[tor-bugs] #29861 [Obfuscation/Snowflake]: Snowflake is not working right now for some reason

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#29861: Snowflake is not working right now for some reason
-----------------------------------+--------------------------
 Reporter:  cypherpunks            |          Owner:  cohosh
     Type:  defect                 |         Status:  assigned
 Priority:  Medium                 |      Milestone:
Component:  Obfuscation/Snowflake  |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:                         |  Actual Points:
Parent ID:                         |         Points:
 Reviewer:                         |        Sponsor:
-----------------------------------+--------------------------

Comment (by dcf):

 Good catch on this. As you found, the cause is a disk full of broker logs.
 {{{
 $ df -h /
 Filesystem      Size  Used Avail Use% Mounted on
 /dev/xvda1      5.0G  5.0G   20K 100% /
 $ du -sh /var/log/snowflake-broker
 4.2G    /var/log/snowflake-broker
 }}}

 The final lines in the log are (the last line is truncated):
 {{{
 2019/03/22 06:25:54 Proxy HqhbGCj+n6TCwOs/FB0HdA did not receive a Client
 offer.
 2019/03/22 06:25:54 Received snowflake:  HqhbGCj+n6TCwOs/FB0HdA
 2019/03/22 06:25:54 Received answer:
 }}}

 A similar thing happened with the proxy-go logs. comment:6:ticket:28390
 describes what we did (rotation and compression) to fix it.

 Do you want to try doing those steps here? Or I can do it. Stop the broker
 with `sv stop snowflake-broker` so it stops trying to write logs. Then
 free up some space; usually `apt autoclean` and `apt autoremove` work.
 Compress the old log with `xz -v /var/log/snowflake-broker/current`. Then
 modify the service files; on the snowflake bridge host, you can see the
 runit changes made in /etc for proxy-go with `git show
 18d2e70837f8434827ff2d92f1c1901f7be29569`. Then, you'll also need to edit
 the `config` file in /var/log/snowflake-broker/ as shown. Finally restart
 with `sv start snowflake-broker`.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29861#comment:7>
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