The main goal of this PR is to handle device list changes onto multiple
writers, off the main process, so that we can have logins happening
whilst Synapse is rolling-restarting.
This is quite an intrusive change, so I would advise to review this
commit by commit; I tried to keep the history as clean as possible.
There are a few things to consider:
- the `device_list_key` in stream tokens becomes a
`MultiWriterStreamToken`, which has a few implications in sync and on
the storage layer
- we had a split between `DeviceHandler` and `DeviceWorkerHandler` for
master vs. worker process. I've kept this split, but making it rather
writer vs. non-writer worker, using method overrides for doing
replication calls when needed
- there are a few operations that need to happen on a single worker at a
time. Instead of using cross-worker locks, for now I made them run on
the first writer on the list
---------
Co-authored-by: Eric Eastwood <erice@element.io>
I have a use case where I'd like the Synapse image to start up a
postgres instance that I can use, but don't want to force Synapse to use
postgres as well.
This commit prevents postgres from being started when it has already
been explicitly enabled elsewhere.
* complement: enable dirty runs
* Add changelog
* Set a low connpool limit when running in Complement
Dirty runs can cause many containers to be running concurrently,
which seems to easily exhaust resources on the host. The increased
speedup from dirty runs also seems to use more db connections on
workers, which are misconfigured currently to have
`SUM(workers * cp_max) > max_connections`, causing
```
FATAL: sorry, too many clients already
```
which results in tests failing.
* Try p=2 concurrency to restrict slowness of servers which causes partial state join tests to flake
* Debug logging
* Only run flakey tests
* Only adjust connection pool limits in worker mode
* Move cp vars to somewhere where they get executed in CI
* Move cp values back to where they actually work
* Debug logging
* Try p=1 to see if this makes worker mode happier
* Remove debug logging
* Expose getting SYNAPSE_WORKER_TYPES from external, allowing override of workers requested.
* Add WORKER_TYPES variable option to complement.sh script that passes requested workers into start_for_complement.sh entrypoint.
* Update docs to reflect this new ability.
* Changelog
* Don't rely on soft wrapping to format long strings
Good idea dklimpel. Thanks for catching that.
Co-authored-by: Dirk Klimpel <5740567+dklimpel@users.noreply.github.com>
* Small nits just noticed in docs.
* Fixup new line in docs.
Co-authored-by: Dirk Klimpel <5740567+dklimpel@users.noreply.github.com>
