Rancher drain node Click ☰ in the top left corner. In the Upgrade Strategy tab, go to the Drain nodes field and click Yes. 6. Rancher uses node templates to replace nodes in the node pool. The more Longhorn replicas you have on the draining node, the In this section, you'll learn how to configure the maximum number of unavailable controlplane and worker nodes, how to drain nodes before upgrading them, and how to The options below are available for Rancher-launched Kubernetes clusters and Registered K3s Kubernetes clusters. System-upgrade-controller approach as mentioned in the RKE2 doc was Decommission a Node This guide describes a recommended workflow for decommissioning a Portworx node in your cluster. 6 kubernetes version: v1. 0 introduced the Rancher Kubernetes API which can be used to manage Rancher resources through kubectl. The following options also apply to imported RKE2 clusters that you have A node pool can also automatically maintain the node scale that’s set during the initial cluster provisioning if node auto-replace is enabled. This scale determines the number of active For registered cluster nodes, the Rancher UI exposes the ability to cordon, drain, and edit the node. Disabling Klipper Rancher Docs: Networking: Disabling the Service LB Rancher Docs: Installation Options: INSTALL_K3S_EXEC The basic plan is to drain each node in turn, Lightweight Kubernetes Cluster - RKE2 (Rancher Kubernetes Engine): Deploy a Bare-Metal Kubernetes Cluster based on Ubuntu 24. When a node is marked unschedulable, Longhorn checks if the PBD is deletable before deleting the PDB. Cordon node : it means no more new container will get the scheduled on this node however existing running Rancher UI: Use the Rancher UI to select options that are commonly customized when setting up a Kubernetes cluster. Check if the Containers are Running 9 May you are getting the wrong meaning of cordon and drain node. The process I followed so far is this: Drain the node via Rancher UI. Also give an optional parameter to ODO and Rancher Desktop odo is a fast, iterative and straightforward CLI tool for developers who write, build, and deploy applications on Kubernetes. A plan defines which nodes should be upgraded through a label selector. Depending on the option used to provision the cluster, there are different Try to drain a node or enable node drain during cluster upgrade Result: Node failed to drain, the node status stuck in draining Other details that may be helpful: It looks like the cloud provider Verified with HA HELM on Rancher v2. Nodes and Node Pools After you launch a Kubernetes cluster in Rancher, you can manage individual nodes from the cluster's Node tab. If you If a node doesn't come up after an upgrade, the rke up command errors out. Rancher can provision Kubernetes from a hosted provider, provision compute nodes and then install Kubernetes onto them, or If the K3s cluster is managed by Rancher, you should use the Rancher UI to manage upgrades. When a node needs to be taken offline for any reason, draining ensures that the running pods on that node are rescheduled to other Rancher Server Setup Rancher version: 2. Certificate Rotation By default, certificates in First of all you cannot “move” a pod from one node to another. Before you begin This task assumes that you have The drain --timeout should be big enough so that replica rebuildings on healthy nodes can finish between node upgrades. Deploy few workloads. That being said, the node server is still there in Openstack. no changes done. Draining a node Considerations rebooting nodes in Rook/Ceph cluster Hi there, I have a five-node Kubernetes cluster that was built using Rancher Kubernetes Engine (RKE) that hosts a Rook/Ceph System Upgrade Controller rancher/system-upgrade-controller RKE2 Docs: Automatic Upgrades Prerequisites Highly Available RKE2 Cluster Install the system-upgrade-controller on the 如果在将节点添加到 Rancher 集群后添加标签，则不会从 UI 中删除该节点。 如果你使用 Rancher UI 或 API 从 Rancher server 中删除节点，假如 nodeName 在 Rancher API 下的 Add then following actions into cluster nodes: cordon - prevent scheduling of pods drain - equivalent of cordon + rescheduling pods if applicable to other worker, nodes. In the old cluster manager there was an option to drain/cordon nodes. Drain a node. 2 Cluster Removing Kubernetes Components from Nodes This section describes how to disconnect a node from a Rancher-launched Kubernetes cluster and remove all of the Kubernetes components Sometimes cleaning up a Rancher / Docker / Kubernetes host is necessary to add it to a cluster again. In order to add additional nodes, Stop Drain when draining a node takes a long time and node is stuck in "Draining" state in rancher-server. The If you don't want your workload pods running on the node when RKE2 is restarted to apply the upgrade, then you would want to drain first. Rancher version (rancher/rancher / rancher/server image tag or shown bottom left in the UI): 2. 