How to Show All Layers of a Docker Image
JohnDocker images are made up of layers, and many times you'll want to see details on each layer of an image. This guide will show you how to show all layers of a Docker image.
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As an example, we'll check out the layers of the python:3.6 image. So first run:
docker pull python:3.6And use docker history to show the layers.
docker history python:3.6The output of this command will show you details about how each layer was created and the size:
IMAGE CREATED CREATED BY SIZE COMMENT
a5b7afcfdcc8 2 months ago /bin/sh -c #(nop) CMD ["python3"] 0B
<missing> 2 months ago /bin/sh -c set -ex; wget -O get-pip.py 'ht… 6MB
<missing> 2 months ago /bin/sh -c #(nop) ENV PYTHON_PIP_VERSION=10… 0B
<missing> 2 months ago /bin/sh -c cd /usr/local/bin && ln -s idle3… 32B
<missing> 2 months ago /bin/sh -c set -ex && buildDeps=' dpkg-de… 67.3MB
<missing> 2 months ago /bin/sh -c #(nop) ENV PYTHON_VERSION=3.6.5 0B
<missing> 2 months ago /bin/sh -c #(nop) ENV GPG_KEY=0D96DF4D4110E… 0B
<missing> 2 months ago /bin/sh -c apt-get update && apt-get install… 8.73MB
<missing> 2 months ago /bin/sh -c #(nop) ENV LANG=C.UTF-8 0B
<missing> 2 months ago /bin/sh -c #(nop) ENV PATH=/usr/local/bin:/… 0B
<missing> 2 months ago /bin/sh -c set -ex; apt-get update; apt-ge… 556MB
<missing> 2 months ago /bin/sh -c apt-get update && apt-get install… 142MB
<missing> 2 months ago /bin/sh -c set -ex; if ! command -v gpg > /… 7.8MB
<missing> 2 months ago /bin/sh -c apt-get update && apt-get install… 23.2MB
<missing> 3 months ago /bin/sh -c #(nop) CMD ["bash"] 0B
<missing> 3 months ago /bin/sh -c #(nop) ADD file:9572fdb59dfbb9b03… 101MB
What is docker? Docker is a tool that allows you to deploy applications inside of software containers.