From: Phil Sutter <phil@nwl.cc>
To: sbezverk <sbezverk@gmail.com>
Cc: "netfilter-devel@vger.kernel.org" <netfilter-devel@vger.kernel.org>
Subject: Re: load balancing between two chains
Date: Mon, 20 Jan 2020 12:23:09 +0100 [thread overview]
Message-ID: <20200120112309.GG19873@orbyte.nwl.cc> (raw)
In-Reply-To: <011F145A-C830-444E-A9AD-DB45178EBF78@gmail.com>
Hi Serguei,
On Sun, Jan 19, 2020 at 09:46:11PM -0500, sbezverk wrote:
> While doing some performance test, btw the results are awesome so far, I came across an issue. It is kubernetes environment, there is a Cluster scope service with 2 backends, 2 pods. The rule for this service program a load balancing between 2 chains representing each backend pod. When I curl the service, only 1 backend pod replies, second times out. If I delete pod which was working, then second pod starts replying to curl requests. Here are some logs and packets captures. Appreciate if you could take a look at it and share your thoughts.
Please add counters to your rules to check if both dnat statements are
hit. You may also switch 'jump' in vmap to 'goto' and add a final rule
in k8s-nfproxy-svc-M53CN2XYVUHRQ7UB (which should never see packets).
Did you provide a dump of traffic between load-balancer and pod2? (No
traffic is relevant info, too!) A dump of /proc/net/nf_conntrack in
error situation might reveal something, too.
Cheers, Phil
next prev parent reply other threads:[~2020-01-20 11:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 2:46 load balancing between two chains sbezverk
2020-01-20 11:23 ` Phil Sutter [this message]
2020-01-20 16:31 ` sbezverk
2020-01-20 17:06 ` Florian Westphal
2020-01-20 17:42 ` sbezverk
2020-01-20 21:39 ` Florian Westphal
2020-01-20 21:54 ` sbezverk
2020-01-20 22:00 ` Florian Westphal
2020-01-20 22:07 ` sbezverk
2020-01-20 22:12 ` Florian Westphal
2020-01-20 22:50 ` sbezverk
2020-01-21 4:18 ` sbezverk
2020-01-21 5:24 ` Florian Westphal
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