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Masters config file (/etc/my.cnf)

[mysqld]                                                             
datadir=/var/lib/mysql                                               
socket=/var/lib/mysql/mysql.sock                                         
old_passwords=1                                                        
bind-address = 0.0.0.0                                                 
server-id = 1                                                          
binlog-ignore-db="mysql"                                               
log-bin = /var/lib/mysql/mysql-bin.log
log-bin-index = /var/lib/mysql/master-log-bin.index
relay-log = /var/lib/mysql/slave-relay.log
relay-log-index = /var/lib/mysql/slave-relay-log.index
expire-logs-days = 31
sync_binlog = 1
innodb_flush_log_at_trx_commit = 1
innodb_support_xa
max_allowed_packet      = 256M
key_buffer_size=256M
key_buffer=258M
innodb_buffer_pool_size = 100M
query_cache_type=1
query_cache_limit=64M
query_cache_size=64M
join_buffer_size = 2M
tmp_table_size = 512M
max_heap_table_size = 512M
thread_cache_size = 4
table_cache = 128
log-error=/var/lib/mysql/mysqld.log
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
log-error=/var/lib/mysql/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid