Docker

Overview

🖼️ Images	🛠️ Maintenance	⚙️ Operation
Used Images List	Clean Unused	Debugging
🐳 docker-compose.yaml	📦 Dockerfile

Installation

Ubuntu 26

curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo sh get-docker.sh --dry-run
docker --version

Clean Docker

TODO	Command
Run debian image on Windows	# Git Bash winpty docker run --name=debian0 -it debian:12 # Power Shell docker run --name=debian0 -it debian:12
Open shell of running container	docker exec -it mwdev-mediawiki-1 /bin/bash
Copy file from running container	docker cp mwdev-mediawiki-1:/var/www/data/my_wiki.sqlite .
Build image	docker build . docker build -t gdtile:2.1 . docker tag c8abdb693116 gdtile:2.1
Remove exited containers	docker rm $(docker ps -f 'status=exited' -q) sudo docker rm $(sudo docker ps -f 'status=exited' -q)
Remove unused images	docker rmi $(docker images -f "dangling=true" -q) sudo docker rmi $(sudo docker images -f "dangling=true" -q)
run and start it again	docker run --name sandbox0 \ --volume a:b \ -it alpine:3.11 docker start -i sandbox0
Make apt faster	FROM ubuntu:20.04 RUN sed -i 's/\(archive\|security\).ubuntu.com/free.nchc.org.tw/' /etc/apt/sources.list RUN apt update # In host docker run -it ubuntu:20.04 # In container sed -i 's/\(archive\|security\).ubuntu.com/free.nchc.org.tw/' /etc/apt/sources.list apt update
Run	# Mapping directory on Windows, do not use ~ docker run -v C:\Users\User\repos\something:/docroot -it someimage bash docker run -v %USERPROFILE%\repos\webserv:/docroot -it webserv-compose_web bash
test	docker ps --size --all
logs	docker ps logs -ft container

Dockerfile Debugging

TODO	Command
Verify environment variable (stdout won't be printed)	RUN export NVM_DIR="$HOME/.nvm" RUN echo "NVM_DIR=$NVM_DIR" >&2
	docker compose build --progress=plain
	docker compose build --no-cache --progress=plain