docs: remove instruction plan

README.md

@@ -0,0 +1,413 @@
+# nix-nodeiwest
+
+NixOS flake for NodeiWest VPS provisioning and ongoing deployment.
+
+This repo currently provisions NixOS hosts with:
+
+- the `nodeiwest` employee helper CLI for safe provisioning
+- shared base config in `modules/nixos/common.nix`
+- Tailscale bootstrap via OpenBao AppRole in `modules/nixos/tailscale-init.nix`
+- Home Manager profile in `modules/home.nix`
+- disk partitioning via `disko`
+- deployment via `colmena`
+
+## Current Model
+
+- Employees should use `nodeiwest` as the supported provisioning interface
+- New machines are installed with `nixos-anywhere`
+- Ongoing changes are deployed with `colmena`
+- Hosts authenticate to OpenBao as clients
+- Tailscale auth keys are fetched from OpenBao namespace `it`, path `tailscale`, field `auth_key`
+- Public SSH must work independently of Tailscale for first access and recovery
+
+## Repo Layout
+
+```text
+flake.nix
+hosts/
+  vps[X]/
+    configuration.nix
+    disko.nix
+    hardware-configuration.nix
+modules/
+  home.nix
+  helpers/
+    home.nix
+  nixos/
+    common.nix
+    tailscale-init.nix
+pkgs/
+  helpers/
+    cli.py
+    templates/
+```
+
+## Recommended Workflow
+
+The supported employee path is the `nodeiwest` CLI.
+
+It is exported from the root flake as `.#nodeiwest-helper` and installed by the shared Home Manager profile. You can also run it ad hoc with:
+
+```bash
+nix run .#nodeiwest-helper -- --help
+```
+
+Recommended sequence for a new VPS:
+
+### 1. Probe The Live Host
+
+```bash
+nodeiwest host probe --ip <ip>
+```
+
+This validates SSH reachability and derives the boot mode, root device, primary disk candidate, and swap facts from the live machine.
+
+### 2. Scaffold The Host Files
+
+Dry-run first:
+
+```bash
+nodeiwest host init --name <name> --ip <ip>
+```
+
+Write after reviewing the plan:
+
+```bash
+nodeiwest host init --name <name> --ip <ip> --apply
+```
+
+This command:
+
+- probes the host unless you override disk or boot mode
+- creates or updates `hosts/<name>/configuration.nix`
+- creates or updates `hosts/<name>/disko.nix`
+- creates `hosts/<name>/hardware-configuration.nix` as a placeholder if needed
+- prints the exact `flake.nix` snippets still required for `nixosConfigurations` and `colmena`
+
+### 3. Create The OpenBao Bootstrap Material
+
+Dry-run first:
+
+```bash
+nodeiwest openbao init-host --name <name>
+```
+
+Apply after reviewing the policy and AppRole plan:
+
+```bash
+nodeiwest openbao init-host --name <name> --apply
+```
+
+This verifies your existing `bao` login, creates the host policy and AppRole, and writes:
+
+- `bootstrap/var/lib/nodeiwest/openbao-approle-role-id`
+- `bootstrap/var/lib/nodeiwest/openbao-approle-secret-id`
+
+### 4. Plan Or Run The Install
+
+```bash
+nodeiwest install plan --name <name>
+nodeiwest install run --name <name> --apply
+```
+
+`install plan` validates the generated host files and bootstrap files, then prints the exact `nixos-anywhere` command. `install run` re-validates, asks for confirmation, and executes that command.
+
+### 5. Verify First Boot And Colmena Readiness
+
+```bash
+nodeiwest verify host --name <name> --ip <ip>
+nodeiwest colmena plan --name <name>
+```
+
+`verify host` summarizes the first-boot OpenBao and Tailscale services over SSH. `colmena plan` confirms the deploy target or prints the exact missing host stanza.
+
+## Manual Flow (Fallback / Advanced)
+
+This is the underlying sequence that `nodeiwest` automates. Keep it as the fallback path for unsupported host layouts or when you intentionally want to run the raw commands yourself.
+
+### 1. Prepare The Host Entry
+
+Create a new directory under `hosts/<name>/` with:
+
+- `configuration.nix`
+- `disko.nix`
+- `hardware-configuration.nix`
+
+`configuration.nix` should import both `disko.nix` and `hardware-configuration.nix`.
+
+Example:
+
+```nix
+{ lib, ... }:
+{
+  imports = [
+    ./disko.nix
+    ./hardware-configuration.nix
+  ];
+
+  networking.hostName = "vps1";
+  networking.useDHCP = lib.mkDefault true;
+
+  time.timeZone = "UTC";
+
+  boot.loader.efi.canTouchEfiVariables = true;
+  boot.loader.grub = {
+    enable = true;
+    efiSupport = true;
+    device = "nodev";
+  };
+
+  nodeiwest.ssh.userCAPublicKeys = [
+    "ssh-ed25519 AAAA... openbao-user-ca"
+  ];
+
+  nodeiwest.tailscale.openbao.enable = true;
+
+  system.stateVersion = "25.05";
+}
+```
+
+### 2. Add The Host To `flake.nix`
+
+Add the host to:
+
+- `nixosConfigurations`
+- `colmena`
+
+For `colmena`, set:
+
+- `deployment.targetHost`
+- `deployment.targetUser = "root"`
+- tags as needed
+
+## Discover Disk And Boot Facts
+
+Before writing `disko.nix`, inspect the current VPS over SSH:
+
+```bash
+ssh root@<ip> 'lsblk -o NAME,SIZE,TYPE,MODEL,FSTYPE,PTTYPE,MOUNTPOINTS'
+ssh root@<ip> 'test -d /sys/firmware/efi && echo UEFI || echo BIOS'
+ssh root@<ip> 'findmnt -no SOURCE /'
+ssh root@<ip> 'cat /proc/swaps'
+```
+
+Use that output to decide:
+
+- disk device name: `/dev/sda`, `/dev/vda`, `/dev/nvme0n1`, etc.
+- boot mode: UEFI or BIOS
+- partition layout you want `disko` to create
+
+`hosts/vps1/disko.nix` currently assumes:
+
+- GPT
+- `/dev/sda`
+- UEFI
+- ext4 root
+- swap partition
+
+Do not install blindly if those assumptions are wrong.
