Added prototype excludedatabases option to mysql::server::backup

As per #449

Author: Robert Rothenberg

README.md

@@ -45,7 +45,7 @@ Compatibility mode may fail. It may eat your MySQL server. PLEASE test it before
 ###Beginning with MySQL
 
 If you just want a server installed with the default options you can run
-`include '::mysql::server'`.  
+`include '::mysql::server'`.
 
 If you need to customize options, such as the root
 password or `/etc/my.cnf` settings, then you must also pass in an override hash:
@@ -216,7 +216,7 @@ The provider to use to manage the service.
 
 #####`users`
 
-Optional hash of users to create, which are passed to [mysql_user](#mysql_user). 
+Optional hash of users to create, which are passed to [mysql_user](#mysql_user).
 
 ```puppet
 $users = {
@@ -233,7 +233,7 @@ $users = {
 
 #####`grants`
 
-Optional hash of grants, which are passed to [mysql_grant](#mysql_grant). 
+Optional hash of grants, which are passed to [mysql_grant](#mysql_grant).
 
 ```puppet
 $grants = {
@@ -305,6 +305,11 @@ Boolean to determine if you should cleanup before backing up or after.
 
 Array of databases to specifically back up.
 
+#####`excludedatabases`
+
+Array of databases to exclude from backups. Thus only works when
+`file_per_database` is true.
+
 #####`file_per_database`
 
 Whether a separate file be used per database.

manifests/server/backup.pp

@@ -11,6 +11,7 @@
   $ignore_events = true,
   $delete_before_dump = false,
   $backupdatabases = [],
+  $excludedatabases = [],
   $file_per_database = false,
   $ensure = 'present',
   $time = ['23', '5'],

templates/mysqlbackup.sh.erb

@@ -40,7 +40,7 @@ cleanup
 <% end -%>
 <% if @backupdatabases.empty? -%>
 <% if @file_per_database -%>
-mysql -s -r -N -e 'SHOW DATABASES' | while read dbname
+mysql -s -r -N -e 'SHOW DATABASES' <% if !@excludedatabases.empty? %> | grep -v '^\(<% @excludedatabases.join('|') %>)$' <% end %> | while read dbname
 do
   mysqldump -u${USER} -p${PASS} --opt --flush-logs --single-transaction \
     ${EVENTS} \
@@ -53,7 +53,7 @@ mysqldump -u${USER} -p${PASS} --opt --flush-logs --single-transaction \
 <% end -%>
 <% else -%>
 <% @backupdatabases.each do |db| -%>
-mysqldump -u${USER} -p${PASS} --opt --flush-logs --single-transaction \ 
+mysqldump -u${USER} -p${PASS} --opt --flush-logs --single-transaction \
     ${EVENTS} \
  <%= db %><% if @backupcompress %>| bzcat -zc <% end %>> ${DIR}/${PREFIX}<%= db %>_`date +%Y%m%d-%H%M%S`.sql<% if @backupcompress %>.bz2<% end  %>
 <% end -%>