install; when executed for the first time, clusterctl init automatically adds to the list the cluster-api core provider, and if unspecified, it also adds the kubeadm bootstrap and kubeadm control-plane providers. 23, we should skip the prelight check by default as it will be beta. Detailed Description Currently we want to enable the Kubeadm v1. Example de Jun 28, 2018 · What keywords did you search in kubeadm issues before filing this one? kubeadm token create feature_gate Is this a BUG REPORT or FEATURE REQUEST? BUG REPORT Versions kubeadm version kubeadm version: &version. Nov 14, 2018 · we have removed the feature gate from kubeadm 1. Dec 16, 2021 · Steps I have a use case in which I want to create a kubernetes cluster from scratch using kubeadm. This is a Feature Request What would you like to be added Document all the feature gates for kubeadm Why is this needed https://kubernetes. there are a number of problems with the DKC feature, one of which is related to privileges. Aug 30, 2018 · as discussed in the kubeadm office hours on 29th August 2018, it was noted that we have feature gates in both the ClusterConfiguration and in the JoinConfiguration for v1alpha3. Sep 4, 2025 · Synopsis Pull images used by kubeadm kubeadm config images pull [flags] Options --config string Path to a kubeadm configuration file. Info {Major:"1", Minor:"11", G Mar 15, 2018 · Choose one: BUG REPORT I have the HighAvailability feature gate enabled in my kubeadm configuration file. Dec 8, 2024 · Conclusion Feature gates are a powerful mechanism in Kubernetes that empowers developers to experiment with new features while ensuring the system remains stable and compatible. In order to provide a consistent and good UX, kubeadm needs to automatically opt into dependent feature gates of a chosen one. 13). 0 to stx 7. 27 feature gate EtcdLe May 27, 2025 · In the Beta phase, the feature gate is enabled by default. 31. 1 Like pcasis November 13, 2019, 10:57am 3 Jul 31, 2018 · 1 As far as I know and as per all available information: There is no way no enable audit log on minikube. I've tried to set up a new 1. You can however supply a config file to kubeadm that includes the desired feature-gates on the components you need. kubeadm init phase addon coredns [flags] Options --config string Path to a kubeadm configuration file. I've tried using the kubelet flag --config to enable them, as kubelet --feature-gates <feature gate> throws an error saying that the feature has been deprecated. --dry-run Don't apply any changes; just output what would be done. 20. # Upgrade kubeadm to latest version before running below command: # With "CoreDNS" addon (recommended) kubeadm init --feature-gates=CoreDNS=true | tee ~/kubeadm_init. 特性门控 此页面概述了管理员可以在不同 Kubernetes 组件上指定的各种功能门。 有关功能的阶段说明，请参阅 功能阶段。 概述 功能门是一组描述 Kubernetes 功能的键值对。您可以使用每个 Kubernetes 组件上的 --feature-gates 命令行标志来开启或关闭这些功能。 每个 Kubernetes 组件都允许您启用或禁用一组与 Mar 27, 2018 · What you expected to happen? kube-dns and CoreDNS should show the correct version, i. 4 and I cannot use anymore the feature gates TTLAfterFinished. 10. for kubeadm questions you can also use #kubeadm on k8s slack. 20). kubeadm init --feature-gates TTLAfterFinished=true --v=5 unrecognized feature-gate key: TTLAfterFin Jan 18, 2022 · Feature Gates란 Feature gates 는 kubernetes에서 제공되는 기능 설정에 대한 키-값 세트이다. Oct 24, 2025 · For more information about which feature gates are available with specific versions, and which beta features are enabled by default, see Feature gates for Alpha or Beta features in the Kubernetes documentation. 9 host with the command: kubeadm init --upload-certs --feature-gates IPv6DualStack=true During the initializatio Mar 19, 2024 · Hi everybody, I installed k8s on centos8. How Nov 19, 2017 · There will be a dependency chain between our feature gates. log # with kube-dns addon kubeadm init | tee ~/kubeadm_init. Mar 5, 2019 · Kubeadm does have support for all feature-gates via the CLI. 13 and it has moved under kubeadm alpha kubelet this feature is now not part of the standard init workflow. 