+
+## Generate `hardware-configuration.nix`
+
+`hardware-configuration.nix` is generated during install with `nixos-anywhere`.
+
+The repo path is passed directly to the install command:
+
+```bash
+--generate-hardware-config nixos-generate-config ./hosts/<name>/hardware-configuration.nix
+```
+
+That generated file should remain tracked in Git after install.
+
+## OpenBao Setup For Tailscale
+
+Each host gets its own AppRole.
+
+The host uses:
+
+- OpenBao address: `https://secrets.api.nodeiwest.se`
+- namespace: `it`
+- auth mount: `auth/approle`
+- secret path: `tailscale`
+- field: `auth_key`
+
+The host stores:
+
+- `/var/lib/nodeiwest/openbao-approle-role-id`
+- `/var/lib/nodeiwest/openbao-approle-secret-id`
+
+The rendered Tailscale auth key lives at:
+
+- `/run/nodeiwest/tailscale-auth-key`
+
+### Create A Policy
+
+Create a minimal read-only policy for the Tailscale secret.
+
+If the secret is accessible as:
+
+```bash
+BAO_NAMESPACE=it bao kv get tailscale
+```
+
+then create the matching read policy for that mount.
+
+Example shape for a KV v2 mount named `kv`:
+
+```hcl
+path "kv/data/tailscale" {
+  capabilities = ["read"]
+}
+```
+
+Write it from your machine:
+
+```bash
+export BAO_ADDR=https://secrets.api.nodeiwest.se
+export BAO_NAMESPACE=it
+
+bao policy write tailscale-vps1 ./tailscale-vps1-policy.hcl
+```
+
+Adjust the path to match your actual OpenBao KV mount.
+
+### Create The AppRole
+
+Create one AppRole per host.
+
+Example for `vps1`:
+
+```bash
+bao write auth/approle/role/tailscale-vps1 \
+  token_policies=tailscale-vps1 \
+  token_ttl=1h \
+  token_max_ttl=24h \
+  token_num_uses=0 \
+  secret_id_num_uses=0
+```
+
+### Generate Bootstrap Credentials
+
+Create a temporary bootstrap directory on your machine:
+
+```bash
+mkdir -p bootstrap/var/lib/nodeiwest
+```
+
+Write the AppRole credentials into it:
+
+```bash
+bao read -field=role_id auth/approle/role/tailscale-vps1/role-id \
+  > bootstrap/var/lib/nodeiwest/openbao-approle-role-id
+
+bao write -f -field=secret_id auth/approle/role/tailscale-vps1/secret-id \
+  > bootstrap/var/lib/nodeiwest/openbao-approle-secret-id
+
+chmod 0400 bootstrap/var/lib/nodeiwest/openbao-approle-role-id
+chmod 0400 bootstrap/var/lib/nodeiwest/openbao-approle-secret-id
+```
+
+These files are install-time bootstrap material. They are not stored in Git.
+
+## Install With `nixos-anywhere`
+
+Install from your machine:
+
+```bash
+nix run github:nix-community/nixos-anywhere -- \
+  --extra-files ./bootstrap \
+  --copy-host-keys \
+  --generate-hardware-config nixos-generate-config ./hosts/vps1/hardware-configuration.nix \
+  --flake .#vps1 \
+  root@100.101.167.118
+```
+
+What this does:
+
+- wipes the target disk according to `hosts/vps1/disko.nix`
+- installs NixOS with `.#vps1`
+- copies the AppRole bootstrap files into `/var/lib/nodeiwest`
+- generates `hosts/vps1/hardware-configuration.nix`
+
+Important:
+
+- this destroys the existing OS on the target
+- take provider snapshots and application backups first
+- the target SSH host keys may change after install
+
+## First Boot Behavior
+
+On first boot:
+
+1. `vault-agent-tailscale.service` starts using `pkgs.openbao`
+2. it authenticates to OpenBao with AppRole
+3. it renders `auth_key` from `it/tailscale` to `/run/nodeiwest/tailscale-auth-key`
+4. `nodeiwest-tailscale-authkey-ready.service` waits until that file exists
+5. `tailscaled-autoconnect.service` uses that file and runs `tailscale up --ssh`
+
+Public SSH remains the recovery path if OpenBao or Tailscale bootstrap fails.
+
+## Verify After Install
+
+SSH to the host over the public IP first.
+
+Check:
+
+```bash
+systemctl status vault-agent-tailscale
+systemctl status nodeiwest-tailscale-authkey-ready
+systemctl status tailscaled-autoconnect
+
+ls -l /var/lib/nodeiwest
+ls -l /run/nodeiwest/tailscale-auth-key
+
+tailscale status
+```
+
+If Tailscale bootstrap fails, inspect logs:
+
+```bash
+journalctl -u vault-agent-tailscale -b
+journalctl -u nodeiwest-tailscale-authkey-ready -b
+journalctl -u tailscaled-autoconnect -b
+```
+
+Typical causes:
+
+- wrong AppRole credentials
+- wrong OpenBao policy
+- wrong secret path
+- wrong KV mount path
+- `auth_key` field missing in the secret
+
+## Deploy Changes After Install
+
+Once the host is installed and reachable, use Colmena:
+
+```bash
+nix run .#colmena -- apply --on vps1
+```
+
+## Rotating The AppRole SecretID
+
+To rotate the machine credential:
+
+1. generate a new `secret_id` from your machine
+2. replace `/var/lib/nodeiwest/openbao-approle-secret-id` on the host
+3. restart the agent
+
+Example:
+
+```bash
+bao write -f -field=secret_id auth/approle/role/tailscale-vps1/secret-id > new-secret-id
+scp new-secret-id root@100.101.167.118:/var/lib/nodeiwest/openbao-approle-secret-id
+ssh root@100.101.167.118 'chmod 0400 /var/lib/nodeiwest/openbao-approle-secret-id && systemctl restart vault-agent-tailscale tailscaled-autoconnect'
+rm -f new-secret-id
+```
+
+## Recovery Notes
+
+- Tailscale is additive. It should not be your only access path.
+- Public SSH on port `22` must remain available for first access and recovery.
+- OpenBao SSH CA auth is separate from Tailscale bootstrap.
+- If a machine fails to join the tailnet, recover via public SSH or provider console.

