[tor-bugs] #34037 [Core Tor/Chutney]: Make chutney check tor's logs for reachability self-test success

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#34037: Make chutney check tor's logs for reachability self-test success
------------------------------+-------------------------------
 Reporter:  teor              |          Owner:  (none)
     Type:  enhancement       |         Status:  new
 Priority:  Medium            |      Milestone:
Component:  Core Tor/Chutney  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:  ipv6, prop311     |  Actual Points:
Parent ID:  #33050            |         Points:  2
 Reviewer:                    |        Sponsor:  Sponsor55-can
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Description changed by teor:

Old description:

> This ticket is an alternative to #33407.
>
> Instead of fixing bridge descriptor uploads, we can check bridge logs to
> make sure that reachability self-tests have succeeded.
>
> For consistency, we should also do the same checks for relays.
>
> We can only do these tests on authorities, relays, and bridges that are
> configured with `AssumeReachable 0`. Chutney's current defaults are:
> * directory authorities: 1
> * bridge authorities: 1
> * relays: 0
> * bridges: 0
> * clients: clients never perform reachability self-tests
>
> Some custom chutney networks may set `AssumeReachable 1` for relays and
> bridges. So we should make it easy for them to disable these checks.

New description:

 This ticket is an alternative to #33582 or #33222.

 Instead of fixing bridge descriptor uploads, we can check bridge logs to
 make sure that reachability self-tests have succeeded.

 For consistency, we should also do the same checks for relays.

 We can only do these tests on authorities, relays, and bridges that are
 configured with `AssumeReachable 0`. Chutney's current defaults are:
 * directory authorities: 1
 * bridge authorities: 1
 * relays: 0
 * bridges: 0
 * clients: clients never perform reachability self-tests

 Some custom chutney networks may set `AssumeReachable 1` for relays and
 bridges. So we should make it easy for them to disable these checks.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34037#comment:1>
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