Netfilter-Devel Archive on
 help / color / Atom feed
From: Phil Sutter <>
To: "Serguei Bezverkhi (sbezverk)" <>
Cc: "" <>
Subject: Re: Numen with reference to vmap
Date: Wed, 4 Dec 2019 18:00:32 +0100
Message-ID: <> (raw)
In-Reply-To: <>


On Wed, Dec 04, 2019 at 04:13:45PM +0000, Serguei Bezverkhi (sbezverk) wrote:
> It is not static, SVC chain jump rules will be updated on every endpoint change,  the dynamic nature is  achieved by manipulating rules. It is doable with nftables, I understand that, but I was also looking for a more efficient way to do it, my concern is if we use 1 to 1 conversion, we will end up with the same iptables scalability/performance  limitations.
> Here is how rules look after a third and forth endpoint gets dynamically added to the service.
> -A KUBE-SVC-57XVOCFNTLTR3Q27 -m statistic --mode random --probability 0.25000000000 -j KUBE-SEP-FS3FUULGZPVD4VYB
> -A KUBE-SVC-57XVOCFNTLTR3Q27 -m statistic --mode random --probability 0.33332999982 -j KUBE-SEP-MMFZROQSLQ3DKOQA
> -A KUBE-SVC-57XVOCFNTLTR3Q27 -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-TEWRTAGT3CD3D47Z

Ah, that's nice. The rules are updated in a way that with a single added
rule probabilities are equalized again. This is something I fear we
can't do with a map in nftables yet, I guess it would need a new object
type (or maybe a special set/map type or something. All you can do for
now is copy the above in nftables.

Cheers, Phil

  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-04  0:54 Serguei Bezverkhi (sbezverk)
2019-12-04 10:18 ` Phil Sutter
2019-12-04 13:47   ` Serguei Bezverkhi (sbezverk)
2019-12-04 15:17     ` Phil Sutter
2019-12-04 15:42       ` Serguei Bezverkhi (sbezverk)
2019-12-04 15:56         ` Phil Sutter
2019-12-04 16:13           ` Serguei Bezverkhi (sbezverk)
2019-12-04 17:00             ` Phil Sutter [this message]
2019-12-04 17:31           ` Arturo Borrero Gonzalez
2019-12-04 17:49             ` Serguei Bezverkhi (sbezverk)
2019-12-04 21:05               ` Serguei Bezverkhi (sbezverk)
2019-12-04 22:32             ` Phil Sutter

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Netfilter-Devel Archive on

Archives are clonable:
	git clone --mirror netfilter-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 netfilter-devel netfilter-devel/ \
	public-inbox-index netfilter-devel

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone