DietPi-Software | Matrix Synapse Server

[ravenclaw900]

Status: Ready

• Implement using PostgreSQL
• Switch to building from source

Reference: #4525

Commit list/description:

• Multiple | Add Synapse Server

[MichaIng]

Btw, what was the reason for switching away from the official APT repository?

[ravenclaw900]

It only has amd64 and i386 packages.

[MichaIng]

Ah okay, makes totally sense then. And Buster backports is not available on 32-bit RPi images.

[MichaIng]

Mystery solved why on ARMv6/7 additional (image codec) libraries are required:

• The install instructions for Pillow from piwheels.org explicitly state this: https://piwheels.org/project/pillow/
• The builds from PyPI are significantly larger (~3 MiB vs ~1 MiB): https://pypi.org/project/Pillow/#files
  So I guess they have required libraries included. libjpeg and zlib are mandatory, the others could have been disabled for those builds as well: https://pillow.readthedocs.io/en/latest/installation.html#external-libraries

[MichaIng]

Ready from my end. Tested on all distro versions, ARMv6/7/8 and x86_64 and:

• Build dependencies minimised.
• Changed PostgreSQL default (on Buster and up) to not listen on TCP/IP anymore but UNIX domain socket only and adjusted Synapse accordingly. This reduces overhead/memory usage a little and provides ~30% faster communication. Since Synapse is the first and only dependant, this is a unique chance to implement this as default right from the start. Something we need to add to our online docs.
• Tweaked systemd unit to use Type=notify and not use synctl. The first is to assure that the server has fully started (listens on 8008) before systemctl start command returns, else the user registration on install can fail, on slow devices or when input is done fast. The second reduces memory usage by ~70 MiB used by synctl itself. I think this is a console tool and intended only as such to interactively manage Synapse processes, which is why it defaults to daemonise the server etc. It's much more direct to call the Python module itself. Or did you face any issue with that?

[MichaIng]

Merging now to avoid conflicts with youtube-dl.

[tandy-1000]

* Changed PostgreSQL default (on Buster and up) to not listen on TCP/IP anymore but UNIX domain socket only and adjusted Synapse accordingly. This reduces overhead/memory usage a little and provides ~30% faster communication. Since Synapse is the first and only dependant, this is a unique chance to implement this as default right from the start. Something we need to add to our online docs.

This caused some issues for me on non-DietPi services which used PostgreSQL until I found this PR.

[Joulinar]

You are on 7.4 Beta?

[MichaIng]

Yes, this has not yet been released and it won't affect manually installed instances of PostgreSQL (e.g. apt install postgresql). While it is generally recommended to use UNIX sockets for local service connections, it will be easy and documented how to re-enable it and how to allow also remote TCP/IP connections to PostgreSQL, as for security reasons on Debian it listens only on localhost/loopback IP.