23 to 1. 25 cluster with kubeadm with kubelet config apiVersion: kubelet. 22 alpha feature | Kubernetes), it claims that to enable the seccomp feature gate, two edits need to be made: 1. 30. 7. kubeadm/kubectl/kube-apiserver turn on feature gatei'm trying to test the local persistent volume in kubernetes v1. Those plugins will be removed in the release 1. Steps: Depending on which file you're trying to edit, you may need to fully shut down Docker Desktop, and restart WSL. 5: remove feature-gates), 1cdfd78286 (Add a puppet class to support k8s feature-gate update), and cc3cdbd647 (apply feature-gate update during upgrade-activate) were added for stx 6. 0 upgrade (CentOS) for Aug 12, 2021 · Things I’ve tried so far: checked that feature gate is enabled in kubeadm (listed under featureGates option in kubelet. You can turn these features on or off using the --feature-gates command line flag on each Kubernetes Jun 29, 2024 · i think we need to drop support if any flag that performs a cluster reconfiguration on upgrade. It will be removed in a future release. 8 --patches /opt/kubernetes/patches/ --feature-gates ControlPlaneKubeletLocalMode=true Flag --feature-gates has been deprecated, This flag is deprecated and no-op now. You can use kubeadm config print to print the default static configuration that kubeadm uses for kubeadm init and kubeadm join. io/v1beta1 kind: K Aug 27, 2025 · CheckDeprecatedFlags takes a list of existing feature gate flags and validates against the current feature flag set. The feature gate mechanism is what enables incremental graduation of a feature through the stages Alpha, Beta, and GA. 28, but after adding this line under commands cluster is not accessible #3036 To install kube-dns instead, set the CoreDNS feature gate value to false: kubeadm init --feature-gates=CoreDNS=false Upgrading an existing cluster with kubeadm In Kubernetes version 1. Each Nov 13, 2024 · Kubernetes version 1. With this feature gate enabled, when joining a new control plane node, a new etcd member will be created as a learner and promoted to a voting member only after the etcd data are fully aligned. from what i gather (and i may be wrong!) i cannot use kubeadm to add these feature gates: $ sudo kubeadm version kubeadm versi Jul 4, 2025 · To pass a feature gate you can either use the --feature-gates flag for kubeadm init, or you can add items into the featureGates field when you pass a configuration file using --config. 0 --feature-gates=CoreDNS=true In Kubernetes version 1. I have stood up a HA cluster (3 Control Plan 3 Worker nodes). But it is crashing with "panic: assignment to entry in nil map" error kubeadm/kubectl/kube-apiserver turn on feature gatei'm trying to test the local persistent volume in kubernetes v1. Before you begin You should be familiar with the Kubernetes container runtime requirements. --feature-gates ="" A set of key=value pairs that describe feature gates for various features. k8s. NOTE: not all options are documented yet! We will fix this with time, PRs welcome! Name Your Cluster 🔗︎ You can give your cluster a name by specifying it in your config: Dec 25, 2023 · This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components. Enabling Feature Gates 特性开关（Feature Gates）是 Kubernetes 中用来开启实验性功能的配置，可以通过选项 --feature-gates 来给不同的组件（如 kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy等）开启功能特性。 Apr 12, 2022 · non-kubeadm feature gates cannot be used in the kubeadm --feature-gates flag. Oct 2, 2018 · I was trying to run kubelet parameters add --feature-gates=ReadOnlyAPIDataVolumes=false on my GKE node with node version 1. The following command will reapply your cluster with existing settings but will replace CoreDNS with kube-dns. If you’d prefer not to change it with kubeadm you can edit the manist for the component itself (/etc/kubernetes/manifests for kubeadm provisioned clusters) and restart the service. 