k3s-helm-install.sh

k3s-helm-install.sh

# Install K3S
curl -sfL https://get.k3s.io | sh -

# Copy k3s config
mkdir $HOME/.kube
sudo cp /etc/rancher/k3s/k3s.yaml $HOME/.kube/config
sudo chmod 644 $HOME/.kube/config

# Check K3S 
kubectl get pods -n kube-system

# Install Kuboard
kubectl apply -f https://addons.kuboard.cn/kuboard/kuboard-v3.yaml
# Check Kuboard
kubectl get pods -n kuboard -o wide

# Create Storage class
# kubectl apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/deploy/local-path-storage.yaml
# kubectl get storageclass

# Download & install Helm
curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get > install-helm.sh
chmod u+x install-helm.sh
./install-helm.sh
helm init
# Or: https://www.cnblogs.com/breezey/p/9398927.html
# helm init --upgrade -i registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.9.0 --service-account=tiller --stable-repo-url https://kubernetes.oss-cn-hangzhou.aliyuncs.com/charts


# Link Helm with Tiller
kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'      
helm init --service-account tiller --upgrade

# Check Helm
helm repo update
helm search postgres

# Install NATS with Helm
# https://hub.helm.sh/charts/bitnami/nats
helm install --name nats --namespace demo \
	--set auth.enabled=true,auth.user=admin,auth.password=admin1234 \
	stable/nats

# Check
helm list
kubectl get svc -n demo

# Create a port forward to NATS (blocking the terminal)
kubectl port-forward svc/nats-client 4222 -n demo

# Delete NATS
helm delete nats

# Working DNS with ufw  https://github.com/rancher/k3s/issues/24#issuecomment-515003702
# sudo ufw allow in on cni0 from 10.42.0.0/16 comment "K3s rule"

# More info:
# https://zhuanlan.zhihu.com/p/125499493/