docker-notes.md

Docker build process

inside the respective folder (eg: ./ssh/)

docker build -t {tagname} . docker build -t $(basename "$PWD") .

running the build

docker run -d -P --name {tagname} {container_name} docker run -d -P --name $(basename "$PWD") $(basename "$PWD")

-d : detach mode -P : auto publish all ports -e : set env key=value pairs

adding listener port

docker port containername XPortNum

Useful command chains

build, run

docker build -t $(basename "$PWD") . && docker run -d -P --name $(basename "$PWD") $(basename "$PWD");

nuke all, build, run

docker rm $(docker ps -a -q); docker build -t $(basename "$PWD") . && docker run -d -P --name $(basename "$PWD") $(basename "$PWD");

stop all, nuke all, build, run

docker stop $(docker ps -aq); docker rm $(docker ps -a -q); docker build -t $(basename "$PWD") . && docker run -d -P --name $(basename "$PWD") $(basename "$PWD");

Stop current "basename", Nuke it, Build it, Run it

docker stop $(docker ps -a | grep $(basename "$PWD") | awk '{print $1}'); 
docker rm $(docker ps -a | grep $(basename "$PWD") | awk '{print $1}');
docker build -t $(basename "$PWD") . && 
docker run -d -P --name $(basename "$PWD") $(basename "$PWD");

Or as a single line

docker stop $(docker ps -a | grep $(basename "$PWD") | awk '{print $1}'); docker rm $(docker ps -a | grep $(basename "$PWD") | awk '{print $1}'); docker build -t $(basename "$PWD") . && docker run -d -P --name $(basename "$PWD") $(basename "$PWD");

Docker commands

Delete all containers

docker rm $(docker ps -a -q)

Delete all images

docker rmi $(docker images -q)

ENTRYPOINT vs CMD

• ENTRYPOINT is runs WITH cmd,
• CMD is commonly overwritten by user
• Technically user can overwrite ENTRYPOINT with additional command "flags"
• Final executed command : ENTRYPOINT CMD