tvl-depot/ops/machines/sanduny/default.nix
Vincent Ambo 8cdad7d45c feat(ops): introduce (head|tail)scale server at net.tvl.fyi
This runs a headscale server on sanduny which lets users join their
machines to the TVL tailscale network.

This would theoretically let people communicate with each other on the
internal network, but also more notably joined servers can advertise
exit node capability so that we can have our own "VPN network", for
starters with endpoints in Germany, UK and Russia (whitby, sanduny and
koptevo respectively).

This setup isn't fully stable yet, notably:

* The IP range used by tailscale is just the default one right now,
  I'm not sure if that should be changed or what.

* The system is stateful (on sanduny), but the state is not (yet)
  backed up anywhere. Use with caution.

* Machine joining is a manual process requiring SSH & root access to
  sanduny.

  The process is to log in to sanduny, then get a headscale shell with
  `sudo -u headscale bash`, and to use the `headscale` CLI within
  there to administrate access.

  I've opted to create a user account `tvl` for TVL-owned machines,
  and a personal account for myself and my machines.

Change-Id: I4f1be1fe8062a6c2e77203ff72fe8709f4e4dec8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8837
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2023-06-22 13:23:14 +00:00

137 lines
3.2 KiB
Nix

# sanduny.tvl.su
#
# This is a VPS hosted with Bitfolk, intended to additionally serve
# some of our public services like cgit, josh and the websites.
#
# In case of whitby going down, sanduny will keep depot available.
_: # ignore readTree options
{ config, depot, lib, pkgs, ... }:
let
mod = name: depot.path.origSrc + ("/ops/modules/" + name);
in
{
imports = [
(mod "cgit.nix")
(mod "depot-inbox.nix")
(mod "depot-replica.nix")
(mod "journaldriver.nix")
(mod "known-hosts.nix")
(mod "tvl-cache.nix")
(mod "tvl-headscale.nix")
(mod "tvl-users.nix")
(mod "www/inbox.tvl.su.nix")
(mod "www/self-redirect.nix")
];
networking = {
hostName = "sanduny";
domain = "tvl.su";
useDHCP = false;
interfaces.eth0 = {
ipv4.addresses = lib.singleton {
address = "85.119.82.231";
prefixLength = 21;
};
ipv6.addresses = lib.singleton {
address = "2001:ba8:1f1:f109::feed:edef:beef";
prefixLength = 64;
};
};
defaultGateway = "85.119.80.1";
defaultGateway6.address = "2001:ba8:1f1:f109::1";
firewall.allowedTCPPorts = [ 22 80 443 ];
# https://bitfolk.com/customer_information.html#toc_2_DNS
nameservers = [
"85.119.80.232"
"85.119.80.233"
"2001:ba8:1f1:f205::53"
"2001:ba8:1f1:f206::53"
];
};
security.sudo.wheelNeedsPassword = false;
environment.systemPackages = with pkgs; [
emacs-nox
vim
curl
unzip
htop
];
programs.mtr.enable = true;
services.openssh.enable = true;
services.fail2ban.enable = true;
# Run tailscale for the TVL net.tvl.fyi network.
# tailscale up --login-server https://net.tvl.fyi --accept-dns=false --advertise-exit-node
services.tailscale = {
enable = true;
useRoutingFeatures = "server"; # for exit-node usage
};
# Automatically collect garbage from the Nix store.
services.depot.automatic-gc = {
enable = true;
interval = "1 hour";
diskThreshold = 2; # GiB
maxFreed = 5; # GiB
preserveGenerations = "90d";
};
# Allow Gerrit to replicate depot to /var/lib/depot
services.depot.replica.enable = true;
# Run git serving tools locally ...
services.depot.cgit = {
enable = true;
repo = "/var/lib/depot";
};
# Serve public-inbox ...
services.depot.inbox.enable = true;
time.timeZone = "UTC";
# GRUB does not actually need to be installed on disk; Bitfolk have
# their own way of booting systems as long as config is in place.
boot.loader.grub.device = "nodev";
boot.loader.grub.enable = true;
boot.initrd.availableKernelModules = [ "xen_blkfront" ];
hardware.cpu.intel.updateMicrocode = true;
fileSystems = {
"/" = {
device = "/dev/disk/by-uuid/aabc3638-43ca-45f3-af89-c451e8448e92";
fsType = "ext4";
};
"/boot" = {
device = "/dev/disk/by-uuid/75aa99d5-fed7-4c5c-8570-7745f6cff9f5";
fsType = "ext3";
};
"/nix" = {
device = "/dev/disk/by-uuid/d1721678-c294-482b-b72e-3b15f2c56c63";
fsType = "ext4";
};
};
tvl.cache.enable = true;
swapDevices = lib.singleton {
device = "/dev/disk/by-uuid/df4ad9da-0a06-4c27-93e5-5d44e4750e55";
};
system.stateVersion = "22.05"; # Did you read the comment?
}