[tor-bugs] #32462 [Internal Services/Tor Sysadmin Team]: convert existing varnish caches into nginx

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#32462: convert existing varnish caches into nginx
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     Reporter:  anarcat                              |      Owner:  tpa
         Type:  task                                 |     Status:  new
     Priority:  Medium                               |  Milestone:
    Component:  Internal Services/Tor Sysadmin Team  |    Version:
     Severity:  Normal                               |   Keywords:
Actual Points:                                       |  Parent ID:
       Points:                                       |   Reviewer:
      Sponsor:                                       |
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 in #32239 we have setup nginx as a caching frontend for the blog. but we
 also use varnish elsewhere in our infrastructure, specifically on the
 onionoo services. those are currently being rebuilt (#31659) so maybe it
 would be better to wait for that to complete to finish that transition.

 this will require some refactoring of the "cache" role as it currently
 hardcodes the blog as a service. one idea i had was to have a "name =>
 backends" hash, but maybe that would be too blunt of an instrument and
 we'd just need to split the roles.

 in any case, there's some puppet refactoring involved.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32462>
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