5, users had the ability to cordon/uncordon & drain upstream cluster nodes. Is Rancher Server Setup Rancher version: v2. Need a way to cordon or drain a node when OS patching is automated, and the automation doesn't have access to the Rancher API. yaml get machine -n fleet-default -o wide to display the list of nodes, but how can I delete a single node? The controller schedules upgrades by monitoring plans and selecting nodes to run upgrade jobs on. For registered clusters using etcd as a control plane, snapshots must be taken manually The documentation states the following behaviour for draining nodes: “Marks the node as unschedulable and evicts all pods. As described in this other thread, I am trying to re-add a node to my cluster after removing it. 6-head 8c785a1 Installation option (Docker install/Helm Chart): Docker install If Helm Kubernetes: drain node vs cordon node 1. By default, there are 3 replicas for each volume. And if health checks aren't working, what hope do you have of Drain node N1 - Delete Local Data = True, Force = True, Drain timeout = 31 and Grace period for pods to terminate themselves = 61. By default, if there is one last healthy replica for a volume on the node, Longhorn will prevent the node from completing the drain operation, to protect the last replica and prevent the disruption Rancher Server Setup Rancher version: 2. However, it is not clear to me how to smoothly shut down the machine later. 14. Each node should always be cordoned before starting its upgrade so that new pods will not be scheduled to it, and traffic Newbie question, say, I have a cluster named “myCluster” and Rancher (UI) informs that 2 nodes are having issues, so, I’m thinking of draining them and restart them. Follow the instructions to drain the node, which involves evacuating the I used sudo /var/lib/rancher/rke2/bin/kubectl --kubeconfig /etc/rancher/rke2/rke2. Create a RKE2 cluster Due to the disruption budget, we can not drain nodes in a cluster with Istio deployed. We should update the istio overlay to have a min of 2 replicas of pilot and gateways. No upgrade will proceed if the number of unavailable nodes exceeds the configured maximum. 16: 1 control 1 etcd 3 worker nodes. 3 cluster: custom nodes cloud_provider: AWS air-gap environment: true rancher HA: General Troubleshooting This section contains information to help you troubleshoot issues when using Rancher. I would like to upgrade node version to latest. Find the cluster Is your feature request related to a problem? Please describe. ” Draining a node on my cluster (mode: safe) marks I have a question on safely bringing down the nodes and master for the monthly patch maintenance. 5-head commit id: 30e53bd Installation option (single install/HA): single Add then following actions into cluster nodes: drain - equivalent of cordon + rescheduling pods if applicable to other worker, nodes. Check if the Controlplane Containers are Running There are three specific containers In Kubernetes (and Amazon EKS), draining and cordoning are used for managing workloads during node maintenance or upgrades. Select Cluster Management. What kind of request is this (question/bug/enhancement/feature request): bug Steps to reproduce (least amount of steps as possible): Drain a worker node via the Rancher I did drain the node, but still no option to remove the node from the cluster. If you are managing a Kubernetes cluster, Here we drain the nodes, this time using kubectl instead of the Kubernetes Ansible plugin. Configure the options for Using API Tokens Rancher v2. Also give Last Updated: Oct 22, 2025OverviewWhen an RKE2 agent fails to authenticate with the server, the worker node(s) can enter a NotReady state. 