message

limitrange.yaml

@@ -1,14 +1,12 @@
 apiVersion: v1
 kind: LimitRange
 metadata:
-  name: cpulimits
+  name: mem-limit-range
 spec:
   limits:
   - default:
-      cpu: 500m
+      memory: 512Mi
     defaultRequest:
-      cpu: 500m
-    max: 
-      cpu: "1"
-    min:
-      cpu: 100m
+      memory: 256Mi
+    type: Container
+

setup-kubetools-specific-version.sh

@@ -0,0 +1,72 @@
+#!/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
+	echo RUNNING UBUNTU CONFIG
+	cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
+	br_netfilter
+EOF
+	
+	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=1.24.3-00 kubeadm=1.24.3-00 kubectl=1.24.3-00
+	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