Docker
How to use docker
Best-practices
Aka optimizations
Perform your add & remove operations in the same RUN command. Doing them separately creates two separate layers which inflates the image size.
This creates two image layers - the first layer has all the added foo, including any intermediate artifacts. Then the second layer removes the intermediate artifacts, but that's saved as a diff against the previous layer:
RUN ./install-foo RUN ./cleanup-foo
This creates a single layer which has only the foo artifacts you need.
This why the official Dockerfile best practices show the apt cache being cleaned up in the same RUN command:
RUN apt-get update && apt-get install -y package-bar package-baz package-foo && rm -rf /var/lib/apt/lists/*
Lint and security:
Docker compose
Aka compose.yaml
(or docker-compose.yml
or compose.yml
)
Alpine
http://nl.alpinelinux.org/alpine/v3.11/main/ http://dl-cdn.alpinelinux.org/alpine/edge/community
https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/main/alpine-mirrors/mirrors.yaml
How docker works
AMP
Aka LAMP, Linux Apache MySQL PHP
Virtual Machine
If the host is not Linux or the image use on other OS use a virtual machine container
macOS
Install on Virtual Machine
Volumes
WebAssembly
Aka wasm
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