From f57dc498fa6a59c2e0b0a77d0ec161fbf723e82b Mon Sep 17 00:00:00 2001
From: Giovanni d'Amelio <gio@damelio.net>
Date: Sun, 5 Jan 2025 15:23:18 -0800
Subject: [PATCH] Start of config for manganese

---
 homelab.toml                                  |  8 +++
 src/nixosConfigurations/manganese.nix         | 15 ++++
 .../machines/manganese/default.nix            | 45 ++++++++++++
 src/nixosModules/machines/manganese/disko.nix | 70 +++++++++++++++++++
 .../machines/manganese/hardware.nix           | 32 +++++++++
 5 files changed, 170 insertions(+)
 create mode 100644 src/nixosConfigurations/manganese.nix
 create mode 100644 src/nixosModules/machines/manganese/default.nix
 create mode 100644 src/nixosModules/machines/manganese/disko.nix
 create mode 100644 src/nixosModules/machines/manganese/hardware.nix

diff --git a/homelab.toml b/homelab.toml
index 94ddcf7..301565e 100644
--- a/homelab.toml
+++ b/homelab.toml
@@ -49,6 +49,14 @@ useDescription = "Main NAS in the closet"
 targetHost = "10.0.128.214"
 targetUser = "server"
 
+[machines.manganese]
+hardwareDescription = ""
+useDescription = "Handling all our monitoring as reliably as possible"
+
+[machines.carbon.deployment]
+targetHost = "10.0.246.179"
+targetUser = "server"
+
 [machines.zirconium]
 hardwareDescription = "VM Running in Hetzner Cloud"
 useDescription = "Critical services running on a DigitalOcean VM"
diff --git a/src/nixosConfigurations/manganese.nix b/src/nixosConfigurations/manganese.nix
new file mode 100644
index 0000000..1e889b2
--- /dev/null
+++ b/src/nixosConfigurations/manganese.nix
@@ -0,0 +1,15 @@
+{
+  root,
+  inputs,
+  ...
+}:
+inputs.nixpkgs.lib.nixosSystem {
+  system = "x86_64-linux";
+
+  extraModules = [
+    # Not sure why this has to be an extraModule instead of a regular module
+    inputs.colmena.nixosModules.deploymentOptions
+  ];
+
+  modules = [root.nixosModules.machines.manganese.default];
+}
diff --git a/src/nixosModules/machines/manganese/default.nix b/src/nixosModules/machines/manganese/default.nix
new file mode 100644
index 0000000..732b054
--- /dev/null
+++ b/src/nixosModules/machines/manganese/default.nix
@@ -0,0 +1,45 @@
+{
+  root,
+  super,
+  homelab,
+  ...
+}: _: {
+  imports = [
+    # Disk layout
+    super.disko
+
+    # Hardware
+    super.hardware
+
+    # Basic packages I want on every system
+    root.nixosModules.basic-packages
+    root.nixosModules.basic-settings
+
+    # Add server user
+    root.nixosModules.users.server
+
+    # Autosnapshot ZFS and send to NAS
+    # root.nixosModules.core.zfs-backup
+    # (_: {
+    #   gio.services.zfs_backup = {
+    #     enable = true;
+    #     syncToGallium = true;
+    #     datasets = [
+    #       "tank/home"
+    #       "tank/nix"
+    #       "tank/root"
+    #     ];
+    #   };
+    # })
+
+    ({pkgs, ...}: {
+      networking.hostId = "cf399625";
+
+      # ZFS snapshot browsing
+      environment.systemPackages = [pkgs.httm];
+
+      # Load the deployment config from our homelab.toml
+      inherit (homelab.machines.manganese) deployment;
+    })
+  ];
+}
diff --git a/src/nixosModules/machines/manganese/disko.nix b/src/nixosModules/machines/manganese/disko.nix
new file mode 100644
index 0000000..ff2ba5b
--- /dev/null
+++ b/src/nixosModules/machines/manganese/disko.nix
@@ -0,0 +1,70 @@
+{inputs, ...}: {
+  imports = [
+    inputs.disko.nixosModules.disko
+  ];
+
+  config = {
+    disko.devices = {
+      disk = {
+        main = {
+          type = "disk";
+          device = "/dev/disk/by-id/ata-SanDisk_SDSSDA120G_173948453212";
+          content = {
+            type = "gpt";
+            partitions = {
+              ESP = {
+                size = "1G";
+                type = "EF00";
+                content = {
+                  type = "filesystem";
+                  format = "vfat";
+                  mountpoint = "/boot";
+                };
+              };
+              zfs = {
+                size = "100%";
+                content = {
+                  type = "zfs";
+                  pool = "tank";
+                };
+              };
+            };
+          };
+        };
+      };
+      zpool = {
+        tank = {
+          type = "zpool";
+          postCreateHook = "zfs snapshot tank@blank";
+          rootFsOptions = {
+            compression = "zstd";
+            mountpoint = "none";
+          };
+
+          datasets = {
+            reserve = {
+              type = "zfs_fs";
+              options = {
+                mountpoint = "none";
+                reservation = "5G";
+              };
+            };
+            root = {
+              type = "zfs_fs";
+              mountpoint = "/";
+              postCreateHook = "zfs snapshot tank/root@blank";
+            };
+            nix = {
+              type = "zfs_fs";
+              mountpoint = "/nix";
+            };
+            home = {
+              type = "zfs_fs";
+              mountpoint = "/home";
+            };
+          };
+        };
+      };
+    };
+  };
+}
diff --git a/src/nixosModules/machines/manganese/hardware.nix b/src/nixosModules/machines/manganese/hardware.nix
new file mode 100644
index 0000000..2e9eec6
--- /dev/null
+++ b/src/nixosModules/machines/manganese/hardware.nix
@@ -0,0 +1,32 @@
+_: {
+  config,
+  lib,
+  ...
+}: {
+  boot.initrd.availableKernelModules = ["ahci" "xhci_pci" "usb_storage" "usbhid" "sd_mod" "sdhci_pci"];
+  boot.initrd.kernelModules = [];
+  boot.kernelModules = ["kvm-intel"];
+  boot.extraModulePackages = [];
+
+  networking.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  time.timeZone = "America/Los_Angeles";
+
+  networking.hostName = "manganese";
+
+  boot.loader = {
+    systemd-boot = {
+      enable = true;
+      consoleMode = "auto";
+      netbootxyz.enable = true;
+    };
+
+    efi.canTouchEfiVariables = true;
+  };
+  boot.zfs.forceImportRoot = false;
+  boot.supportedFilesystems = ["zfs"];
+  boot.initrd.supportedFilesystems = ["zfs"];
+}