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notes.md

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+Requirements:
+
+- User with access to sudo
+- Only Debian based devices
+- Use vars to target specific kubeadm/let/ctl version
+- DNS name must match the name of the node when using `kubectl get nodes` command
+- Host/Client that will execute this script requires to have `kubectl` configured to use the targeted kubernetes cluster. 
+- https://docs.ansible.com/ansible/latest/collections/kubernetes/core/docsite/kubernetes_scenarios/k8s_intro.html | ansible-galaxy collection install kubernetes.core [0]
+
+[0] pacman -S python-kubernetes
+https://stackoverflow.com/questions/60866755/ansible-k8s-module-failed-to-import-the-required-python-library-openshift-on
+
+
+Order:
+
+- Update repositories [-3]
+- Check available versions to upgrade to and update the config accordingly [-2]
+- Check if applied CRD work on the desired Kubernetes version [-1]
+- Backup (if available, as per the moment manual since it's not a main concern) [0]
+- Upgrade Kubeadm [1]
+- Call upgrade [2]
+- Drain node [3]
+- Update kubelet/kubectl versions [4]
+- Reboot services [5]
+- Upgrade system cause one needs it from time to type [6]
+- Uncordon node [7]
+
+----- Done with all hosts
+- Upgrade CNI
+
+
+[-3]
+https://kubernetes.io/blog/2023/08/15/pkgs-k8s-io-introduction/
+
+[-2]
+apt update
+apt-cache madison kubeadm  | head -n 5
+
+[-1] (This is mine. comparing to kubernetes 1.28.5)
+- [x] Calico v3.26.3 (v3.26.4 available)
+- [x] Istio 1.18.2 (v1.20 available)
+- [?] MetalLb v0.13.10 (v0.13.12 available) *Didn't find anything regarding the matter, so going to assume yes and see what happens. 
+- [x] CertManager v1.13.1 (v1.13.3 available)
+
+[0]
+Proxmox stuff/VMs
+
+[1]
+apt-mark unhold kubeadm && \
+apt-get update && apt-get install -y kubeadm='1.28.x-*' && \
+apt-mark hold kubeadm
+
+[2]
+sudo kubeadm upgrade node
+
+[3]
+kubectl drain $NODE
+
+[4]
+apt-mark unhold kubelet kubectl && \
+apt-get update && apt-get install -y kubelet='1.28.x-*' kubectl='1.28.x-*' && \
+apt-mark hold kubelet kubectl
+
+[5]
+sudo systemctl daemon-reload
+sudo systemctl restart kubelet
+
+[6]
+usual apt-get update > upgrade > reboot 
+
+[7]
+kubectl uncordon <node-to-uncordon>
+