message

DONTUSE_setup-cri.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# script that runs 
+# https://kubernetes.io/docs/setup/production-environment/container-runtime
+
+echo this script is now deprecated and provided for compatibility reasons only. 
+echo run setup-container.sh instead. 
+echo after running setup-container.sh, use setup-kubetools.sh to install the kubernetes tools
+echo this script will now stop
+echo use Ctrl-C to stop it now
+sleep 30
+exit
+
+yum install -y vim yum-utils device-mapper-persistent-data lvm2
+yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
+
+# notice that only verified versions of Docker may be installed
+# verify the documentation to check if a more recent version is available
+
+yum install -y docker-ce
+[ ! -d /etc/docker ] && mkdir /etc/docker
+
+cat > /etc/docker/daemon.json <<EOF
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2",
+  "storage-opts": [
+    "overlay2.override_kernel_check=true"
+  ]
+}
+EOF
+
+mkdir -p /etc/systemd/system/docker.service.d
+
+systemctl daemon-reload
+systemctl restart docker
+systemctl enable docker
+
+systemctl disable --now firewalld

DONTUSE_setup-docker.sh

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+#!/bin/bash
+# script that runs 
+# https://kubernetes.io/docs/setup/production-environment/container-runtime
+
+echo this script is now deprecated and provided for compatibility reasons only. 
+echo run setup-container.sh instead. 
+echo after running setup-container.sh, use setup-kubetools.sh to install the kubernetes tools
+echo this script will now stop
+echo use Ctrl-C to stop it now
+sleep 30
+exit
+
+yum install -y vim yum-utils device-mapper-persistent-data lvm2
+yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
+
+# notice that only verified versions of Docker may be installed
+# verify the documentation to check if a more recent version is available
+
+yum install -y docker-ce
+[ ! -d /etc/docker ] && mkdir /etc/docker
+
+cat > /etc/docker/daemon.json <<EOF
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2",
+  "storage-opts": [
+    "overlay2.override_kernel_check=true"
+  ]
+}
+EOF
+
+mkdir -p /etc/systemd/system/docker.service.d
+
+systemctl daemon-reload
+systemctl restart docker
+systemctl enable docker
+
+systemctl disable --now firewalld

DONTUSE_setup-kubetools-ubuntu.sh

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+#!/bin/bash
+
+cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
+br_netfilter
+EOF
+
+cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-ip6tables = 1
+net.bridge.bridge-nf-call-iptables = 1
+EOF
+sudo sysctl --system
+sudo swapoff -a
+
+sudo apt-get update && sudo apt-get install -y apt-transport-https curl
+curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
+cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
+deb https://apt.kubernetes.io/ kubernetes-xenial main
+EOF
+sudo apt-get update
+sudo apt-get install -y kubelet kubeadm kubectl
+sudo apt-mark hold kubelet kubeadm kubectl
+
+

kubeadm-config.yaml

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+# kubeadm-config.yaml
+kind: ClusterConfiguration
+apiVersion: kubeadm.k8s.io/v1beta3
+kubernetesVersion: v1.21.0
+---
+kind: KubeletConfiguration
+apiVersion: kubelet.config.k8s.io/v1beta1
+cgroupDriver: syst

setup-kubetools-new.sh

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+#!/bin/bash
+# kubeadm installation instructions as on
+# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
+
+# this script supports centos 7 and Ubuntu 20.04 only
+# run this script with sudo
+
+if ! [ $USER = root ]
+then
+	echo run this script with sudo
+	exit 3
+fi
+
+# setting MYOS variable
+MYOS=$(hostnamectl | awk '/Operating/ { print $3 }')
+OSVERSION=$(hostnamectl | awk '/Operating/ { print $4 }')
+
+##### CentOS 7 config
+if [ $MYOS = "CentOS" ]
+then
+	echo RUNNING CENTOS CONFIG
+	cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
+[kubernetes]
+name=Kubernetes
+baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
+enabled=1
+gpgcheck=1
+repo_gpgcheck=1
+gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
+exclude=kubelet kubeadm kubectl
+EOF
+
+	# Set SELinux in permissive mode (effectively disabling it)
+	setenforce 0
+	sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
+
+	# disable swap (assuming that the name is /dev/centos/swap
+	sed -i 's/^\/dev\/mapper\/centos-swap/#\/dev\/mapper\/centos-swap/' /etc/fstab
+	swapoff /dev/mapper/centos-swap
+
+	yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
+
+	systemctl enable --now kubelet
+fi
+
+if [ $MYOS = "Ubuntu" ]
+then
+	
+	sudo apt-get update
+	sudo apt-get install -y apt-transport-https ca-certificates curl
+	sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
+	echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+	sudo apt-get update
+	sudo apt-get install -y kubelet kubeadm kubectl
+	sudo apt-mark hold kubelet kubeadm kubectl
+	swapoff /swapfile
+	
+	sed -i 's/swapfile/#swapfile/' /etc/fstab
+
+	
+fi
+
+# Set iptables bridging
+cat <<EOF >  /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-ip6tables = 1
+net.bridge.bridge-nf-call-iptables = 1
+EOF
+sysctl --system