Re: [Sks-devel] SKS Loadbalancing over DNS

[Kristian Fiskerstrand]

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.

-- 
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Kristian Fiskerstrand
Blog: https://blog.sumptuouscapital.com
Twitter: @krifisk
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