#Install
apt-get install percona-zabbix-templates
cp /var/lib/zabbix/percona/templates/userparameter_percona_mysql.conf /etc/zabbix/zabbix_agentd.conf.d/
#Configure 
vi /var/lib/zabbix/percona/scripts/ss_get_mysql_stats.php
...
$mysql_user = 'uid';
$mysql_pass = 'pwd';
...
#Test
/var/lib/zabbix/percona/scripts/get_mysql_stats_wrapper.sh gg