flake.lock

@@ -1,24 +1,136 @@
 {
   "nodes": {
-    "flake-parts": {
+    "colmena": {
       "inputs": {
-        "nixpkgs-lib": "nixpkgs-lib"
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": "nixpkgs",
+        "stable": "stable"
       },
       "locked": {
-        "lastModified": 1772408722,
-        "narHash": "sha256-rHuJtdcOjK7rAHpHphUb1iCvgkU3GpfvicLMwwnfMT0=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "f20dc5d9b8027381c474144ecabc9034d6a839a3",
+        "lastModified": 1762034856,
+        "narHash": "sha256-QVey3iP3UEoiFVXgypyjTvCrsIlA4ecx6Acaz5C8/PQ=",
+        "owner": "zhaofengli",
+        "repo": "colmena",
+        "rev": "349b035a5027f23d88eeb3bc41085d7ee29f18ed",
         "type": "github"
       },
       "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
+        "owner": "zhaofengli",
+        "repo": "colmena",
+        "type": "github"
+      }
+    },
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1773506317,
+        "narHash": "sha256-qWKbLUJpavIpvOdX1fhHYm0WGerytFHRoh9lVck6Bh0=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "878ec37d6a8f52c6c801d0e2a2ad554c75b9353c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1650374568,
+        "narHash": "sha256-Z+s0J8/r907g149rllvwhb4pKi8Wam5ij0st8PwAh+E=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "b4a34015c698c7793d592d66adbab377907a2be8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1773681856,
+        "narHash": "sha256-+bRqxoFCJFO9ZTFhcCkzNXbDT3b8AEk88fyjB7Is6eo=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "57d5560ee92a424fb71fde800acd6ed2c725dfce",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "colmena",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729742964,
+        "narHash": "sha256-B4mzTcQ0FZHdpeWcpDYPERtyjJd/NIuaQ9+BV1h+MpA=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "e04df33f62cdcf93d73e9a04142464753a16db67",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
         "type": "github"
       }
     },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1750134718,
+        "narHash": "sha256-v263g4GbxXv87hMXMCpjkIxd/viIF7p3JpJrwgKdNiI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9e83b64f727c88a7711a2c463a7b16eedb69a84c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1773628058,
         "narHash": "sha256-hpXH0z3K9xv0fHaje136KY872VT2T5uwxtezlAskQgY=",
@@ -34,26 +146,29 @@
         "type": "github"
       }
     },
-    "nixpkgs-lib": {
+    "root": {
+      "inputs": {
+        "colmena": "colmena",
+        "disko": "disko",
+        "home-manager": "home-manager",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "stable": {
       "locked": {
-        "lastModified": 1772328832,
-        "narHash": "sha256-e+/T/pmEkLP6BHhYjx6GmwP5ivonQQn0bJdH9YrRB+Q=",
-        "owner": "nix-community",
-        "repo": "nixpkgs.lib",
-        "rev": "c185c7a5e5dd8f9add5b2f8ebeff00888b070742",
+        "lastModified": 1750133334,
+        "narHash": "sha256-urV51uWH7fVnhIvsZIELIYalMYsyr2FCalvlRTzqWRw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "36ab78dab7da2e4e27911007033713bab534187b",
         "type": "github"
       },
       "original": {
-        "owner": "nix-community",
-        "repo": "nixpkgs.lib",
+        "owner": "NixOS",
+        "ref": "nixos-25.05",
+        "repo": "nixpkgs",
         "type": "github"
       }
-    },
-    "root": {
-      "inputs": {
-        "flake-parts": "flake-parts",
-        "nixpkgs": "nixpkgs"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -1,22 +1,125 @@
 {
-  description = "NodeiWest dev environment module";
+  description = "NodeiWest company flake";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-    flake-parts.url = "github:hercules-ci/flake-parts";
+    colmena.url = "github:zhaofengli/colmena";
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
-    inputs:
-    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
-      systems = [
+    inputs@{
+      self,
+      nixpkgs,
+      colmena,
+      disko,
+      home-manager,
+      ...
+    }:
+    let
+      lib = nixpkgs.lib;
+      supportedSystems = [
         "aarch64-darwin"
         "x86_64-darwin"
         "x86_64-linux"
       ];
+      forAllSystems = lib.genAttrs supportedSystems;
 
-      flake = {
-        homeManagerModules.default = ./modules/home.nix;
+      mkPkgs =
+        system:
+        import nixpkgs {
+          inherit system;
+        };
+
+      mkHost =
+        name:
+        nixpkgs.lib.nixosSystem {
+          system = "x86_64-linux";
+          specialArgs = {
+            inherit inputs self;
+          };
+          modules = [
+            disko.nixosModules.disko
+            home-manager.nixosModules.home-manager
+            self.nixosModules.common
+            ./hosts/${name}/configuration.nix
+          ];
+        };
+    in
+    {
+      homeManagerModules.default = ./modules/home.nix;
+      homeManagerModules.helpers = ./modules/helpers/home.nix;
+      nixosModules.common = ./modules/nixos/common.nix;
+
+      packages = forAllSystems (
+        system:
+        let
+          pkgs = mkPkgs system;
+          nodeiwestHelper = pkgs.callPackage ./pkgs/helpers { };
+        in
+        {
+          colmena = colmena.packages.${system}.colmena;
+          nodeiwest-helper = nodeiwestHelper;
+          default = colmena.packages.${system}.colmena;
+        }
+      );
+
+      apps = forAllSystems (system: {
+        colmena = {
+          type = "app";
+          program = "${colmena.packages.${system}.colmena}/bin/colmena";
+        };
+        nodeiwest-helper = {
+          type = "app";
+          program = "${self.packages.${system}.nodeiwest-helper}/bin/nodeiwest";
+        };
+        default = self.apps.${system}.colmena;
+      });
+
+      nixosConfigurations = {
+        vps1 = mkHost "vps1";
       };
+
+      colmena = {
+        meta = {
+          nixpkgs = mkPkgs "x86_64-linux";
+          specialArgs = {
+            inherit inputs self;
+          };
+        };
+
+        defaults =
+          { name, ... }:
+          {
+            networking.hostName = name;
+            imports = [
+              disko.nixosModules.disko
+              home-manager.nixosModules.home-manager
+              self.nixosModules.common
+            ];
+          };
+
+        vps1 = {
+          deployment = {
+            targetHost = "100.101.167.118";
+            targetUser = "root";
+            tags = [
+              "company"
+              "edge"
+            ];
+          };
+
+          imports = [ ./hosts/vps1/configuration.nix ];
+        };
+      };
+
+      colmenaHive = colmena.lib.makeHive self.outputs.colmena;
     };
 }

