[ClusterLabs] Concept of a Shared ipaddress/resource for generic applicatons

Valentin Vidić vvidic at valentin-vidic.from.hr
Tue Dec 3 14:38:06 EST 2019

On Tue, Dec 03, 2019 at 03:06:14PM +0100, Jan Pokorný wrote:
> You likely refer to
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=43270b1bc5f1e33522dacf3d3b9175c29404c36c
> however this extension is activelly maintained to this day, so don't
> see any immediate risks other than something related to containers
> as referred to from said commit -- that is good to know about in
> such scenarios nonetheless.
> My up2date Fedora Rawhide iptables installation, or rather its
> iptables-extensions(8) man page does not mention any deprecation
> at all (unlike with ULOG extension).
> OTOH, what may be a true show stopper is a support for IPv4 only,
> which xt_cluster seems to rectify.

The module might still work but the iptables command from the agent fails:

[  842.536916] ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully
[  842.539215] ipt_CLUSTERIP: cannot use CLUSTERIP target from nftables compat

# uname -a
Linux sid 5.3.0-2-amd64 #1 SMP Debian 5.3.9-3 (2019-11-19) x86_64 GNU/Linux

# iptables --version
iptables v1.8.3 (nf_tables)


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