From 2a4636568d8c33d466076bfd13ca350513c655b5 Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Thu, 29 Feb 2024 14:04:42 +0000
Subject: Add k8s-master playbook

---
 playbooks.d/k8s-master/description.txt |   1 +
 playbooks.d/k8s-master/etc/defaults    |   4 ++
 playbooks.d/k8s-master/playbook.bash   | 118 +++++++++++++++++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 playbooks.d/k8s-master/description.txt
 create mode 100644 playbooks.d/k8s-master/etc/defaults
 create mode 100644 playbooks.d/k8s-master/playbook.bash

diff --git a/playbooks.d/k8s-master/description.txt b/playbooks.d/k8s-master/description.txt
new file mode 100644
index 0000000..60693ef
--- /dev/null
+++ b/playbooks.d/k8s-master/description.txt
@@ -0,0 +1 @@
+Playbook for a Kubernetes master node
diff --git a/playbooks.d/k8s-master/etc/defaults b/playbooks.d/k8s-master/etc/defaults
new file mode 100644
index 0000000..9506887
--- /dev/null
+++ b/playbooks.d/k8s-master/etc/defaults
@@ -0,0 +1,4 @@
+pkg.containerd=containerd
+pkg.kubeadm=kubeadm
+pkg.kubectl=kubectl
+pkg.kubelet=kubelet
diff --git a/playbooks.d/k8s-master/playbook.bash b/playbooks.d/k8s-master/playbook.bash
new file mode 100644
index 0000000..fb88230
--- /dev/null
+++ b/playbooks.d/k8s-master/playbook.bash
@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+
+playbook_add() {
+	local version
+
+	version="1.29"
+
+	case "${BASHTARD_PLATFORM[key]}" in
+		linux-debian_gnu_linux)
+			# Fetch the apt key
+			info "$BASHTARD_PLAYBOOK" "Adding apt repository"
+			mkdir -pv -m 755 -- /etc/apt/keyrings
+			curl -fsSL "https://pkgs.k8s.io/core:/stable:/v$version/deb/Release.key" \
+				| gpg --dearmor \
+				> /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+			printf "deb [signed-by=%s] %s /\n" \
+				"/etc/apt/keyrings/kubernetes-apt-keyring.gpg" \
+				"https://pkgs.k8s.io/core:/stable:/v$version/deb/" \
+				> /etc/apt/sources.list.d/kubernetes.list
+			apt update
+			;;
+	esac
+
+	pkg install containerd
+	pkg install kubeadm
+	pkg install kubectl
+	pkg install kubelet
+
+	info "$BASHTARD_PLAYBOOK" "Enabling forwarding"
+	cat <<-EOF > "$(config "fs.etcdir")/sysctl.d/kubernetes.conf"
+		net.bridge.bridge-nf-call-iptables  = 1
+		net.bridge.bridge-nf-call-ip6tables = 1
+		net.ipv4.ip_forward                 = 1
+		net.ipv6.conf.all.forwarding        = 1
+		EOF
+
+	sysctl --system
+
+	info "$BASHTARD_PLAYBOOK" "Enabling kernel modules"
+	cat <<-EOF > "$(config "fs.etcdir")/modules-load.d/kubernetes.conf"
+		br_netfilter
+		overlay
+		EOF
+
+	modprobe overlay
+	modprobe br_netfilter
+
+	notice "$BASHTARD_PLAYBOOK" "Creating data directories"
+	mkdir -pv -- "$(playbook_path "data")/manifests.d"
+
+	if [[ "$(config "$BASHTARD_PLAYBOOK.flags.apiserver-advertise-address" "")" != "" ]]
+	then
+		notice "$BASHTARD_PLAYBOOK" "Setting node ip in $(config "fs.etcdir")/default/kubelet"
+		cat <<-EOF > "$(config "fs.etcdir")/default/kubelet"
+			KUBELET_EXTRA_ARGS="--node-ip=$(config "$BASHTARD_PLAYBOOK.flags.apiserver-advertise-address")"
+			EOF
+	fi
+
+	notice "$BASHTARD_PLAYBOOK" "Initialize kubeadm"
+	kubeadm init \
+		--apiserver-advertise-address="$(config "$BASHTARD_PLAYBOOK.flags.apiserver-advertise-address" "127.0.0.1")" \
+		--apiserver-bind-port="$(config "$BASHTARD_PLAYBOOK.flags.apiserver-bind-port" "6443")" \
+		--control-plane-endpoint="$(config "$BASHTARD_PLAYBOOK.flags.control-plane-endpoint" "localhost")" \
+		--node-name="${BASHTARD_PLATFORM[fqdn]}" \
+		--service-cidr="$(config "$BASHTARD_PLAYBOOK.flags.service-cidr" "10.96.0.0/12")" \
+		--service-dns-domain="$(config "$BASHTARD_PLAYBOOK.flags.service-dns-domain" "cluster.local")" \
+		--pod-network-cidr="$(config "$BASHTARD_PLAYBOOK.flags.pod-network-cidr" "10.0.0.0/12")" \
+		|| return 1
+
+	playbook_sync
+}
+
+playbook_sync() {
+	local data
+	local kubeconfig
+	local manifest_prefix
+	local values
+
+	data="$(playbook_path "data")"
+	kubeconfig="$(config "fs.etcdir")/kubernetes/admin.conf"
+	manifest_prefix="$(config "$BASHTARD_PLAYBOOK.manifest-prefix" "")"
+
+	notice "$BASHTARD_PLAYBOOK/manifests" "Applying manifests.d"
+	#kubectl --kubeconfig "$kubeconfig" apply --recursive --filename "$data/manifests.d/$manifest_prefix"
+}
+
+playbook_del() {
+	kubectl drain "${BASHTARD_PLATFORM[fqdn]}" \
+		--delete-emptydir-data \
+		--force \
+		--ignore-daemonsets
+
+	kubeadm reset
+	iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
+	ipvsadm -C
+	rm -fr -- \
+		"$(config "fs.etcdir")/modules-load.d/kubernetes.conf" \
+		"$(config "fs.etcdir")/sysctl.d/kubernetes.conf" \
+		"$(config "fs.etcdir")/cni/net.d" \
+		"$(config "fs.etcdir")/kubernetes" \
+		"/var/lib/etcd" \
+		"/var/lib/cni"
+
+	pkg uninstall kubectl
+	pkg uninstall kubeadm
+	pkg uninstall kubelet
+	pkg uninstall containerd
+
+	case "${BASHTARD_PLATFORM[key]}" in
+		linux-debian_gnu_linux)
+			# Fetch the apt key
+			info "$BASHTARD_PLAYBOOK" "Removing apt repository"
+			rm -fr -- \
+				/etc/apt/keyrings/kubernetes-apt-keyring.gpg \
+				/etc/apt/sources.list.d/kubernetes.list
+			;;
+	esac
+}
-- 
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