#!/bin/bash
MASTER_HOSTNAME=("master01" "master02" "master03")
MASTER_NODE_IP=("" "" "")
### kubelet version upgrade node drain option
NODE_DRAIN="no"
###################
### MASTER NODE ###
###################
if [ "${HOSTNAME}" == "${MASTER_HOSTNAME[0]}" ] || [ "${HOSTNAME}" == "${MASTER_HOSTNAME[1]}" ] || [ "${HOSTNAME}" == "${MASTER_HOSTNAME[2]}" ]; then
CURRENT_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}' | awk -F '.' {'print $2'}`
CURRENT_INSTALL_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}'`
TASK_VERSION=`expr $CURRENT_VERSION + 1`
UPGRADE_VERSION="1.${TASK_VERSION}"
### kubeadm upgrade ###
INSTALL_KUBEADM_VERSION=`sudo yum --showduplicates list kubeadm --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
sudo yum install -y kubeadm-${INSTALL_KUBEADM_VERSION} --disableexcludes=kubernetes
UPGRADE_CURRENT_INSTALL_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}'`
UPGRADE_CURRENT_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}' | awk -F '.' {'print $2'}`
sudo kubeadm version
if [ ${UPGRADE_CURRENT_VERSION} -eq 16 ]; then
sudo kubeadm upgrade plan v${UPGRADE_CURRNET_INSTALL_VERSION} --ignore-preflight-errors=CoreDNSUnsupportedPlugins
else
sudo kubeadm upgrade plan v${UPGRADE_CURRNET_INSTALL_VERSION}
fi
echo "##########################################################"
echo "### Will you proceed with the Kubernetes UPGRADE Task? ###"
echo "##########################################################"
echo ""
echo "### Type "yes" if you are going to work ###"
echo ""
echo -n "yes or no : " && read UPGRADE_CHECK
if [ "${UPGRADE_CHECK}" != "yes" ]; then
echo ""
echo "#################################"
echo "### Plz Upgrade Version Check ###"
echo "#################################"
sleep 2
echo ""
echo "STOP The \"kubernetes Task\" KUBEADM Package RESET"
echo ""
sleep 2
echo "### kubeadm remove ${INSTALL_KUBEADM_VERSION} ###"
echo ""
sleep 2
sudo yum remove -y kubeadm-${INSTALL_KUBEADM_VERSION} --disableexcludes=kubernetes
echo ""
echo "### kubeadm install Current Version"
echo ""
sleep 2
sudo yum install -y kubeadm-${CURRENT_INSTALL_VERSION} --disableexcludes=kubernetes
exit 0
fi
###########################
### Master Node Upgrade ###
###########################
if [ "${HOSTNAME}" == "${MASTER_HOSTNAME[0]}" ]; then
if [ ${UPGRADE_CURRENT_VERSION} -lt 15 ]; then
sudo kubeadm upgrade apply v${UPGRADE_CURRENT_INSTALL_VERSION}
elif [ ${UPGRADE_CURRENT_VERSION} -ge 15 ]; then
if [ ${UPGRADE_CURRENT_VERSION} -eq 16 ]; then
sudo kubeadm upgrade apply v${UPGRADE_CURRENT_INSTALL_VERSION} --certificate-renewal=false --ignore-preflight-errors=CoreDNSUnsupportedPlugins
else
sudo kubeadm upgrade apply v${UPGRADE_CURRENT_INSTALL_VERSION} --certificate-renewal=false
fi
fi
elif [ "${HOSTNAME}" == "${MASTER_HOSTNAME[1]}" ] || [ "${HOSTNAME}" == "${MASTER_HOSTNAME[2]}" ] ; then
if [ ${UPGRADE_CURRENT_VERSION} -lt 15 ]; then
sudo kubeadm upgrade node experimental-control-plane
elif [ ${UPGRADE_CURRENT_VERSION} -eq 15 ]; then
sudo kubeadm upgrade node --certificate-renewal=false experimental-control-plane
elif [ ${UPGRADE_CURRENT_VERSION} -ge 16 ]; then
sudo kubeadm upgrade node --certificate-renewal=false
fi
fi
##################
### Node Drain ###
##################
if [ ${NODE_DRAIN} == "yes" ]; then
kubectl drain ${HOSTNAME} --ignore-daemonsets --delete-local-data
fi
################################
### kubelet, kubectl upgrade ###
################################
INSTALL_KUBECTL_VERSION=`sudo yum --showduplicates list kubectl --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
INSTALL_KUBELET_VERSION=`sudo yum --showduplicates list kubelet --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
sudo yum install -y kubectl-${INSTALL_KUBECTL_VERSION} --disableexcludes=kubernetes
sudo yum install -y kubelet-${INSTALL_KUBELET_VERSION} --disableexcludes=kubernetes
sudo systemctl daemon-reload
sudo systemctl restart kubelet
##################
### Node Drain ###
##################
if [ ${NODE_DRAIN} == "yes" ]; then
kubectl uncordon ${HOSTNAME}
fi
###################
### WORKER NODE ###
###################
elif [ "${HOSTNAME}" != "${MASTER_HOSTNAME[0]}" ] || [ "${HOSTNAME}" != "${MASTER_HOSTNAME[1]}" ] || [ "${HOSTNAME}" != "${MASTER_HOSTNAME[2]}" ]; then
CURRENT_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}' | awk -F '.' {'print $2'}`
TASK_VERSION=`expr $CURRENT_VERSION + 1`
UPGRADE_VERSION="1.${TASK_VERSION}"
CURRENT_INSTALL_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}'`
### kubeadm upgrade ###
INSTALL_KUBEADM_VERSION=`sudo yum --showduplicates list kubeadm --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
sudo yum install -y kubeadm-${INSTALL_KUBEADM_VERSION} --disableexcludes=kubernetes
echo "##########################################################"
echo "### Will you proceed with the Kubernetes UPGRADE Task? ###"
echo "##########################################################"
echo ""
echo "### Type "yes" if you are going to work ###"
echo ""
echo -n "yes or or : " && read UPGRADE_CHECK
if [ "${UPGRADE_CHECK}" != "yes" ]; then
echo ""
echo "#################################"
echo "### Plz Upgrade Version Check ###"
echo "#################################"
sleep 2
echo ""
echo "STOP The \"kubernetes Task\" KUBEADM Package RESET"
echo ""
sleep 2
echo "### kubeadm remove ${INSTALL_KUBEADM_VERSION} ###"
echo ""
sleep 2
sudo yum remove -y kubeadm-${INSTALL_KUBEADM_VERSION} --disableexcludes=kubernetes
echo ""
echo "### kubeadm install Current Version"
echo ""
sleep 2
sudo yum install -y kubeadm-${CURRENT_INSTALL_VERSION} --disableexcludes=kubernetes
exit 0
fi
KUBELET_CONFIG_VERSION=`sudo rpm -qa | grep kubeadm | awk -F '-' '{print $2}'`
sudo kubeadm upgrade node
### kubelet, kubectl upgrade ###
INSTALL_KUBECTL_VERSION=`sudo yum --showduplicates list kubectl --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
INSTALL_KUBELET_VERSION=`sudo yum --showduplicates list kubelet --disableexcludes=kubernetes | grep ${UPGRADE_VERSION} | awk {'print $2'} | sort -t '.' -k3 -n | uniq | tail -n 1`
sudo yum install -y kubectl-${INSTALL_KUBECTL_VERSION} --disableexcludes=kubernetes
sudo yum install -y kubelet-${INSTALL_KUBELET_VERSION} --disableexcludes=kubernetes
sudo systemctl daemon-reload
sudo systemctl restart kubelet
fi