Backup: parse config to dataclasses

With support of multiple config values

AGENTS.md

@@ -59,6 +59,7 @@ Ansible-based server automation for personal services. Playbooks provision Docke
 - Ansible lint: `ansible-lint .` (CI default).
 - Authelia config validation: `task authelia-validate-config` (renders with secrets then validates via docker).
 - Black formatting for Python helpers: `task format-py-files`.
+- Python types validation with mypy: `mypy <file.py>`.
 
 ## Operational Notes
 - Deployments rely on `production.yml` inventory and per-app playbooks; run with `--diff` for visibility.

files/backups/backup-all.py

@@ -4,7 +4,7 @@ Backup script for all applications
 Automatically discovers and runs backup scripts for all users,
 then creates restic backups and sends notifications.
 """
-
+import itertools
 import os
 import sys
 import subprocess
@@ -12,9 +12,10 @@ import logging
 import pwd
 from dataclasses import dataclass
 from pathlib import Path
-from typing import List, Optional
+from typing import Dict, List, Optional
 import requests
-import configparser
+import tomllib
+from collections.abc import Iterable
 
 
 # Configure logging
@@ -28,17 +29,107 @@ logging.basicConfig(
 )
 logger = logging.getLogger(__name__)
 
-config = configparser.ConfigParser()
-config.read("/etc/backup/config.ini")
 
-RESTIC_REPOSITORY = config.get("restic", "RESTIC_REPOSITORY")
+@dataclass
-RESTIC_PASSWORD = config.get("restic", "RESTIC_PASSWORD")
+class StorageConfig:
-AWS_ACCESS_KEY_ID = config.get("restic", "AWS_ACCESS_KEY_ID")
+    type: str
-AWS_SECRET_ACCESS_KEY = config.get("restic", "AWS_SECRET_ACCESS_KEY")
+    restic_repository: str
-AWS_DEFAULT_REGION = config.get("restic", "AWS_DEFAULT_REGION")
+    restic_password: str
-TELEGRAM_BOT_TOKEN = config.get("telegram", "TELEGRAM_BOT_TOKEN")
+    aws_access_key_id: str
-TELEGRAM_CHAT_ID = config.get("telegram", "TELEGRAM_CHAT_ID")
+    aws_secret_access_key: str
-NOTIFICATIONS_NAME = config.get("telegram", "NOTIFICATIONS_NAME")
+    aws_default_region: str
+
+
+@dataclass
+class TelegramConfig:
+    type: str
+    telegram_bot_token: str
+    telegram_chat_id: str
+    notifications_name: str
+
+
+@dataclass
+class Config:
+    roots: List[Path]
+    storage: Dict[str, StorageConfig]
+    notifications: Dict[str, TelegramConfig]
+
+
+def read_config(config_path: Path) -> Config:
+    try:
+        with config_path.open("rb") as config_file:
+            raw_config = tomllib.load(config_file)
+    except OSError as e:
+        logger.error(f"Failed to read config file {config_path}: {e}")
+        raise
+
+    roots_raw = raw_config.get("roots") or []
+    if not isinstance(roots_raw, list) or not roots_raw:
+        raise ValueError("roots must be a non-empty list of paths in config.toml")
+    roots = [Path(root) for root in roots_raw]
+
+    storage_raw = raw_config.get("storage") or {}
+    storage: Dict[str, StorageConfig] = {}
+    for name, cfg in storage_raw.items():
+        if not isinstance(cfg, dict):
+            raise ValueError(f"Storage config for {name} must be a table")
+        storage[name] = StorageConfig(
+            type=cfg.get("type", ""),
+            restic_repository=cfg.get("restic_repository", ""),
+            restic_password=cfg.get("restic_password", ""),
+            aws_access_key_id=cfg.get("aws_access_key_id", ""),
+            aws_secret_access_key=cfg.get("aws_secret_access_key", ""),
+            aws_default_region=cfg.get("aws_default_region", ""),
+        )
+
+    if not storage:
+        raise ValueError("At least one storage backend must be configured")
+
+    notifications_raw = raw_config.get("notifications") or {}
+    notifications: Dict[str, TelegramConfig] = {}
+    for name, cfg in notifications_raw.items():
+        if not isinstance(cfg, dict):
+            raise ValueError(f"Notification config for {name} must be a table")
+        notifications[name] = TelegramConfig(
+            type=cfg.get("type", ""),
+            telegram_bot_token=cfg.get("telegram_bot_token", ""),
+            telegram_chat_id=cfg.get("telegram_chat_id", ""),
+            notifications_name=cfg.get("notifications_name", ""),
+        )
+
+    if not notifications:
+        raise ValueError("At least one notification backend must be configured")
+
+    for name, cfg in storage.items():
+        if not all(
+            [
+                cfg.type,
+                cfg.restic_repository,
+                cfg.restic_password,
+                cfg.aws_access_key_id,
+                cfg.aws_secret_access_key,
+                cfg.aws_default_region,
+            ]
+        ):
+            raise ValueError(f"Missing storage configuration values for backend {name}")
+
+    for name, cfg in notifications.items():
+        if not all(
+            [
+                cfg.type,
+                cfg.telegram_bot_token,
+                cfg.telegram_chat_id,
+                cfg.notifications_name,
+            ]
+        ):
+            raise ValueError(
+                f"Missing notification configuration values for backend {name}"
+            )
+
+    return Config(roots=roots, storage=storage, notifications=notifications)
+
+
+CONFIG_PATH = Path("/etc/backup/config.toml")
 
