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Yesveer/kubedum.sh

Last active September 22, 2025 08:17
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kubedum.sh
#!/bin/bash
set -x
export DEBIAN_FRONTEND=noninteractive
#Function to Install general dependencies
installGeneralDependencies()
{
sudo apt-get update && sudo apt upgrade -y
sudo apt-get install -y apt-transport-https ca-certificates curl gnupg wget gpg
}
#Function to Install Containerd
installContainerd()
{
# Install config.toml
curl -L --progress-bar -o containerd-config.toml https://gist.githubusercontent.com/oradwell/31ef858de3ca43addef68ff971f459c2/raw/5099df007eb717a11825c3890a0517892fa12dbf/containerd-config.toml
sudo mkdir /etc/containerd
sudo mv containerd-config.toml /etc/containerd/config.toml
curl -L --progress-bar -o containerd-1.6.14-linux-amd64.tar.gz https://github.com/containerd/containerd/releases/download/v1.6.14/containerd-1.6.14-linux-amd64.tar.gz
# Extract the binaries
sudo tar Cxzvf /usr/local containerd-1.6.14-linux-amd64.tar.gz
# Install containerd as a service
sudo curl -L --progress-bar -o /etc/systemd/system/containerd.service https://raw.githubusercontent.com/containerd/containerd/main/containerd.service
sudo systemctl daemon-reload
sudo systemctl enable --now containerd
}
#Function to Install runc
installRunc()
{
curl -L --progress-bar -o runc.amd64 https://github.com/opencontainers/runc/releases/download/v1.1.3/runc.amd64
sudo install -m 755 runc.amd64 /usr/local/sbin/runc
}
#Function to Install CNI network plugins
installCniNetworkPlugins()
{
curl -L --progress-bar -o cni-plugins-linux-amd64-v1.1.1.tgz https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
sudo mkdir -p /opt/cni/bin
sudo tar Cxzvf /opt/cni/bin cni-plugins-linux-amd64-v1.1.1.tgz
}
#Function to forward IPv4 and let iptables see bridged network traffic
forwardIpv4()
{
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF
sudo modprobe -a overlay br_netfilter
# sysctl params required by setup, params persist across reboots
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
# Apply sysctl params without reboot
sudo sysctl --system
}
#Function to Install kubeadm, kubelet & kubectl
installKube()
{
# # Add Kubernetes GPG key
curl -L --progress-bar https://pkgs.k8s.io/core:/stable:/v1.32/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
sudo chmod 644 /etc/apt/keyrings/kubernetes-apt-keyring.gpg # allow unprivileged APT programs to read this keyring
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.32/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo chmod 644 /etc/apt/sources.list.d/kubernetes.list # helps tools such as command-not-found to work correctly
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
# # Prevent them from being updated automatically
sudo apt-mark hold kubelet kubeadm kubectl
}
#Function to ensure swap is disabled
swapDisable()
{
# See if swap is enabled
swapon --show
# Turn off swap
sudo swapoff -a
# Disable swap completely
sudo sed -i -e '/swap/d' /etc/fstab
}
#Function to create the cluster using kubeadm
createCluster()
{
sudo kubeadm init --pod-network-cidr=10.244.0.0/16
}
#Function to configure kubectl
configureKubectl()
{
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
}
#Function to untaint node
nodeUntain()
{
kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl taint nodes --all node-role.kubernetes.io/control-plane-
}
#Function to Install a CNI plugin
installCniplugin()
{
kubectl apply -f https://raw.githubusercontent.com/projectcalico/calico/v3.27.2/manifests/calico.yaml
}
#Function to Install helm
installHelm()
{
curl -L --progress-bar https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
}
#Function to Install a CSI driver
installCsiDriver()
{
# Add openebs repo to helm
helm repo add openebs https://openebs.github.io/charts
helm install openebs openebs/openebs --set localprovisioner.hostpathClass.isDefaultClass=true --namespace=openebs --create-namespace
}
# Function to install make
installMake() {
sudo apt install make
# Fix to many files open
sudo sysctl -w fs.inotify.max_user_watches=2099999999
sudo sysctl -w fs.inotify.max_user_instances=2099999999
sudo sysctl -w fs.inotify.max_queued_events=2099999999
}
echo "Installing general dependencies"
installGeneralDependencies
echo "Installing Containerd"
installContainerd
echo "Installing runc"
installRunc
echo "Installing CNI network plugins"
installCniNetworkPlugins
echo "Forwarding IPv4 and let iptables see bridged network traffic"
forwardIpv4
echo "Installing kubeadm, kubelet & kubectl"
installKube
echo "Ensuring swap is disabled"
swapDisable
echo "Creating the cluster using kubeadm"
createCluster
echo "Configuring Kubectl"
configureKubectl
echo "Untaint master nodes"
nodeUntain
echo "Installing CNI plugins"
installCniplugin
echo "Installing Helm"
installHelm
echo "Installing OpenEBS SC with Default Configuration"
installCsiDriver
echo "Install make Tool"
installMake
echo "Ready To Go Guys"
echo "Happy Hacking "
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