¿Cómo cambio el tamaño de una imagen en Docker?

How do I resize an image in Docker?

We need a faster pool

1. Stop the Docker daemon.
2. Wipe out /var/lib/docker .
3. Create the storage directory: mkdir -p /var/lib/docker/devicemapper/devicemapper .
4. Create a data symbolic link in that directory, pointing to the device: ln -s /dev/sdb /var/lib/docker/devicemapper/devicemapper/data .
5. Restart Docker.

Yes it’s normal size. The image contains an operating system image and various packages and that’s why the size.

Python: Disable caching in pip with the –no-cache-dir flag. apt-get: Use the –no-install-recommends flag when installing packages and clean up with apt-get clean && rm -rf /var/lib/apt/lists/*

Here’s some tips that can help reduce their sizes.

1. Tip #1 — Use a smaller base image.
2. Tip #2 — Don’t install debug tools like vim/curl.
3. Tip #3 — Minimize Layers.
4. Tip #4 Use — no-install-recommends on apt-get install.
5. Tip #5 Add rm -rf /var/lib/apt/lists/* to same layer as apt-get installs.
6. Tip #6 Use FromLatest.io.

This is 118 MB per image, or *11.8%* of the image size reported by the docker image command. In the second example, all these images differ only in the larger layer (the 980 MB one) and share the smaller layer (the 20 MB one). The total disk consumption is: *20 + 10*980 = 20 + 9800 = 9820 MB*.

The official Docker Python image in its slim variant—e.g. python:3.9-slim-buster —is a good base image for most use cases. it’s 41MB to download, 114MB when uncompressed to disk, it gives you the latest Python releases, it’s easy to use and it’s got all the benefits of Debian Buster.

1 Answer. Because usually docker images contains only necessary minimum – in case of ubuntu image, only base system, without GUI (which is rarely used in containers) and without most tools. Ubuntu image actually relatively big – there are much smaller ones.

What really matters when it comes to disk usage is the size of frequently changing layers. As a side note: reducing base image size usually comes at a price – the smaller the image size, the smaller the functionality. When a Docker image is uploaded or downloaded (pushed or pulled), each image layer is transferred separately.

In the case of the .NET Core images we’ve been building at work recently, this is most easily accomplished using Docker’s multi-stage build feature. This will be a fairly light introductory article on multi-stage builds and size optimisation. Scott Hanselman has a great, more detailed post which also discusses building for ARM architectures.

Start-up time. When running your application in production, the creation of new containers running your image (either for scale-out operations or deployment of new image versions) will often involve downloading the latest version of your application image.

Base image size does not matter. Thus, reducing base image size in an attempt to reduce total disk consumption is meaningless (except in some borderline cases when the disk is unrealistically small). What really matters when it comes to disk usage is the size of frequently changing layers.