bekkalokk/gitea: set up gitea-web sync units
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GPG Key ID:
9F2F7D8250F35146
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@ -6,7 +6,8 @@ let
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in {
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imports = [
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./ci.nix
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./import-users.nix
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./import-users
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./web-secret-provider
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];
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sops.secrets = {
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@ -0,0 +1,146 @@
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{ config, pkgs, lib, ... }:
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let
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organizations = [
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"Drift"
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"Projects"
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"Kurs"
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];
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cfg = config.services.gitea;
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program = pkgs.writers.writePython3 "gitea-web-secret-provider" {
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libraries = with pkgs.python3Packages; [ requests ];
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flakeIgnore = [
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"E501" # Line over 80 chars lol
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"E201" # "whitespace after {"
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"E202" # "whitespace after }"
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"E251" # unexpected spaces around keyword / parameter equals
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"W391" # Newline at end of file
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];
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makeWrapperArgs = [
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"--prefix PATH : ${(lib.makeBinPath [ pkgs.openssh ])}"
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];
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} (lib.pipe ./gitea-web-secret-provider.py [
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builtins.readFile
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(lib.splitString "\n")
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(lib.drop 2)
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lib.concatLines
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]);
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commonHardening = {
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NoNewPrivileges = true;
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PrivateTmp = true;
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PrivateDevices = true;
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ProtectSystem = true;
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ProtectHome = true;
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ProtectControlGroups = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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MemoryDenyWriteExecute = true;
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LockPersonality = true;
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};
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in
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{
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sops.secrets."gitea/web-secret-provider/token" = {
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owner = "gitea";
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group = "gitea";
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restartUnits = [
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"gitea-web-secret-provider@"
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] ++ (map (org: "gitea-web-secret-provider@${org}") organizations);
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};
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systemd.tmpfiles.settings."10-gitea-web-secret-provider"."/var/lib/gitea-web/authorized_keys.d".d = {
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user = "gitea";
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group = "gitea";
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mode = "700";
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};
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systemd.slices.system-giteaweb = {
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description = "Gitea web directories";
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wantedBy = [ "multi-user.target" ];
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};
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# https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html#Specifiers
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# %i - instance name (after the @)
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# %d - secrets directory
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# %S - /var/lib
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systemd.services = {
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"gitea-web-secret-provider@" = {
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description = "Ensure all repos in %i has an SSH key to push web content";
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requires = [ "gitea.service" "network.target" ];
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serviceConfig = {
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Slice = "system-giteaweb.slice";
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Type = "oneshot";
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ExecStart = let
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args = lib.cli.toGNUCommandLineShell { } {
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org = "%i";
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token-path = "%d/token";
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api-url = "${cfg.settings.server.ROOT_URL}api/v1";
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key-dir = "%S/%i/keys";
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authorized-keys-path = "%S/gitea-web/authorized_keys.d/%i";
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rrsync-path = "${pkgs.rrsync}/bin/rrsync";
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web-dir = "%S/gitea-web/web";
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};
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in "${program} ${args}";
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User = "gitea";
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Group = "gitea";
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StateDirectory = "%i";
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LoadCredential = [
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"token:${config.sops.secrets."gitea/web-secret-provider/token".path}"
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];
