From 259340df468aed9b538e492339203187533e8387 Mon Sep 17 00:00:00 2001 From: Maksym Buz Date: Tue, 16 Dec 2025 14:10:34 +0100 Subject: [PATCH] CHANGE: Added refactoring notes --- partitioning/REFACTORING_NOTES.md | 39 +++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 partitioning/REFACTORING_NOTES.md diff --git a/partitioning/REFACTORING_NOTES.md b/partitioning/REFACTORING_NOTES.md new file mode 100644 index 0000000..7053883 --- /dev/null +++ b/partitioning/REFACTORING_NOTES.md @@ -0,0 +1,39 @@ +# Refactoring Notes: Zabbix Partitioning Script + +## Overview +The `zabbix_partitioning.py` script has been significantly refactored to improve maintainability, reliability, and compatibility with modern Zabbix versions (7.x). + +## Key Changes + +### 1. Architecture: Class-Based Structure +- **Old**: Procedural script with global variables and scattered logic. +- **New**: Encapsulated in a `ZabbixPartitioner` class. +- **Purpose**: Improves modularity, testability, and state management. Allows the script to be easily imported or extended. + +### 2. Database Connection Management +- **Change**: Implemented `contextlib.contextmanager` for database connections. +- **Purpose**: Ensures database connections are robustly opened and closed, even if errors occur. Handles `wait_timeout` and binary logging settings automatically for every session. + +### 3. Logging +- **Change**: Replaced custom `print` statements with Python's standard `logging` module. +- **Purpose**: + - Allows consistent log formatting. + - Supports configurable output destinations (Console vs Syslog) via the config file. + - Granular log levels (INFO for standard ops, DEBUG for SQL queries). + +### 4. Configuration Handling +- **Change**: Improved validation and parsing of the YAML configuration. +- **Purpose**: + - Removed unused parameters (e.g., `timezone`, as the script relies on system local time). + - Added support for custom database ports (critical for non-standard deployments or containerized tests). + - Explicitly handles the `replicate_sql` flag to control binary logging (it was intergrated into the partitioning logic). + +### 5. Type Safety +- **Change**: Added comprehensive Python type hinting (e.g., `List`, `Dict`, `Optional`). +- **Purpose**: Makes the code self-documenting and allows IDEs/linters to catch potential errors before execution. + +### 6. Zabbix 7.x Compatibility +- **Change**: Added logic to verify Zabbix database version and schema requirements. +- **Purpose**: + - Checks `dbversion` table. + - **Critical**: Validates that target tables have the `clock` column as part of their Primary Key before attempting partitioning, preventing potential data corruption or MySQL errors.