Docker

docker commands

run-start a container

docker run nginx

ps-list containers

docker ps  #list all running containers

docker ps -a  #list all containers

stop-stop a container

docker ps
docker stop silly_sammet
docker ps -a

rm-remove a container

docker rm silly_sammet
docker ps -a

images-list images

docker images

rmi-remove images

docker rmi nginx

pull-download an image

docker run nginx   # if can't find locally then pull from the repository
docker pull nginx

exec-execute a command

docker exec container_name cat /etc/hosts

run-attach and detach

docker run kodekloud/simple-webapp
docker run -d kodekloud/simple-webapp
docker attach sha_numbers

docker run

run-tag

docker run redis
docker run redis:4.0  #image:tag

run-port mapping

docker run -p 80:5000 kodekloud/simple-webapp  #  host_port:container_port

run-volume mapping

docker run -v /opt/datadir:/var/lib/mysql mysql  # docker_host_address:container_address

inspect container

docker inspect container_name

container logs

docker logs blissful

docker environment variables

set environment variables

docker run -e APP_COLOR=blue simple-webapp-color
docker run -e APP_COLOR=green simple-webapp-color
docker run -e APP_COLOR=pink simple-webapp-color

inspect environment variables

docker inspect blissful_hopper

docker images

how to create my own image

Dockerfile

FROM Ubuntu  # 1.OS-Ubuntu

RUN apt-get update  # 2.Update apt repo
RUN apt-get install python # 3. Install dependencies using apt

RUN pip install flask  # 4. Install python dependencies using pip
RUN pip install flask-mysql

COPY . /opt/source-code  # 5. copy source code to /opt folder

ENTRYPOINT FLASK_APP=/opt/source-code/app.py flask run  # 6. run the web server using flask command

docker build Dockerfile -t mmumshad/my-custom-app
docker push mmumshad/my-custom-app   # docker registry

Docker networking

Docker storage

Docker compose

Docker registry