backups for tomcat8 should work as well

server/backup.sh

 #! /bin/bash
 BACKUP_FILE="/opt/backup/backup.tar.gz"
 BACKUP_DIR="/tmp/backup/"
-CATALINA_HOME="/var/lib/tomcat7"
 
 rm -f $BACKUP_FILE
 rm -rdf $BACKUP_DIR
 mkdir -p $BACKUP_DIR/tmp
 
+CATALINA_HOME="/var/lib/tomcat7"
+cp $CATALINA_HOME/webapps/*.war "$BACKUP_DIR/tmp" 2>/dev/null
+
+if [ -d "$CATALINA_HOME/webapps/map_images" ]
+then
+    cd $CATALINA_HOME/webapps/
+    tar -zcf $BACKUP_DIR/tmp/map_images.tar.gz map_images
+fi
+
+CATALINA_HOME="/var/lib/tomcat8"
 cp $CATALINA_HOME/webapps/*.war "$BACKUP_DIR/tmp" 2>/dev/null
 
 if [ -d "$CATALINA_HOME/webapps/map_images" ]