SOLUTION.MD

drain master node

kubectl  drain {master node name}  --ignore-daemonsets

check kubeadm version

kubeadm version

check kubelet version

kubelet --version

install update packets

apt update
apt-mark unhold kubeadm

apt install kubeadm=1.26.0-00  -y
apt-mark hold kubeadm

update control plane

kubeadm upgrade plan

kubeadm upgrade apply v1.26.0

update kubelet and kubectl

apt-mark unhold kubelet kubectl
apt install kubelet=1.26.0-00   kubectl=1.26.0-00
apt-mark hold kubelet kubectl

service kubelet restart
service kubelet status

uncordon master node

kubectl  uncordon {master node name}

drain node

drain {worker node } --ignore-daemonsets

ssh to worker node

update kubeadm

apt update
apt-mark unhold kubeadm
apt install kubeadm=1.26.0-00
apt-mark hold kubeadm
kubeadm upgrade node

update kubelet and kubectl

apt-mark unhold kubectl kubelet
apt install kubelet=1.26.0-00  kubectl=1.26.0-00 -y
apt-mark hold kubectl kubelet
service kubelet restart
service kubelet status

uncordon worker node

kubectl  uncordon {worker  node name}

check nodes

kubectl get no