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title: "Docker Image"
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type: concept
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tags: [docker, container, image]
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sources: [docker-images-transfer-guide]
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last_updated: 2026-04-17
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---
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## Summary
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Docker Image(Docker 镜像)是容器化平台的核心概念,是一个只读模板,包含应用程序及其运行时所需的全部依赖(代码、运行时、库、环境变量、配置文件等)。
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## Definition
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用于创建 Docker 容器的只读模板,通过分层存储实现高效复用和传输。
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## Key Attributes
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- **格式**:分层文件系统
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- **存储方式**:可导出为 tar 归档文件
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- **复用机制**:分层存储,多个镜像可共享基础层
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## Use Cases
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- 应用程序打包和分发
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- 跨环境部署(开发、测试、生产)
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- 离线环境镜像迁移
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## Related Concepts
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- [[Docker]]:容器化平台
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- [[Docker-Save]]:镜像导出命令
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- [[Docker-Load]]:镜像导入命令
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## Connections
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- [[Docker]] ← 包含 ← [[Docker-Image]]
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- [[Docker-Image]] ← 可导出为 ← [[Docker-Save]]
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- [[Docker-Image]] ← 可导入为 ← [[Docker-Load]]
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