hosts/vps1/configuration.nix

@@ -0,0 +1,28 @@
+{ lib, ... }:
+{
+  imports = [
+    ./disko.nix
+    ./hardware-configuration.nix
+  ];
+
+  networking.hostName = "vps1";
+  networking.useDHCP = lib.mkDefault true;
+
+  time.timeZone = "UTC";
+
+  boot.loader.efi.canTouchEfiVariables = true;
+  boot.loader.grub = {
+    enable = true;
+    efiSupport = true;
+    device = "nodev";
+  };
+
+  nodeiwest.ssh.userCAPublicKeys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIE6c2oMkM7lLg9qWHVgbrFaFBDrrFyynFlPviiydQdFi openbao-user-ca"
+  ];
+  nodeiwest.tailscale.openbao = {
+    enable = true;
+  };
+
+  system.stateVersion = "25.05";
+}

hosts/vps1/disko.nix

@@ -0,0 +1,46 @@
+{
+  lib,
+  ...
+}:
+{
+  # Replace /dev/sda if the VPS exposes a different disk, e.g. /dev/vda or /dev/nvme0n1.
+  disko.devices = {
+    disk.main = {
+      type = "disk";
+      device = lib.mkDefault "/dev/sda";
+      content = {
+        type = "gpt";
+        partitions = {
+          ESP = {
+            priority = 1;
+            name = "ESP";
+            start = "1MiB";
+            end = "512MiB";
+            type = "EF00";
+            content = {
+              type = "filesystem";
+              format = "vfat";
+              mountpoint = "/boot";
+              mountOptions = [ "umask=0077" ];
+            };
+          };
+          swap = {
+            size = "4GiB";
+            content = {
+              type = "swap";
+              resumeDevice = true;
+            };
+          };
+          root = {
+            size = "100%";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/vps1/hardware-configuration.nix

@@ -0,0 +1,10 @@
+{ lib, ... }:
+{
+  # Replace this file with the generated hardware config from the target host.
+  fileSystems."/" = lib.mkDefault {
+    device = "/dev/disk/by-label/nixos";
+    fsType = "ext4";
+  };
+
+  swapDevices = [ ];
+}

modules/helpers/home.nix

@@ -0,0 +1,10 @@
+{ pkgs, ... }:
+let
+  nodeiwestHelper = pkgs.callPackage ../../pkgs/helpers { };
+in
+{
+  home.packages = [
+    pkgs.python3
+    nodeiwestHelper
+  ];
+}

modules/home.nix

@@ -1,5 +1,7 @@
 { pkgs, lib, ... }:
 {
+  imports = [ ./helpers/home.nix ];
+
   # Company env vars — available in all shells
   home.sessionVariables = {
     BAO_ADDR = "https://secrets.api.nodeiwest.se";
@@ -10,6 +12,7 @@
   home.packages = with pkgs; [
     # Tools every dev needs
     openbao
+    colmena
     # etc.
   ];
 }

