===== Kubernetes >= 1.24 =====
====Install Packages====
===cri-o====
https://cri-o.io/
Install cri-o packages (on Ubuntu 20.04 LTS):
#!/bin/bash
#author: Thomas Roehm
#version: 1.0
export VERSION=1.25 #must match k8s version
export OS="xUbuntu_20.04" #must match os version
echo 'deb http://deb.debian.org/debian buster-backports main' > /etc/apt/sources.list.d/backports.list
apt update
apt install -y -t buster-backports libseccomp2 || apt update -y -t buster-backports libseccomp2
echo ""
echo "deb [signed-by=/usr/share/keyrings/libcontainers-archive-keyring.gpg] https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
echo "deb [signed-by=/usr/share/keyrings/libcontainers-crio-archive-keyring.gpg] https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VERSION/$OS/ /" > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable:cri-o:$VERSION.list
echo ""
echo "Install repositories"
echo ""
mkdir -p /usr/share/keyrings
curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/$OS/Release.key | gpg --dearmor -o /usr/share/keyrings/libcontainers-archive-keyring.gpg
curl -L https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VERSION/$OS/Release.key | gpg --dearmor -o /usr/share/keyrings/libcontainers-crio-archive-keyring.gpg
echo ""
echo "Install cri-o"
echo ""
apt-get update
apt-get install cri-o cri-o-runc cri-tools
systemctl enable crio.service
systemctl start crio.service
systemctl status crio.service
=== kubernetes ===
Install kubernetes packages (on Ubuntu 20.04 LTS):
#!/bin/bash
#author: tmade
#version: 1.0
RELEASE=$(lsb_release -cs)
echo ""
echo "check k8s installation:"
dpkg -l |grep kube*
KUBEINSTALL=$(echo $?)
echo ""
if [ ${KUBEINSTALL} -eq "0" ]
then
echo "k8s already installed"
else
echo "Installing k8s repository..."
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
#echo "deb http://apt.kubernetes.io/ kubernetes-${RELEASE} main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
fi
echo ""
apt-get update
apt-mark unhold kubernetes-cni kubeadm kubelet kubectl
echo ""
echo "Up- or downgrade k8s packages"
echo ""
apt-cache policy kubeadm | head -n 30
echo ""
read -p "Please enter the k8s version you want to install (e. g. \"1.16.4-00\"): " VERSION
echo "Version: \"${VERSION}\" will be installed!"
echo ""
apt-get install -y kubeadm=${VERSION} kubelet=${VERSION} kubectl=${VERSION} --allow-downgrades
echo ""
apt-mark hold kubelet kubeadm kubectl
echo ""
echo "k8s packages are installed!"
echo ""
====Setup====
Setup k8s with cri-o (has to be installed previously):
#!/bin/bash
#author: Thomas Roehm
#version: 1.0
USER="kubernetes"
HOME="/home/${USER}"
KUBEHOME="${HOME}/.kube"
#CIDR="10.0.0.5"
PODNETWORKADDON="192.168.0.0/16"
echo ""
echo "Setup -------------k8s--------------"
echo ""
su - kubernetes -c "kubectl version 2> /dev/null"
echo ""
su - kubernetes -c "read -s -n 1 -p \"Press any key to continue . . .\""
apt-get update
apt-cache policy kubeadm | head -n 30
#apt-cache policy docker-ce
echo ""
read -p "Please enter k8s version you want to install (e. g. \"1.16.4-00\"): " VERSION
echo "Version: \"$VERSION\" will be installed!"
apt-mark unhold kubernetes-cni kubeadm kubelet kubectl docker-ce
#apt-mark unhold kubernetes-cni kubeadm kubelet kubectl docker-ce
apt-get install -y kubeadm=${VERSION} kubelet=${VERSION} kubectl=${VERSION}
echo ""
read -p "Please enter your CIDR management ip-adress for your master (e. g. \"10.6.33.10\"): " CIDR
echo ""
echo "ip set to: \"$CIDR\""
echo ""
kubeadm init --apiserver-advertise-address=${CIDR} --pod-network-cidr=${PODNETWORKADDON} --cri-socket=unix:///var/run/crio/crio.sock
echo ""
read -s -n 1 -p "Press any key to continue . . ."
echo ""
if [ -e ${KUBEHOME} ]
then
echo "\"${KUBEHOME}\" exists"
read -p "Do you want to delete \"${KUBEHOME}\"? Please enter y (proceed) or n (stop): " PROCEED
echo "You´ve entered: \"$PROCEED\""
echo ""
if [ $PROCEED = y ]
then
rm -r ${KUBEHOME}
echo "\"${KUBEHOME}\" deleted!"
echo ""
read -s -n 1 -p "Press any key to continue . . ."
else
exit 1
fi
fi
su - ${USER} -c "mkdir -p $HOME/.kube"
su - ${USER} -c "sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config"
chown -R ${USER}:${USER} $HOME/.kube
echo ""
echo "home \"$HOME/.kube\" copied!"
echo ""
read -s -n 1 -p "Press any key to continue . . ."
#calico pod-network-addon
kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.24.3/manifests/tigera-operator.yaml
kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.24.3/manifests/custom-resources.yaml
echo "calico pod network add on has been deployed"
echo ""
read -s -n 1 -p "Press any key to continue . . ."
apt-mark hold kubernetes-cni kubeadm kubelet kubectl docker-ce
echo ""
while [ -z $SCHEDULE ] ;
do
read -p "Do you want to schedule pods on your master? Please enter \"y\" or \"n\": " SCHEDULE
echo "Please enter \"y\" or \"n\""
done
echo ""
echo "You´ve entered: \"$SCHEDULE\""
echo ""
if [ $SCHEDULE = y ]
then
kubectl taint node $(hostname) node-role.kubernetes.io/control-plane:NoSchedule
fi
echo ""
echo "Status - please press \"ctrl + c\" when all pods are running"
echo ""
watch kubectl get pods -A -o wide