#207 Special note on rhel/centos provisioning (#543)

* #207 Special note on rhel/centos provisioning

* word change

* word change

* typo fix

* formating

* added note for nutanix, vsphere, rm'd from amazon

* accidentally removed whole section, not just subsection

* Update docs/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/amazon-ec2.md

* versioned_docs 2.6 updated

* versioned_docs 2.5 updated

issue first raised in 2.5.6

* spacing

* spaced other note to match

versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/azure.md

@@ -10,15 +10,24 @@ Account access information is stored as a cloud credential. Cloud credentials ar
 - **Network** configures the networking used in your cluster.
 - **Instance** customizes your VM configuration.
 
-:::note
+  :::note
 
-If using a VNet in a different Resource Group than the VMs, the VNet name should be prefixed with the Resource Group name. For example, `<resource group>:<vnet>`.
+  If using a VNet in a different Resource Group than the VMs, the VNet name should be prefixed with the Resource Group name. For example, `<resource group>:<vnet>`.
 
-:::
+  :::
 
 The [Docker daemon](https://docs.docker.com/engine/docker-overview/#the-docker-daemon) configuration options include:
 
 - **Labels:** For information on labels, refer to the [Docker object label documentation.](https://docs.docker.com/config/labels-custom-metadata/)
 - **Docker Engine Install URL:** Determines what Docker version will be installed on the instance.
+
+  :::note
+
+  If you're provisioning Red Hat Enterprise Linux (RHEL) or CentOS nodes, leave the **Docker Install URL** field as the default value, or select **none**. This will bypass a check for Docker installation, as Docker is already installed on these node types. 
+
+  If you set **Docker Install URL** to a value other than the default or **none**, you might see an error message such as the following: `Error creating machine: RHEL ssh command error: command: sudo -E yum install -y curl err: exit status 1 output: Updating Subscription Management repositories.`
+  
+  :::
+
 - **Registry mirrors:** Docker Registry mirror to be used by the Docker daemon
 - **Other advanced options:** Refer to the [Docker daemon option reference](https://docs.docker.com/engine/reference/commandline/dockerd/)

versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/nutanix.md

@@ -54,3 +54,13 @@ To make use of cloud-init initialization, paste a cloud config using valid YAML
 Note that cloud-init based network configuration is not recommended and only supported via user data `runcmd` rather than by NoCloud or other network configuration datasources.
 
 Nutanix IP Address Management (IPAM) or another DHCP service is recommended.
+
+## Engine Options
+
+In the **Engine Options** section of the node template, you can configure the container daemon. You may want to specify the container version or a container image registry mirror.
+
+:::note
+If you're provisioning Red Hat Enterprise Linux (RHEL) or CentOS nodes, leave the **Docker Install URL** field as the default value, or select **none**. This will bypass a check for Docker installation, as Docker is already installed on these node types. 
+
+If you set **Docker Install URL** to a value other than the default or **none**, you might see an error message such as the following: `Error creating machine: RHEL ssh command error: command: sudo -E yum install -y curl err: exit status 1 output: Updating Subscription Management repositories.`
+:::

versioned_docs/version-2.6/reference-guides/cluster-configuration/downstream-cluster-configuration/node-template-configuration/vsphere.md

@@ -83,3 +83,13 @@ Custom attributes are a legacy feature that will eventually be removed from vSph
 To make use of cloud-init initialization, create a cloud config file using valid YAML syntax and paste the file content in the the **Cloud Init** field. Refer to the [cloud-init documentation.](https://cloudinit.readthedocs.io/en/latest/topics/examples.html) for a commented set of examples of supported cloud config directives.
 
 Note that cloud-init is not supported when using the ISO creation method.
+
+## Engine Options
+
+In the **Engine Options** section of the node template, you can configure the container daemon. You may want to specify the container version or a container image registry mirror.
+
+:::note
+If you're provisioning Red Hat Enterprise Linux (RHEL) or CentOS nodes, leave the **Docker Install URL** field as the default value, or select **none**. This will bypass a check for Docker installation, as Docker is already installed on these node types. 
+
+If you set **Docker Install URL** to a value other than the default or **none**, you might see an error message such as the following: `Error creating machine: RHEL ssh command error: command: sudo -E yum install -y curl err: exit status 1 output: Updating Subscription Management repositories.`
+:::