[tor-bugs] #13003 [Onionoo]: Figure out a better strategy to avoid concurrent Onionoo executions

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#13003: Figure out a better strategy to avoid concurrent Onionoo executions
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     Reporter:  karsten  |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:
    Component:  Onionoo  |    Version:
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by karsten):

 I like the idea of using ScheduledExecutorService and SMTPAppender for
 logging warnings and non-fatal errors.  I'd like to move away from cron
 for that.  This is currently blocking on better logging infrastructure,
 but once we have that, I'd say let's switch.

 Regarding the watchdog, I wonder if we can add a Nagios warning for this.
 In theory, it's sufficient to download
 https://onionoo.torproject.org/summary?limit=0 and make sure the included
 timestamps are not older than, say, three hours.  Sebastian, do you know
 how to write such a warning and make sure that I learn about problems via
 email?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13003#comment:6>
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