AI Generated Cheatsheets

Docker Cheatsheet

Overview

Docker is a platform for developing, shipping, and running applications in containers.

Installation

Basic Usage

Create a Dockerfile in the root directory of your project.
Define the base image and any additional dependencies or configuration.
Build the Docker image using docker build.
Run the Docker container using docker run.

Dockerfile Syntax

# Use an official Python runtime as a parent image
FROM python:3.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]

The FROM keyword specifies the base image to use.
The WORKDIR keyword sets the working directory for subsequent commands.
The COPY keyword copies files from the host to the container.
The RUN keyword executes a command in the container.
The EXPOSE keyword exposes a port for the container.
The ENV keyword sets an environment variable.
The CMD keyword specifies the default command to run when the container starts.

Commands

docker build: Builds a Docker image from a Dockerfile.
docker run: Runs a Docker container from an image.
docker ps: Lists all running containers.
docker stop: Stops a running container.
docker rm: Removes a stopped container.
docker rmi: Removes an image.
docker-compose: Manages multi-container Docker applications.

Resources

This site is open source. Improve this page.