Installation of NEVIS

Introduction

I decided to install NEVIS inside a kubernetes cluster.

Installation of kubernetes

sudo dnf install kubernetes kubernetes-kubeadm kubernetes-node kubernetes-client

Open firewall ports 6443, 10250

sudo systemctl enable kubelet.service
sudo systemctl enable containerd
sudo systemctl start containerd
sudo swapoff -a
sudo dnf install iptables iproute-tc

sudo cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF


sudo modprobe overlay
sudo modprobe br_netfilter

# sysctl params required by setup, params persist across reboots
sudo cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF


sudo sysctl --system

sudo systemctl enable --now kubelet

sudo kubeadm init

Kubelet configuration

using-kubernetes-kubelet

Accessing the cluster as normal user

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

Useful commands

ss -tlnp | grep 6443
kubectl config use-context
kubectl config view
kubectl cluster-info
kubectl get pods --all-namespaces

Additional .conf files:

/etc/systemd/system/kubelet.service.d/