DOCKER INTRODUCTION

Docker Introduction

DOCKER

What is Docker?

Docker is an open-source and containerization platform that enables developers to build, run and deploy applications quickly.

Docker package application, including all its libraries, configurations, and dependencies.

Docker automates the deployment of applications inside containing that boot up in seconds.

Managing application dependencies and configuration is a crucial task for the DevOps team, and Docker has all capabilities to handle, this kind of problem in the software development lifecycle.
Docker helps us to build and deploy distributed microservice applications with the help of continuous integration and continuous deployment pipeline and saves a lot of time.
Docker uses the Container as a unit of software that packages applications code with all its dependence so the applications can run quickly in an isolated environment.

Application Portability:-- Docker is the container base that performs and allows running containers on a physical machine, virtual machine, and any other cloud provider in less time without modification.
Faster delivery and deployment:-- Docker enables us to build and deploy application images across every step of the deployment phase efficiently.
Scalability:-- Docker is scalable because it can increase and decrease the number of application instances in different environments.
Isolation:-- Docker containerizes and runs the application in an isolated environment with all dependencies and configurations.
Security:-- Docker ensures the applications running inside the different containers are isolated from each other, and it has different security layers and tools to manage that thing.
High performance:-- Docker is generally faster and takes fewer resources than VMs.
Version Control Management:-- Docker provides versioning-related things that can track container versions and roll back the same if required.

Docker clients:- Docker client is used by users through CLI with different commands like docker run, docker build, and communication with the docker daemon server through REST APIs.
Docker image:-- A docker file is a text file consisting of a set of instructions that the docker uses to build the docker image.
Docker container:-- A docker container is the running instance of a docker image, which runs In its isolated environment.
Docker hub:-- Docker hub is a cloud-based service to push and pulls different available images.
Docker registry:-- docker registry is a system for storing, distributing, and managing different versions of docker images.

DOCKER