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Edit info on YAML config options (#1829)
* Edit info on YAML config options * Edit cluster config doc * Minor edits to cluster config doc * Change example YAMLs in cluster config options
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Catherine Luse
Denise
@@ -1,14 +1,14 @@
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---
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title: Cluster Options
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weight: 2250
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---
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---
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As you configure a new cluster that's provisioned using [RKE]({{< baseurl >}}/rke/latest/en/), you can choose custom Kubernetes options.
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You can configure Kubernetes options one of two ways:
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- [Rancher UI](#rancher-ui): Use the Rancher UI to select options that are commonly customized when setting up a Kubernetes cluster.
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- [Config File](#config-file): Alternatively, you can create a [RKE config file]({{< baseurl >}}/rke/latest/en/config-options/) to customize any option offered by Kubernetes.
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- [Config File](#config-file): The cluster config file allows you to use any option offered by Kubernetes by specifying them in YAML. In Rancher v2.0.0-v2.2.x, the config file is identical to the [cluster config file for the Rancher Kubernetes Engine]({{<baseurl>}}/rke/latest/en/config-options/), 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 `rancher_kubernetes_engine_config` directive.
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## Rancher UI
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@@ -107,7 +107,188 @@ Instead of using the Rancher UI to choose Kubernetes options for the cluster, ad
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For an example of RKE config file syntax, see the [RKE documentation]({{< baseurl >}}/rke/latest/en/example-yamls/).
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The structure of the config file is different depending on your version of Rancher. Below are example config files for Rancher v2.0.0-v2.2.x and for Rancher v2.3.0+.
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### Config File Structure in Rancher v2.3.0+
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RKE (Rancher Kubernetes Engine) is the tool that Rancher uses to provision Kubernetes clusters. Rancher's cluster config files used to have the same structure as [RKE config files,]({{<baseurl>}}/rke/latest/en/example-yamls/) but the structure changed so that in Rancher, RKE cluster config items are separated from non-RKE config items. Therefore, configuration for your cluster needs to be nested under the `rancher_kubernetes_engine_config` directive in the cluster config file. Cluster config files created with earlier versions of Rancher will need to be updated for this format. An example cluster config file is included below.
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{{% accordion id="v2.3.0-cluster-config-file" label="Example Cluster Config File for Rancher v2.3.0+" %}}
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```yaml
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#
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# Cluster Config
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#
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docker_root_dir: /var/lib/docker
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enable_cluster_alerting: false
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enable_cluster_monitoring: false
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enable_network_policy: false
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local_cluster_auth_endpoint:
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enabled: true
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#
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# Rancher Config
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#
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rancher_kubernetes_engine_config: # Your RKE template config goes here.
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addon_job_timeout: 30
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authentication:
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strategy: x509
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ignore_docker_version: true
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#
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# # Currently only nginx ingress provider is supported.
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# # To disable ingress controller, set `provider: none`
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# # To enable ingress on specific nodes, use the node_selector, eg:
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# provider: nginx
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# node_selector:
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# app: ingress
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#
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ingress:
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provider: nginx
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kubernetes_version: v1.15.3-rancher3-1
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monitoring:
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provider: metrics-server
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#
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# If you are using calico on AWS
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#
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# network:
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# plugin: calico
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# calico_network_provider:
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# cloud_provider: aws
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#
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# # To specify flannel interface
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#
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# network:
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# plugin: flannel
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# flannel_network_provider:
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# iface: eth1
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#
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# # To specify flannel interface for canal plugin
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#
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# network:
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# plugin: canal
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# canal_network_provider:
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# iface: eth1
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#
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network:
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options:
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flannel_backend_type: vxlan
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plugin: canal
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#
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# services:
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# kube-api:
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# service_cluster_ip_range: 10.43.0.0/16
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# kube-controller:
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# cluster_cidr: 10.42.0.0/16
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# service_cluster_ip_range: 10.43.0.0/16
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# kubelet:
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# cluster_domain: cluster.local
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# cluster_dns_server: 10.43.0.10
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#
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services:
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etcd:
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backup_config:
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enabled: true
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interval_hours: 12
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retention: 6
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safe_timestamp: false
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creation: 12h
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extra_args:
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election-timeout: 5000
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heartbeat-interval: 500
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gid: 0
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retention: 72h
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snapshot: false
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uid: 0
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kube_api:
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always_pull_images: false
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pod_security_policy: false
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service_node_port_range: 30000-32767
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ssh_agent_auth: false
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windows_prefered_cluster: false
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```
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{{% /accordion %}}
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### Config File Structure in Rancher v2.0.0-v2.2.x
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An example cluster config file is included below.
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{{% accordion id="prior-to-v2.3.0-cluster-config-file" label="Example Cluster Config File for Rancher v2.0.0-v2.2.x" %}}
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```yaml
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addon_job_timeout: 30
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authentication:
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strategy: x509
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ignore_docker_version: true
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#
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# # Currently only nginx ingress provider is supported.
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# # To disable ingress controller, set `provider: none`
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# # To enable ingress on specific nodes, use the node_selector, eg:
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# provider: nginx
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# node_selector:
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# app: ingress
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#
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ingress:
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provider: nginx
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kubernetes_version: v1.15.3-rancher3-1
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monitoring:
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provider: metrics-server
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#
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# If you are using calico on AWS
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#
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# network:
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# plugin: calico
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# calico_network_provider:
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# cloud_provider: aws
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#
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# # To specify flannel interface
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#
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# network:
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# plugin: flannel
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# flannel_network_provider:
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# iface: eth1
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#
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# # To specify flannel interface for canal plugin
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#
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# network:
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# plugin: canal
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# canal_network_provider:
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# iface: eth1
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#
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network:
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options:
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flannel_backend_type: vxlan
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plugin: canal
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#
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# services:
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# kube-api:
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# service_cluster_ip_range: 10.43.0.0/16
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# kube-controller:
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# cluster_cidr: 10.42.0.0/16
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# service_cluster_ip_range: 10.43.0.0/16
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# kubelet:
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# cluster_domain: cluster.local
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# cluster_dns_server: 10.43.0.10
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#
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services:
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etcd:
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backup_config:
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enabled: true
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interval_hours: 12
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retention: 6
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safe_timestamp: false
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creation: 12h
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extra_args:
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election-timeout: 5000
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heartbeat-interval: 500
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gid: 0
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retention: 72h
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snapshot: false
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uid: 0
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kube_api:
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always_pull_images: false
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pod_security_policy: false
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service_node_port_range: 30000-32767
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ssh_agent_auth: false
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```
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{{% /accordion %}}
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### Default DNS provider
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