[metrics-bugs] #22488 [Metrics/Onionoo]: Include relay version listed in consensus in addition to platform line from server descriptor

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#22488: Include relay version listed in consensus in addition to platform line from
server descriptor
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 Reporter:  cypherpunks      |          Owner:  metrics-team
     Type:  enhancement      |         Status:  reopened
 Priority:  High             |      Milestone:  Onionoo-2.0.0
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2018     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
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Comment (by teor):

 Onionoo displays the platform from the descriptor.
 But it uses the relay version and recommended versions list from the
 consensus to calculate the relay recommended version field.
 This is a correct behaviour.

 There are three ways to resolve this issue:
 * clarify that the recommended version uses the consensus version at
 https://metrics.torproject.org/onionoo.html#details_relay_recommended_version
 * make Onionoo parse the platform field in the descriptor and compare it
 to the consensus version
 * fix the underlying bug in Tor and wait 6 months for the directory
 authorities to deploy the fix (see #24864)
   * since this isn't causing any network issues, it's low priority right
 now. I'm not sure when we will get time to fix it.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22488#comment:21>
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