Docker

It is a containerising tool that is used to make a full environment app so that there is no dependency issues when others try to build the same app.

Installation

we can install docker in two ways

1. Docker Desktop
2. Docker Engine

Docker Desktop

Docker Desktop is a software application that enables developers to build, package, and run applications using Docker containers on their local machines. It provides an easy-to-use graphical interface and includes the necessary tools and components for managing Docker containers, such as the Docker engine, images, and networking capabilities.

For more information, see [[DOCKER DESKTOP]]

Docker Engine

One click installation script:

Run docker as non root user:

Check out the Install Docker Enginefor more info.

Using Docker

Building Image

The "." here tells to use Dockerfile in current folder also you have to be in directory where a Dockerfile is present. You need to [[DOCKERIZE]] your app/project before building the image.

Running Containers

COMMAND	DESCRIPTION
docker run <image>	Start a new container from an image
docker run -it <image>	Start a new container in interactive mode
docker create <image>	Create a new container
docker start <container>	Start a container
docker stop <container>	Graceful stop a container
docker kill <container>	Kill (SIGKILL) a container
docker restart <container>	Graceful stop and restart a container
docker pause <container>	Suspend a container
docker unpause <container>	Resume a container
docker rm <container>	Destroy a container

Inspect Containers

COMMAND	DESCRIPTION
docker ps	List running containers
docker ps --all	List all containers, including stopped
docker logs <container>	Show a container output
docker logs -f <container>	Follow a container output
docker top <container>	List the processes running in a container
docker diff	Show the differences with the image (modified files)
docker inspect	Show information of a container (json formatted)

Images

COMMAND	DESCRIPTION
docker image ls	List all local images
docker history <image>	Show the image history
docker inspect <image>	Show information (json formatted)
docker tag <image> <tag>	Tag an image
docker commit <container> <image>	Create an image (from a container)
docker import <url>	Create an image (from a tarball)
docker rmi <image>	Delete images
docker pull <user>/<repository>:<tag>	Pull an image from a registry
docker push <user>/<repository>:<tag>	Push and image to a registry
docker search <test>	Search an image on the official registry
docker login	Login to a registry
docker logout	Logout from a registry
docker save <user>/<repository>:<tag>	Export an image/repo as a tarball
docker load	Load images from a tarball

Executing Commands

COMMAND	DESCRIPTION
docker attach <container>	Attach to a container
docker cp <container>:<container-path> <host-path>	Copy files from the container
docker cp <host-path> <container>:<container-path>	Copy files into the container
docker export <container>	Export the content of the container (tar archive)
docker exec <container>	Run a command inside a container
docker exec -it <container> /bin/bash	Open an interactive shell inside a container (there is no bash in some
docker wait <container>	Wait until the container terminates and return the exit code

Volumes

COMMAND	DESCRIPTION
docker volume ls	List all vol1umes
docker volume create <volume>	Create a volume
docker volume inspect <volume>	Show information (json formatted)
docker volume rm <volume>	Destroy a volume
docker volume ls --filter="dangling=true"	List all dangling volumes (not referenced by any container)
docker volume prune	Delete all volumes (not referenced by any container)

You can also push your built images to [[DOCKER HUB]] for future use and sharing.