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Cluster Upgrades:
=================
primary master:
---------------
VERSION=1.20.2
apt-get update
apt-get install -y --allow-change-held-packages "kubeadm=$VERSION-00" && apt-mark hold kubeadm
kubeadm version
kubeadm upgrade plan
kubectl drain $(hostname) --ignore-daemonsets --delete-local-data
kubeadm upgrade apply "v$VERSION"
sed "s/^kubernetesVersion: .*$/kubernetesVersion: $VERSION/" -i /etc/kubernetes/kubeadm.config
apt-get update && apt-get install -y --allow-change-held-packages "kubelet=$VERSION-00" "kubectl=$VERSION-00" && apt-mark hold kubelet kubectl
// security updates + reboot ?
kubectl uncordon $(hostname)
secondary master:
-----------------
VERSION=1.20.2
apt-get update
apt-get install -y --allow-change-held-packages "kubeadm=$VERSION-00" && apt-mark hold kubeadm
kubectl drain $(hostname) --ignore-daemonsets --delete-local-data
kubeadm upgrade node
apt-mark unhold kubelet kubectl && apt-get update && apt-get install -y kubelet="$VERSION-00" "kubectl=$VERSION-00" && apt-mark hold kubelet kubectl
// security updates + reboot ?
kubectl uncordon $(hostname)
worker nodes:
-------------
VERSION=1.20.2
apt-get update
apt-get install -y --allow-change-held-packages "kubeadm=$VERSION-00" && apt-mark hold kubeadm
@primary master: kubectl drain <node> --ignore-daemonsets --delete-local-data
kubeadm upgrade node
apt-mark unhold kubelet kubectl && apt-get update && apt-get install -y kubelet="$VERSION-00" "kubectl=$VERSION-00" && apt-mark hold kubelet kubectl
// security updates + reboot ?
@primary master: kubectl uncordon <node>
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