apt update/upgrade Configuration file '/etc/matrix-synapse/homeserver.yaml' ==> Modified (by you or by a script) since installation.

Description: would it be possible to support a local configuration, eg: homeserver.yaml.local

the values defined in .local would overwrite anything specificed in the main homeserver.yaml

This way I can leave homeserver.yaml untouched and will not be prompted what to do when updating the server. (or if there is another way to accomplish the same result, please let me know, thank you.)

when I perform an apt update of my synapse install. I am always prompted:

Setting up matrix-synapse-py3 (1.46.0+focal1) …

Configuration file '/etc/matrix-synapse/homeserver.yaml'
 ==> Modified (by you or by a script) since installation.
 ==> Package distributor has shipped an updated version.
   What would you like to do about it ?  Your options are:
    Y or I  : install the package maintainer's version
    N or O  : keep your currently-installed version
      D     : show the differences between the versions
      Z     : start a shell to examine the situation
 The default action is to keep your current version.
*** homeserver.yaml (Y/I/N/O/D/Z) [default=N] ?

[reivilibre]

There is already such a place: the whole directory /etc/matrix-synapse/conf.d/ will have configuration files loaded. You’ll notice that, after setting up, there will already be one file in there which contains your server’s name. You’re free to add more files there so you can avoid changing the main configuration file.

(You only need to write out the configuration values that you want to change)

[richvdh]

this is a duplicate of https://github.com/matrix-org/synapse/issues/8159.