docker.txt

https://docs.docker.com/reference/commandline/cli
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docker run -it image-spec /bin/bash
	run and log into container
	can do e.g.
		adduser username sudo
		exit
	Change is not persistent

to exit without quitting container: ctrl-p ctrl-q

containers have names, long/sort IDs

docker ps
	get list of containers
	ps -a: show stopped ones too

docker run -d ...
	run container in detached mode

docker logs shortid
	show output from detached container
	-f: stream the output

docker run -d -P image-spec
	map ports
	(runs default command in image)
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fundamentals

docker commit container-id  username/app:version
	make container into an image

dockerfiles
FROM base-img
RUN cmd e.g. apt-get
	each builds a new layer, so efficient to combine with &&

docker build -t imagename context
	(context is where to look for Dockerfile and other files)

CMD default command
ENTRYPOINT like CMD but can't override, and can pass args in docker run cmd
VOLUME /myvol
EXPOSE 80 44
	ports container will listen on

docker exec -it container-id bash
	run command in running container

docker stop/start container

docker rm container
	delete stopped container

docker rmi image-id
	remove local image copy

docker push repo/name:tag
	push image to docker hub