HAProxy : Layer 4 Load Balancing2020/09/04 |
Configure HAProxy on Layer 4 Mode.
On this example, configure MariaDB backend like the following environment. -----------+---------------------------+--------------------------+------------ | | | |10.0.0.30 |10.0.0.51 |10.0.0.52 +----------+-----------+ +-----------+----------+ +-----------+----------+ | [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] | | HAProxy | | MariaDB Server#1 | | MariaDB Server#2 | +----------------------+ +----------------------+ +----------------------+ |
[1] | Configure HAProxy. |
root@dlp:~#
vi /etc/haproxy/haproxy.cfg # change [mode] value in [defaults] section defaults log global mode tcp # add to the end # define frontend and backend servers frontend mysql-in bind *:3306 default_backend backend_dbservers backend backend_dbservers balance roundrobin server node01 10.0.0.51:3306 check server node02 10.0.0.52:3306 checkroot@dlp:~# systemctl restart haproxy |
[2] | Verify working normally to access to the frontend HAproxy Server. |
ubuntu@client:~# mysql -u ubuntu -p -h dlp.srv.world -e "show variables like 'hostname';" Enter password: +---------------+------------------+ | Variable_name | Value | +---------------+------------------+ | hostname | node01.srv.world | +---------------+------------------+ubuntu@client:~# mysql -u ubuntu -p -h dlp.srv.world -e "show variables like 'hostname';" Enter password: +---------------+------------------+ | Variable_name | Value | +---------------+------------------+ | hostname | node02.srv.world | +---------------+------------------+ |
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