[tor-bugs] #30912 [Internal Services/Tor Sysadmin Team]: Investigate stunnel outage on crm-ext-01

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#30912: Investigate stunnel outage on crm-ext-01
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 Reporter:  peterh                               |          Owner:  tpa
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:
Component:  Internal Services/Tor Sysadmin Team  |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:                                       |  Actual Points:
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by peterh):

 It's because we're using Redis as a message broker as well as a key/value
 store. I was surprised the first time I heard of this, too, but tons of
 people use Redis to pass messages between apps. It has a list data
 structure that turns out to be really good for message queues. It's nice
 because it's really lightweight compared to the other message brokers
 which makes it good for this kind of small application.

 It looks like maybe stunnel went down again between about 3AM and 5AM PDT
 today. I'm guessing your new detection thing means you got it back up
 faster? If so, awesome! Anything in the stunnel logs on crm-int-01?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30912#comment:13>
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