The load-balanced Snowflake bridge is running in production since 2022-01-31. Thanks Roger, Gary, Roman for your input.
Hopefully reproducible installation instructions: https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Survival-Guid... Observations since: https://bugs.torproject.org/tpo/anti-censorship/pluggable-transports/snowfla...
Metrics graphs are currently confused by multiple instances of tor uploading descriptors under the same fingerprint. Particularly in the interval between 2022-01-25 and 2022-02-03, when a production bridge and staging bridge were running in parallel, with four instances being used and another four being mostly unused. https://metrics.torproject.org/rs.html#details/5481936581E23D2D178105D44DB69... https://metrics.torproject.org/userstats-bridge-transport.html?start=2021-11... Since 2022-02-03, it appears that Metrics is showing only one of the four running instances per day. Because all four instances are about equally used (as if load balanced, go figure), the values on the graph are 1/4 what they should be. The reported bandwidth of 5 MB/s is actually 20 MB/s, and the 2500 clients are actually 10000. All the necessary data are present in Collector, it's just a question of data processing. I opened an issue for the Metrics graphs, where you can also see some manually made graphs that are closer to the true values. https://bugs.torproject.org/tpo/network-health/metrics/onionoo/40022
I started a thread on tor-dev about the issues of onion key rotation and ExtORPort authentication. https://lists.torproject.org/pipermail/tor-dev/2022-February/thread.html