Docker

Docker Container & Images

[Docker https://www.docker.com/]

Tutorial docker cli, docker-compose, docker swarm

Docker cli

Version

   $ docker -v
   $ docker-compose -v

System

system-wide information

   $ docker system info 

docker disk usage

   $ docker system df 

real time events from the server

   $ docker system events

Status

running containers

   $ docker ps

Images

View all Images

   $ docker images
   $ docker image list

View Image by name

   $ docker images alpine

Image commands

   $ docker image
   build        #
   history      #
   import       #
   inspect      #
   load         #
   ls           #
   prune        #
   pull         #
   push         #
   rm           #
   save         #
   tag          #

Export

export container, these commands has the same result

   $ docker export nginx > nginx_latest.tar
   $ docker export --output="nginx_latest" nginx

docker bash

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

   $ docker run 
   -it                   # interactively
   -d                    # detached
   -p 8080:80            # define external port
   --name MYNAME         # define container name
   -m 300m               # memory limit 
   --memory-swap 1g      #
   --cpuset-cups="1"     # 
   -rm                   # auto remove container after exit
   --workdir "/home"     # Any RUN , CMD , ADD , COPY , or ENTRYPOINT command will be executed in the specified working directory
   -w="/home"            # ^
   -v source:target      # Mount or bind Volume/Directory

run alpine cli sh

   $ docker run -it alpine /bin/sh

run alpine cli detached

   $ docker run -it -d --name MYALPINE -p 8080:80 alpine

run alpine cli with entrypoint

   $ docker run -it --name MYALPINE -p 8080:80 --entrypoint /bin/sh alpine

   $ docker run -it --name MYALPINE -p 8080:80 --entrypoint /bin/sh alpine

EXEC

   $ docker exec it [container-name/id] /bin/sh

Volume/Directory

   $ docker run -it --name MYALPINE -v ${PWD}:/home alpine

   $ docker run -it --name MYALPINE -w='/home' -v ${PWD}:/home alpine

docker File

docker compose