On 07/15/2017 01:34 PM, Kristian Fiskerstrand wrote: > On 07/15/2017 11:39 AM, Moritz Wirth wrote: >> Good morning everybody, >> >> is it possible to loadbalance SKS/Nginx using multiple A records for the >> hostname? > > The keyserver pools operate as such DNS Round Robins. I wouldn't > generally recommend it for individual nameservers. > > (i) If the servers are in physical proximity (same DC), you're better > off with, in the case of nginx, usptream: > https://blog.sumptuouscapital.com/2013/10/load-balancing-sks/ > > (ii) if the servers are in different datacenters; use separate hostnames > to access the servers, using DNS RR for this will confuse monitoring of > the server (e.g otherwise both servers will drop if crawler hits the > down server, even if the other is operational, as there is no retry, as > opposed to what you get from upstream module), it also would impact > measuring for geographical pools etc.. so depending on level of > weirdness, could result in exclusion from the pool. >
I should add that this goes for the individual servers and their hostnames specified, there is of course nothing stopping using a third domain name as a DNS round robin for two servers. -- ---------------------------- Kristian Fiskerstrand Blog: https://blog.sumptuouscapital.com Twitter: @krifisk ---------------------------- Public OpenPGP keyblock at hkp://pool.sks-keyservers.net fpr:94CB AFDD 3034 5109 5618 35AA 0B7F 8B60 E3ED FAE3 ---------------------------- "The journey of a thousand miles begins with one step." (Lao Tzu)
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