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} // commonHardening;
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};
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"gitea-web-chown@" = {
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description = "Ensure all gitea-web content is owned by the gitea user";
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serviceConfig = {
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Slice = "system-giteaweb.slice";
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Type = "oneshot";
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ExecStart = "${pkgs.coreutils}/bin/chown -R gitea:gitea '%S/gitea-web'";
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StateDirectory = "%i";
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LoadCredential = [
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"token:${config.sops.secrets."gitea/web-secret-provider/token".path}"
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];
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PrivateNetwork = true;
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} // commonHardening;
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};
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};
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systemd.timers = {
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"gitea-web-secret-provider@" = {
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description = "Ensure all repos in %i has an SSH key to push web content";
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timerConfig = {
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RandomizedDelaySec = "1h";
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Persistent = true;
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Unit = "gitea-web-secret-provider@%i.service";
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OnCalendar = "daily";
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};
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};
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"gitea-web-chown@" = {
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description = "Ensure all gitea-web content is owned by the gitea user";
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timerConfig = {
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RandomizedDelaySec = "10m";
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Persistent = true;
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Unit = "gitea-web-chown@%i.service";
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OnCalendar = "hourly";
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};
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};
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};
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systemd.targets.timers.wants = lib.mapCartesianProduct ({ timer, org }: "${timer}@${org}.timer") {
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timer = [
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"gitea-web-secret-provider"
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"gitea-web-chown"
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];
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org = organizations;
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};
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services.openssh.authorizedKeysFiles = map (org: "/var/lib/gitea-web/authorized_keys.d/${org}") organizations;
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}
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@ -0,0 +1,107 @@
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#!/usr/bin/env nix-shell
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#!nix-shell -i python3 -p "python3.withPackages(ps: with ps; [ requests ])" openssh
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import argparse
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import hashlib
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import os
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import requests
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import subprocess
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from pathlib import Path
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def parse_args():
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parser = argparse.ArgumentParser(description="Generate SSH keys for Gitea repositories and add them as secrets")
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parser.add_argument("--org", required=True, help="The organization to generate keys for")
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parser.add_argument("--token-path", metavar='PATH', required=True, help="Path to a file containing the Gitea API token")
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parser.add_argument("--api-url", metavar='URL', help="The URL of the Gitea API", default="https://git.pvv.ntnu.no/api/v1")
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parser.add_argument("--key-dir", metavar='PATH', help="The directory to store the generated keys in", default="/run/gitea-web-secret-provider")
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parser.add_argument("--authorized-keys-path", metavar='PATH', help="The path to the resulting authorized_keys file", default="/etc/ssh/authorized_keys.d/gitea-web-secret-provider")
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parser.add_argument("--rrsync-path", metavar='PATH', help="The path to the rrsync binary", default="/run/current-system/sw/bin/rrsync")
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parser.add_argument("--web-dir", metavar='PATH', help="The directory to sync the repositories to", default="/var/www")
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parser.add_argument("--force", action="store_true", help="Overwrite existing keys")
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return parser.parse_args()
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def add_secret(args, token, repo, name, secret):
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result = requests.put(
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f"{args.api_url}/repos/{args.org}/{repo}/actions/secrets/{name}",
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json = { 'data': secret },
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headers = { 'Authorization': 'token ' + token },
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)
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if result.status_code not in (201, 204):
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raise Exception(f"Failed to add secret: {result.json()}")
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def get_org_repo_list(args, token):
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result = requests.get(
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f"{args.api_url}/orgs/{args.org}/repos",
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headers = { 'Authorization': 'token ' + token },
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)
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return [repo["name"] for repo in result.json()]
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def generate_ssh_key(args, repository: str):
