From fbfff0e1a7d8421ab998b0e2caed6afe809e1f2d Mon Sep 17 00:00:00 2001
From: schweby <schweby@disroot.org>
Date: Mon, 1 Feb 2021 16:20:08 +0100
Subject: [PATCH] hainich/matrix: init matrix & element

---
 hosts/hainich/configuration.nix           |   3 +-
 hosts/hainich/services/matrix-synapse.nix | 106 ++++++++++++++++++++++
 2 files changed, 107 insertions(+), 2 deletions(-)
 create mode 100644 hosts/hainich/services/matrix-synapse.nix

diff --git a/hosts/hainich/configuration.nix b/hosts/hainich/configuration.nix
index 5cc94e0..322b5ea 100644
--- a/hosts/hainich/configuration.nix
+++ b/hosts/hainich/configuration.nix
@@ -9,9 +9,7 @@
     ./services/mail.nix
     ./services/codimd.nix
     ../../common
-#   ./wireguard.nix
     ./services/nginx.nix
-#   ./k8s.nix
     ./services/docker.nix
     ./services/gitlab-runner.nix
     ./services/lantifa.nix
@@ -19,6 +17,7 @@
     ./services/syncthing.nix
     ./services/monitoring.nix
     ./services/workadventure.nix
+    ./services/matrix-synapse.nix
   ];
   boot.loader.grub.enable = true;
   boot.loader.grub.version = 2;
diff --git a/hosts/hainich/services/matrix-synapse.nix b/hosts/hainich/services/matrix-synapse.nix
new file mode 100644
index 0000000..dde8f7f
--- /dev/null
+++ b/hosts/hainich/services/matrix-synapse.nix
@@ -0,0 +1,106 @@
+{config, lib, pkgs, ... }:
+{
+  networking.firewall.allowedTCPPorts = [ 80 443 ];
+
+  services.postgresql.enable = true;
+  services.postgresql.initialScript = pkgs.writeText "synapse-init.sql" ''
+    CREATE ROLE "matrix-synapse" WITH LOGIN PASSWORD 'synapse';
+    CREATE DATABASE "matrix-synapse" WITH OWNER "matrix-synapse"
+      TEMPLATE template0
+      LC_COLLATE = "C"
+      LC_CTYPE = "C";
+  '';
+
+  services.nginx = {
+    enable = true;
+    # only recommendedProxySettings and recommendedGzipSettings are strictly required,
+    # but the rest make sense as well
+    recommendedTlsSettings = true;
+    recommendedOptimisation = true;
+    recommendedGzipSettings = true;
+    recommendedProxySettings = true;
+
+    virtualHosts = {
+      # This host section can be placed on a different host than the rest,
+      # i.e. to delegate from the host being accessible as ${config.networking.domain}
+      # to another host actually running the Matrix homeserver.
+      "hacc.space" = {
+        locations."= /.well-known/matrix/server".extraConfig =
+          let
+            # use 443 instead of the default 8448 port to unite
+            # the client-server and server-server port for simplicity
+            server = { "m.server" = "matrix.hacc.space:443"; };
+          in ''
+            add_header Content-Type application/json;
+            return 200 '${builtins.toJSON server}';
+          '';
+        locations."= /.well-known/matrix/client".extraConfig =
+          let
+            client = {
+              "m.homeserver" =  { "base_url" = "https://matrix.hacc.space"; };
+              "m.identity_server" =  { "base_url" = "https://vector.im"; };
+            };
+          # ACAO required to allow element-web on any URL to request this json file
+          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
+      "matrix.hacc.space" = {
+        enableACME = true;
+        forceSSL = true;
+
+        # Or do a redirect instead of the 404, or whatever is appropriate for you.
+        # But do not put a Matrix Web client here! See the Element web section below.
+        locations."/".extraConfig = ''
+          return 404;
+        '';
+
+        # forward all Matrix API calls to the synapse Matrix homeserver
+        locations."/_matrix" = {
+          proxyPass = "http://[::1]:8008"; # without a trailing /
+        };
+      };
+    };
+  };
+
+  services.matrix-synapse = {
+    enable = true;
+    server_name = "matrix.hacc.space";
+    listeners = [
+      {
+        port = 8008;
+        bind_address = "::1";
+        type = "http";
+        tls = false;
+        x_forwarded = true;
+        resources = [
+          {
+            names = [ "client" "federation" ];
+            compress = false;
+          }
+        ];
+      }
+    ];
+  };
+
+  services.nginx.virtualHosts."element.matrix.hacc.space" = {
+    enableACME = true;
+    forceSSL = true;
+    serverAliases = [
+      "element.hacc.space"
+    ];
+
+    root = pkgs.element-web.override {
+      conf = {
+        default_server_config."m.homeserver" = {
+          "base_url" = "matrix.hacc.space";
+          "server_name" = "matrix.hacc.space";
+        };
+      };
+    };
+  };
+}