15.8. Load balancing helper in Rsyslog
The RebindInterval setting specifies an interval at which the current connection is broken and is re-established. This setting applies to TCP, UDP, and RELP traffic. The load balancers perceive it as a new connection and forward the messages to another physical target system.
The RebindInterval setting proves to be helpful in scenarios when a target system has changed its IP address. The Rsyslog application caches the IP address when the connection establishes, therefore, the messages are sent to the same server. If the IP address changes, the UDP packets will be lost until the Rsyslog service restarts. Re-establishing the connection will ensure the IP to be resolved by DNS again.
action(type=”omfwd” protocol=”tcp” RebindInterval=”250” target=”example.com” port=”514” …) action(type=”omfwd” protocol=”udp” RebindInterval=”250” target=”example.com” port=”514” …) action(type=”omrelp” RebindInterval=”250” target=”example.com” port=”6514” …)
