Cluster deploy

Create rancher-cluster.yml file, containing all the nodes, following the official example : https://rancher.com/docs/rancher/v2.x/en/installation/ha/kubernetes-rke/

rke up --config ./rancher-cluster.yml

Install helm and run all prerequisites for installing it: https://rancher.com/docs/rancher/v2.x/en/installation/ha/helm-rancher/

kubectl -n kube-system create serviceaccount tiller

kubectl create clusterrolebinding tiller \
  --clusterrole=cluster-admin \
  --serviceaccount=kube-system:tiller

helm init --service-account tiller

Install rancher

helm install rancher-latest/rancher \
  --name rancher \
  --namespace cattle-system \
  --set hostname=<rancher.url>

Backup & rollback cluster: https://rancher.com/docs/rke/latest/en/etcd-snapshots/

rke etcd snapshot-save --config cluster.yml --name snapshot-name 
rke etcd snapshot-restore --config cluster.yml --name snapshot-name

Additional step, fix rancher ingress route with tls.source=letsEncrypt by running:

kubectl edit ingress/<rancher.ingress> -n cattle-system