Docker
2 minutes of reading
Docker is a platform that helps containerize applications. Containerization is the process of isolating an application from the environment in which it runs, so that the application can run on different operating systems without modifying the code.
Docker is a PaaS solution. It hit the market in 2013 and has become the most popular solution nowadays for application containerization. It allows you to freeze the state of an application with a series of commands and recreate it on any other hardware that has Docker installed.
Docker has a simple declarative language
Most people use Docker to recreate a version of their software in the same state on any other computer. Docker images are created using Dockerfile files. These files use instructions such as:
- FROM
- RUN
- CMD
- ENTRYPOINT
- VOLUME
- WORKDIR
- COPY
- EXPOSE
FROM python:3.9
ENV PYTHONUNBUFFERED 1
RUN apt-get update
# Pozwala dockerowi na zapamiętywanie zależności w naszej aplikacji
COPY ./requirements.txt requirements.txt
COPY ./requirements requirements
RUN pip install -r requirements.txt
# Dodaj naszą aplikację do kontenera
COPY . code
WORKDIR code
RUN python manage.py collectstatic --noinput
CMD ["sh", "-c", "gunicorn app.wsgi -b :8000 --log-file -"]
These are just some of them and the most popular. With them we can download another container created by another user using FROM, copy data using COPY from a local file source that is our own computer, execute a series of commands using RUN. Each command will create incrementally successive layers of the docker container. The most interesting thing is that when building the container again and changing the RUN command, the entire previous series of commands is remembered accordingly. Thanks to this, after minor changes, containers can be built really fast. At the very end, we can set the CMD that will be run when the container starts and this can be, for example, a script that starts a web server.
The Docker command line allows advanced operations on containers
Using the Docker interface, we can perform operations such as building a container or launching it. We can log in to other Docker providers and push the built container to them. We can version our containers so that we can revert to an older version of the container at a critical moment.
docker login
docker build -t [username/]<image-name>[:tag] <dockerfile-path>
docker push [registry/][username/]<image-name>[:tag]
The whole solution allows us to build software in a modern way and quickly exchange best patterns. Most open-source providers have ready optimized versions of their software in the form of Dockerfiles, so we can quickly check them out in an isolated and independent way from our software. It's important to remember that docker containers are independent of each other and have a file system separate from each other. If we do not allow it, they do not share any files with each other. This avoids version conflicts and allows us to focus on developing quality software.
Our offer
Web development
Find out moreMobile development
Find out moreE-commerce
Find out moreUX/UI Design
Find out moreOutsourcing
Find out moreRelated articles
The Best CMS Platforms to Build and Manage A Blog
26 Mar 2024
In the world of blogging, content management systems (CMS) are critical. The right CMS can help amplify your voice, reach a broader audience, and ease website maintenance. In this article, we'll take you through the superior CMS platforms you need to build and manage a compelling blog.
An Overview of E-commerce Platforms: Which is the Best Fit for Your Business?
23 Mar 2024
E-commerce is a transformative sphere of business, especially in the digital age. This surges the importance of choosing the right e-commerce platform for your business. It's a critical decision that decides the success in the online market. This article aims to throw light on different e-commerce platforms, their strengths, weaknesses helping businesses to choose the most suitable one.
Intelligent Assistance: The Future of Human-Computer Interaction
21 Mar 2024
In the age of rapid digital transformation, Intelligent Assistance is charting a new course for human-computer interaction. From voice commands, predictive analytics to personalized recommendations, it's an emerging paradigm that's transforming our interaction with digital devices, making technology more intuitive and user-friendly. Through this exploration, we'll dive deep into its evolution and potential.
VSEO: How to Optimize Your Videos for Search Engines
21 Mar 2024
As content consumption braves new frontiers, Video Search Engine Optimization (VSEO) emerges as an essential realm for marketers and SEO specialists alike. Our comprehensive guide aims to illuminate the intricate process of optimizing video content for search engines, catering to both novices and seasoned experts.
The Role of AI and Machine Learning in Enhancing Mobile App Experiences
19 Mar 2024
In this era of unprecedented digital growth, app developers continuously strive to improve the user experience. A game-changer in this context is the ingenious integration of AI and Machine Learning. This article explores how AI and ML are revolutionizing the Mobile App User Experience and transforming interactions like never before.
Infinite Scroll vs Pagination: Which One Wins in Website Design?
19 Mar 2024
Infinite Scroll and Pagination are time-tested strategies for handling large volumes of data on websites. While infinite scroll allows continuous data feed, pagination breaks it up into separate pages. Each has its own strengths and trade-offs. In this article, we delve into these two strategies, compare their merits and limitations, and attempt to crown a champion in the context of website design.
Key elements of a successful mobile app: What is it that keeps users coming back?
18 Mar 2024
In the fast-paced digital age, user engagement proves paramount for app sustainability. This piece delves into the crucial elements of crafting engaging mobile applications, unveiling the secrets behind enduring success in this highly competitive sphere. We explore interface design, user experience, performance optimization and more.
Show all articles