Dallas Kubernetes Workshop - Upgrade K8s

dallas-k8s-workshop-upgrade-k8s.sh

# perform the command from this lab environment:
# https://studyk8s.club/cka-upgrade-k8s

# plan the upgrade
kubeadm upgrade plan

# upgrade the version of kubeadm
sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl gpg
mkdir -p /etc/apt/keyrings/
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo apt-get update
sudo apt-get install -y kubeadm=1.28.3-1.1

# apply and upgrade the control plane components
kubeadm upgrade apply v1.28.3