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title: "Idempotent Operation"
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type: concept
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tags: [DevOps, GitOps, 基础概念]
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sources: [ctp-topic-33-an-introduction-to-gitops.md]
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last_updated: 2026-04-19
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---
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## Definition
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Idempotent Operation(幂等操作)是指可以多次执行而不会改变超出初始应用结果的操作。无论执行多少次,最终状态都与执行一次相同。
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## Examples
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- Kubernetes 部署:多次 apply 相同配置不会导致重复创建
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- Terraform apply:重复执行会产生相同的基础设施状态
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- 文件权限设置:重复 chmod 相同权限
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- 数据库 UPSERT:重复插入或更新
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## Non-Idempotent Examples
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- `curl` 请求:每次执行都会创建新资源
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- 计数器递增:每次执行都会改变值
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- 文件追加:重复执行会累积内容
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## Importance in GitOps
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- 确保部署过程可重复执行
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- 支持自动重试和恢复
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- 简化故障处理和调试
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## Related Concepts
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- [[GitOps]]
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- [[Declarative Configuration]]
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- [[Infrastructure as Code (IaC)]]
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## Related Sources
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- [[ctp-topic-33-an-introduction-to-gitops]] — GitOps 入门介绍
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