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s-tajima/out_forward.rb

Last active August 29, 2015 13:56
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fluentd source code for explain dns cache behavior.
Raw
out_forward.rb
def resolved_host
case @expire_dns_cache
when 0
# cache is disabled
return resolve_dns!
when nil
# persistent cache
return @resolved_host ||= resolve_dns!
else
now = Engine.now
rh = @resolved_host
if !rh || now - @resolved_time >= @expire_dns_cache
rh = @resolved_host = resolve_dns!
@resolved_time = now
end
return rh
end
end
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