Configuring and running the local balancer on a cluster node

Only applicable when integrating with multiple servers of КАТА 5.0 or a later version.

To configure the local balancer on a cluster node:

1. Start an operating system command shell on the cluster node to run commands with superuser (system administrator) permissions.
2. Rename the basic configuration file of the balancer with the following command:

   mv /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.orig

3. Place the previously prepared configuration haproxy.cfg configuration file in the /etc/haproxy directory and set access rights for it using the following commands:

   chown root:root /etc/haproxy/haproxy.cfg

   chmod 640 /etc/haproxy/haproxy.cfg

4. Configure the system log service:
   • On Ubuntu, Debian, Red Hat Enterprise Linux, Rocky Linux, RED OS, create the /etc/rsyslog.d/haproxy.conf file with the following content:

     $ModLoad imudp

     $UDPServerRun 514

     $UDPServerAddress 127.0.0.1

     if $syslogfacility-text == 'local6' then /var/log/haproxy.log

     if $syslogfacility-text == 'local6' then stop

     if $programname startswith 'haproxy' then /var/log/haproxy.log

     if $programname startswith 'haproxy' then stop

   • On Astra Linux Special Edition, create the /etc/syslog-ng/conf.d/haproxy.conf file with the following content:

     log {

         source {

             udp(ip(127.0.0.1) port(514));

         };

         filter {

             facility(local6) or program("haproxy");

         };

         destination {

             file("/var/log/haproxy.log");

         };

     };

5. Create the /var/log/haproxy.log file and set access rights for it using the following commands:

   touch /var/log/haproxy.log

   chown root:adm /var/log/haproxy.log

   chmod 640 /var/log/haproxy.log

6. If necessary, edit the log rotation settings file for the local balancer (/etc/logrotate.d/haproxy).

   By default, entries are rotated daily.

7. Restart the system log service:
   • On Ubuntu, Debian, Red Hat Enterprise Linux, Rocky Linux, RED OS:

     systemctl restart rsyslog

   • On Astra Linux Special Edition:

     systemctl restart syslog-ng

8. Start the local balancer service:

   systemctl start haproxy

9. Allow running the local balancer service automatically:

   systemctl enable haproxy

10. Check the status of the local balancer service:

    systemctl status haproxy

    The status must be running.

11. Check the presence of entries in the local balancer log:

    tail /var/log/haproxy.log

The local balancer is configured and started on the KSMG cluster node.

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