References:
Rancher recommended us to install Rancher Server using Helm.
So we will walkthrough the process of both installing helm and Rancher.
We recommend using Helm, a Kubernetes package manager, to install Rancher on multiple nodes on a dedicated Kubernetes cluster. For RKE clusters, three nodes are required to achieve a high-availability cluster.
However, in this lab we only have one HA cluster so we will use this cluster to install Rancher.
Download a binary release of the Helm client. You can use tools like homebrew, or look at the official releases page.
For more details, or for other options, see the installation guide.
https://rancher.com/docs/rancher/v2.x/en/installation/k8s-install/helm-rancher/