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5 Docker optimization tips that can save our team hours

   5 Docker optimization tips that can save our team hours



Slow docker builds can kill developers' productivity and waste precious CI/CD minutes (and money)


Here are my top Docker build tips that actually work:


🔹 𝗘𝗽𝗵𝗲𝗺𝗲𝗿𝗮𝗹 𝗖𝗼𝗻𝘁𝗮𝗶𝗻𝗲𝗿𝘀

- Design containers to be disposable

- Make them easy to rebuild and replace

- Minimize setup and configuration


🔹 𝗠𝗶𝗻𝗶𝗺𝗶𝘇𝗲 𝗟𝗮𝘆𝗲𝗿𝘀

- Only RUN, COPY, and ADD create layers

- Combine related commands in single RUN

- Copy only necessary artifacts


🔹 𝗟𝗲𝘃𝗲𝗿𝗮𝗴𝗲 𝗕𝘂𝗶𝗹𝗱 𝗖𝗮𝗰𝗵𝗲

- Order instructions from least to most frequently changed

- Keep stable commands at the top

- Place volatile commands at the bottom


🔹 𝗜𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁 .𝗱𝗼𝗰𝗸𝗲𝗿𝗶𝗴𝗻𝗼𝗿𝗲

- Exclude unnecessary files/directories

- Prevent sensitive data exposure

- Reduce context size


🔹 𝗗𝗲𝗰𝗼𝘂𝗽𝗹𝗲 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀

- One process per container

- Separate dependent services

- Use Docker networks for communication


💡 Sort multi-line arguments alphabetically → to avoid duplication of packages


These tips have helped companies reduce build times and image sizes 🚀


What's your favorite Docker tip? 🤔

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