modules/nixos/common.nix

@@ -0,0 +1,101 @@
+{
+  config,
+  lib,
+  self,
+  ...
+}:
+let
+  cfg = config.nodeiwest;
+  trustedUserCAKeysPath = "/etc/ssh/trusted-user-ca-keys.pem";
+in
+{
+  imports = [ ./tailscale-init.nix ];
+
+  options.nodeiwest = {
+    openbao.address = lib.mkOption {
+      type = lib.types.str;
+      default = "https://secrets.api.nodeiwest.se";
+      description = "Remote OpenBao address that hosts should use as clients.";
+      example = "https://secrets.api.nodeiwest.se";
+    };
+
+    homeManagerUsers = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [
+        "root"
+        "deploy"
+      ];
+      description = "Users that should receive the shared Home Manager company profile.";
+      example = [
+        "root"
+        "deploy"
+      ];
+    };
+
+    ssh.userCAPublicKeys = lib.mkOption {
+      type = lib.types.listOf lib.types.singleLineStr;
+      default = [ ];
+      description = "OpenBao SSH user CA public keys trusted by sshd for user certificate authentication.";
+      example = [
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBExampleOpenBaoUserCA openbao-user-ca"
+      ];
+    };
+  };
+
+  config = {
+    networking.firewall.allowedTCPPorts = [
+      22
+      80
+      443
+    ];
+
+    services.openssh = {
+      enable = true;
+      settings = {
+        PasswordAuthentication = false;
+        KbdInteractiveAuthentication = false;
+        PubkeyAuthentication = true;
+        PermitRootLogin = "prohibit-password";
+      }
+      // lib.optionalAttrs (cfg.ssh.userCAPublicKeys != [ ]) {
+        TrustedUserCAKeys = trustedUserCAKeysPath;
+      };
+    };
+
+    users.groups.deploy = { };
+    users.users.deploy = {
+      isNormalUser = true;
+      group = "deploy";
+      createHome = true;
+      extraGroups = [ "wheel" ];
+    };
+
+    services.traefik = {
+      enable = true;
+      staticConfigOptions = {
+        api.dashboard = true;
+        entryPoints.web.address = ":80";
+        entryPoints.websecure.address = ":443";
+        ping = { };
+      };
+      dynamicConfigOptions = lib.mkMerge [ ];
+    };
+
+    home-manager = {
+      useGlobalPkgs = true;
+      useUserPackages = true;
+      users = lib.genAttrs cfg.homeManagerUsers (_: {
+        imports = [ self.homeManagerModules.default ];
+        home.stateVersion = config.system.stateVersion;
+      });
+    };
+
+    environment.etc = lib.mkIf (cfg.ssh.userCAPublicKeys != [ ]) {
+      "ssh/trusted-user-ca-keys.pem".text = lib.concatStringsSep "\n" cfg.ssh.userCAPublicKeys + "\n";
+    };
+
+    environment.variables = {
+      BAO_ADDR = cfg.openbao.address;
+    };
+  };
+}

modules/nixos/tailscale-init.nix

@@ -0,0 +1,158 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.nodeiwest;
+  tailscaleOpenbaoCfg = cfg.tailscale.openbao;
+in
+{
+  options.nodeiwest.tailscale.openbao = {
+    enable = lib.mkEnableOption "fetching the Tailscale auth key from OpenBao";
+
+    namespace = lib.mkOption {
+      type = lib.types.str;
+      default = "it";
+      description = "OpenBao namespace used when fetching the Tailscale auth key.";
+    };
+
+    authPath = lib.mkOption {
+      type = lib.types.str;
+      default = "auth/approle";
+      description = "OpenBao auth mount path used by the AppRole login.";
+    };
+
+    secretPath = lib.mkOption {
+      type = lib.types.str;
+      default = "tailscale";
+      description = "OpenBao secret path containing the Tailscale auth key.";
+    };
+
+    field = lib.mkOption {
+      type = lib.types.str;
+      default = "auth_key";
+      description = "Field in the OpenBao secret that contains the Tailscale auth key.";
+    };
+
+    renderedAuthKeyFile = lib.mkOption {
+      type = lib.types.str;
+      default = "/run/nodeiwest/tailscale-auth-key";
+      description = "Runtime file rendered by OpenBao Agent and consumed by Tailscale autoconnect.";
+    };
+
+    approle = {
+      roleIdFile = lib.mkOption {
