Re: [Ipvsman-users] ipvsman

[Dr. V. J. <vol...@in...>]

Hello Gerry!

Gerry Reno schrieb:
> Congratulations on the start of your ipvsman project! I posted a 
> message to the ipvsman-user list.  Is it active yet? 
Yes and no. The list was active but my email-address was wrong so I 
don't get your posting.
Sorry for that and thank you very much for informing me.

To answer your question.

> I am looking to setup a pair of
> fault-tolerant load balancers that will route a virtual web IP to my
> real webserver cluster nodes. I was originally thinking about heartbeat
> and ldirectord or keepalived. How does ipvsman/d compare to these? Is
> it an all-in-one type solution? Or do I still need some other things?
> The description says that it replaces ldirectord. Ok, then what about
> the heartbeat failover functionality? Do I still need heartbeat?
ipvsman is more an all-in-one solution than ldirectord or keepalived

in that way it's a realtime GUI plus a lifekeeping daemon.

ipvsman does not address the problem of failover via heartbeat or VRRP active active IP-sharing. I personally do not like all in wonder solutions and like to divide things that are not much related to reduce komplexity.

Therefore in our cluster projects we run two loadbalancers running ipvsman coupled over heartbeat as failover-pair. This setup is not very complicated and robust enought for quite large mumber of realservers.

In addition we have some projects where we do only failover with heartbeat and without loadbalancing at all.

We have started with heartbeat and ldirectord. At this time keepalived was not so well established as now. So I wrote ipvsman. 

So there are two possible advices I can give you.

Use ipvsman/ipvsmand + heartbeat if you like a solution with 2 components.

Use ipvsman + keepalived + heartbeat if you like a solution with 3 components or ipvsman + keepalived + VRRP.

keepalived is much more complete than ipvsmand - it features more availability checks, sorry_servers, firewall rules, VRRP etc.

ipvsmand may have all this features some time. Our customers run sites with 100 Mio. pagevisits per month with ipvsman/ipvsmand without 
needing this advanced features.

I hope this gives you a picture. Do not hesitate to ask further.

Best regards,

Volker

-- 
====================================================
   inqbus it-consulting      +49 ( 341 )  5643800
   Dr.  Volker Jaenisch      http://www.inqbus.de
   Herloßsohnstr.    12      0 4 1 5 5    Leipzig
   N  O  T -  F Ä L L E      +49 ( 170 )  3113748
====================================================