feat: Nebula mesh network overlay #12

Merged

greg merged 9 commits from klaatu/nixos:feat/nebula-mesh into main 2026-04-04 03:03:53 +00:00

Conversation 3 Commits 9 Files Changed 29

+623 -10

9 Commits

Author	SHA1	Message	Date
Greg Hellings	88d9234332	fix: no default routes	2026-04-02 08:11:32 -05:00
Greg Hellings	a1bef073cf	fix: generate linode certs	2026-04-01 17:20:46 -05:00
root	f35e8c755c	fix: only set listen.port on lighthouse/relay nodes (regular nodes use OS-assigned port 0)	2026-04-01 17:14:12 -05:00
root	71ae25a58c	fix: move unsafe_routes to settings.tun.unsafe_routes (correct NixOS nebula option path)	2026-04-01 17:13:37 -05:00
root	0e61efe5b5	fix: rename tun.dev to tun.device (correct NixOS option name)	2026-04-01 17:07:47 -05:00
root	84e4c68f0e	fix: move unsafeRoutes to module default, genesis overrides to [] ... Per review feedback: - nebula module now defaults unsafeRoutes to [{route=10.42.0.0/16 via=10.157.0.2}] so all regular nodes get home LAN routing automatically - genesis overrides unsafeRoutes=[] since it IS the routing node (avoids loop) - exodus and all k3s nodes (hosea, isaiah, jeremiah, zeke) simplified to nebula.enable = true only, relying on the new default	2026-04-01 16:45:59 -05:00
greg	559155d411	Merge branch 'main' into feat/nebula-mesh	2026-04-01 21:36:08 +00:00
Greg Hellings	2bb0177ffa	chore: add encrypted keys and unencrypted certs	2026-04-01 16:33:59 -05:00
root	792217f640	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