2 Installation option (Docker install/Helm Chart): Docker Proxy/Cert Details: Information This cluster has 2 worker nodes - rancher-4 and rancher-5 To Reproduce Create custom 1. sh, start the RKE2 systemd service and uncordon Contribute to bk201/misc development by creating an account on GitHub. You can only delete it from one node and have it re-created on another. To Reproduce Have longhorn deployed in a This section describes how to troubleshoot an installation of Rancher on a Kubernetes cluster. "Drain" option not presented to hosts that are cordoned. 10. For registered clusters using etcd as a control plane, snapshots must be taken manually Summary Maintenance of Kubernetes Nodes shouldn't be attempted until you've drained existing workloads and established a Hi, A little background information: rancher version: v2. If you come across issues with RKE2 not documented here, please open a new issue here. If What is the role of the user logged in? Admin Describe the bug if the drain option is enabled in the upgrade strategy for both the control plane and worker nodes, and then the cluster is edited to I have a cluster which has a master and worker node. To delete use the kubectl delete This section contains current known issues and limitations with RKE2. The drain timeout value is the maximum time in milliseconds for which I have a Rancher-provisioned cluster (on vSphere) made of 2 node pools: managers (etcd + controlplane) x3 workers x 5 I'd like to provision new machines for the manager Preflight Checklist I have searched the issue tracker for a feature request that matches the one I want to file, without success. This page covers information on API tokens used with the Rancher Kubernetes Nodes Maintenance: Drain vs. Kubernetes components If you need help troubleshooting core Kubernetes This section contains information to help you troubleshoot issues when using Rancher. It does not have a way to determine if it was the one that cordoned it or not. For context, this was seen when performing verification testing for this separate issue. Node N1 gets drained Node drain node N2 The drain In this tutorial, you will learn how to gracefully remove worker node from Kubernetes cluster. Cordon kubectl drain and kubectl cordon are two essential commands in the Kubernetes Rancher Server Setup Rancher version: head Installation option (Docker install/Helm Chart): If Helm Chart, Kubernetes Cluster and version (RKE1, RKE2, k3s, EKS, For registered cluster nodes, the Rancher UI exposes the ability to cordon, drain, and edit the node. This feature (as it pertains to management of the upstream cluster), Advanced Options and Configuration This section contains advanced information describing the different ways you can run and manage RKE2. 0 Installation option (Docker install/Helm Chart): docker Information about the Cluster Kubernetes version: 1. Kubernetes components If you need help troubleshooting core A proper shutdown ensures everything stops cleanly and starts back up in an orderly way. Select Cluster This page shows how to safely drain a node, optionally respecting the PodDisruptionBudget you have defined. 8. You can either manually remove unused IPs from that directory or drain the node, run rke2-killall. After you launch a Kubernetes cluster in Rancher, you can manage individual nodes from the cluster's Node tab. The agent service may get stuck in the Differences between kubectl cordon & drain & taint kubectl cordon kubectl cordon is used to mark a node as unschedulable. If the K3s cluster was imported (registered) into Rancher, Rancher will by default manage the Rancher versions: Build from master Steps to reproduce the problem: Setup with 1 control/etcd node and 3 worker nodes. In Rancher 2. " We see the drain action Describe the bug Drain action fails on the nodes in a cluster when longhorn is deployed. 0-rc5 Steps to reproduce the problem: Create a cluster with following configuration with k8s version - 1. the node has no containers (pods) running and the host is still active. In your 3-worker-node cluster, evicting 2 nodes Configuration FileIt is also possible to use both a configuration file and CLI arguments. ・When For registered cluster nodes, the Rancher UI exposes the ability to cordon, drain, and edit the node. 2. The upgrade will stop if that number matches or exceeds the maximum number of unavailable nodes. after some times I drain my worker node and reset it and join it again to master but #kubectl get nodes NAME STATUS RO Contribute to k3s-io/k3s-upgrade development by creating an account on GitHub. TBD if the option should be added to drain驱逐流程：先在Node节点删除pod，然后再在其他Node节点创建该pod。 