Docker 🐳

Setting up Docker

Recently, I just try out docker to seek for alternative for AWS. It turns out it was a pleasant changes I have made.

Day 1: Learning container

What is container?

Container is an instance of the image running as a process.

What is image?

Image is an application that we want to run. Image can be run by many containers.

docker container <subcommand> (options) a basic command to use in docker

<subcommand>

options: standard operation

1. run
   
   • start a new container (always)
   • e.g. docker container run --publish 80:80 nginx
2. start
   
   • start an existing stopped container
3. stop
   
   • stop container

options: check operation in container

1. top
   
   • list all running process in specific container
2. inspect
   • details of one container config
3. stats
   
   • performance stats for all container

options: Getting a shell into container

With Docker cli, there is no need to use SSH , because with pseudo-tty (-t) we are able to simulate a real terminal. -i simply means interactive, allow the terminal to on as always. 1. run -it
- start new container interactively 2. exec -it - run additional command in existing container 3. exit - to exit