add etherpad to arachnide server and fix internet access from nixos-containers

config/arachnide/configuration.nix

@@ -14,6 +14,7 @@
       /var/src/modules/forgejo.nix
       /var/src/modules/forgejo-runner.nix
       /var/src/modules/nextcloud.nix
+      /var/src/modules/etherpad.nix
     ];
 
   # Bootloader.
@@ -70,6 +71,10 @@
     address-prefix = "/24";
   };
 
+  nixin.etherpad = {
+    domain = "pad.lab12.fr";
+  };
+
 
   # Enable ip forwarding to route packets for the local network connected to enp3s0  
   boot.kernel.sysctl = {

config/arachnide/network-configuration.nix

@@ -12,6 +12,15 @@
     useDHCP = false;
     defaultGateway = "192.168.36.1";
 
+    nat = {
+      enable = true;
+      #internalInterfaces = ["vb-+"];
+      internalIPs = ["10.10.10.0/24"];
+      externalInterface = "enp1s0";
+      # Lazy IPv6 connectivity for the containers
+      #enableIPv6 = true;
+    };
+
     # bridge for containers
     bridges = {
       "br0" = {

modules/etherpad.nix

@@ -0,0 +1,33 @@
+# Forgejo
+{ config, pkgs, lib, ... }:
+
+let
+  inherit (lib) mkOption mkDefault;
+in
+{
+  options = {
+    nixin.etherpad = {
+      domain = mkOption { type = lib.types.str; };
+    };
+  };
+
+  config = {
+    networking.hosts = {
+      "127.0.0.1" = [ "${config.nixin.etherpad.domain}" ];
+    };
+
+    # Etherpad is not yes packaged for nixos, so deploy it using docker
+    virtualisation.oci-containers.containers.etherpad = {
+      autoStart = true;
+      image = "etherpad/etherpad";
+      extraOptions = [
+        "--label=traefik.enable=true"
+        "--label=traefik.http.routers.etherpad.entrypoints=websecure"
+        "--label=traefik.http.routers.etherpad.rule=Host(`${config.nixin.etherpad.domain}`)"
+        "--label=traefik.http.routers.etherpad.tls=true"
+        "--label=traefik.http.services.etherpad.loadbalancer.server.port=9001"
+        "--label=traefik.http.routers.etherpad.tls.certresolver=acme-challenge"
+      ];
+    };
+  };
+}

modules/nextcloud.nix

@@ -67,6 +67,9 @@ in
       };
     };
 
+    networking.firewall.extraCommands = ''
+      iptables -w -t nat -A POSTROUTING -s ${config.containers.nextcloud.localAddress} -j MASQUERADE
+    '';
 
     services.traefik.dynamicConfigOptions.http.services."service-nextcloud" = {
       loadBalancer.servers = [

modules/reverse-proxy-traefik.nix

@@ -82,22 +82,5 @@ in
       middlewares = [ "wg-whitelist" ];
       entryPoints = [ "websecure" ];
     };
-
-
-    # You can find and example proxy for a non-docker service in the nixin-web.nix module 
-
-    # Example docker service with traefik proxy enabled through labels
-    # virtualisation.oci-containers.containers.whoami = {
-    #   autoStart = true;
-    #   image = "jwilder/whoami";
-    #   extraOptions = [
-    #     "--label=traefik.enable=true"
-    #     "--label=traefik.http.routers.whoami.entrypoints=websecure"
-    #     "--label=traefik.http.routers.whoami.rule=Host(`whoami.domain.tld`)"
-    #     "--label=traefik.http.routers.whoami.tls=true"
-    #     "--label=traefik.http.services.whoami.loadbalancer.server.port=8000"
-    #     "--label=traefik.http.routers.whoami.tls.certresolver=acme-challenge"
-    #   ];
-    # };
   };
 }