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The options and settings available for an existing cluster change based on the method that you used to provision it. For example, only clusters have Cluster Options available for editing.
The following table summarizes the options and settings available for each cluster type:
* Cluster configuration options can’t be edited for imported clusters, except for K3s clusters.
In clusters launched by RKE, you can edit any of the remaining options that follow.
Note that these options are not available for imported clusters or hosted Kubernetes clusters.
| Option | Description |
|---|---|
| Kubernetes Version | The version of Kubernetes installed on each cluster node. For more detail, see . |
| Network Provider | The \container networking interface (CNI) that powers networking for your cluster. Note: You can only choose this option while provisioning your cluster. It cannot be edited later. |
| Project Network Isolation | As of Rancher v2.0.7, if you’re using the Canal network provider, you can choose whether to enable or disable inter-project communication. |
| Nginx Ingress | If you want to publish your applications in a high-availability configuration, and you’re hosting your nodes with a cloud-provider that doesn’t have a native load-balancing feature, enable this option to use Nginx ingress within the cluster. |
| Metrics Server Monitoring | Each cloud provider capable of launching a cluster using RKE can collect metrics and monitor for your cluster nodes. Enable this option to view your node metrics from your cloud provider’s portal. |
| Pod Security Policy Support | Enables pod security policies for the cluster. After enabling this option, choose a policy using the Default Pod Security Policy drop-down. |
| Docker version on nodes | Configures whether nodes are allowed to run versions of Docker that Rancher doesn’t officially support. If you choose to require a , Rancher will stop pods from running on nodes that don’t have a supported Docker version installed. |
| Docker Root Directory | The directory on your cluster nodes where you’ve installed Docker. If you install Docker on your nodes to a non-default directory, update this path. |
| Default Pod Security Policy | If you enable Pod Security Policy Support, use this drop-down to choose the pod security policy that’s applied to the cluster. |
| Cloud Provider | If you’re using a cloud provider to host cluster nodes launched by RKE, enable this option so that you can use the cloud provider’s native features. If you want to store persistent data for your cloud-hosted cluster, this option is required. |
Instead of using the Rancher UI to choose Kubernetes options for the cluster, advanced users can create an RKE config file. Using a config file allows you to set any of the options available in an RKE installation, except for system_images configuration, by specifying them in YAML.
- To edit an RKE config file directly from the Rancher UI, click Edit as YAML.
For the complete reference of configurable options for RKE Kubernetes clusters in YAML, see the
In Rancher v2.0.0-v2.2.x, the config file is identical to the cluster config file for the Rancher Kubernetes Engine, which is the tool Rancher uses to provision clusters. In Rancher v2.3.0, the RKE information is still included in the config file, but it is separated from other options, so that the RKE cluster config options are nested under the directive. For more information, see the
Clusters that were created before Kubernetes 1.16 will have an updateStrategy of OnDelete. Clusters that were created with Kubernetes 1.16 or newer will have .
