Pen : MariaDB Load Balancing2016/06/12

Configure Pen to Load Balance to 2 MariaDB backends.

       |
-------+-----------------------------------------------
       |
       +-------------------+--------------------+
       |10.0.0.30          |10.0.0.51           |10.0.0.52
 +-----+------+    +-------+------+     +-------+------+
 |  Frontend  |    |   Backend#1  |     |   Backend#2  |
 | Pen Server |    |    MariaDB   |     |    MariaDB   |
 +------------+    +--------------+     +--------------+

[1]	Configure Pen. Before this section, configure basic settings, refer to here.

root@dlp:~#

vi /etc/pen.conf

# create new

LOGFILE=/var/log/pen.log
WEBFILE=/var/www/html/pen/webstats.html
MAX_CONNECTIONS=256
ROUNDROBIN=true

# listening port

PORT=3306

# number of backends

BACKEND=2

# define backend servers

SERVER1=10.0.0.51:3306
SERVER2=10.0.0.52:3306

root@dlp:~#

systemctl restart pen

[2]	Make sure it works fine to access to the frontend server from a Client with SQL like follows.

root@desktop:~#

mysql -u keystone -p -h 10.0.0.30 keystone -e "select * from table01;"

Enter password:

+------+-------------------+
| id   | name              |
+------+-------------------+
|    1 | db01.srv.world    |
+------+-------------------+

root@desktop:~#

mysql -u keystone -p -h 10.0.0.30 keystone -e "select * from table01;"

Enter password:

+------+-------------------+
| id   | name              |
+------+-------------------+
|    1 | db02.srv.world    |
+------+-------------------+

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