Automation Assumes a Consistency We Did Not Have

Описание и применение

Автоматизация требует согласованности, которой в реальном окружении часто нет. Автор описал, как стандартизация состояния серверов и фиксация исключений позволили добиться надёжной автоматизации.

Задача

Twelve servers behind a single application had undocumented, divergent configurations, making automation impossible.

Результат

Standardizing the desired state reduced manual drift to three documented exceptions, enabling reliable automation and daily drift reporting.

Рабочий процесс

• 1. Inventory all servers and document current state.
• 2. Identify undocumented differences and classify them as exceptions.
• 3. Create a single desired state configuration file for the application servers.
• 4. Rebuild each server to match the desired state, applying exceptions where necessary.
• 5. Set up daily drift detection and reporting.
• 6. Enforce that any future changes must be made through the desired state file.

Доказательства

The automation worked immediately on seven of them. The other five each failed differently.

Источник