 # File name to store directories and files to back up
 BACKUP_TARGETS_FILE = "backup-targets"
@@ -59,12 +150,22 @@ class BackupManager:
         self.errors: List[str] = []
         self.warnings: List[str] = []
         self.successful_backups: List[str] = []
+        self.config = read_config(CONFIG_PATH)
+
+    def _select_storage(self) -> StorageConfig:
+        if "yandex" in self.config.storage:
+            return self.config.storage["yandex"]
+        return next(iter(self.config.storage.values()))
+
+    def _select_telegram(self) -> Optional[TelegramConfig]:
+        if "telegram" in self.config.notifications:
+            return self.config.notifications["telegram"]
+        return next(iter(self.config.notifications.values()), None)
 
     def find_applications(self) -> List[Application]:
         """Get all application directories and their owners."""
         applications: List[Application] = []
-        applications_path = Path("/mnt/applications")
+        source_dirs = itertools.chain(*(root.iterdir() for root in self.config.roots))
-        source_dirs = applications_path.iterdir()
 
         for app_dir in source_dirs:
             if "lost+found" in str(app_dir):
@@ -201,19 +302,21 @@ class BackupManager:
             logger.warning("No backup directories found")
             return True
 
+        storage_cfg = self._select_storage()
+
         try:
             logger.info("Starting restic backup")
-            logger.info("Destination: %s", RESTIC_REPOSITORY)
+            logger.info("Destination: %s", storage_cfg.restic_repository)
 
             # Set environment variables for restic
             env = os.environ.copy()
             env.update(
                 {
-                    "RESTIC_REPOSITORY": RESTIC_REPOSITORY,
+                    "RESTIC_REPOSITORY": storage_cfg.restic_repository,
-                    "RESTIC_PASSWORD": RESTIC_PASSWORD,
+                    "RESTIC_PASSWORD": storage_cfg.restic_password,
-                    "AWS_ACCESS_KEY_ID": AWS_ACCESS_KEY_ID,
+                    "AWS_ACCESS_KEY_ID": storage_cfg.aws_access_key_id,
-                    "AWS_SECRET_ACCESS_KEY": AWS_SECRET_ACCESS_KEY,
+                    "AWS_SECRET_ACCESS_KEY": storage_cfg.aws_secret_access_key,
-                    "AWS_DEFAULT_REGION": AWS_DEFAULT_REGION,
+                    "AWS_DEFAULT_REGION": storage_cfg.aws_default_region,
                 }
             )
 
