repo: ./nixos -> ./os

5 files changed, 178 insertions, 0 deletions

diff --git a/os/lia/modules/lxc.nix b/os/lia/modules/lxc.nix
new file mode 100644
index 0000000..259c316
--- /dev/null
+++ b/os/lia/modules/lxc.nix
@@ -0,0 +1,41 @@
+{ pkgs, ... }: let
+  container = {
+    name = "ubu";
+    distro = "ubuntu";
+    release = "jammy";
+  };
+
+  bridge = "lan";
+in {
+  virtualisation.lxc.enable = true;
+
+  environment.systemPackages = with pkgs; [ wget ];
+  systemd.services."lxc-${container.name}-provision" = {
+    description = "auto provision ${container.name} lxc container";
+    wantedBy = [ "multi-user.target" ];
+    after = [ "network-online.target" ];
+    wants = [ "network-online.target" ];
+    stopIfChanged = false;
+
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+
+    path = with pkgs; [ wget lxc util-linux gnutar xz gawk ];
+    script = ''
+      if ! lxc-ls | grep -q ${container.name}; then
+          lxc-create -n ${container.name} -t download  -- \
+              --arch amd64 \
+              --release ${container.release} \
+              --dist ${container.distro}
+
+          sed 's/lxcbr0/${bridge}/g' -i /var/lib/lxc/${container.name}/config
+      fi
+
+      lxc-start -n ${container.name}
+    '';
+
+    preStop = "lxc-stop  --name ${container.name}";
+  };
+}
diff --git a/os/lia/modules/network/default.nix b/os/lia/modules/network/default.nix
new file mode 100644
index 0000000..c8d9059
--- /dev/null
+++ b/os/lia/modules/network/default.nix
@@ -0,0 +1,19 @@
+{ ... }: let
+  wan = "enp9s0";
+in
+{
+  imports = [
+    ./router.nix
+  ];
+
+  networking = {
+    interfaces.${wan}.ipv4.addresses = [{
+      address = "172.16.148.20";
+      prefixLength = 22;
+    }];
+    defaultGateway = {
+      address = "172.16.148.1";
+      interface = wan;
+    };
+  };
+}
diff --git a/os/lia/modules/network/router.nix b/os/lia/modules/network/router.nix
new file mode 100644
index 0000000..b8cac8c
--- /dev/null
+++ b/os/lia/modules/network/router.nix
@@ -0,0 +1,47 @@
+{ ... }: let
+  wanInterface = "enp9s0";
+  lanInterfaces = [ "enp1s0f0" "enp1s0f1" ];
+
+  prefix = 24;
+  subnet = "192.168.1.0";
+  host = "192.168.1.1";
+
+  leaseRangeStart = "192.168.1.100";
+  leaseRangeEnd = "192.168.1.254";
+  nameServer = [ "10.0.0.2" "10.0.0.3" ];
+in
+{
+  networking = {
+    bridges."lan".interfaces = lanInterfaces;
+
+    nat = {
+      enable = true;
+      externalInterface = wanInterface;
+      internalInterfaces = [ "lan" ];
+    };
+
+    interfaces.lan = {
+      ipv4.addresses = [{ 
+        address = host;
+        prefixLength  = prefix;
+      }];
+    };
+
+    firewall = {
+      allowedUDPPorts = [ 53 67 ];
+      allowedTCPPorts = [ 53 ];
+      extraCommands = 
+        "iptables -t nat -I POSTROUTING 1 -s ${subnet}/${toString prefix} -o ${wanInterface} -j MASQUERADE";
+    };
+  };
+
+  services.dnsmasq = {
+    enable = true;
+
+    settings = {
+      server = nameServer;
+      dhcp-range = [ "${leaseRangeStart},${leaseRangeEnd}" ];
+      interface = [ "lan" ];
+    };
+  };
+}
diff --git a/os/lia/modules/sshfwd.nix b/os/lia/modules/sshfwd.nix
new file mode 100644
index 0000000..3c7c006
--- /dev/null
+++ b/os/lia/modules/sshfwd.nix
@@ -0,0 +1,53 @@
+{ pkgs, config, ... }: let
+  mkFwdSrv = {
+    local_port,
+    remote_port,
+    remote_user,
+    remote ? "sinanmohd.com",
+    ssh_port ? 22,
+    key ? config.sops.secrets."sshfwd/${remote}".path,
+  }: {
+    "sshfwd-${toString local_port}-${remote}:${toString remote_port}" = {
+      description = "Forwarding port ${toString local_port} to ${remote}";
+
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      # restart rather than stop+start this unit to prevent
+      # the ssh from dying during switch-to-configuration.
+      stopIfChanged = false;
+
+      serviceConfig = {
+        ExecStart = ''
+          ${pkgs.openssh}/bin/ssh -N ${remote_user}@${remote} -p ${toString ssh_port} \
+              -R '[::]:${toString remote_port}:127.0.0.1:${toString local_port}' \
+              -o ServerAliveInterval=15 \
+              -o ExitOnForwardFailure=yes \
+              -i ${key}
+        '';
+
+        RestartSec = 3;
+        Restart = "always";
+      };
+
+    };
+  };
+in {
+  sops.secrets."sshfwd/sinanmohd.com" = {};
+  sops.secrets."sshfwd/lia.sinanmohd.com" = {};
+
+  environment.systemPackages = with pkgs; [ openssh ];
+  systemd.services
+    = (mkFwdSrv {
+        local_port = 22;
+        remote_user = "lia";
+        remote_port = 2222;
+      }) //
+      (mkFwdSrv {
+        local_port = 22;
+        remote_port = 22;
+        ssh_port = 23;
+        remote_user = "root";
+        remote = "lia.sinanmohd.com";
+      });
+}
diff --git a/os/lia/modules/users.nix b/os/lia/modules/users.nix
new file mode 100644
index 0000000..26f5dc8
--- /dev/null
+++ b/os/lia/modules/users.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }: {
+  users.users = {
+    "rohit" = {
+      isNormalUser = true;
+      extraGroups = [ "wheel" ];
+
+      packages = with pkgs; [ git htop ];
+      openssh.authorizedKeys.keys =
+        [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOZcWF1zVyxsCdZ/j+h+RlHZlyhgY2Bky03847bxFNSH rohit@victus" ];
+    };
+
+    "sharu" = {
+      isNormalUser = true;
+      openssh.authorizedKeys.keys =
+        [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMAAaAUTiM3YY7E/7lq44aX+2U0IYhp2Qntu7hINcTjF sharu@lappie" ];
+    };
+  };
+}