Lets understand Docker in 2024

What is Docker?

Docker is a platform that enables developers to build, deploy, and run applications in containers. Containers are lightweight, portable, and self-sufficient units that package an application and all its dependencies, ensuring that it runs consistently across different computing environments.

How Docker Works

Docker uses a client-server architecture. The Docker client communicates with the Docker daemon, which does the heavy lifting of building, running, and distributing your Docker containers. Here’s a brief overview of how Docker works:

  1. Dockerfile: Developers write Dockerfiles, which are scripts that contain a series of instructions on how to build a Docker image. A Docker image is a lightweight, standalone, and executable package that includes everything needed to run a piece of software.
  2. Docker Image: Using the Dockerfile, a Docker image is created with the docker build command. Images can be stored in a Docker registry such as Docker Hub or a private registry.
  3. Docker Container: Containers are runtime instances of Docker images. A container includes the application and its dependencies but shares the kernel of the host operating system, making it lightweight and efficient.
  4. Docker Registry: A service for storing and distributing Docker images. Docker Hub is the default registry where Docker images can be uploaded and shared.

Lifecycle of Containers

  1. Create: A container is created from a Docker image using the docker create or docker run command.
  2. Start: The container is started with the docker start command.
  3. Running: The container is now running and executing the application.
  4. Pause/Unpause: A running container can be paused and unpaused using docker pause and docker unpause.
  5. Stop: The container can be stopped with the docker stop command.
  6. Kill: If a container needs to be forcibly stopped, the docker kill command is used.
  7. Restart: A container can be restarted using the docker restart command.
  8. Remove: Once a container is no longer needed, it can be removed using the docker rm command.

Top 10 Docker Commands

  1. docker run [OPTIONS] IMAGE [COMMAND] [ARG…]
    • Run a new container from an image.
  2. docker ps
    • List running containers.
  3. docker build [OPTIONS] PATH | URL | –
    • Build an image from a Dockerfile.
  4. docker images
    • List all Docker images on the system.
  5. docker pull [OPTIONS] NAME[|@DIGEST]
    • Pull an image from a Docker registry.
  6. docker push [OPTIONS] NAME[]
    • Push an image to a Docker registry.
  7. docker exec [OPTIONS] CONTAINER COMMAND [ARG…]
    • Run a command in a running container.
  8. docker logs [OPTIONS] CONTAINER
    • Fetch the logs of a container.
  9. docker stop [OPTIONS] CONTAINER [CONTAINER…]
    • Stop one or more running containers.
  10. docker rm [OPTIONS] CONTAINER [CONTAINER…]
    • Remove one or more containers.

These commands provide a foundation for working with Docker, allowing you to manage images, containers, and the overall Docker environment effectively.

Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

10 Comments
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
Ariel Balduzzi
Ariel Balduzzi
1 month ago

1) What is Docker?
Container management tool

2) How Docker works?
Docker uses resource isolation in the OS kernel to run multiple containers on the same OS. It downloads and run container images from registries.

3) Lifecycle of Containers?
Created, Running, Paused, Stopped, Deleted

4) Top 10 Docker Commands?
docker ps
docker images
docker pull
docker create
docker run
docker start
docker pause
docker unpause
docker kill
docker restart
docker rm

Quek
Quek
1 month ago

1. Docker is a container mgmt tool which allow to run multiple apps with less resources.

2. it make use of a dockerfile which contains the set of instructions for building a Docker Image. 
A Docker Image serves as a template for creating Docker containers. It contains all the necessary code, runtime, system tools, libraries, and settings required to run a software application.

3. create -> start -> stop -> start -> restart -> pause -> unpause – > kill – > remove

4. docker create, 
docker run,
docker pause
docker unpause
docker start
docker stop
docker restart
docker kill
docker rm 
docker ps

Mahendar Singh
Mahendar Singh
1 month ago

What is Docker?
Docker is an platform that automates the deployment, scaling, and management of applications using containerization. It allows you to package an application with all of its dependencies into a standardized unit called a container.

How Docker Works:

Docker uses a client-server architecture.
The Docker client talks to the Docker daemon,
Docker images are read-only templates used to create containers.
Containers are runnable instances of images.
Docker registries store Docker images. Docker Hub is a public registry that anyone can use.

Lifecycle of Containers:

Create,Run, Pause/Unpause, Stop, Restart,Kill, Remove

Top 10 Docker Commands:
docker run
docker ps
docker images
docker pull
docker build
docker stop
docker rm
docker rmi
docker exec
docker logs

Marcin Kenar
Marcin Kenar
1 month ago

answer at question 1
Docker is a solution which allow you to created virtual environment – containers where different services can work on it. It allows you to created a lot virtual systems (containers) where application/microservice/service/script whatever can run inside.
answer at question 2
Docker download (pool image) and start it on local machine. Such image can be
start/stop/remove, we can login inside, we can run command inside whatever we want
answer at question 3
created;
started;
running/paused
stopped/killed
removed
answer at question 4
docker pool “image”
docker start “image”
docker stop “image”
docker pause “image”
docker rm “image”
docker container ls etc …

Slawomir Koper
Slawomir Koper
1 month ago

What is Docker?