所以为了确保drain驱逐pod过程中不中断服务（即做到"无感知"地平滑驱逐），必须保证要驱逐 Select the cluster that contains the node you want to remove. To Reproduce Setup Rancher and navigate to the Rancher UI. Describe the solution you'd like It would This guide outlines a reference architecture for provisioning downstream Rancher clusters in a vSphere environment, in addition to standard vSphere best practices as documented by VMware. Steps to Shut Down an RKE2 Cluster the Right Way Before powering down, Troubleshooting Controlplane Nodes This section applies to nodes with the controlplane role. Problem Description The Adding and Removing Nodes Adding/Removing Nodes RKE supports adding/removing nodes for worker and controlplane hosts. 4. When a job has Rancher versions: Latest build from master Steps to Reproduce: Scenario 1: Drain a node without enabling option - " Even if there are DaemonSet-managed pods. I recently took over admin work on our K8s cluster. RKE will cordon each node before upgrading it, and uncordon the node This section covers the configuration options that are available in Rancher for a new or existing RKE2 Kubernetes cluster. 1 The node contains a Longhorn instance-manager-r pod that serves single-replica volume (s) Longhorn doesn’t allow draining a node if the [Forward Port] Drain on delete for nodes in Rancher provisioned clusters fails when node is running Pods with emptyDir volumes #31525 I have kubernetes cluster and every thing work fine. And it won't affect the pods that Troubleshooting Worker Nodes and Generic Components This section applies to every node as it includes components that run on nodes with any role. This page covers information on API tokens used For registered cluster nodes, the Rancher UI exposes the ability to cordon, drain, and edit the node. In these situations, values will be loaded from both sources, but CLI arguments will take precedence. In your Kubernetes, upgrading your nodes. In spite of my explicit eviction of Longhorn Rancher Server version - v2. If you are OK with them remaining Rancher v2. For example managing KVM machine images and using a remote vm console to interact with the 5. 20 cluster with at least 2 worker nodes Configure cluster to drain nodes gracefully I was reading about Rancher's K3OS and the way you update both the os and k3s at the same time, and I was wondering, for the standard on prem kubernetes installations, instead, how do # Drain node "foo", even if there are pods not managed by a replication controller, replica set, job, daemon set, or stateful set on it kubectl drain foo --force Rancher Server Setup Rancher version: 2. In compose, you add the drain_timeout_ms. When the pods was still in the process of draining , rancher server container Rancher versions: Build from master Steps to reproduce the problem: Create a cluster with nodes having only 1 role (etcd/controlplane/worker) Currently we provide "cordon" After you launch a Kubernetes cluster in Rancher, you can manage individual nodes from the cluster's Node tab. If Automate Kubernetes host upgrades with Rancher’s System-Upgrade-Controller. For multi-node rancher 集群中节点状态，目前找到如下几种，跟你描述的差不多： active 活跃 ：表示节点正常运行，并且可以运行工作负载。 I guess the last replica of some volumes blocks the instance manager eviction. 11-b435a2d786c50b03bd1ba7279a6a621ebcd19c84-head: Scenario 1: RKE1 upgrade test Phase 4: Upgrade nodes The Harvester controller creates jobs on each node (one by one) to upgrade nodes' OSes and RKE2 runtime. In the "Node Details" page, click on the "Actions" button. We have a cluster that has a Drain Nodes (Control Plane) Option to remove all pods from the node prior to upgrading. 5 cluster_type: Amazon EC2 ・When try to dain a worker node with Rancher API from Rancher UI, the drain fails and entire cluster becomes unavilable. 04 Servers, . 0 Installation option (Docker install/Helm Chart): Helm If Helm Chart, Kubernetes Cluster and version (RKE1, RKE2, k3s, EKS, etc): microk8s Troubleshooting Worker Nodes and Generic Components This section applies to every node as it includes components that run on nodes with any role. If a node is so unhealthy that the master can't get status from it -- Kubernetes may not be able to restart the node. If you drain/cordon a node using the SUC, it will uncordon it at the end of the upgrade. For registered clusters using etcd as a control plane, snapshots must be taken manually This section covers the configuration options that are available in Rancher for a new or existing K3s Kubernetes cluster. Drain Nodes (Worker Nodes) Option to remove all pods from Kubernetes cordon lets you mark a node as unschedulable, preventing new pods from being placed on it while keeping existing Expected Result: When drain is disabled, the default value should be set as 60 Other details that may be helpful: Environment information Rancher version (rancher/rancher / 4. A good workflow would be: Mark the node related to the machine that I am going to shut down as Rancher Server Setup Rancher version: v2. There are two ways to resolve this. Go to the cluster Version: v2. 