From 4d0f0a5ca2338e5f6ed3fe3a18c602447cf60eb4 Mon Sep 17 00:00:00 2001
From: Bruce Ashfield <bruce.ashfield@gmail.com>
Date: Fri, 10 Dec 2021 15:27:30 -0500
Subject: k8s: introduce host/controller initialization script

Adding a simple helper to setup a host to the NodeReady state.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
---
 recipes-containers/kubernetes/kubernetes/k8s-init | 31 +++++++++++++++++++++++
 recipes-containers/kubernetes/kubernetes_git.bb   | 12 ++++++++-
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 recipes-containers/kubernetes/kubernetes/k8s-init

(limited to 'recipes-containers')

diff --git a/recipes-containers/kubernetes/kubernetes/k8s-init b/recipes-containers/kubernetes/kubernetes/k8s-init
new file mode 100644
index 00000000..8aaa86e8
--- /dev/null
+++ b/recipes-containers/kubernetes/kubernetes/k8s-init
@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# Copyright (C) 2021 Bruce Ashfield
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# cleanup the iptables
+if [ -f /etc/sysconfig/iptables ]; then
+    cp /etc/sysconfig/iptables /etc/sysconfig/iptables.ORIG
+fi
+iptables --flush && iptables --flush && iptables-save > /etc/sysconfig/iptables
+systemctl restart iptables.service
+
+# Load/Enable br_netfilter kernel module
+modprobe br_netfilter
+modprobe overlay
+
+echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables
+echo '1' > /proc/sys/net/bridge/bridge-nf-call-ip6tables
+echo 'net.bridge.bridge-nf-call-iptables=1' >> /etc/sysctl.d/k8s.conf
+echo 'net.bridge.bridge-nf-call-ip6tables=1' >> /etc/sysctl.d/k8s.conf
+echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.d/k8s.conf
+
+systemctl restart systemd-sysctl.service
+
+kubeadm init
+
+# Copy the cluster configuration to the regular users home directory
+mkdir -p $HOME/.kube
+cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+chown $(id -u):$(id -g) $HOME/.kube/config
diff --git a/recipes-containers/kubernetes/kubernetes_git.bb b/recipes-containers/kubernetes/kubernetes_git.bb
index 82edadd6..7cdef2c7 100644
--- a/recipes-containers/kubernetes/kubernetes_git.bb
+++ b/recipes-containers/kubernetes/kubernetes_git.bb
@@ -31,6 +31,7 @@ SRC_URI:append = " \
            file://0001-build-golang.sh-convert-remaining-go-calls-to-use.patch \
            file://0001-Makefile.generated_files-Fix-race-issue-for-installi.patch \
            file://cni-containerd-net.conflist \
+           file://k8s-init \
           "
 
 DEPENDS += "rsync-native \
@@ -100,11 +101,16 @@ do_install() {
 
     install -m 0644 ${WORKDIR}/git/release/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service ${D}${systemd_unitdir}/system/
     install -m 0644 ${WORKDIR}/git/release/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf  ${D}${systemd_unitdir}/system/kubelet.service.d/
+
+    if ${@bb.utils.contains('DISTRO_FEATURES','systemd','true','false',d)}; then
+	install -d "${D}${BIN_PREFIX}/bin"
+	install -m 755 "${WORKDIR}/k8s-init" "${D}${BIN_PREFIX}/bin"
+    fi
 }
 
 CNI_NETWORKING_FILES ?= "${WORKDIR}/cni-containerd-net.conflist"
 
-PACKAGES =+ "kubeadm kubectl kubelet kube-proxy ${PN}-misc"
+PACKAGES =+ "kubeadm kubectl kubelet kube-proxy ${PN}-misc ${PN}-host"
 
 ALLOW_EMPTY:${PN} = "1"
 INSANE_SKIP:${PN} += "ldflags already-stripped"
@@ -131,6 +137,10 @@ FILES:kubectl = "${bindir}/kubectl"
 FILES:kube-proxy = "${bindir}/kube-proxy"
 FILES:${PN}-misc = "${bindir}"
 
+ALLOW_EMPTY:${PN}-host = "1"
+FILE:${PN}-host = "${BIN_PREFIX}/bin/k8s-init"
+RDEPENDS:${PN}-host = "${PN}"
+
 RRECOMMENDS:${PN} = "\
                      kernel-module-xt-addrtype \
                      kernel-module-xt-nat \
-- 
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