@@ -282,15 +385,22 @@ class BackupManager:
 
     def send_telegram_notification(self, success: bool) -> None:
         """Send notification to Telegram"""
+        telegram_cfg = self._select_telegram()
+        if telegram_cfg is None:
+            logger.warning("No telegram notification backend configured")
+            return
+
         try:
             if success and not self.errors:
-                message = f"<b>{NOTIFICATIONS_NAME}</b>: бекап успешно завершен!"
+                message = (
+                    f"<b>{telegram_cfg.notifications_name}</b>: бекап успешно завершен!"
+                )
                 if self.successful_backups:
                     message += (
                         f"\n\nУспешные бекапы: {', '.join(self.successful_backups)}"
                     )
             else:
-                message = f"<b>{NOTIFICATIONS_NAME}</b>: бекап завершен с ошибками!"
+                message = f"<b>{telegram_cfg.notifications_name}</b>: бекап завершен с ошибками!"
 
                 if self.successful_backups:
                     message += (
@@ -303,8 +413,12 @@ class BackupManager:
                 if self.errors:
                     message += f"\n\n❌ Ошибки:\n" + "\n".join(self.errors)
 
-            url = f"https://api.telegram.org/bot{TELEGRAM_BOT_TOKEN}/sendMessage"
+            url = f"https://api.telegram.org/bot{telegram_cfg.telegram_bot_token}/sendMessage"
-            data = {"chat_id": TELEGRAM_CHAT_ID, "parse_mode": "HTML", "text": message}
+            data = {
+                "chat_id": telegram_cfg.telegram_chat_id,
+                "parse_mode": "HTML",
+                "text": message,
+            }
 
             response = requests.post(url, data=data, timeout=30)
 

files/backups/config.template.toml

@@ -0,0 +1,17 @@
+roots = [
+    "{{ application_dir }}"
+]
+
+[storage.yandex]
+type = "restic"
+restic_repository = "{{ restic_repository }}"
+restic_password = "{{ restic_password }}"
+aws_access_key_id = "{{ restic_s3_access_key }}"
+aws_secret_access_key = "{{ restic_s3_access_secret }}"
+aws_default_region = "{{ restic_s3_region }}"
+
+[notifications.telegram]
+type = "telegram"
+telegram_bot_token = "{{ notifications_tg_bot_token }}"
+telegram_chat_id = "{{ notifications_tg_chat_id }}"
+notifications_name = "{{ notifications_name }}"

lefthook.yml

@@ -1,6 +1,8 @@
 #   Refer for explanation to following link:
 #   https://lefthook.dev/configuration/
 
+glob_matcher: doublestar
+
 templates:
   av-hooks-dir: "/home/av/projects/private/git-hooks"
 
@@ -12,3 +14,12 @@ pre-commit:
 
     - name: "check secret files"
       run: "python3 {av-hooks-dir}/pre-commit/check-secrets-encrypted-with-ansible-vault.py"
+
+    - name: "format python"
+      glob: "**/*.py"
+      run: "black --quiet {staged_files}"
+      stage_fixed: true
+
+    - name: "mypy"
+      glob: "**/*.py"
+      run: "mypy {staged_files}"

playbook-backups.yml

@@ -7,7 +7,7 @@
 
   vars:
     backup_config_dir: "/etc/backup"
-    backup_config_file: "{{ (backup_config_dir, 'config.ini') | path_join }}"
+    backup_config_file: "{{ (backup_config_dir, 'config.toml') | path_join }}"
 
     restic_shell_script: "{{ (bin_prefix, 'restic-shell.sh') | path_join }}"
     backup_all_script: "{{ (bin_prefix, 'backup-all.py') | path_join }}"
@@ -23,7 +23,7 @@
 
     - name: "Create backup config file"
       ansible.builtin.template:
-        src: "files/backups/config.template.ini"
+        src: "files/backups/config.template.toml"
         dest: "{{ backup_config_file }}"
         owner: root
         group: root