+        type = lib.types.str;
+        default = "/var/lib/nodeiwest/openbao-approle-role-id";
+        description = "Root-only file containing the OpenBao AppRole role_id.";
+      };
+
+      secretIdFile = lib.mkOption {
+        type = lib.types.str;
+        default = "/var/lib/nodeiwest/openbao-approle-secret-id";
+        description = "Root-only file containing the OpenBao AppRole secret_id.";
+      };
+    };
+  };
+
+  config = {
+    systemd.tmpfiles.rules = [
+      "d /var/lib/nodeiwest 0700 root root - -"
+      "d /run/nodeiwest 0700 root root - -"
+    ];
+
+    services.tailscale = {
+      enable = true;
+      openFirewall = true;
+      extraUpFlags = lib.optionals tailscaleOpenbaoCfg.enable [ "--ssh" ];
+      authKeyFile = if tailscaleOpenbaoCfg.enable then tailscaleOpenbaoCfg.renderedAuthKeyFile else null;
+    };
+
+    services.vault-agent.instances.tailscale = lib.mkIf tailscaleOpenbaoCfg.enable {
+      package = pkgs.openbao;
+      settings = {
+        vault.address = cfg.openbao.address;
+        auto_auth = {
+          method = [
+            {
+              type = "approle";
+              mount_path = tailscaleOpenbaoCfg.authPath;
+              namespace = tailscaleOpenbaoCfg.namespace;
+              config = {
+                role_id_file_path = tailscaleOpenbaoCfg.approle.roleIdFile;
+                secret_id_file_path = tailscaleOpenbaoCfg.approle.secretIdFile;
+                remove_secret_id_file_after_reading = false;
+              };
+            }
+          ];
+        };
+        template = [
+          {
+            contents = ''{{- with secret "${tailscaleOpenbaoCfg.secretPath}" -}}{{- if .Data.data -}}{{ index .Data.data "${tailscaleOpenbaoCfg.field}" }}{{- else -}}{{ index .Data "${tailscaleOpenbaoCfg.field}" }}{{- end -}}{{- end -}}'';
+            destination = tailscaleOpenbaoCfg.renderedAuthKeyFile;
+            perms = "0400";
+          }
+        ];
+      };
+    };
+
+    systemd.services.vault-agent-tailscale = lib.mkIf tailscaleOpenbaoCfg.enable {
+      wants = [ "network-online.target" ];
+      after = [ "network-online.target" ];
+      serviceConfig.Environment = [ "BAO_NAMESPACE=${tailscaleOpenbaoCfg.namespace}" ];
+    };
+
+    systemd.services.nodeiwest-tailscale-authkey-ready = lib.mkIf tailscaleOpenbaoCfg.enable {
+      description = "Wait for the Tailscale auth key rendered by OpenBao Agent";
+      after = [ "vault-agent-tailscale.service" ];
+      requires = [ "vault-agent-tailscale.service" ];
+      before = [ "tailscaled-autoconnect.service" ];
+      requiredBy = [ "tailscaled-autoconnect.service" ];
+      path = [ pkgs.coreutils ];
+      serviceConfig = {
+        Type = "oneshot";
+      };
+      script = ''
+        set -euo pipefail
+
+        for _ in $(seq 1 60); do
+          if [ -s ${lib.escapeShellArg tailscaleOpenbaoCfg.renderedAuthKeyFile} ]; then
+            exit 0
+          fi
+          sleep 1
+        done
+
+        echo "Timed out waiting for rendered Tailscale auth key at ${tailscaleOpenbaoCfg.renderedAuthKeyFile}" >&2
+        exit 1
+      '';
+    };
+
+    systemd.services.tailscaled-autoconnect = lib.mkIf tailscaleOpenbaoCfg.enable {
+      after = [
+        "vault-agent-tailscale.service"
+        "nodeiwest-tailscale-authkey-ready.service"
+      ];
+      requires = [
+        "vault-agent-tailscale.service"
+        "nodeiwest-tailscale-authkey-ready.service"
+      ];
+      serviceConfig.ExecStartPre = [
+        "${lib.getExe' pkgs.coreutils "test"} -s ${tailscaleOpenbaoCfg.renderedAuthKeyFile}"
+      ];
+    };
+
+    assertions = [
+      {
+        assertion =
+          (!tailscaleOpenbaoCfg.enable)
+          || (
+            tailscaleOpenbaoCfg.approle.roleIdFile != ""
+            && tailscaleOpenbaoCfg.approle.secretIdFile != ""
+          );
+        message = "AppRole roleIdFile and secretIdFile must be set when OpenBao-backed Tailscale enrollment is enabled.";
+      }
+    ];
+  };
+}

