Creating a configuration file for the built-in balancer

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

To create a configuration file for the built-in balancer:

1. Create a text file in the Unix format (LF for newline) and name it haproxy.cfg.
2. Add the following lines to the file:

   global

       log 127.0.0.1 local6

       chroot /var/lib/haproxy

       pidfile /var/run/haproxy.pid

       stats socket /var/lib/haproxy/stats user root group adm mode 660 level user

       maxconn 1000

       user haproxy

       group haproxy

       daemon

    

   defaults

       mode tcp

       log global

       retries 3

       timeout queue 1m

       timeout connect 10s

       timeout client 1m

       timeout server 1m

       timeout check 10s

       maxconn 1000

    

   frontend kata_balancer

       bind 127.0.0.1:8000

       default_backend kata_servers

3. Choose the appropriate method of specifying KATA server addresses and add the corresponding line to the file.
   • If you want to specify IP addresses of all KATA servers in the configuration file, add the following lines to the file:

     backend kata_servers

         balance roundrobin

         default-server check

         server kata_node1 <IP-address1:port1>

         server kata_node2 <IP-address2:port2>

         server kata_node3 <IP-address3:port3>

         server kata_node4 <IP-address4:port4>

   • If you want to obtain an up-to-date list of addresses using a domain name (DNS record), add the following lines to the file:

     resolvers dns_servers

         parse-resolv-conf

         accepted_payload_size 8192

         timeout resolve 10s

         timeout retry 10s

         hold valid 60s

      

     backend kata_servers

         balance roundrobin

         default-server check resolvers dns_servers init-addr none

         server-template kata_node 8 <domain_name>:<port>

     To obtain the list of addresses using a domain name, on the DNS server, create a domain name (for example, kata.example.com) with multiple A records indicating the IP addresses of KATA servers.

4. Save the configuration file.

The configuration file for the built-in balancer is created.

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