Bekkalokk: Configure Gitea, clean web services

Update bekkalokk secrets format

Update gitea keys and firewall rules

Create gitea-user-import script

Fix SSH host key verification

Gitea-import-users bug squashification

Fix Gitea-import SSH problems

hosts/bekkalokk/services/gitea/default.nix

@@ -0,0 +1,86 @@
+{ config, values, pkgs, ... }:
+let
+  cfg = config.services.gitea;
+  domain = "git2.pvv.ntnu.no";
+  sshPort  = 2222;
+in {
+  sops.secrets = {
+    "gitea/database" = {
+      owner = "gitea";
+      group = "gitea";
+    };
+    "gitea/passwd-ssh-key" = { };
+    "gitea/ssh-known-hosts" = { };
+    "gitea/import-user-env" = { };
+  };
+
+  services.gitea = {
+    enable = true;
+    stateDir = "/data/gitea";
+    appName = "PVV Git";
+
+    database = {
+      type = "postgres";
+      host = "postgres.pvv.ntnu.no";
+      port = config.services.postgresql.port;
+      passwordFile = config.sops.secrets."gitea/database".path;
+      createDatabase = false;
+    };
+
+    settings = {
+      server = {
+        DOMAIN   = domain;
+        ROOT_URL = "https://${domain}/";
+        PROTOCOL = "http+unix";
+        SSH_PORT = sshPort;
+      };
+      service.DISABLE_REGISTRATION = true;
+      session.COOKIE_SECURE = true;
+      database.LOG_SQL = false;
+      picture = {
+        DISABLE_GRAVATAR = true;
+        ENABLE_FEDERATED_AVATAR = false;
+      };
+    };
+  };
+
+  services.nginx.virtualHosts."${domain}" = {
+    forceSSL = true;
+    enableACME = true;
+    locations."/" = {
+      proxyPass = "http://unix:${cfg.settings.server.HTTP_ADDR}";
+      recommendedProxySettings = true;
+      extraConfig = ''
+        client_max_body_size 512M;
+      '';
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ sshPort ];
+
+  # Automatically import users
+  systemd.services.gitea-import-users = {
+    enable = true;
+    preStart=''${pkgs.rsync}/bin/rsync -e "${pkgs.openssh}/bin/ssh -o UserKnownHostsFile=$CREDENTIALS_DIRECTORY/ssh-known-hosts -i $CREDENTIALS_DIRECTORY/sshkey" -a pvv@smtp.pvv.ntnu.no:/etc/passwd /tmp/passwd-import'';
+    serviceConfig = {
+      ExecStart = pkgs.writers.writePython3 "gitea-import-users" { libraries = [ pkgs.python3Packages.requests ]; } (builtins.readFile ./gitea-import-users.py);
+      LoadCredential=[
+        "sshkey:${config.sops.secrets."gitea/passwd-ssh-key".path}"
+        "ssh-known-hosts:${config.sops.secrets."gitea/ssh-known-hosts".path}"
+      ];
+      DynamicUser="yes";
+      EnvironmentFile=config.sops.secrets."gitea/import-user-env".path;
+    };
+  };
+
+  systemd.timers.gitea-import-users = {
+    enable = true;
+    requires = [ "gitea.service" ];
+    after = [ "gitea.service" ];
+    timerConfig = {
+      OnCalendar = "*-*-* 02:00:00";
+      Persistent = true;
+      Unit = "gitea-import-users.service";
+    };
+  };
+}

hosts/bekkalokk/services/gitea/gitea-import-users.py

@@ -0,0 +1,82 @@
+import requests
+import secrets
+import os
+
+EMAIL_DOMAIN = os.getenv('EMAIL_DOMAIN')
+if EMAIL_DOMAIN is None:
+    EMAIL_DOMAIN = 'pvv.ntnu.no'
+
+API_TOKEN = os.getenv('API_TOKEN')
+if API_TOKEN is None:
+    raise Exception('API_TOKEN not set')
+
+GITEA_API_URL = os.getenv('GITEA_API_URL')
+if GITEA_API_URL is None:
+    GITEA_API_URL = 'https://git2.pvv.ntnu.no/api/v1'
+
+BANNED_SHELLS = [
+    "/usr/bin/nologin",
+    "/usr/sbin/nologin",
+    "/sbin/nologin",
+    "/bin/false",
+    "/bin/msgsh",
+]
+
+existing_users = []
+
+
+def add_user(username, name):
+    if username in existing_users:
+        return
+
+    user = {
+            "email": username + '@' + EMAIL_DOMAIN,
+            "full_name": name,
+            "login_name": username,
+            "password": secrets.token_urlsafe(32),
+            "source_id": 1,  # 1 = SMTP
+            "username": username,
+            "must_change_password": False,
+            "visibility": "private",
+    }
+
+    r = requests.post(GITEA_API_URL + '/admin/users', json=user,
+                      headers={'Authorization': 'token ' + API_TOKEN})
+    if r.status_code != 201:
+        print('ERR: Failed to create user ' + username + ': ' + r.text)
+        return
+
+    print('Created user ' + username)
+    existing_users.append(username)
+
+
+def main():
+
+    # Fetch existing users
+    r = requests.get(GITEA_API_URL + '/admin/users',
+                     headers={'Authorization': 'token ' + API_TOKEN})
+    if r.status_code != 200:
+        raise Exception('Failed to get users: ' + r.text)
+
+    for user in r.json():
+        existing_users.append(user['login'])
+
+    # Read the file, add each user
+    with open("/tmp/passwd-import", 'r') as f:
+        for line in f.readlines():
+            uid = int(line.split(':')[2])
+            if uid < 1000:
+                continue
+
+            shell = line.split(':')[-1]
+            if shell in BANNED_SHELLS:
+                continue
+
+            username = line.split(':')[0]
+            name = line.split(':')[4]
+
+            add_user(username, name)
+
+
+if __name__ == '__main__':
+    main()