Enabling round-robin failover with failback #273
Description
What section to enhance
failover
Round Robin Load Balancing
Description of the problem
It would be nice to clarify how to use failover with failback to enable a round robin loadbalancing with failover.
Reading the sections separately gives the impression that this is not done, so a guide on how to do this since it is possible would be a nice addition.
Proposed solution
Addding a failover for each destination in the loadbalancing, including the next server(s) together with failback enables loadbalancing between multiple servers. In the below example two destinations are used, so when one of them goes offline all traffic goes to the other, and when both are online the traffic is balanced as normal.
This should be possible to do with any amount of destinations I have however only tested it with two so far.
Config Example for Destination
destination d_syslog_udp {
channel {
channel {
filter {
"0" == "$(% ${R_MSEC} 2)"
};
destination {
network(
"first-server.com"
port(514)
transport(udp)
spoof-source(yes)
spoof-source-max-msglen(1024)
failover(
servers("second-server.com")
failback(
successful-probes-required(3)
tcp-probe-interval(60)
)
)
);
};
flags(final);
};
channel {
filter {
"1" == "$(% ${R_MSEC} 2)"
};
destination {
network(
"second-server.com"
port(514)
transport(udp)
spoof-source(yes)
spoof-source-max-msglen(1024)
failover(
servers("first-server.com")
failback(
successful-probes-required(3)
tcp-probe-interval(60)
)
)
);
};
flags(final);
};
};
};