24 we need to remove the "RemoveSelfLink=false" feature gate from the kubeadm config map and the running K8s components (kube-apiserver, kube-controller-manager, kube-scheduler) Test Plan: PASS: k8s 1. For example, here is what a v1. The name my-cluster will be used regardless of the presence of that value in your config file. Jan 7, 2021 · I had the same intent (as have others in this feature request). 18) General Discussions docs 3 741 August 13, 2021 Checkpoint Restoration Failing in kubeadm General Discussions development 3 815 January 10, 2025 Change feature-gates without Kubeadm General Discussions 4 777 November 14, 2019 [ANNOUNCE] Security release of kubernetes-csi Oct 24, 2025 · For more information about which feature gates are available with specific versions, and which beta features are enabled by default, see Feature gates for Alpha or Beta features in the Kubernetes documentation. --dry-run =false Don't apply any changes; just output what would be done. config. Sep 24, 2019 · Tried bringing up DualStack cluster using kubeadm by setting the "IPv6DualStack: true" feature gate. This post, shows you how to enable a feature gate by enabling the MixedProtocolLBService to the TKG kube-apiserver. from what i gather (and # Note that kubeadm version 1. currently kubeadm does the following: upgrades the control-plane on one node (via "apply") upgrades kube-proxy and coredns upgrade This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components. By understanding how feature gates work and how to implement them, you can enhance your Kubernetes experience and take full advantage of the platform’s capabilities. pp. The same library is used across the Eric Paris Jan 2015 NAME ¶ kubeadm config images list - Print a list of images kubeadm will use. The upgrade workflow is not designed to reconfigure the cluster. 2. How do I do that. 32. I need to enable a few Feature Gates on my bare-metal K8s cluster (v1. (right-click tray-icon and press "Quit Docker Desktop", then run wsl --shutdown, then run wsl) Open the []/kubeadm/manifests folder kind/support Categorizes issue or PR as a support question Jan 24, 2024 · What would you like to be added (User Story)? As an operator I would like to be able to adjust kubeadm feature gates on existing KubeadmControlPlanes. https://kubernetes. 11. Feb 10, 2018 · i'm trying to test the local persistent volume in kubernetes v1. So my problem is when I run “kubeadm init” to initialize the cluster, I have the issue below. In v1. Apr 7, 2021 · hi, kubeadm feature gates are unique for kubeadm and can be seen under the --feature-gates flag. To pass a feature gate you can either use the --feature-gates flag for kubeadm init, or you can add items into the featureGates field when you pass a configuration file using --config. kubeadm upgrade can also be used for downgrading cluster if necessary. Feb 19, 2021 · Hi, I just reset a node with v1. io Jan 29, 2018 · In order to install CoreDNS instead of kube-dns for a fresh Kubernetes cluster, we need to use the feature-gates flag and set it to CoreDNS=true. What you expected to happen? Looking at the source, it appears there actually aren't any in the current version. Nov 8, 2019 · You can’t change feature gates dynamically. Let's see how! Dec 30, 2020 · Kubernetes version:1. Its under implementation right now and lets hope kube team will shortly release this feature. Jul 4, 2025 · To pass a feature gate you can either use the --feature-gates flag for kubeadm init, or you can add items into the featureGates field when you pass a configuration file using --config. It used during upgrades for ensuring consistency of feature gates used in an existing cluster, that might be created with a previous version of kubeadm, with the set of features currently supported by kubeadm If kubeadm is invoked with --feature-gates=HighAvailability, the flag --endpoint-reconciler-type=lease is set, thus enabling automatic reconciliation of endpoints for the internal API server VIP. if swap BLOCKS kubeadm init/join it should not be a WARNING but an ERROR and Mar 20, 2019 · That is, it suggests there are feature gates, but then presents an empty list. 8 and 1. Overview Feature gates are a set of key=value pairs that describe Kubernetes features. Then I got the following error: I1002 00:56:53. 