Files
nixos/hosts/unstable/linode/default.nix
T
root 792217f640
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buildbot/nix-build gitea:greg/nixos#checks.x86_64-linux.nixos-genesis Build done.
buildbot/nix-build gitea:greg/nixos#checks.x86_64-linux.nixos-linode Build done.
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buildbot/nix-build gitea:greg/nixos#checks.x86_64-linux.nixos-zeke Build done.
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feat: add Nebula mesh network overlay
Introduces a greg.nebula NixOS module and enables it across all managed
hosts for the nebula.thehellings.com overlay (CIDR: 10.157.0.0/16).

Architecture:
- linode: lighthouse + relay (public internet, UDP 4242)
- genesis: regular node + unsafe_routes router for 10.42.0.0/16 (home LAN)
- hosea, isaiah, jeremiah, zeke, exodus: regular nodes with unsafe_routes
  pointing to genesis to reach the home LAN

Changes:
- modules/nixos/nebula.nix: new greg.nebula module
  - isLighthouse / isRelay options
  - unsafeRoutes option (tun.unsafe_routes)
  - routesSubnet option: enables IP forwarding + nftables masquerade NAT
    on the gateway host (genesis) so Nebula peers reach 10.42.0.0/16
  - agenix secret reference per-host (secrets/nebula/<name>.key.age)
  - opens UDP/4242 in the firewall
- modules/nixos/default.nix: import nebula.nix
- hosts/unstable/linode/default.nix: greg.nebula.isLighthouse = true
- hosts/unstable/genesis/default.nix: greg.nebula.routesSubnet = "10.42.0.0/16"
- hosts/unstable/{hosea,isaiah,jeremiah,zeke,exodus}/default.nix:
  greg.nebula.enable = true with unsafeRoutes via genesis
- network.json: add nebulaIp field for each managed host
- secrets/secrets.nix: declare nebula/<host>.key.age entries
- secrets/nebula/README.md: full PKI bootstrap guide (CA, certs, agenix)
2026-03-28 23:24:52 -05:00

79 lines
1.5 KiB
Nix

{
pkgs,
lib,
config,
...
}:
{
imports = [
./git.nix
./hardware-configuration.nix
./podman.nix
./matrix.nix
./nextcloud.nix
./nginx.nix
./postgres.nix
];
environment.systemPackages = with pkgs; [
bind
graphviz
nix-du
pgloader
];
greg = {
home = false;
linode.enable = true;
nebula = {
enable = true;
isLighthouse = true;
};
proxies."immich.thehellings.com" = {
genAliases = false;
target = "http://localhost:${builtins.toString config.services.immich-public-proxy.port}";
ssl = true;
};
tailscale.enable = true;
};
networking = {
networkmanager.enable = lib.mkForce false;
hostName = "linode";
domain = "thehellings.com";
nameservers = [ "100.88.91.27" ];
};
programs.ssh.extraConfig = lib.strings.concatStringsSep "\n" [
"Host chronicles.shire-zebra.ts.net"
" User backup"
" IdentityFile /etc/ssh/backup_ed25519"
" StrictHostKeyChecking no"
" UserKnownHostsFile /dev/null"
];
services = {
immich-public-proxy = {
enable = true;
immichUrl = "https://immich.shire-zebra.ts.net";
};
};
security.sudo.extraRules = [
{
users = [ "gitlab-runner" ];
commands = [
{
command = "/run/current-system/sw/bin/systemctl";
options = [ "NOPASSWD" ];
}
{
command = "/run/current-system/sw/bin/podman";
options = [ "NOPASSWD" ];
}
];
}
];
}