[tor-bugs] #29258 [Circumvention/Snowflake]: Provide an IPv6 address for the Snowflake broker

[Tor Bug Tracker & Wiki]

#29258: Provide an IPv6 address for the Snowflake broker
--------------------------------------------+------------------------------
 Reporter:  ahf                             |          Owner:  dcf
     Type:  task                            |         Status:  merge_ready
 Priority:  Medium                          |      Milestone:
Component:  Circumvention/Snowflake         |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  anti-censorship-roadmap-august  |  Actual Points:
Parent ID:                                  |         Points:
 Reviewer:                                  |        Sponsor:
                                            |  Sponsor28-must
--------------------------------------------+------------------------------
Changes (by cohosh):

 * status:  needs_review => merge_ready


Comment:

 Okay I think we can go ahead and finish switching hosts now.

 >About logs, I'm thinking we just let the log files happen in parallel on
 the old and new hosts. Then after we've made the switch, we check the old
 logs for sanitization and publish them. Logs we publish in the future from
 the new broker will partially temporally overlap those from the old, but
 that should be no problem.

 The metrics logs will be the largest problem (see #322131). I propose this
 for the switch:
 - stop the broker process on the new and old host
 - copy over all metrics log files from the old host to the new host
 - start the new host

 We're going to lose partial metrics for the collection period that
 overlaps with the switch, but that actually happens every time we restart
 the broker since metrics for the time period (which is one) are stored in
 memory until the time period ends at which point they are written to a
 file.

 So, maybe the better question to ask here is: is that okay and if not how
 do we solve it more generally?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29258#comment:15>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online