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

[Ulrich Windl]

>>> Ken Gaillot <kgaillot at redhat.com> schrieb am 02.12.2019 um 16:50 in
Nachricht
<49fc68f1249252b912f0ce9f3ed4a3258f23fb7c.camel at redhat.com>:
> On Sat, 2019-11-30 at 18:58 +0300, Andrei Borzenkov wrote:
>> 29.11.2019 17:46, Jan Pokorný пишет:
>> > "Clone" feature for IPAddr2 is actually sort of an overloading that
>> > agent with an alternative functionality -- trivial low-level load
>> > balancing.  You can ignore that if you don't need any such.
>> > 
>> 
>> I would say IPaddr2 in clone mode does something similar to
>> SharedAddress.
> 
> Just a side note about something that came up recently:
> 
> IPaddr2 cloning utilizes the iptables "clusterip" feature, which has
> been deprecated in the Linux kernel since 2015. IPaddr2 cloning
> therefore must be considered deprecated as well. (Using it for a single
> floating IP is still fully supported.)
> 
> IPaddr2 could be modified to use a newer iptables capability called
> "xt_cluster", but someone would have to volunteer to do that as it's
> not a priority.

Probably while doing so, also provide better documentation (e.g. hardware
requirements). I could not get the cluster IP working when I tried several
years ago. Maybe it was due to our networking equipment, but actually I never
found out why...

Regards,
Ulrich

> -- 
> Ken Gaillot <kgaillot at redhat.com>
> 
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