[tor-bugs] #16386 [Chutney]: Chutney generates network with no bandwidth weights

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#16386: Chutney generates network with no bandwidth weights
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     Reporter:  asn      |      Owner:  nickm
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:
    Component:  Chutney  |    Version:
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by teor):

 Hi asn,

 Setting these flags on every relays was a part of the rapid bootstrap
 changes that I made in #13163 and related issues.

 You're right, it would be great to be able to select parts of the network
 for these flags.
 I can imagine this feature being implemented like this:
 {{{
 TestingDirAuthVoteExit m-n
 TestingDirAuthVoteGuard p%-q%
 }}}
 This would vote relays `m` to `n` (by fingerprint) as Exits, and relays
 `p%` to `q%` as Guards. We'd probably want to make a similar change to the
 corresponding `TestingDirAuthVoteHSDir` flag as well, even if we didn't
 use it.

 We could implement this feature in chutney or in tor:
 * In chutney, we could perhaps do this as part of the templating system,
 or maybe it could wait for chutney 2?
 * In tor, we could allow the `TestingDirAuthVote...` parameters to take a
 `m-n` or `p%-q%` argument, by modifying `routerset_contains_routerstatus`.
 I'd want to ensure this was only active in test networks, of course.

 I am in favour of making this change in tor, where it might assist a wider
 range of users. And it would work in chutney 2 for free. But I'd want to
 get nickm's advice.

 What do you think?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16386#comment:1>
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