Thanks guys for the answers... I try to create, Active/Active model... I'll check this soft like wackamole or director...
2011/12/7 [email protected] <[email protected]> > I'm succesfully using lvs in director mode to load balance and provide ha > for multiple varnish caches. It works really well. > On Dec 7, 2011 5:36 a.m., "Allan Wind" <[email protected]> > wrote: > >> On 2011-12-07 00:05:24, Alejandro wrote: >> > Hi guys, >> > >> > I need your advice... I'm using varnish into multiple server, some for >> > caching dynamic content and other only for static content. >> > >> > On front of the Dynamic Content Varnish y have Cisco ACE Load balancer, >> but >> > on front of the Static Varnish, the traffic is much higher and can't use >> > Cisco ACE, for this reason I'm using RoundRobin DNS into this 2 servers. >> > >> > This week I had, some network issue with one of this servers and when >> the >> > network go down I loose 50% of the traffic... >> > >> > here my question, or advice request... How I can have HA with 2 varnish >> > server? I'm thinking on Heartbeat or Heartbeat+ldirectord, please fell >> free >> > to send your suggestions. >> >> As your clients do not fall back to the 2nd IP it means you need >> one (active/passive) or two vips (active/active) that can be >> shared between your two varnish servers. >> >> If you have cachable dynamic content then your two Varnish >> instances may return different content to the same client. This >> may or may not be an issue. Others will have to weight in if >> cache invalidation of Varnish entries is a doable strategy >> (if you cannot set your expiration headers correctly). On the >> positive side you have a warm cache should one of your Varnish >> instances fail. With a active/passive fail over the cold cache >> may be problematic. >> >> That said I am surprised that you think Varnish will be able to >> handle your traffic but a pair of load balancers cannot. If the >> Cisco ACE is not up to it have you looked at haproxy? You still >> have the same vip issues, but load balancers are stateless and >> give you persistence connections to minimize differences between >> Varnish instances. >> >> >> /Allan >> -- >> Allan Wind >> Life Integrity, LLC >> <http://lifeintegrity.com> >> >> _______________________________________________ >> varnish-misc mailing list >> [email protected] >> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >> > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >
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