Docker use os-level virutalization to run platform as a service applications in very simple and fast way.

How Docker works?

Docker manage containers – every container can be a different application. Container can be started/stopped/restarted/paused… in similar bur simplest way as virtual machine.

Lifecycle of Containers?

created – running – stopped – paused – killer

Top 10 Docker Commands?

  • docker create
  • docker ps
  • docker start
  • docker stop
  • docker restart
  • docker rm
  • clear
  • docker images
  • docker pause
  • docker unpause
Kuu
Kuu
1 month ago

What is Docker?

Docker is an open-source platform designed to automate the deployment, scaling, and management of applications using containerization. Containers are lightweight, portable, and self-sufficient units that include everything needed to run a piece of software, including the code, runtime, system tools, libraries, and settings.

How Docker works?
Docker able to operate through a client-server architecture and leverage containerization to encapsulate applications and their dependencies in isolated environments.

Lifecycle of Containers?
It involves several stages from its creation to its removal.

Create container
$ docker create –name ubuntu-cont ubuntu
Run docker container
$ docker run -itd ubuntu
$ docker run -itd –name ubuntu-cont ubuntu
Pause container
$ docker pause <container-id/name>
Unpause container
$ docker unpause <container-id/name>
Start container
$ docker start <container-id/name>
Stop container
$ docker stop <container-id/name>
Restart container
$ docker restart <container-id/name>
Kill container
$ docker kill <container-id/name>
Destroy container
$ docker rm <container-id/name>

Top 10 Docker Commands?
docker run
docker ps
docker build
docker images
docker pull
docker stop
docker start
docker rm
docker rmi
docker exec

Prapasri
Prapasri
1 month ago

What is Docker?
#Container management tool
 
How Docker works?
# The Docker daemon runs on the host operating system and manages Docker containers. It handles tasks such as building, running, and distributing containers. Once you issue commands through the Docker CLI, they communicate with the Docker daemon, enabling it to build, manage, and run Docker containers.

Lifecycle of Containers?
#5 phase :
1.Create 2. Run 3.Pause/Unpause 4. Stop 5. Kill

Top 10 Docker Commands?
# docker –version
docker search wordpress
docker pull wordpress
docker run hello-world
docker ps
docker ps -a
docker start 3ac6a4cf7b0c
docker stop 3ac6a4cf7b0c
docker restart 3ac6a4cf7b0c
docker rm 3ac6a4cf7b0c

Piotr Jaskiewicz
Piotr Jaskiewicz
1 month ago

What is Docker?
Docker is similar to virtual machine, but it’s more lightweight. Docker is using standalone containers that have got all necessary software to run applications.

How Docker works?
To run the docker first you need an image, then you can create a container. In a container you can run application.

Lifecycle of Containers?
Create, start, run, pause, unpause, stop, restart, kill, destroy

Top 10 Docker Commands?
docker images
docker ps
docker pull
docker create
docker start
docker stop
docker restart
docker pause
docker unpause
docker kill

Cesar Gonzalez - México
Cesar Gonzalez - México
1 month ago

How Docker works?

Docker’s higher level of architecture revolves around a client-server model, where the client interacts with the Docker daemon (server) to manage containers and related resources. At its core, Docker consists of three key components: the client, the daemon, and images. Client and daemon communicate using a REST API, over UNIX sockets or a network interface

Lifecycle of Containers?

Docker container lifecycle consists of five states: creation, running, paused, stopped, and killed or deleted

Top 10 Docker Commands?

1- Docker Run
2- Docker Pull
3- Docker PS
4- Docker Stop and Docker Start
5- Docker Logs
6- Docker Exec
7- Docker Build
8- Docker Images
9- Docker RMI
10- Docker Network

Pablo Rossi
Pablo Rossi
1 month ago

What is Docker?Docker is an open-source platform designed to automate the deployment, scaling, and management of applications. It achieves this through containerization, which packages an application and its dependencies into a standardized unit called a container. Containers are lightweight, portable, and ensure that the application runs consistently across different environments.

How Docker works?
Docker simplifies the process of deploying, managing, and scaling applications by using containerization. Containers ensure consistency across different environments, as they encapsulate everything needed to run an application.

Lifecycle of Containers?
Create container

Run docker container

Pause container

Unpause container

Start container

Stop container

Restart container

Kill container

Destroy container

Top 10 Docker Commands?

docker create
docker ps
docker start
docker stop
docker restart
docker pause
docker unpause
docker kill
docker rm
docker exec

10
0
Would love your thoughts, please comment.x
()
x