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keyname = hashlib.sha256(args.org.encode() + repository.encode()).hexdigest()
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if not os.path.exists(os.path.join(args.key_dir, keyname)) or args.force:
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subprocess.run(
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[
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"ssh-keygen",
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*("-t", "ed25519"),
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*("-b", "4096"),
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*("-f", os.path.join(args.key_dir, keyname)),
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*("-N", ""),
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*("-C", f"{args.org}/{repository}"),
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],
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check=True,
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stdin=subprocess.DEVNULL,
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stdout=subprocess.DEVNULL,
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stderr=subprocess.DEVNULL
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)
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print(f"Generated SSH key for `{args.org}/{repository}`")
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with open(os.path.join(args.key_dir, keyname), "r") as f:
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private_key = f.read()
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with open(os.path.join(args.key_dir, keyname + ".pub"), "r") as f:
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public_key = f.read()
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return private_key, public_key
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def generate_authorized_keys(args, repo_public_keys: list[tuple[str, str]]):
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result = ""
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for repo, public_key in repo_public_keys:
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result += f"""
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command="{args.rrsync_path} -wo {args.web_dir}/{args.org}/{repo}",restrict,no-agent-forwarding,no-port-forwarding,no-pty,no-X11-forwarding {public_key}
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""".strip() + "\n"
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with open(args.authorized_keys_path, "w") as f:
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f.write(result)
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def main():
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args = parse_args()
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with open(args.token_path, "r") as f:
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token = f.read().strip()
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os.makedirs(args.key_dir, 0o700, exist_ok=True)
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os.makedirs(Path(args.authorized_keys_path).parent, 0o700, exist_ok=True)
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repos = get_org_repo_list(args, token)
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print(f'Found {len(repos)} repositories in `{args.org}`')
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repo_public_keys = []
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for repo in repos:
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print(f"Locating key for `{args.org}/{repo}`")
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private_key, public_key = generate_ssh_key(args, repo)
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add_secret(args, token, repo, "WEB_SYNC_SSH_KEY", private_key)
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repo_public_keys.append((repo, public_key))
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generate_authorized_keys(args, repo_public_keys)
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print(f"Wrote authorized_keys file to `{args.authorized_keys_path}`")
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if __name__ == "__main__":
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main()
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@ -1,4 +1,6 @@
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gitea:
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web-secret-provider:
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token: ENC[AES256_GCM,data:pHmBKxrNcLifl4sjR44AGEElfdachja35Tl/InsqvBWturaeTv4R0w==,iv:emBWfXQs2VNqtpDp5iA5swNC+24AWDYYXo6nvN+Fwx4=,tag:lkhSVSs6IqhHpfDPOX0wQA==,type:str]
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password: ENC[AES256_GCM,data:hlNzdU1ope0t50/3aztyLeXjMHd2vFPpwURX+Iu8f49DOqgSnEMtV+KtLA==,iv:qljRnSnchL5cFmaUAfCH9GQYQxcy5cyWejgk1x6bFgI=,tag:tIhboFU5kZsj5oAQR3hLbw==,type:str]
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database: ENC[AES256_GCM,data:UlS33IdCEyeSvT6ngpmnkBWHuSEqsB//DT+3b7C+UwbD8UXWJlsLf1X8/w==,iv:mPRW5ldyZaHP+y/0vC2JGSLZmlkhgmkvXPk4LazkSDs=,tag:gGk6Z/nbPvzE1zG+tJC8Sw==,type:str]
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email-password: ENC[AES256_GCM,data:KRwC+aL1aPvJuXt91Oq1ttATMnFTnuUy,iv:ats8TygB/2pORkaTZzPOLufZ9UmvVAKoRcWNvYF1z6w=,tag:Do0fA+4cZ3+l7JJyu8hjBg==,type:str]
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@ -90,8 +92,8 @@ sops:
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UHpLRkdQTnhkeGlWVG9VS1hkWktyckEKAdwnA9URLYZ50lMtXrU9Q09d0L3Zfsyr
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4UsvjjdnFtsXwEZ9ZzOQrpiN0Oz24s3csw5KckDni6kslaloJZsLGg==
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-----END AGE ENCRYPTED FILE-----
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lastmodified: "2024-05-26T02:07:41Z"
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mac: ENC[AES256_GCM,data:CRaJefV1zcJc6eyzyjTLgd0+Wv46VT8o4iz2YAGU+c2b/Cr97Tj290LoEO6UXTI3uFwVfzii2yZ2l+4FK3nVVriD4Cx1O/9qWcnLa5gfK30U0zof6AsJx8qtGu1t6oiPlGUCF7sT0BW9Wp8cPumrY6cZp9QbhmIDV0o0aJNUNN4=,iv:8OSYV1eG6kYlJD4ovZZhcD1GaYnmy7vHPa/+7egM1nE=,tag:OPI13rpDh2l1ViFj8TBFWg==,type:str]
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lastmodified: "2024-08-13T19:49:24Z"
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mac: ENC[AES256_GCM,data:AeJ53D+8A8mHYRmVHdqhcS1ZTbqVe5gQqJsJjMk4T/ZlNX8/V4M9mqAW2FB9m/JSdj234gDu+PBHcW70ZrCqeVsoUW/ETVgUX3W2gBmBgYJiRETp8I7/eks/5YEV6vIIxQsZNP/9dZTNX4T2wD74ELl23NSTXA/6k2tyzBlTMYo=,iv:DABafHvw+5w0PHCKqLgpwmQnv0uHOTyj+s8gdnHFTZ4=,tag:SNZ7W+6zdyuuv2AB9ir8eg==,type:str]
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pgp:
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- created_at: "2024-08-04T00:03:28Z"
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enc: |-
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@ -114,4 +116,4 @@ sops:
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-----END PGP MESSAGE-----
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fp: F7D37890228A907440E1FD4846B9228E814A2AAC
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unencrypted_suffix: _unencrypted
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version: 3.8.1
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version: 3.9.0
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