Commit Graph
4 Commits
Author SHA1 Message Date
Greg Hellings 985dd927c4 chore: move from attic to niks3
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2026-05-12 21:25:24 -05:00
Greg Hellings a1bef073cf fix: generate linode certs
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2026-04-01 17:20:46 -05:00
Greg Hellings 2bb0177ffa chore: add encrypted keys and unencrypted certs
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2026-04-01 16:33:59 -05:00
root 792217f640 feat: add Nebula mesh network overlay
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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