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Table of Contents
Why Disable the Cache?
How to Build Without Cache
Key Points to Know
When to Use It
Bonus: Clean Up Unused Cache (Optional)
Home Operation and Maintenance Docker How to build a Docker image without a cache?

How to build a Docker image without a cache?

Aug 01, 2025 am 04:34 AM
docker cache

To build a Docker image without using the cache, pass the --no-cache flag to the docker build command; this ensures all layers are rebuilt from scratch, avoiding outdated dependencies or stale layers, which is useful for debugging, ensuring fresh package installations, achieving reproducible builds in CI/CD pipelines, and after changing base images or dependencies, and to clean up unused cache, run docker builder prune or docker builder prune --all for a complete cleanup.

How to build a Docker image without a cache?

To build a Docker image without using the cache, you just need to pass the --no-cache flag to the docker build command.

How to build a Docker image without a cache?

Why Disable the Cache?

Docker caches intermediate layers during the build process to speed things up on subsequent builds. While helpful, this can sometimes cause issues—like outdated dependencies being reused—especially if a RUN command installs packages that have since been updated. When you want a completely fresh build, bypassing the cache ensures every step runs as if it's the first time.

How to Build Without Cache

Use the --no-cache option:

How to build a Docker image without a cache?
docker build --no-cache -t your-image-name:tag .

For example:

docker build --no-cache -t myapp:v1 .

This tells Docker to ignore any cached layers and rebuild everything from scratch.

How to build a Docker image without a cache?

Key Points to Know

  • All layers are rebuilt: Every RUN, COPY, and ADD instruction will execute fresh.
  • Slower builds: Since nothing is reused, expect longer build times.
  • Consistent results: Useful in CI/CD pipelines or when debugging to eliminate cache-related surprises.

When to Use It

You might want to disable the cache in these situations:

  • Debugging a failing build that might be using stale cached layers.
  • Ensuring the latest versions of packages are installed (e.g., apt-get update, npm install).
  • In production build pipelines where reproducibility and freshness are critical.
  • After changing base images or dependencies and suspecting cached layers are interfering.

Bonus: Clean Up Unused Cache (Optional)

Even with --no-cache, old build cache can consume disk space. Periodically clean it with:

docker builder prune

To remove all unused build cache:

docker builder prune --all

This helps maintain a clean environment, especially on shared or resource-limited systems.

Basically, just add --no-cache and you're good—no hidden tricks.

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