`conf/workers-shared-extra.yaml.j2` is applied to monolith Complement runs

[MadLittleMods]

docker/complement/conf/workers-shared-extra.yaml.j2 seems to apply even when SYNAPSE_COMPLEMENT_USE_WORKERS=true isn't set. I assume they aren't supposed to stack like that for the monolith?

Noticed because I saw the reject_limit as 99999 when investigating #13541 (comment). Disabling the rate limit could be as expected for the monolith but the way it's inherited from workers seems weird.

This is the command I was running for reference but it probably works in the simplified case as well,

TEST_ONLY_IGNORE_POETRY_LOCKFILE=1 TEST_ONLY_SKIP_DEP_HASH_VERIFICATION=1 COMPLEMENT_DEBUG=1 COMPLEMENT_KEEP_BLUEPRINTS="fed.perf_many_messages.hs1" COMPLEMENT_ALWAYS_PRINT_SERVER_LOGS=1 COMPLEMENT_DIR=../complement ./scripts-dev/complement.sh -run TestMessagesOverFederation -p 1

Dev notes

Related PRs:

• Move complement setup stuff into the Synapse repo #12404
• Docker: copy postgres from base image #13279

[DMRobertson]

Don't have much familiarity here. @reivilibre might be able to advise?

[H-Shay]

Marking this as occasional as it doesn't occur on all runs, and tolerable as it seems that there is a workaround.

[richvdh]

I assume they aren't supposed to stack like that for the monolith?

No, I think this is expected behaviour. As the first two lines in the file say:

This file extends the default 'shared' configuration file (from the 'synapse-workers'
docker image) with Complement-specific tweak.

I think it's just ended up with a bit of a misleading name, so the solution here is just to rename it?