[strongSwan] Load balancing

[Pawel Grzesik]

Hi,

I don't get it. How DNS round robin can help if each strong swan node has his own bind/ipaddress. If there will be a cluster (virtual ip) it make sense but without that it’s not the point or I’m missing somethings :-)

Thanks,
Pawel Grzesik

On 24 Nov 2013, at 15:57, J.Witvliet at mindef.nl wrote:

> Hi,
> 
> As you are faced with thousands clients, i would suggest to get multiple strong-swan servers. (Just to avoid SPOF's) and use DNS-round-robin to select them. Probably the easiest solution.
> 
> Oh, i mist the C-key, i meant to write "lartc" : an indepth howto about linux advanced routing and traffic control. Priceless!
> 
> Hans.
> 
>  
> Van: Naveen [mailto:pncbose at yahoo.com] 
> Verzonden: Friday, November 22, 2013 08:27 PM W. Europe Standard Time
> Aan: users at lists.strongswan.org <users at lists.strongswan.org> 
> Onderwerp: Re: [strongSwan] Load balancing 
>  
> Thanks Hans for responding. Sorry for changing the mail thread as i am having issues with mail client.
> 
> > "It depends on your perspective cq. what you try to achieve...."
> use case is like this: few thousand iOS clients connecting to 'n' Strongswan nodes. For now i am not worried about node failure. Once node fails, client needs to reconnect.
> 
> > 1. Clients P.O.V., you probably want to initiate multiple tunnels, and load balance your traffic over them, see LART
> Not sure what LART means.. Please elaborate.
> 
> 
> > 2. Server P.O.V.  multiple options though  it is more load-spreading and not really load-balancing , you can spread incoming requests, the set-ups, over multiple servers by means of iptables, dnat and the random module.
> Could you point me to a working config/example that i could start experimenting.
> 
> > After setup, the tunnel remains bound to that machine, no swapping hosts after that.Also, DNS/round-robin should also work
> Hans
> Yes - no swapping after tunnel connection. while DNS/round-robin works, i believe it has a limitation of not considering load of the nodes.
> 
> regards
> Naveen
> 
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