adding change_pcs_ips

shell/change_pcs_ips.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+#
+# swap Pacemaker node IPs
+#
+# SPDX-License-Identifier: MIT
+
+# Declare an empty array - do not edit
+declare -a ip_pairs
+
+## EDIT here ##
+
+## These are basically the /etc/hosts values from old to new IP space
+# add as many lines as needed; format: '<from>(comma)<to>' (no spaces!)
+ip_pairs+=('172.20.21.89,172.24.16.105')
+ip_pairs+=('172.20.21.90,172.24.16.107')
+ip_pairs+=('172.20.20.20,172.24.16.108')
+ip_pairs+=('172.20.20.21,172.24.16.109')
+ip_pairs+=('10.128.132.132,10.132.143.68')
+ip_pairs+=('10.128.132.133,10.132.143.69')
+
+## STOP editing here ##
+
+# handy for testing
+cibxml=/var/lib/pacemaker/cib/cib.xml
+
+# back everything up
+echo "Backing up existing configs..."
+DTS=$(date +"%Y%m%d_%H%M")
+cp -a /var/lib/pacemaker/cib{,."$DTS"}
+
+# remove the old cluster signature
+echo "Removing old XML signature file..."
+rm -f /var/lib/pacemaker/cib/cib.xml.sig
+
+# for each element:
+#  convert comma to space to make new child array
+#  add escapes on . in From to prevent regex interpolation
+#  sed the config replace the IP
+echo "Replacing IP addresses..."
+# shellcheck disable=SC2068
+for pair in ${ip_pairs[@]}; do
+  # shellcheck disable=SC2206
+  _tmparr=(${pair//,/ })
+  ipf=${_tmparr[0]//./\\.}
+  ipt=${_tmparr[1]}
+  sed -i -e "s/\b$ipf\b/$ipt/g" "${cibxml}"
+done
+
+# find the epoch (version) and increment it by +1
+echo "Updating epoch (version) of config..."
+epold=$(sed -n 's/.*\bepoch="\([^"]*\).*/\1/p' "${cibxml}")
+epnew=$((epold+1))
+sed -i -e "s/\bepoch=\"$epold\"/epoch=\"$epnew\"/g" "${cibxml}"