Docker is a software framework that allows users to build, run, and manage containers on servers and the cloud. It enables developers to package programs into containers, which are standardized executable components that combine application source code with the OS libraries and dependencies needed to run that code in any environment. Continue reading to learn more about them.
What is Docker Hub?
Docker Hub is the world’s largest repository of container images, featuring content from various sources such as container community developers, open-source projects, and independent software vendors (ISVs) who build and distribute their code in containers. Users can choose between using free public repositories for storing and sharing images or paying for private repositories.
A Docker container image is a small, standalone software package that contains everything needed to run a program, including code, runtime, system tools, system libraries, and settings. By leveraging Docker’s methodologies for fast shipping, testing, and deploying code, you may substantially reduce the time between writing code and having it run in production. Furthermore, its services, such as Docker Hub and Docker Registry, make Docker use more convenient.
Docker Hub Features
Key features provided by Docker Hub include:
- Container images can be stored and distributed using Repositories, which you can share with your team or the Docker community at large. Each repository can hold a large number of annotated and structured images.
- Teams and Organizations—you may create an organization entity in Docker Hub and one or more teams inside it that contain Docker Hub users, providing you control over access to your private repositories or specific images.
- Official Docker Images are curated with basic operating system images, programming language runtimes, and open-source data storage. Official Docker Images are reviewed and published by the Docker Library Project. They adhere to Docker file best practices, provide thorough documentation, and update regularly.
- Software developers can use the Docker Verified Publisher Program to create official Docker Hub repositories for validating container images. In addition, the Verified Publisher mark shows that the repository was created and signed by a reputable software vendor, minimizing the danger of obtaining fake or susceptible images.
- The Automated Builds feature in Docker Hub allows you to create images from source code saved in a remote repository. For example, you can define branches and tags in a Git repository to specify which code should be built into a Docker image, and a web hook will initiate a new build on Docker Hub when you push code.
- Web hooks allow you to perform an action in another service when an image is pushed to a Docker Hub repository. This may, for example, cause all new images to be subjected to software checks.
Why Trust and Use Docker Hub?
There are some notable advantages of using Docker Hub, including:
Docker Hub gives consumers access to a variety of trusted images that have been vetted for security and quality. These are a few examples:
- Verified Publisher images—Docker verifies the program vendor.
- Docker Certified images-These images are verified and checked against best practices and known vulnerabilities by Docker.
- Official images—curated by Docker to assist developers in laying a solid foundation for their project using a set of fundamental basic images and best – practices.
Each image conveys a distinct trust level. You can use these trust levels to help you choose which images to download and which images to publish on Docker Hub.
The free tier of Docker Hub gives you access to some of the most valuable features of container repositories, including:
- Unlimited public repositories
- One private repository with three collaborators at a maximum.
Within the free tier, you can use essential testing tools to familiarise yourself with Docker Hub’s operations and user experience. However, the amount of pushes and pulls allowed per six hours is limited under the terms of service for free tier customers. As a result, the free tier is inadequate for most modern development and DevOps workflows due to this constraint.
Cybersecurity threats are constantly evolving, making it hard to anticipate the future. However, Local image vulnerability scans are available to all Docker Hub accounts. On the other hand, only team accounts have access to audit logs and must employ multifactor authentication (MFA) to protect their repositories.
Bitbucket and GitHub integrations and automated tests and build triggers are all supported by Docker Hub. It also allows you to automate development pipelines and use webhooks to employ continuous integration/continuous delivery (CI/CD) pipelines.
Despite the benefits listed above, Docker Hub is not appropriate for all scenarios that many development teams find beneficial or necessary, such as:
- Images are stored on-premises to reduce latency or to maintain data sovereignty.
- Images are cached locally to save latency and bandwidth usage.
Containers are the most efficient approach to creating applications that can be scaled and adjusted quickly to bring new features and solve customer issues, allowing you to achieve a competitive advantage. Unlike the uncertain future of Cryptocurrencies, Docker Hub has an extensive customer base and is widely used across the world. With Docker Hub, you have an excellent resource to help you source useful base images to build from and a variety of tools to streamline your collaboration, testing, and CI/CD processes.