0 upgrade would look like: kubeadm upgrade apply v1. 14. x does not have support for coredns feature gate. Or in 1. You can turn these features on or off using the --feature-gates command line flag on each Kubernetes component. 31's new features: enhanced networking, stronger security, advanced storage, and better hardware management—designed for optimal performance and scalability. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket. Apr 29, 2019 · If you are moving from kube-dns to CoreDNS, make sure to set the CoreDNS feature gate to true during an upgrade. On kubeadm init, that added --endpoint-reconciler-type=lease to the kube-apiserver static pod. io/docs/reference/setup-tools/kubeadm/kubeadm-init/. (#124500, @carlory) [SIG Scheduling and Storage] Kubeadm: deprecated the kubeadm RootlessControlPlane feature gate (previously alpha), given that the core K8s UserNamespacesSupport feature gate graduated to beta in 1. io/v1beta3 kind: May 2, 2025 · kubeadm upgrade apply v1. io/docs/reference/command I am using kubeadm tool to install the Kubernetes cluster. Dec 25, 2023 · This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components. --feature-gates string A set of key=value pairs that Apr 29, 2021 · Hi, just looking for some info how to enable/disable a featureGates in kubeadm init. 10 and later, you can also move to CoreDNS when you use kubeadm to upgrade a cluster that is using kube-dns. For more information, see Feature gates and alpha clusters. 27, kubeadm introduced a new feature gate EtcdLearnerMode. 8 crashes with the following error: [dryrun] Would perform action GET on resource "config Feature Gates This page contains an overview of the various feature gates an administrator can specify on different Kubernetes components. 27の新機能 (Feature Gate)として実装されたInPlacePodVerticalScalingを有効化して使ってみようと思います。 May 17, 2022 · Kubernetes には Feature Gates という「アルファ機能または実験的機能を記述するkey=valueのペアのセット」があります。 古参の Kubernetes ユーザーの方々からすれば「何を今更」という感じでしょうが、新参の私からしたら Feature Dec 25, 2023 · This page contains list of feature gates that have been removed. Turn on the feature by enabling the feature by adding the --seccomp Oct 28, 2019 · I am trying to enable feature gates on a Kubernetes cluster. You can also selectively modify specific feature gates. After running kubeadm upgrade with t Sep 9, 2022 · What happened? Feature Gate ChecpointContainer is unrecognized by kubelet. 22. kubeadm upgrade guidance kubeadm upgrade plan kubeadm upgrade apply kubeadm upgrade diff kubeadm upgrade node config What's May 17, 2023 · I tried kubeadm with the flag --feature-gates=UserNamespacesStatelessPodsSupport=true but I got the error unrecognized feature-gate key: UserNamespacesStatelessPodsSupport Aug 15, 2018 · In the context of Checklist for kubeadm join --control-plane implementation we are going to remove following feature-gates flags HighAvailability, SelfHosting, CertsInSecrets (this Tracking issue f Apr 27, 2021 · In Kubernetes , is there a particular way I can check if a specific feature-gate is enabled/disabled. Jul 4, 2025 · This page explains how to configure the kubelet's cgroup driver to match the container runtime cgroup driver for kubeadm clusters. sigs. 6 respectively. kubelet, kubectl, kubeadm and docker-ce are well installed and running normally. log Nov 9, 2020 · during mutable upgrades, upgrade kube-proxy only after the kube-apiserver on all nodes have been upgraded. This configuration is then read during kubeadm join, kubeadm reset and kubeadm upgrade. How to reproduce it (as minimally and precisely as possible)? kubeadm upgrade plan for kube-dns. Oct 13, 2023 · In this blog, I explain the steps to enable feature gates in a Kubeadm cluster. Jul 17, 2025 · In Kubernetes 1. The following table is a summary of the feature gates that you can set on different Kubernetes components. After several hours of trial and error, I finally found out a way to do so. $ kubeadm init --config admin. Note:The output of the Sep 26, 2018 · /kind bug /sig cli What happened: running kubeadm upgrade apply --dry-run --feature-gates=CoreDNS=true 1. Aug 12, 2024 · Kubernetes components use on-off switches called feature gates to manage the risk of adding a new feature. 