Create common.sh

Author: legah2045

kubeadm/common.sh

@@ -0,0 +1,100 @@
+#!/bin/bash
+#i1) Switch to root user [ sudo -i]
+
+sudo hostnamectl set-hostname  node1
+
+#2) Disable swap & add kernel settings
+
+swapoff -a
+sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
+
+
+#3) Add  kernel settings & Enable IP tables(CNI Prerequisites)
+
+cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
+overlay
+br_netfilter
+EOF
+
+modprobe overlay
+modprobe br_netfilter
+
+cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-iptables  = 1
+net.bridge.bridge-nf-call-ip6tables = 1
+net.ipv4.ip_forward                 = 1
+EOF
+
+sysctl --system
+
+#4) Install containerd run time
+
+#To install containerd, first install its dependencies.
+
+apt-get update -y
+apt-get install ca-certificates curl gnupg lsb-release -y
+
+#Note: We are not installing Docker Here.Since containerd.io package is part of docker apt repositories hence we added docker repository & it's key to download and install containerd.
+# Add Docker’s official GPG key:
+sudo mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+
+#Use follwing command to set up the repository:
+
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# Install containerd
+
+apt-get update -y
+apt-get install containerd.io -y
+
+# Generate default configuration file for containerd
+
+#Note: Containerd uses a configuration file located in /etc/containerd/config.toml for specifying daemon level options.
+#The default configuration can be generated via below command.
+
+containerd config default > /etc/containerd/config.toml
+
+# Run following command to update configure cgroup as systemd for contianerd.
+
+sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml
+
+# Restart and enable containerd service
+
+systemctl restart containerd
+systemctl enable containerd
+
+5) Installing kubeadm, kubelet and kubectl
+
+# Update the apt package index and install packages needed to use the Kubernetes apt repository:
+
+apt-get update
+apt-get install -y apt-transport-https ca-certificates curl
+
+# Download the Google Cloud public signing key:
+
+curl -fsSLo /etc/apt/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
+
+# Add the Kubernetes apt repository:
+
+echo "deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+
+# Update apt package index, install kubelet, kubeadm and kubectl, and pin their version:
+
+apt-get update
+apt-get install -y kubelet kubeadm kubectl
+
+# apt-mark hold will prevent the package from being automatically upgraded or removed.
+
+apt-mark hold kubelet kubeadm kubectl
+
+# Enable and start kubelet service
+
+systemctl daemon-reload
+systemctl start kubelet
+systemctl enable kubelet.service
+
+sudo kubeadm join 10.0.0.6:6443 --token xmzufh.e0nu3kb5ohijfxyh \
+        --discovery-token-ca-cert-hash sha256:579b6a53bd00c8483f5150b9fb521b6431fc38b1ac716b8b9a5f668928a93771