On Mon, 13 May 2013, Gary Foster wrote:
On May 13, 2013, at 5:12 AM, Philippe Muller <[email protected]> wrote:
As far I know, rsyslog doesn't do "load balancing".
Actually, it does play very nicely with load balancers such as HAproxy.
$ActionSendTCPRebindInterval <number>
will configure the TCP forwarding to rebind the TCP connection every <number>
messages which makes it work perfectly through a load balancer. I'm currently
doing exactly this with HAproxy and it works a treat when using straight TCP
output.
However, it seems that the omfwd module is the only module that supports this
configuration. I do not believe RELP or any of the other om* modules support
setting a TCP rebind interval.
Bear in mind, do not set that number too low, you don't want it rebinding too
frequently. I currently rebind after every 2000 message which with my traffic
load is somewhere in the ballpark of 2 seconds generally.
I believe that you are correct across the board. It should not be that difficult
a task to get this feature added to RELP, but with Rainer's crash project he's
not going to get a chance to do anything until June.
This should be pretty close to a cut-n-paste of the code from omtcp to omrelp,
count the messages and close/reopen the connection
the more complex the network protocol the more work there is to set it up,
setting this to give the load balancer a chance to redirect the traffic every
second or two is a good timing to aim for.
David Lang
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