Docker-commands.md

Docker Commands

Show installed docker version

docker version

login to your docker hub

docker login

search image

docker search <image-name>

pull the image

docker pull <image-name>

pull image from your repo

docker pull <login-id/repo-name:imagename>
docker pull mkn400/webapp_demo

Docker image

Create Dockerfile

vi Dockerfile
 FROM busybox
 CMD echo "Hello world! This is my first Docker image."

Build image from Dockerfile

docker build .

re-tagging

docker -t <image> <newimage>
docker -t ubuntu ubuntu:20.04

re-tagging for your docker repo

docker -t <existing-image> <hub-user/repo-name:tag>
docker -t ubuntu mkn400/ubuntu:20.04

commit the changes before push

docker commit <hub-user/repo-name:tag>
docker commit mkn400/ubuntu:20.04

Create image from container

docker commit CONTAINER-NAME <docker_account_id>/container:<tage_name>
docker commit webapp mkn400/ubuntu:apache2

save image to tar file

docker save image >> file
docker save nginx >> nginx.tar

Load an image from tar file

docker load -i TARFILE
docker load -i nginx.tar

push image to your docker repo

docker push <docker-username>/<image-name:tag-name>
docker push mkn400/simple-projects:myimage

Delete an image

docker rmi <image-name>

Show a list of all images

docker images

Delete danging images

docker image prune

Delete all unused images

docker image prune -a

Docker Containers

start a new container from image

docker run image
docker run nginx

assign name to container

docker run --name container-name image
docker run --name web nginx

map a ports to container

docker run -p HOST-PORT:CONTAINER-PORT IMAGE
docker run -p 8080:80 nginx

map all ports

docker run -P image
docker run -P nginx

assign a hostname

docker run --hostname HOSTNAME image
docker run --hostname srv nginx

add --dns entry

docker run --add-host HOSTNAME:ip image
docker run --add-host ns1:1.2.3.4 nginx

map a local directory to container

docker run -v HOSTDIR:CONTAINEDIR IMAGE
docker run -v ~/:/usr/share/nginx/html nginx

map a docker volume to the container

docker run -v <VOLUMENAME>:<CONTAINER-DIR>
docker run -v nginxhtml:/usr/share/nginx/html
#if the volume not available automaticaly volume will create

change the entrypoint

docker run -it --entrypoint EXECUTABLE IMAGE
docker run -it --entrypoint bash nginx

run contaner in detach mode

docker run -d IMAGE
docker run -d nginx

Manage Containers

Show a list of containers

docker ps

Show list of all containers

docker ps -a

Delete a container

docker rm CONTAINER / ID
docker rm web

Delete running container

docker stop <CONTAINER-NAME / ID >
docker rm <CONTAINER-NAME / ID >
docker stop web
docker rm web

OR

docker rm -f CONTAINER / ID
docker rm -f web

Delete stoped containers

docker container prune

Stop a running container

docker stop CONTAINER
docker stop web

Start a stoped container

docker start CONTAINER
docker start web

Copy a file from container to host

docker cp CONTAINER:SOURCE TARGET
docker cp web:/index.html index.html

Copy a file from container to host

docker cp TARGET CONTAINER:SOURCE
docker cp index.html web:/index.html

Start a shell inside a running container

docker -it CONTAINER EXECUTABLE
docker -it web bash

Rename a container

docker rename OLD_NAME NEW_NAME
docker rename 096 web

or

docker rename web webapp

Create an image out of container

docker commit CONTAINER
docker commit web

info & status

Show the logs of the container

docker logs CONTAINER-NAME
docker logs web

Show the status of running containers

docker status

Show the processes of container

docker top CONTAINER-NAME
docker top web

Get detailed information of object

docker inspect CONTAINER-NAME
docker inspect web

Show all modified files in container

docker diff CONTAINER-NAME
docker diff web

Show mapped ports of container

docker port CONTAINER-NAME
docker port web

Docker Volumes Docker Networking

Simple Project WordPress

The projects contains two container of httpd and mysql integrated each.