sync

hosts/odroid6/default.nix

@@ -9,10 +9,12 @@
     ./hardware-configuration.nix
     ../../modules/odroid-m1-setleds.nix
     ../../modules/odroid-m1.nix
+    ../../modules/keepalived.nix
   ];
 
   nixpkgs.hostPlatform.system = "aarch64-linux";
   networking.hostName = "odroid6";
+  custom.VIP_Priority = 100;
   networking.interfaces.end0.ipv4.addresses = [
     {
       address = "192.168.4.226";

hosts/odroid7/default.nix

@@ -9,6 +9,7 @@
     ./hardware-configuration.nix
 ../../modules/odroid-m1-setleds.nix
     ../../modules/odroid-m1.nix
+        ../../modules/keepalived.nix
   ];
 
   nixpkgs.hostPlatform.system = "aarch64-linux";

hosts/odroid8/default.nix

@@ -10,6 +10,7 @@
     ../../modules/odroid-m1-setleds.nix
     ../../modules/odroid-m1.nix
     ../../modules/cifs.nix
+        ../../modules/keepalived.nix
   ];
 
   nixpkgs.hostPlatform.system = "aarch64-linux";

hosts/opti1/default.nix

@@ -7,11 +7,13 @@
 }: {
   imports = [
     ./hardware-configuration.nix
+    # ../../modules/keepalived.nix
   ];
 
   nixpkgs.hostPlatform.system = "x86_64-linux";
   networking.hostName = "opti1";
-
+  # custom._Networkinterface = "enp0s31f6";
+  # custom.VIP_Priority = 100;
   networking.interfaces.end0.ipv4.addresses = [
     {
       address = "192.168.4.36";
@@ -19,6 +21,8 @@
     }
   ];
 
+
+
   networking.defaultGateway = "192.168.4.1";
   networking.nameservers = ["192.168.4.1" "8.8.8.8"];
     # Bootloader.

hosts/opti1/hardware-configuration.nix

@@ -12,7 +12,11 @@
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
-
+  boot.kernelParams = [ "net.ifnames=0" "biosdevname=1" ];
+  systemd.network.links."10-custom-ethernet" = {
+    matchConfig.MACAddress = "d8:9e:f3:83:df:d6";
+    linkConfig.Name = "end0";
+  };
   fileSystems."/" =
     { device = "/dev/disk/by-uuid/7245da7d-e72b-403a-8b72-e99cdd8c02fa";
       fsType = "ext4";
@@ -27,7 +31,7 @@
   networking.useDHCP = lib.mkDefault true;
   # networking.interfaces.enp0s31f6.useDHCP = lib.mkDefault true;
   # networking.interfaces.wlp0s20f0u3.useDHCP = lib.mkDefault true;
-
+  # networking.usePredictableInterfaceNames = true;
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
   hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
 }

justfile

@@ -8,7 +8,7 @@ deploy-dry NODE:
 	nixos-rebuild --flake .#{{NODE}} --fast --target-host root@{{NODE}}.node.dc1.consul --build-host root@{{NODE}}.node.dc1.consul dry-activate
 
 deploy-all: 
-    just deploy odroid5
+    just deploy opti1
     just deploy odroid6
     just deploy odroid7
     just deploy odroid8

modules/common.nix

@@ -10,7 +10,6 @@
     # ./mnt-clusterstore.nix
     ./nomad.nix
     ./consul.nix
-    ./cifs.nix
     inputs.sops-nix.nixosModules.sops
   ];
 
@@ -21,6 +20,20 @@
     description = "Path to the Secrets storage";
   };
 
+  options.custom._Networkinterface = lib.mkOption {
+    type = lib.types.str;
+    default = "end0";
+    description = "Network interface name to bind to.";
+    example = "enp3s0";
+  };
+
+  options.custom.VIP_Priority = lib.mkOption {
+    type = lib.types.int;
+    default = 50;
+    description = "Keep alived prority for voting";
+  };
+
+
   config = {
     system.stateVersion = "23.11"; # Did you read the comment?
     nixpkgs.config.allowUnfree = true;

modules/consul.nix

@@ -6,6 +6,8 @@
   ...
 }: let
   secretstore = config._secretstore;
+  NetworkInterface = config.custom._Networkinterface;
+
   # oldpkgs = import (builtins.fetchGit {
   #   # Descriptive name to make the store path easier to identify
   #   name = "git_consul_1_9";
@@ -25,6 +27,9 @@ in {
     format = "binary";
     owner = "consul";
     group = "consul";
+
+
+
   };
 
   networking.firewall = {
@@ -37,7 +42,7 @@ in {
     enable = true;
     webUi = true;
     # consulAddr = "0.0.0.0:8500";
-    interface.bind = "end0";
+    interface.bind = "${NetworkInterface}";
     extraConfigFiles = [config.sops.secrets."consul_encrypt.json".path];
     extraConfig = {
       bootstrap = false;
@@ -54,18 +59,19 @@ in {
         raft_multiplier = 7;
       };
       recursors = [
-        "192.168.1.1"
+        "192.168.4.1"
         "8.8.8.8"
       ];
 
       retry_join = [
-        "192.168.1.221"
-        "192.168.1.222"
-        "192.168.1.225"
-        "192.168.1.226"
-        "192.168.1.227"
-        "192.168.1.223"
-        "192.168.1.224"
+        "192.168.4.221"
+        "192.168.4.222"
+        "192.168.4.225"
+        "192.168.4.226"
+        "192.168.4.227"
+        "192.168.4.223"
+        "192.168.4.224"
+        "192.168.4.36"
       ];
     };
   };

modules/keepalived.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, lib, ... }:
+with lib; let
+  NetworkInterface = config.custom._Networkinterface;
+  VIP_Priority = config.custom.VIP_Priority;
+in {
+
+
+  services.keepalived = {
+    enable = true;
+    openFirewall = true;
+    vrrpInstances.VIP_250 = {
+        interface = "${NetworkInterface}";
+        virtualRouterId  = 51;
+        priority = VIP_Priority;
+        unicastPeers = ["192.168.4.226" "192.168.4.227" "192.168.4.228" "192.168.4.36"];
+        virtualIps = [{addr = "192.168.4.250/22";}];
+          
+      };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 80 443 ]; # optional
+}