sbin/itzks-prepare-reinstall: Add script to clean-up puppet client certificates before reinstalling. Must be run on tjener or puppetserver.

1 files changed, 77 insertions, 0 deletions

diff --git a/sbin/itzks-prepare-reinstall b/sbin/itzks-prepare-reinstall
new file mode 100755
index 0000000..fd4ef2c
--- /dev/null
+++ b/sbin/itzks-prepare-reinstall
@@ -0,0 +1,77 @@
+#!/bin/bash
+
+# Copyright (C) 2022 Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+unset http_proxy
+unset https_proxy
+
+DOMAIN="intern"
+HOSTNAME="$(hostname -f)"
+PUPPET_SERVER="puppetserver.intern"
+TJENER_SERVER="tjener.intern"
+
+PUPPET_CLIENT_CN="${1}"
+if [ -z "${PUPPET_CLIENT_CN}" ]; then
+	echo "usage: $(basename $0) <computer>"
+	exit -2
+fi
+
+if [ "${HOSTNAME}" != "${PUPPET_SERVER}" ] && [ "${HOSTNAME}" != "${TJENER_SERVER}" ]; then
+	echo "$(basename $0): Error: This script may only be run on 'tjener.intern' or 'puppetserver.intern'."
+	exit -1
+fi
+
+if ! echo ${PUPPET_CLIENT_CN} | grep -qE "\."; then
+	PUPPET_CLIENT_CN="${PUPPET_CLIENT_CN}.${DOMAIN}"
+elif ! echo ${PUPPET_CLIENT_CN} | grep -qE "^[-_a-z0-9]+\.${DOMAIN}\$"; then
+	echo "$(basename $0): Error: Hostname '${PUPPET_CLIENT_CN}' is not in domain .${DOMAIN}."
+	exit -3
+fi
+
+if [ -z "$(dig ${PUPPET_CLIENT_CN} +short | head -n1)" ]; then
+	echo "$(basename $0): Error: Hostname '${PUPPET_CLIENT_CN}' unknown. Mistyped the hostname?"
+	exit -4
+fi
+
+### Puppet 5.x et al. (until Debian 11)
+
+# strip domain name
+hostname_short="$(echo ${PUPPET_CLIENT_CN} | cut -d '.' -f1)"
+
+## lookup host and see if it exists in LDAP:
+ldapsystem=`ldapsearch -xLLL "(&(cn=${hostname_short})(|(objectClass=GOHard)(|(objectClass=ipHost))))" cn 2>/dev/null | perl -p00e 's/\r?\n //g' | grep -E '^cn:' | sed -e 's/^cn: //g'`
+
+if [ -n "${ldapsystem}" ]; then
+
+	source /etc/os-release
+
+	if [ "${ID}" = "debian" ] && \
+	   ([ "${VERSION_CODENAME}" == "stretch" ] || \
+	    [ "${VERSION_CODENAME}" == "buster" ] || \
+	    [ "${VERSION_CODENAME}" == "bullseye" ]); then
+
+			# yes, we should clean this host CRT/KEY, but the puppet 5.x way
+			puppet cert clean "${PUPPET_CLIENT_CN}"
+
+	else
+
+		# yes, we should clean this host CRT/KEY, but the puppet 7++ way
+		puppetserver ca clean --certname "${PUPPET_CLIENT_CN}"
+
+	fi
+
+fi