pkgs/helpers/default.nix

@@ -0,0 +1,32 @@
+{
+  lib,
+  writeShellApplication,
+  python3,
+  openbao,
+  openssh,
+  gitMinimal,
+  nix,
+}:
+writeShellApplication {
+  name = "nodeiwest";
+
+  runtimeInputs = [
+    python3
+    openbao
+    openssh
+    gitMinimal
+    nix
+  ];
+
+  text = ''
+    export NODEIWEST_HELPER_TEMPLATES=${./templates}
+    exec ${python3}/bin/python ${./cli.py} "$@"
+  '';
+
+  meta = with lib; {
+    description = "Safe VPS provisioning helper for the NodeiWest NixOS flake";
+    license = licenses.mit;
+    mainProgram = "nodeiwest";
+    platforms = platforms.unix;
+  };
+}

pkgs/helpers/templates/configuration.nix.tmpl

@@ -0,0 +1,23 @@
+{ lib, ... }:
+{
+  # Generated by nodeiwest host init.
+  imports = [
+    ./disko.nix
+    ./hardware-configuration.nix
+  ];
+
+  networking.hostName = "@@HOST_NAME@@";
+  networking.useDHCP = lib.mkDefault true;
+
+  time.timeZone = "@@TIMEZONE@@";
+
+@@BOOT_LOADER_BLOCK@@
+
+  nodeiwest.ssh.userCAPublicKeys = @@SSH_CA_KEYS@@;
+
+  nodeiwest.tailscale.openbao = {
+    enable = @@TAILSCALE_OPENBAO_ENABLE@@;
+  };
+
+  system.stateVersion = "@@STATE_VERSION@@";
+}

