[tor-bugs] #30588 [Metrics/Onionperf]: Move tgen servers to port 443

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#30588: Move tgen servers to port 443
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 Reporter:  irl                |          Owner:  metrics-team
     Type:  defect             |         Status:  needs_review
 Priority:  High               |      Milestone:
Component:  Metrics/Onionperf  |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:                     |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:
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Comment (by irl):

 Replying to [comment:1 karsten]:
 > To add an important detail: we'd change the port from 80 to 443 for a
 period of, say, two weeks, without making any other changes at the same
 time. And then, after those two weeks, we'd starting using port 80 for the
 certbot challenge.

 I think that using port 443 instead of port 80 is more representative of
 typical Tor traffic anyway, so even if there are large differences we
 would make this change.

 > Couple quick thoughts on this plan:
 >  - Can we run a quick analysis of exit capacity to ports 80 and 443? I
 believe they're roughly the same, but it would be good to know.

 Do you mean exit policy? Yes, I think this is a good thing to do.

 >  - Can we schedule this change in a way that it happens at midnight UTC,
 perhaps even at 2019-06-01 00:00 UTC? Just in case there ''is'' a
 difference in user-perceived performance, it would be easier to explain
 when we made this change. This could mean turning off OnionPerf instances
 on Friday evening and making the change on Saturday morning, just so that
 Friday measurements are to port 80 and Saturday measurements to port 443.

 To do this on Friday will be difficult as I will be in a field. Having it
 happen at midnight is easier and we can record the change per-instance in
 the metrics timeline.

 >  - Should we try out this change at least once on a local machine, also
 to know exactly what configuration changes are necessary?

 Right now my plan is to destroy and rebuild the instances on the OTF
 cloud. They were managed with Salt previously but this was right at the
 start of when we were trying out Salt and having learned lessons from it
 it would be better to start again.

 Initially I will change op-ab to listen on port 443 for tgen and we run
 this for two weeks. We can compare with the previous two weeks of op-ab
 data and also against the instances in the OTF cloud. Following this, I
 will destroy and rebuild the OTF cloud instances with tgen on port 443.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30588#comment:2>
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