Added tagged-zimbra-downgrade

tools/tagged-zimbra-downgrade/README.md

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+# Tagged Zimbra Downgrade
+
+## Introduction
+
+Have you tried to downgrade from a develop-branch build (i.e. ianw1974 builds) to a tagged build (i.e. Maldua builds) and found out that the installation abruptly ended with this message:
+
+```
+Creating server entry for mail.zimbrademo.net...already exists.
+Setting Zimbra IP Mode...done.
+Saving CA in ldap...failed.
+```
+
+?
+
+Here there is an script to fix it.
+
+## How to fix this
+
+Make sure that Zimbra has started:
+```
+sudo su - zimbra -c 'zmcontrol start'
+```
+
+Download and apply the fix:
+```
+sudo su - zimbra
+cd /tmp
+wget 'https://github.com/maldua/zimbra-foss-builder/raw/main/tools/tagged-zimbra-downgrade/tagged-zimbra-downgrade.sh'
+chmod +x tagged-zimbra-downgrade.sh
+./tagged-zimbra-downgrade.sh
+```
+
+Say **y** to the question and press enter
+
+Finally end the zimbra session thanks to:
+```
+exit
+```
+
+## Now just install/upgrade again
+
+Use your tagged installation (i.e. Maldua installation):
+```
+./install.sh
+```
+to install/upgrade so that the installation is properly completed.

tools/tagged-zimbra-downgrade/tagged-zimbra-downgrade.sh

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+#!/bin/bash
+
+LDAP_DOWNGRADE_FIX_DIR="/opt/zimbra/conf/scripts/LDAP_DOWNGRADE_FIX"
+
+function usage {
+
+  $0
+
+}
+
+function fixBorkedLdap {
+
+  mkdir -p ${LDAP_DOWNGRADE_FIX_DIR}
+  /opt/zimbra/libexec/zmslapcat ${LDAP_DOWNGRADE_FIX_DIR}
+  echo 'You can ignore xxxxxxx UNKNOWN attributeDescription "ZIMBRAxxxxxxxxxxxx" inserted. messages from above.'
+
+  # Actual fix
+  cp ${LDAP_DOWNGRADE_FIX_DIR}/ldap.bak ${LDAP_DOWNGRADE_FIX_DIR}/ldap_TO-BE-FIXED.bak
+  cat ${LDAP_DOWNGRADE_FIX_DIR}/ldap_TO-BE-FIXED.bak | grep -v -E '^ZIMBRA' > ${LDAP_DOWNGRADE_FIX_DIR}/ldap.bak
+
+  # Extra dumps not actually needed
+  /opt/zimbra/libexec/zmslapcat -c ${LDAP_DOWNGRADE_FIX_DIR}
+  /opt/zimbra/libexec/zmslapcat -a ${LDAP_DOWNGRADE_FIX_DIR}
+
+  # Stop zimbra and remove old ldap database
+  zmcontrol stop
+
+  mv /opt/zimbra/data/ldap/mdb /opt/zimbra/data/ldap/mdb.old_LDAP_DOWNGRADE_FIX
+  mkdir -p /opt/zimbra/data/ldap/mdb/db
+
+  # Import sanitized ldap dump
+  /opt/zimbra/libexec/zmslapadd ${LDAP_DOWNGRADE_FIX_DIR}/ldap.bak
+}
+
+if [ "x$(id -u -n)" != "xzimbra" ]; then
+  echo "Please run as ZIMBRA user"
+  echo "Exiting..."
+  exit 1
+fi
+
+###
+
+read -p "This will restart Zimbra. Are you sure?" -r restart_choice
+if [[ $restart_choice =~ ^[Yy]$ ]] ; then
+  echo "Processing..."
+  fixBorkedLdap
+  echo "...Done."
+  echo "Now starting Zimbra..."
+  zmcontrol start
+else
+  echo "Aborted by the user."
+fi