From 9eb937a5ceb95c6c5241ed10e57b566a58f002b7 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sun, 7 Feb 2021 00:47:09 +0100
Subject: add simple kubernetes cluster upgrade doc

---
 roles/kubernetes/kubeadm/upgrade | 57 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 roles/kubernetes/kubeadm/upgrade

(limited to 'roles/kubernetes/kubeadm/upgrade')

diff --git a/roles/kubernetes/kubeadm/upgrade b/roles/kubernetes/kubeadm/upgrade
new file mode 100644
index 00000000..dc0a360a
--- /dev/null
+++ b/roles/kubernetes/kubeadm/upgrade
@@ -0,0 +1,57 @@
+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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