Re: option redir and latest snapshot

Willy Tarreau a écrit :

>> The tarball you mention at the end of your answer seems to work well. 
>> But, there is still a problem with server ceck and i don't know if it is 
>> due to haproxy or something else on my network. If y configure a check 
>> interval less than 10s, it works.

no, less than 10s. e.g., check inter 10000 fall 4 rise 1 works while check inter 20000 fall 4 rise 1 gives the strange behaviour i mention.

> I have never seen such a strange behaviour! The checks are so simple, I
> would not even imagine what could cause this! Would you happen to have
> ip_conntrack loaded on the machine hosting haproxy ?
ip_conntrack is enabled (it must be since i use openvz virtualization).

> It would be possible
> that when it runs, the conntrack table slowly fills, and that once full,
> haproxy simply cannot establish new connections to the servers, resulting
> in them being seen as down.

Well, if it the case the check should work better when check interval is greater, shouldn't it?

> It is also possible that anything between haproxy and the servers is causing
> this. You may want to experiment with the check interval to see if the
> problem appears in a delay proportionnal to the interval.
There is one thing really strange : i've checked the network traffic with tcpdump and i can see the check requests of haproxy arriving on the backend, and i also can see the response send by the backend.

I'll check if haproxy receive the response.

Florian Received on 2008/02/15 09:12