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- Docker 镜像优化 · Docker Image Optimizer
Docker 镜像优化 · Docker Image Optimizer
诊断 Docker 镜像体积与构建问题,输出分层优化、多阶段构建与安全加固方案。
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Docker 镜像优化 · Docker Image Optimizer
Example session with this skill installed
请审查这个 Node 服务的 Dockerfile,镜像 1.8GB、构建 12 分钟,帮我减体积并加固。
- Read your context and instructions
- Compiled the docker docker image
Docker 镜像优化方案已生成。
关键发现
- 基础镜像 node:20 可换 node:20-alpine。
- 缺少 .dockerignore,node_modules 被打进构建上下文。
- 无多阶段构建,构建依赖留在了运行时镜像。
优化动作
| 问题 | 方案 | 预估收益 |
|---|---|---|
| 基础镜像过大 | node:20-alpine | -70% 体积 |
| 构建上下文过大 | 添加 .dockerignore | 构建提速 60% |
| 构建依赖残留 | 多阶段构建 + 只拷贝产物 | -300MB |
| 以 root 运行 | 新建 USER node | 安全加固 |
Next steps
- 先加 .dockerignore 验证缓存命中率。
- 拆分 builder/runner 两阶段。
- 用 dive 复查最终层占用。
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
它解决什么问题
为生产编写 Dockerfile 通常会导致图像大小臃肿和安全漏洞。初学者很难在可读性与多阶段构建和层缓存等最佳实践之间取得平衡。
这个技能做什么
- 分析现有的 Docker 配置以识别层冗余。
- 生成结构化优化计划,优先考虑最有影响力的变更。
- 对于刚接触容器化的开发人员来说,将技术术语简化为可操作的步骤。
- 确保中英文技术术语命名的一致性。
- 识别缺失的上下文并提出有针对性的后续问题以填补信息空白。
框架和工具
Docker、Docker Compose、ChatGPT。
为什么比裸提示词强
标准 LLM 提示通常会返回初学者无法实现的通用建议或过于复杂的脚本。这项技能强制执行“结论优先”的报告结构,确保您获得可用的路线图而不是文字墙。
典型用例
- 缩小超大 Node.js 或 Python 应用程序映像。
- 审核 Dockerfile 的安全风险和非 root 用户实施。
- 将传统的单阶段 Dockerfile 转换为高效的多阶段构建。
- 在初级开发团队中标准化容器实践。
局限
需要有关应用程序环境和目标的特定输入,以提供准确的优化。在 ChatGPT 界面中效果最佳。
English · 英文介绍
The problem
Writing Dockerfiles for production often leads to bloated image sizes and security vulnerabilities. Beginners struggle to balance readability with best practices like multi-stage builds and layer caching.
What it does
- Analyzes existing Docker configurations to identify layer redundancies.
- Generates structured optimization plans that prioritize the most impactful changes first.
- Simplifies technical jargon into actionable steps for developers new to containerization.
- Ensures naming consistency between Chinese and English technical terms.
- Identifies missing context and asks targeted follow-up questions to fill information gaps.
Frameworks & tools
Docker, Docker Compose, ChatGPT.
Why this beats prompting it yourself
Standard LLM prompts often return generic advice or overly complex scripts that beginners can't implement. This skill enforces a "conclusion-first" reporting structure, ensuring you get a usable roadmap rather than a wall of text.
Use cases
- Shrinking oversized Node.js or Python application images.
- Auditing Dockerfiles for security risks and non-root user implementation.
- Converting legacy single-stage Dockerfiles into efficient multi-stage builds.
- Standardizing container practices across a junior development team.
Known limitations
Requires specific input regarding the application environment and goals to provide accurate optimizations. Works best within ChatGPT interfaces.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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Click the path to copy it. Create the folder if it does not exist yet.
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