![]() INFO Generating admin certificates and kubeconfig INFO Successfully Deployed state file at INFO Successfully fetched Cluster certificates from Kubernetes INFO Getting Cluster certificates from Kubernetes INFO Successfully Fetched cluster state to Kubernetes ConfigMap: cluster-state INFO Fetching cluster state from Kubernetes INFO host is active master on the cluster INFO Successfully Deployed local admin kubeconfig at INFO Rebuilding and updating local kube config INFO Possible legacy cluster detected, trying to upgrade rke_linux-amd64-0.2.8 up -config 3-node-rancher-teststage.yml Then rke is launched with the yaml file which was used to create the cluster: $ chmod 755 rke_linux-amd64 mv rke_linux-amd64 In the following example the local cluster is upgraded from Kubernetes 1.11.3 to 1.14.6 (using the rke default) using rke 0.2.8: To find out which Kubernetes version is set to default on which rke version, read the rke release page. However it is also possible to simply use the latest released version of rke to upgrade Kubernetes to the "current default version". ![]() rke_linux-amd64-1.1.2 up -config 3-node-rancher-test.ymlįATA Failed to validate cluster: v1.15.12-rancher1-2 is an unsupported Kubernetes version and system images are not populated: etcd image is not populated rke itself should alert if this is the case: ![]() Not all rke versions support all Kubernetes/hyperkube releases. The list of Rancher hyperkube releases shows which versions are available. It can grow large and complex if one wants to overwrite certain default settings, but a basic example looks like this:Īccording to the documentation, the yaml file can be adjusted to contain the wanted Kubernetes version using the rancher/hyperkube image, using the kubernetes_version value and a specific version tag: This yaml file contains some basic information of the Rancher cluster, mainly about the nodes involved. When the cluster was first created using rke, a yaml configuration file was used. Here the rke command needs to be used same command which was used at the very beginning to create the Rancher 2 cluster. Unfortunately the "local" cluster, meaning the cluster running Rancher itself, cannot be upgraded that easy. Kubernetes version upgrade on the local cluster In Rancher's documentation this is often referred to as " Rancher managed clusters". Here Rancher deploys Kubernetes in the background using its own internal tool-set to the new cluster. "child" (or more easily to understand "tenant") clusters which are created within Rancher management.This cluster is built at the beginning using the rke command (a Rancher-own command). Meaning the user interface, the API, in general the services related to the whole Rancher management environment. The " local" cluster on which Rancher itself runs.If the whole Kubernetes upgrading process is too much hassle and you simply want to enjoy an available Kubernetes cluster to deploy your applications, check out the Private Kubernetes Cloud Infrastructure at Infiniroot!īasically there are two types of Kubernetes clusters in a Rancher 2 environment: This article should help see the differences and guide through a Kubernetes upgrade. The official documentation can be quite confusing, mentioning helm to upgrade Rancher, rke for Kubernetes and then again upgrading through the user interface. However upgrading Rancher itself does not include a Kubernetes version upgrade - this needs to be done separately. How to upgrade Kubernetes version in a Rancher 2 managed clusterĪ previous article described how Rancher 2 can be upgraded to a newer release.
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