Microservices-based applications are a modern trend in app development. They are self-contained application units that fulfill one specific function. One can say they are small applications on there. You can create several of them for an application. The problem comes in managing them, especially if you’re using different technology stacks. And when different environments come into play, it is all in chaos. The solution to this problem is using containers to encapsulate each of the microservices. Docker helps you manage these containers.

Simply put, Docker is a containerization technology. It provides developers with a simple way of handling containerized microservices, giving them a way to wrap up an application. It ensures that it deals with app deployment and runtime issues outside the single application, maintaining consistency across all the containerized microservices. These issues include how to expose it on a network, managing its use of memory and storage, and controlling access permissions. Here are some of the advantages that Docker gives you:

1. Standardization and Productivity

They ensure consistency through the multiple cycles of release and developments. It gives you a standardized environment for developing, building, testing, and producing your applications. The standardization infrastructure runs across the pipeline allowing all team members to work in a productive – parity environment. Software engineers can efficiently analyze and fix any issues that arise within the application. They, therefore, do not waste time on defects and have more time to focus on feature development. They also enable you to commit changes to Docker images and version control. If you perform an upgrade on a component that results in your whole environment breaking, it is easy to roll back a previous version. It is fast in that you can quickly replicate your application and achieve redundancy.

2. Compatibility and Maintainability

Parity is one of the things your team will appreciate with Docker. Your images will run the same no matter what computer or server your team is using. It means your team will spend a small amount of time in setting up the environment or trying to debug environment-specific issues. Moreover, it provides a portable and easy-to-set-up codebase for your team. It ensures that your infrastructure for production is reliable and easy to maintain.

3. Continuous Deployment and Testing

Docker assures you of a consistent environment for the entire development of the production process. They come configured to maintain all the configurations and dependencies internally. Using the same container for the development process to the production ensures that there is no manual intervention, which may result in errors or discrepancies. If the app needs any upgrades in the course of a product’s release cycle, you can easily make amendments to Docker containers, test, and implement them to your existing ones. The flexibility they offer is another great benefit. Even during the release of a security patch, the process is the same. Apply, test, and release to production.

4. Isolation

With Docker, your resources and applications are segregated and isolated. It makes sure that each container has its own resources isolated from all the others. You can have a setup whereby the different containers for different applications run on different stacks. The application removal process is quite clean since each of them run on their containers. Simply delete the specific container, and you are sure no temporary or configuration files remain on your host operating system. Besides, Docker ensures that the applications only use the resources allocated to them. One application will not use up all your resources, leading to downtime and underperformance of the other apps.

5. Return on Investment

Most management decisions revolve around the return on investments and cost savings. It is especially true when developing and launching a new product. A solution that maximizes profits at the same time save on costs garners a lot of support from management since they generate steady revenue in the long term. Docker helps facilitate savings by significantly reducing resources on infrastructure. With it, you need fewer resources in running the same application. It gives you an organization solution that saves on everything, from server costs to the labor required in maintenance. It allows the developer teams to be lean and efficient.

6. Simplicity and faster configurations

Docker simplifies matters in that, users can use their settings by putting it into code and deploy without any issues. Since one can use it in various environments, it does not link the infrastructure requirements to the application’s environment. 

7. Multi-cloud platforms

Portability is one of the greatest advantages that come with Docker. Major computing platforms such as Amazon Web Services (AWS) and Google Compute Platform (GCP) incorporate Docker’s added individual support. One can run Docker containers in Amazon EC2 instance, Rackspace server, Google Compute Engine stance, and even VirtualBox, as long as the host OS supports Docker. Moreover, containers running on the different environments are easily portable, achieving the same consistency and functionality. It also works well with other providers such as OpenStack and one can use it with various configuration managers like Ansible.

8. Security

One of the significant concerns with anything technology is security. Malicious individuals are often up to date with the latest technology; therefore, it always a point of interest. Docker segregates that the containers entirely, granting you total control over traffic and management. None of the containers can peer into the processes of another container. As highlighted before, each of the containers gets its own set of resources; therefore, if one of them is compromised, it will not affect the running of the others in any way.

Microservices and containers are the modern way of building large and manageable applications. Not containerizing the results in a lot of challenges during deployment, and that is why Docker is so essential. Some of the reputable companies that use Docker services in their management include ADP, Spotify, ING, just to mention but a few. Docker containers share the operating system. Therefore, they run smoothly regardless of whichever OS is hosting them. The success of Docker is mainly attributable to the portability, flexibility, and simplicity it has to offer.