Automation Assumes a Consistency We Did Not Have

说明与用途

自动化假设一致性，而实际环境往往缺乏。作者展示了通过定义单一期望状态并记录例外，如何在异构服务器群中实现可靠自动化。

问题

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

结果

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

工作流

• 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.

证据

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

来源