82-rancher.sh

###############################################################
# Using Rancher For Creating And Managing Kubernetes Clusters #
# https://youtu.be/LK6KbAlQRIg                                #
###############################################################

#########
# Setup #
#########

# Create a Kubernetes cluster with NGINX Ingress

kubectl apply --validate=false \
    --filename https://github.com/jetstack/cert-manager/releases/download/v1.0.4/cert-manager.crds.yaml

helm repo add jetstack \
    https://charts.jetstack.io

helm repo update

helm install \
    cert-manager jetstack/cert-manager \
    --create-namespace \
    --namespace cert-manager \
    --version v1.0.4 \
    --wait

# Replace `[...]` with your email
export EMAIL=[...]

# If NOT EKS
export INGRESS_HOST=$(kubectl \
    --namespace ingress-nginx \
    get svc ingress-nginx-controller \
    --output jsonpath="{.status.loadBalancer.ingress[0].ip}")

# If EKS
export INGRESS_HOSTNAME=$(kubectl \
    --namespace ingress-nginx \
    get svc ingress-nginx-controller \
    --output jsonpath="{.status.loadBalancer.ingress[0].hostname}")

# If EKS
export INGRESS_HOST=$(\
    dig +short $INGRESS_HOSTNAME)

echo $INGRESS_HOST

# Repeat the `export` commands if the output is empty

# If the output contains more than one IP, wait for a while longer, and repeat the `export` commands.

# If the output continues having more than one IP, choose one of them and execute `export INGRESS_HOST=[...]` with `[...]` being the selected IP.

export RANCHER_ADDR=rancher.$INGRESS_HOST.nip.io

##################################################
# Installing Rancher inside a Kubernetes cluster #
##################################################

helm repo add rancher \
    https://releases.rancher.com/server-charts/stable

helm repo update

helm upgrade --install \
    rancher rancher/rancher \
    --namespace cattle-system \
    --create-namespace \
    --set hostname=$RANCHER_ADDR \
    --set ingress.tls.source=letsEncrypt \
    --set letsEncrypt.email=$EMAIL \
    --wait

echo https://$RANCHER_ADDR

# Open it in your favorite browser

#############################
# Exploring the new cluster #
#############################

# Copy Kube config

# Feel free to use any other editor to create and open kubeconfig.yaml
vim kubeconfig.yaml

# Paste Kube config

export KUBECONFIG=$PWD/kubeconfig.yaml

kubectl get nodes

kubectl get services -A

kubectl get storageclasses

# Replace `[...]` with your DigitalOcean Token
export DO_TOKEN=[...]

echo "apiVersion: v1
kind: Secret
metadata:
  name: digitalocean
  namespace: kube-system
stringData:
  access-token: \"$DO_TOKEN\"" \
    | kubectl apply --filename -

kubectl apply \
    --filename https://raw.githubusercontent.com/digitalocean/csi-digitalocean/master/deploy/kubernetes/releases/csi-digitalocean-v2.1.1/crds.yaml

kubectl apply \
    --filename https://raw.githubusercontent.com/digitalocean/csi-digitalocean/master/deploy/kubernetes/releases/csi-digitalocean-v2.1.1/driver.yaml

kubectl apply \
    --filename https://raw.githubusercontent.com/digitalocean/csi-digitalocean/master/deploy/kubernetes/releases/csi-digitalocean-v2.1.1/snapshot-controller.yaml

kubectl get crds | grep scale