Working woth Docker

docker run hello-world

List Running Containers

bash

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docker ps

Stop a Container

bash

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docker stop [CONTAINER_ID]

Remove a Container

bash

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docker rm [CONTAINER_ID]

List All Containers

bash

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docker ps -a

Build an Image

bash

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docker build -t my-image .

Run a Container from an Image

bash

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docker run -d -p 8080:80 my-image

Pull an Image from Docker Hub

bash

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docker pull nginx

Push an Image to Docker Hub

bash

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docker push [USERNAME]/my-image

6. Writing a Dockerfile

A Dockerfile is used to build custom images. Below is an example for a Python application:

Example:

dockerfile

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# Base image FROM python:3.9-slim # Set working directory WORKDIR /app # Copy application files COPY . /app # Install dependencies RUN pip install -r requirements.txt # Expose port EXPOSE 5000 # Run the application CMD ["python", "app.py"]

Build and Run the Docker Image

1. Build the image:

   bash

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   docker build -t my-python-app .

2. Run the container:

   bash

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   docker run -p 5000:5000 my-python-app

7. Docker Compose

Docker Compose simplifies running multi-container applications using a single YAML configuration file.

Example docker-compose.yml:

yaml

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version: '3.8' services: web: image: nginx ports: - "8080:80" app: build: context: . volumes: - ./app:/app ports: - "5000:5000"

Run the services:

bash

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docker-compose up

8. Advanced Topics

• Networking: Connect multiple containers for communication.
• Volumes: Persist data outside containers.
• Scaling: Use Docker Swarm or Kubernetes for container orchestration.
• Security: Limit container privileges and use secure images.

Dec. 13, 2024, 1:36 p.m.