Docker Essentials for Cloud and DevOps Professionals

About Docker Essentials for Cloud and DevOps Professionals

A warm welcome to the

Docker Essentials for Cloud and DevOps Professionals

course by

Uplatz

.

Docker

is an open-source platform that enables developers to build, ship, and run applications inside lightweight, portable containers. Containers package an application and its dependencies together, ensuring consistency across development, testing, and production environments. Docker eliminates the "it works on my machine" problem by providing a consistent runtime environment. Docker is widely used for microservices architectures, DevOps workflows, and simplifying deployment processes across environments.

How Docker Works

1.

Containerization

Docker uses containerization technology to isolate applications from the underlying system. Containers share the host operating system kernel, making them more lightweight and efficient than traditional virtual machines. 2.

Docker Architecture

Docker Engine

: The core runtime responsible for creating and managing containers.

Docker Client

: A command-line interface (CLI) that interacts with the Docker Engine.

Docker Images

: Pre-configured application blueprints used to create containers.

Docker Hub

: A cloud-based registry for storing and sharing Docker images. 3.

Workflow

Developers write a

Dockerfile

containing instructions to build an image.

The image is created using the docker build command.

The image is then used to launch containers using the docker run command. 4.

Orchestration

Tools like Docker Compose and Docker Swarm allow users to manage multi-container applications and scale them efficiently.

Core Features of Docker

1.

Containerization

: Run applications in isolated environments to ensure consistency across platforms. 2.

Portability

: Docker containers can run on any system that supports Docker, whether on-premises or in the cloud. 3.

Lightweight

: Containers share the host OS kernel, using fewer resources compared to virtual machines. 4.

Scalability

: Easily scale applications horizontally by creating multiple container instances. 5.

Docker Hub

: Provides a central repository for discovering, pulling, and sharing container images. 6.

Versioning

: Allows version control for images, enabling rollbacks to previous builds. 7.

Security

: Provides container isolation to minimize application vulnerabilities. 8.

Efficiency

: Enables faster application development and deployment through CI/CD pipelines. 9.

Automation

: Supports tools like Docker Compose for defining and managing multi-container applications. 10.

Orchestration Support

: Includes built-in orchestration with Docker Swarm and compatibility with Kubernetes.

Docker Essentials for Cloud and DevOps Professionals - Course Curriculum

1.

Introduction

Microsystem & Containerization

Challenges with Deployments

What is Virtualization

Problems with Virtualization

Containerization Introduction

What is Docker

Docker Features

Applying the Solution with Docker 2.

Docker Installation

Install Docker

Start Docker Service

Stop Docker

Uninstall Docker

ECS Introduction 3.

Docker Architecture

Docker Client

Docker Engine 4.

Dockerfile

Writing Dockerfile

Creating Dockerfile

Visual Source Code IDE

Understanding the Instructions used in Dockerfile:

FROM

MAINTAINER

COPY

ADD

RUN

CMD

ENTRYPOINT

VOLUME 5.

Docker Images

Understanding the Base Image

Image Layered Structure

Internals of Docker Image

Build Process of Docker Images

Tagging the Images

Image Generation with Docker Commit

Run, Inspect, Remove, and Prune Images 6.

Docker Hub

Docker Hub Account Creation 7.

Docker Commands

docker version

docker info

docker help

docker images

docker pull

docker rmi

docker ps

docker login

docker push

docker rm 8.

Docker Containers

Running Docker Containers from Images

Listing Running Containers

Container Lifecycle

Start, Stop, and Restart Containers

Removing the Containers

Container with Dependencies (Multi Containers)

Starting Containers in Shell

Running Containers in Bash Mode Using IT Flag

Container Isolation 9.

Docker Volume

Advantages

Bind Mounts

Volumes Over Bind Mounts

Creating Volumes

List All Volumes

Run Container on Volumes

Remove Volumes 10.

Docker Compose

Installation

Docker Compose File

Check the Validity of the File

Run Docker Compose

Stop Docker

Scale the Containers 11.

Docker Swarm

Container Orchestration

Features of Docker Swarm

Docker Swarm Node Manager

Create Worker Nodes

Run Containers on Swarm

Scaling the Services

Benefits of Learning Docker

1.

Improved Development Efficiency

Speeds up development by creating consistent environments across systems.

Eliminates "works on my machine" issues through standardized containers. 2.

Enhanced Deployment Processes

Simplifies the deployment of applications on various platforms.

Facilitates continuous integration and continuous delivery (CI/CD) pipelines. 3.

Portability

Docker containers can run on any platform, including on-premises systems, public clouds, and private clouds. 4.

Cost-Effectiveness

Reduces infrastructure costs by maximizing resource utilization compared to virtual machines. 5.

Scalability

Makes scaling applications horizontally simple by using container orchestration tools like Docker Swarm or Kubernetes. 6.

Skill Relevance

Knowledge of Docker is in high demand as organizations adopt containerization and cloud-native architectures. 7.

Simplified Collaboration

Teams can collaborate more effectively by sharing pre-configured Docker images. 8.

Foundation for Advanced Technologies

Provides a foundation for learning related technologies like Kubernetes, Helm, and microservices architecture.

Career Scope of Docker

Learning Docker not only boosts your employability but also keeps you at the forefront of technology trends in the modern software ecosystem. 1.

High Demand in the Job Market

Companies across industries are adopting containerization to streamline development and operations.

Docker skills are essential for roles in DevOps, cloud computing, and modern software development. 2.

Job Roles Requiring Docker Skills

DevOps Engineer

Cloud Engineer

Site Reliability Engineer (SRE)

Software Developer

Platform Engineer

Infrastructure Engineer

Build and Release Engineer

3.

Opportunities in Microservices and Cloud

Docker is a cornerstone of microservices architecture and is widely used in cloud-native application development. 4.

Integration with Other Technologies

Docker skills complement tools and platforms like Kubernetes, Jenkins, Terraform, and AWS/GCP/Azure services. 5.

Freelance and Consulting Opportunities

Many organizations need consultants to set up Dockerized workflows or migrate legacy systems to containers. 6.

Higher Salaries

Professionals with Docker expertise often command higher salaries due to the demand for containerization skills. 7.

Career Growth

Mastery of Docker can lead to advanced career paths, including:

Cloud Architect

DevOps Manager

Solutions Architect

Technical Lead for Cloud-Native Applications