617596 13469 Jan 28, 2025 · --feature-gates=",DynamicKubeletConfig=true" 次の表は各Kubernetesコンポーネントに設定できるフィーチャーゲートの概要です。 「導入開始バージョン」列は機能が導入されたとき、またはリリース段階が変更されたときのKubernetesリリースバージョンとなります。 During a K8s feature upgrade from 1. 23 upgrade with custom extraArgs removes RemoveSel… Mar 5, 2019 · Kubeadm does have support for all feature-gates via the CLI. yaml in running k8s cluster 1. It is good to see that the feature itself is enabled. Say, I want to check if MountPropagation feature is enabled in my cluster. in terms of mixing: --dry-run and --feature-gates=DynamicKubeletConfig=true Sep 8, 2021 · There should be NodeSwap support in kubeadm init and we can skip the check if the feature gate is enabled. However, a GA'ed or a deprecated feature gate is still recognized by the corresponding Kubernetes components although they are unable to cause any Apr 6, 2021 · When adding only "IPv6DualStack" to kube_feature_gates there is no issue as it is part of - what I think is - kubeadm feature gates (with PublicKeysECDSA for example in 1. --feature-gates string A set of key=value pairs that describe feature Sep 21, 2019 · What happened: kubeadm init --feature-gates get panic What you expected to happen: no panic How to reproduce it (as minimally and precisely as possible): kubeadm init --feature-gates Anything else If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket. Each Overview Using a Feature Overview Feature gates are a set of key=value pairs that describe alpha or experimental features. 2. This feature gate is based on the x-kubernetes-validations extension and uses Common Expression Language (CEL) to validate CRDs. Mar 15, 2022 · Feature gates are a set of key=value pairs that describe Kubernetes features. --control-plane-endpoint ="" Specify a stable IP address or DNS name for the control plane. The set of changes here, a6a5349d02 (k8s-1. from what i gather (and This change removes puppet class update_kubeadm_feature_gates from kubernetes. Mar 19, 2024 · feature-gate=SCTPSupport=true added in apiserver. io/v1beta1 object) checked that kubeadm runs and upgrades the cluster checked that featu… Dec 29, 2023 · 特性门控 本页详述了管理员可以在不同的 Kubernetes 组件上指定的各种特性门控。 关于特性各个阶段的说明，请参见 特性阶段。 概述 特性门控是描述 Kubernetes 特性的一组键值对。你可以在 Kubernetes 的各个组件中使用 --feature-gates 标志来启用或禁用这些特性。 每个 Kubernetes 组件都支持启用或禁用与该 Mar 30, 2021 · What happened: I used kubeadm to deploy Kubernetes v1. yaml: apiVersion: kubeadm. An administrator can use the --feature-gates command line flag on each component to turn a feature on or off. --feature-gates us such a flag Ok, I will send a PR later to deprecate --feature-gates flag for kubeadm upgrade apply/plan what other flags are problematic? Maybe not completely, but I found these problems: May 14, 2023 · LinuCエヴァンジェリスト・Open Source Summit Japan 2022ボランティアリーダーの鯨井貴博@opensourcetechです。 はじめに 今回は、kubernetes 1. Dec 22, 2017 · New issue New issue Closed Closed kubeadm-gce-dns-coredns failed due to unknown flag: --kubernetes-anywhere-kubeadm-feature-gates #6069 Mar 6, 2019 · General Discussions 7 911 December 30, 2020 Enabling feature gate doesn't seem to work (ServiceAppProtocol, k8s 1. May 1, 2025 · 本文介绍了如何在已有的k8s集群中开启新的feature-gates，以ServiceTopology为例，详细步骤包括编辑kubeadm配置、kube-proxy的configmap、apiserver、controller-manager和scheduler的配置文件，确保所有相关组件都启用了所需feature-gates。此外，还提供了查看官方文档和根据组件类型进行配置更新的一般方法。 Nov 16, 2018 · Notifications You must be signed in to change notification settings Fork 734 Aug 17, 2024 · During kubeadm init, kubeadm uploads the ClusterConfiguration object to your cluster in a ConfigMap called kubeadm-config in the kube-system namespace. 