pkgs/helpers/templates/disko-bios-ext4.nix

@@ -0,0 +1,41 @@
+{
+  lib,
+  ...
+}:
+{
+  # Generated by nodeiwest host init.
+  # Replace the disk only if the provider exposes a different primary device.
+  disko.devices = {
+    disk.main = {
+      type = "disk";
+      device = lib.mkDefault "@@DISK_DEVICE@@";
+      content = {
+        type = "gpt";
+        partitions = {
+          BIOS = {
+            priority = 1;
+            name = "BIOS";
+            start = "1MiB";
+            end = "2MiB";
+            type = "EF02";
+          };
+          swap = {
+            size = "@@SWAP_SIZE@@";
+            content = {
+              type = "swap";
+              resumeDevice = true;
+            };
+          };
+          root = {
+            size = "100%";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+            };
+          };
+        };
+      };
+    };
+  };
+}

pkgs/helpers/templates/disko-uefi-ext4.nix

@@ -0,0 +1,47 @@
+{
+  lib,
+  ...
+}:
+{
+  # Generated by nodeiwest host init.
+  # Replace the disk only if the provider exposes a different primary device.
+  disko.devices = {
+    disk.main = {
+      type = "disk";
+      device = lib.mkDefault "@@DISK_DEVICE@@";
+      content = {
+        type = "gpt";
+        partitions = {
+          ESP = {
+            priority = 1;
+            name = "ESP";
+            start = "1MiB";
+            end = "512MiB";
+            type = "EF00";
+            content = {
+              type = "filesystem";
+              format = "vfat";
+              mountpoint = "/boot";
+              mountOptions = [ "umask=0077" ];
+            };
+          };
+          swap = {
+            size = "@@SWAP_SIZE@@";
+            content = {
+              type = "swap";
+              resumeDevice = true;
+            };
+          };
+          root = {
+            size = "100%";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+            };
+          };
+        };
+      };
+    };
+  };
+}

pkgs/helpers/templates/hardware-configuration.placeholder.nix

@@ -0,0 +1,5 @@
+{ ... }:
+{
+  # Placeholder generated by nodeiwest host init.
+  # nixos-anywhere will replace this with the generated hardware config.
+}

pkgs/helpers/templates/openbao-policy.hcl.tmpl

@@ -0,0 +1,3 @@
+path "@@POLICY_PATH@@" {
+  capabilities = ["read"]
+}

pkgs/helpers/tests/test_cli.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+import importlib.util
+import sys
+import unittest
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[3]
+CLI_PATH = REPO_ROOT / "pkgs" / "helpers" / "cli.py"
+
+spec = importlib.util.spec_from_file_location("nodeiwest_cli", CLI_PATH)
+cli = importlib.util.module_from_spec(spec)
+assert spec.loader is not None
+sys.modules[spec.name] = cli
+spec.loader.exec_module(cli)
+
+
+class HelperCliTests(unittest.TestCase):
+    def test_disk_from_device_supports_sd_and_nvme(self) -> None:
+        self.assertEqual(cli.disk_from_device("/dev/sda2"), "/dev/sda")
+        self.assertEqual(cli.disk_from_device("/dev/nvme0n1p2"), "/dev/nvme0n1")
+
+    def test_lookup_colmena_target_host_reads_existing_inventory(self) -> None:
+        flake_text = (REPO_ROOT / "flake.nix").read_text()
+        self.assertEqual(cli.lookup_colmena_target_host(flake_text, "vps1"), "100.101.167.118")
+
+    def test_parse_existing_vps1_configuration(self) -> None:
+        configuration = cli.parse_existing_configuration(REPO_ROOT / "hosts" / "vps1" / "configuration.nix")
+        self.assertEqual(configuration.host_name, "vps1")
+        self.assertEqual(configuration.boot_mode, "uefi")
+        self.assertTrue(configuration.tailscale_openbao)
+        self.assertEqual(configuration.state_version, "25.05")
+        self.assertTrue(configuration.user_ca_public_keys)
+
+    def test_parse_existing_vps1_disko(self) -> None:
+        disko = cli.parse_existing_disko(REPO_ROOT / "hosts" / "vps1" / "disko.nix")
+        self.assertEqual(disko.disk_device, "/dev/sda")
+        self.assertEqual(disko.boot_mode, "uefi")
+        self.assertEqual(disko.swap_size, "4GiB")
+
+    def test_render_bios_disko_uses_bios_partition(self) -> None:
+        rendered = cli.render_disko(boot_mode="bios", disk_device="/dev/vda", swap_size="8GiB")
+        self.assertIn('type = "EF02";', rendered)
+        self.assertIn('device = lib.mkDefault "/dev/vda";', rendered)
+        self.assertIn('size = "8GiB";', rendered)
+
+
+if __name__ == "__main__":
+    unittest.main()