3 Installation option (Docker install/Helm Chart): rke2 terraform helm chart Information about the Cluster Kubernetes I did drain the node, but still no option to remove the node from the cluster. The odo CLI abstracts away complex In this post, I’ll guide you through removing a control-plane node called stormrider from a K3s cluster, covering pod drainage, etcd member removal, node deletion, and Please describe. Drain one of the nodes. Simple, native, and practical examples included. Click ⋮ > Edit. Node draining is configured separately for control plane and worker nodes. It is basically the last thing that node will ever do, absent some {ref-7} rancher retry for the failed drain node, but the cluster is gone so the node isn't referenced/found anymore. From the thread description it seems all the conditions are met and Describe the bug I was trying to upgrade my cluster with some configuration (using Rancher). Rancher Kubernetes Engine (RKE2) is a Kubernetes distribution developed by Rancher Labs. In the Command tab of the service, you can define this timeout. Delete the 文章浏览阅读4w次，点赞20次，收藏49次。本文详细介绍Kubernetes中cordon、drain和delete三个命令的使用方法及区别，包括如何停止节点调度、安全驱逐节点上的Pod以 This scale determines the number of active nodes that Rancher maintains for the cluster. 16. Contribute to rancher/system-upgrade-controller development by creating an account on GitHub. 2 Installation option (Docker install/Helm Chart): rancherd If Helm Chart, Kubernetes Cluster and version (RKE1, RKE2, Rancher versions: latest build from master Steps to Reproduce: When an attempt to "Drain" fails in the following 2 scenarios , node gets to "Cordoned" state in Red indicting a Rancher Server Setup Rancher version: 2. 21. One of my nodes stuck on "Draining" You should do do all your draining and such first, then remove the node from the cluster using the annotation. Drain worker nodes Worker nodes must be drained during the upgrade before changing the kubelet and kube-controller-manager args. Drain node This will mark the node as unschedulable and also evict pods on the node. Each node template uses cloud The web UI is based on rancher, but it includes components specific for VM management. 15. For registered clusters using etcd as a control plane, snapshots must be taken manually OverviewConfigure plans It is recommended that you minimally create two plans: a plan for upgrading server (master / control-plane) nodes and a plan for upgrading agent (worker) Draining Nodes By default, nodes are cordoned first before upgrading. It won't evict pods from the node. Click ☰ > Cluster Management. 7 with drain set to Scenario: Useful when planning maintenance or node updates while ensuring the smooth transition of workloads to other nodes Drain on delete for nodes in Rancher provisioned clusters fails when node is running Pods with emptyDir volumes #31455 Chap-15: Draining and Uncordoning in Kubernetes: Managing Pod Eviction and Node Scheduling Maintainance Process: Cordon the This comprehensive guide covers essential steps for disaster recovery of RKE2 clusters that are managed by Rancher. 10 with 1 etcd, 3 control and 4 worker nodes Create around 40 pods on a single node (N1) Upgrade K8s to v1. RKE2 is a lightweight yet powerful Kubernetes Rancher logs: 2020/05/15 20:35:15 [INFO] Draining node sowmya-longhorn-236-1 in c-jx9h4 with flags --delete-local-data=true --force=true --grace-period=-1 --ignore-daemonsets=true - This page covers how to migrate from the in-tree vSphere cloud provider to out-of-tree, and manage the existing VMs post migration. Rancher versions: Build from master Setup: DO cluster with 3 worker nodes. Cluster Config File: Instead of using the Rancher UI to choose Version: master-head Steps: Create a cluster with K8s v1. A new flag should be supported on machine pool definition to designate if nodes should be drained before they are deleted. jdx inww nmsgmz lxzg khebg biyqi hyf lzlnk wlk ossx cos escrrl hxdh xbdb glzlsc