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{ config, pkgs, ... }:
#
# a homeserver for matrix.org.
#
# this uses the config.networking.domain as the ACME host. be sure to add the
# fqdn and element subdomains to security.acme.certs.<name>.extraDomainNames
#
# - nixos manual: https://nixos.org/nixos/manual/index.html#module-services-matrix
#
# to create new users:
#
# nix run nixpkgs.matrix-synapse
# register_new_matrix_user -k <registration_shared_secret> http://localhost:<matrix_port>
#
let
fqdn = "matrix.${config.networking.domain}";
element = "chat.${config.networking.domain}";
matrix_port = 8448;
in {
# matrix-synapse server. for what the settings mean, see:
# https://nixos.org/nixos/manual/index.html#module-services-matrix
#
services.matrix-synapse = {
enable = true;
server_name = config.networking.domain;
registration_shared_secret = "AkGRWSQLga3RoKRFnHhKoeCEIeZzu31y4TRzMRkMyRbBnETkVTSxilf24qySLzQn";
listeners = [
{
port = matrix_port;
bind_address = "::1";
type = "http";
tls = false;
x_forwarded = true;
resources = [
{
names = [ "client" "federation" ];
compress = false;
}
];
}
];
};
# matrix needs a database
#
services.postgresql.enable = true;
# web proxy for the matrix server
#
services.nginx = {
enable = true;
recommendedTlsSettings = true;
recommendedOptimisation = true;
recommendedGzipSettings = true;
recommendedProxySettings = true;
virtualHosts = {
# route to matrix-synapse
"${config.networking.domain}" = {
locations."= /.well-known/matrix/server".extraConfig =
let
server = { "m.server" = "${fqdn}:443"; };
in ''
add_header Content-Type application/json;
return 200 '${builtins.toJSON server}';
'';
locations."= /.well-known/matrix/client".extraConfig =
let
client = {
"m.homeserver" = { "base_url" = "https://${fqdn}"; } ;
"m.identity_server" = { "base_url" = "https://vector.im"; };
};
in ''
add_header Content-Type application/json;
add_header Access-Control-Allow-Origin *;
return 200 '${builtins.toJSON client}';
'';
};
# reverse proxy for matrix client-server and server-server communication
"${fqdn}" = {
forceSSL = true;
useACMEHost = config.networking.domain;
locations."/".extraConfig = ''
return 404;
'';
locations."/_matrix" = {
proxyPass = "http://[::1]:${toString matrix_port}";
};
};
};
};
# matrix client, available at chat.simatime.com
#
# note that element and matrix-synapse must be on separate fqdn's to
# protect from XSS attacks:
# https://github.com/vector-im/element-web#important-security-note
#
services.nginx.virtualHosts."${element}" = {
useACMEHost = config.networking.domain;
forceSSL = true;
root = pkgs.element-web;
};
}
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