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Hello,
> sorry, I missed this posting last week.
> You don't need the ppc, the script handles persistence for you.
How does the script know about my own protocols? I don't get it. There
must be a flag where you can explicitly set persistency and if you set
nothing, the script does its heuristics.
> ahem, cough, I'll try again.
>
> Most services are handled by a single port entry in ipvsadm.
To my understanding a service is an IP:PORT tuple where port is
singular or the quiesced port. If you refer to protocols with
services I'd agree but services as referred to LVS services I
would tend to say that 'all services are handled by a single
port entry in ipvsadm'. YMMV.
OTOH you can have indirect multiple port groups with the fwmark
feature, also called service :)
> Some services need extra attention - the following conditions are
> handled by the configure script.
Again, I would say: 'some protocols need extra attention'
> https: the key exchanges needed for https require that the service
> be persistent.
yep.
> ftp: this is a multiport (20,21) service.
> For LVS-NAT, the multiport setup is handled
> by loading the module ip_masq_ftp. For VS-DR, VS-Tun,
> the two ports are made persistent.
agreed.
> http/https: if http is forwarded to a realserver which
> is also handling https, then http is made persistent, on
> the assumption that this is an e-commerce site.
Wow! I don't want to sound picky but: How can you know how
people implemented the transition from http to https for
payment on their 2/3-tier e-commerce framework? See, I still
vote for the strict persistency-veto variable. You can do
configuration based on your understanding and on experience
but you have to leave people the possiblity to switch this
off with a flag.
> other port pairs: these can be set by adding entries to
> the array @persistent_services.
Is port pairs defined as 'one port or more ports' or 'exactly
two ports' ?
> Does this help?
:) Depends on how you look at it.
Cheers and I wish you a nice week,
Roberto Nibali, ratz
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