mobrovac added a comment.

  In T220402#5199730 <https://phabricator.wikimedia.org/T220402#5199730>, 
@Tarrow wrote:
  
  > Should we be using http rather than https internally?
  
  
  Yes, indeed, sorry that was an omission on my part. Since setting up TLS 
connections takes time, though, you also want to keep these connections alive. 
You can do so by explicitly adding this agent option to the request template:
  
    uri: https://appservers-ro.discovery.wmnet/{+path}
    headers:
      Host: '{req.params.domain}'
    agentOptions:
      keepAlive: true
  
  
  
  > I also wanted to check if we should be using `appservers.discovery.wmnet` 
as the host; I'm not sure if I read things right but I didn't think this host 
is defined? Or should we aiming for `appservers-ro.discovery.wmnet` (since we 
are not writing)? I then saw https://phabricator.wikimedia.org/T199219#4452041 
and was wondering if that is indeed the right place or if it is oddly slow/not 
cached.
  
  Yup, +1, use `appservers-ro` here, in that case. The end point itself is 
synonymous with `appservers-rw` for now, but once we start splitting MW traffic 
based on reads/writes, this will mean that your requests will always land in 
the local DC, both giving it a speed-up and decreasing the load from the master 
appservers, resulting in a net win for everybody :)
  
  > In general is there a place on wikitech (or similar) we should be looking 
to make sure we're getting things right?
  
  Not that I'm aware of :/

TASK DETAIL
  https://phabricator.wikimedia.org/T220402

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