Docker Commands end to end

• docker run - Run a container from an image
• docker start - Start a container that has been stopped
• docker stop - Stop a running container
• docker kill - Kill a running container
• docker rm - Remove a container

Dockerfile

CMD ["/app/start.sh"] : This CMD command runs as soon as you run the container ( not at the build time ) , only at the run time this command works and easily gets overwritten by something like this docker run -it <image_name> ./bin/bash now bin/bash will run as the entry point !! `` :

Building Image from a Dockerfile

Once you have created the Dockerfile, now you need to

So this builds an Image named ‘backend’, and we need to specify the ‘.’ at the end that tells it to search for Dockerfile from here !! docker build --tag "backend" --file Dockerfile . This takes some time to build the image

Once done, now check for docker images : This looks up for the docker images created from the last command

Docker in interactive mode

Here this -i is the interactive mode but this looks like shit !!

docker run -i image_name /bin/bash

So we need to attach the -t ( tty ) to it to look good and usable

docker run -it image_name -p <host_port>:<container_port> /bin/bash 

Docker in detached mode

docker run -d image_name

After docker container is up and running

docker exec -it ed4f1a1d1880 /bin/bash : Opens up a new terminal inside that container to interact with the processes running in the container.