Docker and Kubernetes

Welcome to the Docker and Kubernetes Practice Repository!

Introduction

Docker: Docker is a powerful tool for containerization that simplifies the deployment and management of applications.

• Containerization Platform: Docker allows you to package an application along with its dependencies into a standardized unit called a container. This container can then be run on any system that has Docker installed, regardless of the underlying OS.
• Consistency: Docker ensures that the software will always run the same, regardless of where it's deployed, reducing the "it works on my machine" problem.
• Efficiency: Containers share the host system's kernel, making them more lightweight than virtual machines (VMs), which require full OS installations.

See the Terminal saved output of docker practice.

Successfully Dockerized a full stack (React, Spring Boot, and MySQL) project. See the Dockerized project: ExpenseWise. See the Terminal saved output of dockerizing the project and issue faced.

Here's a table of Docker commands used

Command	Description
docker --version	Displays the installed Docker version.
docker pull <image_name>	Downloads the specified image from Docker Hub or another registry.
docker images	Lists all Docker images on your local machine.
docker ps	Lists all running containers.
docker container ls	Alternative command to docker ps for listing running containers.
docker run -d <image_name>	Runs a new container from the specified image in detached mode (-d).
docker info	Provides detailed information about Docker's configuration and status.
docker stop <container_name_or_id>	Stops the specified container.
docker rm <container_name_or_id>	Removes the specified container.
docker ps -a	Lists all containers (running and stopped).
docker ps -aq	Lists all container IDs (quiet mode).
docker run --name <container_name> -p <host_port>:<container_port> <image_name>	Runs a new container with specific port mappings and a name.
docker exec -it <container_id> /bin/sh	Opens an interactive shell inside the specified container.
docker volume ls	Lists all Docker volumes.
docker volume inspect <volume_id>	Provides detailed information about a specific volume.
docker volume create <volume_name>	Creates a new named volume.
docker volume rm <volume_id>	Removes the specified volume.
docker rmi <image_id>	Removes a specific image from the local storage.
docker build --tag <tag_name> .	Builds a Docker image from the Dockerfile in the current directory and tags it.
docker logs <container_name_or_id>	Shows logs from the specified container.
docker history <image_name>	Displays the history of an image, showing how it was built.
docker run --name <container_name> -v <host_path>:<container_path> <image_name>	Runs a new container with a volume mount.
docker run --name <container_name> -v <host_path>:<container_path>:ro <image_name>	Runs a new container with a read-only volume mount.
docker volume create <volume_name>	Creates a named volume for sharing data between containers.
docker inspect <container_id>	Provides detailed information about a specific container.
docker volume prune	Removes all unused volumes.
docker system prune	Cleans up all unused Docker data, including stopped containers, unused images, and networks.

Customized commands Created these custom commands defined in a script and are not actual Docker commands.

Custom Command	Description
docker-volumes	Lists all containers and their volumes.
docker-vol-usage	Lists all containers using a specific volume.
docker-prune-volumes	Stops all running containers, removes all containers, prunes unused volumes, and attempts to remove specific volumes.
docker-logs	Shows the logs of a specified container.
docker-details	Lists all containers with detailed information (ID, Names, Image, Ports, Status).
docker-detailed-vol-usage	Lists all containers using a specific volume with detailed information (ID, Name, Image, Mounts, Ports, Status).

Kubernetes: Kubernetes, often abbreviated as K8s, is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.