Self-host your own digital island
ryan.freumh.org
1{ pkgs, config, lib, ... }:
2
3let
4 cfg = config.eilean;
5 domain = config.networking.domain;
6in {
7 options.eilean.gitea = {
8 enable = lib.mkEnableOption "gitea";
9 sshPort = lib.mkOption {
10 type = lib.types.int;
11 default = 3001;
12 };
13 };
14
15 config = lib.mkIf cfg.gitea.enable {
16 services.nginx = {
17 recommendedProxySettings = true;
18 virtualHosts."git.${domain}" = {
19 enableACME = true;
20 forceSSL = true;
21 locations."/" = {
22 proxyPass = "http://localhost:${builtins.toString config.services.gitea.settings.server.HTTP_PORT}/";
23 };
24 };
25 };
26
27 users.users.git = {
28 description = "Git Service";
29 home = config.services.gitea.stateDir;
30 useDefaultShell = true;
31 group = "gitea";
32 isSystemUser = true;
33 };
34
35 services.gitea = {
36 enable = true;
37 user = "git";
38 appName = "git | ${domain}";
39 mailerPasswordFile = "${config.eilean.secretsDir}/email-pswd-unhashed";
40 domain = "git.${domain}";
41 rootUrl = "https://git.${domain}/";
42 settings = {
43 mailer = {
44 ENABLED = true;
45 FROM = "git@${domain}";
46 MAILER_TYPE = "smtp";
47 HOST = "mail.${domain}:465";
48 USER = "misc@${domain}";
49 IS_TLS_ENABLED = true;
50 };
51 repository.DEFAULT_BRANCH = "main";
52 service.DISABLE_REGISTRATION = true;
53 #server.HTTP_PORT = 3000;
54 };
55 database = {
56 type = "postgres";
57 passwordFile = "${config.eilean.secretsDir}/gitea-db";
58 user = "git";
59 name = "git";
60 #createDatabase = true;
61 #socket = "/run/postgresql";
62 };
63 #stateDir = "/var/lib/gitea";
64 };
65
66 # https://github.com/NixOS/nixpkgs/issues/103446
67 systemd.services.gitea.serviceConfig = {
68 ReadWritePaths = [ "/var/lib/postfix/queue/maildrop" ];
69 NoNewPrivileges = lib.mkForce false;
70 PrivateDevices = lib.mkForce false;
71 PrivateUsers = lib.mkForce false;
72 ProtectHostname = lib.mkForce false;
73 ProtectClock = lib.mkForce false;
74 ProtectKernelTunables = lib.mkForce false;
75 ProtectKernelModules = lib.mkForce false;
76 ProtectKernelLogs = lib.mkForce false;
77 RestrictAddressFamilies = lib.mkForce [ ];
78 LockPersonality = lib.mkForce false;
79 MemoryDenyWriteExecute = lib.mkForce false;
80 RestrictRealtime = lib.mkForce false;
81 RestrictSUIDSGID = lib.mkForce false;
82 SystemCallArchitectures = lib.mkForce "";
83 SystemCallFilter = lib.mkForce [];
84 };
85
86 eilean.services.dns.zones.${config.networking.domain}.records = [
87 {
88 name = "git";
89 type = "CNAME";
90 data = "vps";
91 }
92 ];
93
94 # proxy port 22 on ethernet interface to internal gitea ssh server
95 # openssh server remains accessible on port 22 via vpn(s)
96
97 # allow forwarding
98 boot.kernel.sysctl = {
99 "net.ipv4.ip_forward" = 1;
100 "net.ipv6.conf.all.forwarding" = 1;
101 };
102
103 networking.firewall = {
104 allowedTCPPorts = [
105 22
106 cfg.gitea.sshPort
107 ];
108 extraCommands = ''
109 # proxy all traffic on public interface to the gitea SSH server
110 iptables -A PREROUTING -t nat -i ${config.eilean.publicInterface} -p tcp --dport 22 -j REDIRECT --to-port ${builtins.toString cfg.gitea.sshPort}
111 ip6tables -A PREROUTING -t nat -i ${config.eilean.publicInterface} -p tcp --dport 22 -j REDIRECT --to-port ${builtins.toString cfg.gitea.sshPort}
112
113 # proxy locally originating outgoing packets
114 iptables -A OUTPUT -d ${config.eilean.serverIpv4} -t nat -p tcp --dport 22 -j REDIRECT --to-port ${builtins.toString cfg.gitea.sshPort}
115 ip6tables -A OUTPUT -d ${config.eilean.serverIpv6} -t nat -p tcp --dport 22 -j REDIRECT --to-port ${builtins.toString cfg.gitea.sshPort}
116 '';
117 };
118
119 services.gitea.settings.server = {
120 START_SSH_SERVER = true;
121 SSH_LISTEN_PORT = cfg.gitea.sshPort;
122 };
123 };
124}