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icebob/k3s_helm_install.sh

Last active August 15, 2025 08:47
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K3S + Helm installing
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k3s_helm_install.sh
# Install K3S
curl -sfL https://get.k3s.io | sh -
# Symlink k3s.yaml
mkdir $HOME/.kube
sudo chmod 755 /etc/rancher/k3s/k3s.yaml
ln -s /etc/rancher/k3s/k3s.yaml $HOME/.kube/config
# Check K3S
kubectl get pods -n kube-system
# 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
# Link Helm with Tiller
kubectl -n kube-system create serviceaccount tiller
kubectl create clusterrolebinding tiller --clusterrole cluster-admin --serviceaccount=kube-system:tiller
helm init --service-account tiller
# 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 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"
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