Docker for Java Developers

Explore why Docker matters in software development, learn core concepts, set up Docker, run a container, build a Spring Boot application in Docker, and manage multi-container setups with Docker Compose.

Understand the problem of environment mismatch when sharing projects across development, testing, and production, causing works on my machine failures. Learn how virtualization addresses this before introducing docker.

Explore virtualization concepts, including host and guest operating systems, hypervisors, and virtual machines, and see how containerization offers a lighter, isolated alternative for deploying apps.

Learn how containerization replaces heavy virtual machines by packaging applications with all dependencies into portable Docker containers, enabling isolation, portability, and consistent deployments.

Discover how Docker provides a platform and tools for containerization, including the Docker engine, containers, and images, plus Docker Hub, networking, volumes, and compose.

Set up Docker on Windows or Mac by downloading Docker Desktop, verify installation with docker version, and pull and run images to explore containers and Docker Engine.

Explore how to run your first container with Docker Desktop, pull official images from Docker Hub, and manage containers using docker run, docker pull, and docker ps.

Explore essential docker commands for java developers, including search, pull, create, run, start, stop, pause, and remove containers and images, with a practical step-by-step workflow.

Explore how the Docker client communicates with the Docker daemon and API to pull images, run containers, and manage networks, volumes, and public or private registries.

Learn to run a Java development environment inside Docker by pulling an OpenJDK image, selecting the right tag for your architecture, and executing jshell and Java commands.

build a spring boot web app from start.spring.io, package it as a jar with mvn package, run on port 8081, and prepare rest-demo.jar for docker container use.

Copy the jar into the container, commit the container to an image, and run it with Java -jar to deploy the Spring Boot app on port 8081, exposing the port.

Learn to automate java image creation with a dockerfile using openjdk, copy rest demo.jar, set entrypoint java -jar, and build and run with docker build and docker run.

Learn to run two containers, a spring boot web app, and a Postgres database, connect them, and use Docker Compose for multi-container workloads.

Learn to dockerize a spring boot app with postgres using docker compose, build the jar, create a dockerfile, and run app and postgres in separate containers with configured ports.

Learn to run multiple containers with Docker Compose, connect the app to a Postgres container via container networking, align ports and networks, and introduce volumes to persist data.

Learn how to persist data in Docker containers by using volumes and Docker Compose to store database data on the host, ensuring data survives restarts.