13 and later the CoreDNS feature gate is removed and CoreDNS is used by default. By default, kubeadm runs a local etcd instance on each control plane node. kubeadm upgrade plan --feature-gates CoreDNS=true for CoreDNS. Oct 19, 2021 · Feature Gates — How to enable Kubernetes Alpha features Recently I wanted to experiment with the new Pod Security Admission controller which is an alpha feature in Kubernetes 1. 9. The flag should either be omitted completely, or (probably better) explain that there aren't any valid values. 20 Cloud being used: bare-metal Installation method:kubeadm init --config Host OS: CentOS 8 CNI and version: Calico CRI and version: Containerd I am new to Kubernetes. The information on this page is for reference. However I am seeing a lot about different Feature Gates that need to be installed. Dec 11, 2024 · The values for kubeadm init --feature-gate are kubeadm 's own featuregates (not Kubernetes core component feature gates), while MutatingAdmissionPolicy is a kube-apiserver feature gate. You can turn these features on or off using the a ytt overlay file or by editing KubeadmControlPlane or VSphereMachineTemplate. I have tried using kubeadm call kubeadm config images list --feature-gates TTLAfterFinished=true however Sep 25, 2023 · By default, kubeadm runs a local etcd instance on each control plane node. Feature gates in Kubernetes let you enable alpha/beta features in your Kubernetes cluster. Nov 13, 2019 · To enable feature gates it should be something like this: --feature-gates=ExpandCSIVolumes=true Did you use that syntax and the error still popped up? Sep 4, 2025 · Please note that although the DNS server is deployed, it will not be scheduled until CNI is installed. 8. I should not have to check the source to understand why there are no options presented. Please edit the 'featureGates' field of ClusterConfiguration which is defined in the kube Edit This Page kubeadm upgrade kubeadm upgrade is a user-friendly command that wraps complex upgrading logic behind one command, with support for both planning an upgrade and actually performing it. A removed feature gate is different from a GA'ed or deprecated one in that a removed one is no longer recognized as a valid feature gate. 0. If the feature gate is disabled, kubeadm subcommands will not be changed. Jun 12, 2024 · Kubeadm: deprecated the kubeadm RootlessControlPlane feature gate (previously alpha), given that the core K8s UserNamespacesSupport feature gate graduated to Beta in 1. Kubernetes components, such as kube-controller-manager and kube-scheduler, use the client-go library to interact with the API. Feb 7, 2024 · [WARNING Swap]: swap is enabled; production deployments should disable swap unless testing the NodeSwap feature gate of the kubelet when swap enabled, kubadm init/join fails with obscure errors and for no apparent reason. The configuration file is used in case any images or image repositories are customized SYNOPSIS ¶ kubeadm config images list [OPTIONS] DESCRIPTION ¶ Print a list of images kubeadm will use. The … Jun 22, 2020 · New version of Kubernetes add more features, however to enable those new features, you generally need to enable them using Feature Gates. See feature stages for an explanation of the stages for a feature. See full list on minikube. 23 and later versions, the CustomResourceValidationExpressions feature gate is enabled for CustomResourceDefinitions (CRDs). Also other kube apiserver settings that need to be changed Jan 27, 2022 · From this official blog entry (Enable seccomp for all workloads with a new v1. Enable the feature gate by setting the SeccompDefault=true via the command line (--feature-gates) or the kubelet configuration file. yaml --v=7 admin. Cluster-Wide Options 🔗︎ The following high level options are available. e 1. k5nw2p s2qmp parv key xwm nq57 dzwe8c dfandkrr y5zp p0q