What is Docker and Why Is It So Popular?
The biggest advantage of Docker containers is the amount of cost-saving it offers. The return on investment when using Docker is very lucrative and it helps developers drive down costs while also improving profits. Docker is more lucrative for larger companies that want to generate solid revenue over a long period of time.
Docker facilitates long-term savings by reducing the amount of infrastructure and resources needed for development. The biggest difference in investment is visible when it comes to server costs. Using such efficient applications also requires fewer engineers to develop and manage them as well, which leads to lower human resource costs.
Docker containers ensure multiple development and release cycles are handled consistently under a single unified platform. Having a standardized environment allows production to be as efficient as possible.
A standardized service infrastructure across an organization allows team members to work in an environment where developers are on par with each other. All engineers are automatically equipped to fix bugs and analyze the performance of their applications. It drastically reduces the amount of time that is wasted on bug fixing and improving features and allows more time to be invested in feature development.
Docker makes version changes very easy through its modular infrastructure. If an upgrade to a component causes issues with your application, you can simply roll back an upgrade for the problematic component. Docker lets users roll back to a previous image of a component and also allows developers to replicate images for testing purposes. Launching saved Docker images are on par with running machine processes and performance is never a concern.
Even if multiple users run an app on different systems and settings, apps developed using Docker run the same on all servers. Developers save a lot of time they would otherwise be spending on creating new environments and debugging issues specific to a particular environment. The codebase is easy to set up and is far more portable than any other platform.
Production infrastructure also becomes easier to maintain and far more reliable than using traditional development frameworks. The same container image can be used across all stages of app development. Developers can run these images separately without any dependency and speed up the development process.
Deployments in Docker take only a few seconds. With the platform creating containers for each individual process, it allows developers to save on boot time. Docker apps also do not boot into an OS and simply make use of the OS kernel instead. The apps can also write, erase, and rewrite data without losing efficiency.
Docker enables developers to test their apps in consistent environments right from the early development stages until the end of production. All Docker containers can be pre-configured to account for all possible dependencies and configurations. Developers can make use of the same containers until the production stages without needing any manual intervention.
If developers want to upgrade an app during the release cycle, changes can be made directly to the Docker containers. Even in the release cycle, developers can test new features and implement changes by simply modifying existing containers instead of building from scratch. The flexibility that Docker offers is what makes the platform so flexible.
Developers can test and release images across a number of servers at the same time. Security patches can be deployed in a similar fashion. All developers need to do is apply the required patches, test for issues and release it to the production stage by modifying containers.
Other than the sheer amount of scalability and flexibility Docker brings to the table, its security is an important backbone. Docker automatically ensures that any app running within containers are fully segregated from each other.
Developers have complete control over how traffic is managed by the apps. One Docker container cannot access or process data of another container by default. Containers have access to individual resources that they can make use of including network stacks and dependencies.
Docker isolates and segregates your apps and its resources. The platform ensures that each container has access to all the resources that it needs. Developers can implement multiple containers for separate apps and run them as individual stacks. You can also delete apps by removing its container and there will be no temporary files of configuration settings left behind in the OS. Most importantly, Docker apps only make use of the resources that have been allotted to them instead of getting complete access. This fully isolates the apps and offers unmatched security.
One of the primary advantages of docker is its portability. Enterprises over the years have been shifting towards cloud-based computing. Most popular cloud platforms like AWS and GCP have already adopted Docker’s extensive support. Developers can run containers within cloud-based platforms. Cloud-based environments also allow apps to be moved from one cloud service to another with ease.
Microsoft, Google, Amazon, and other tech giants have moved on to cloud-based infrastructure and all of them support Docker’s container system with just as much stability and consistency as end-user desktops.
Containers start and stop faster than any virtual machine can. They are also portable and are used in stable host environments. Moreover, it is much easier to scale containerized apps as code changes can be made very efficiently. Developers preferred using containers as it is very easy to break down complex apps into smaller modules and work on them.
Docker’s success is driven by its impeccable launch timing that allowed the industry to resolve its software deployment and delivery problems at once. The five years before Docker’s launch, developers were brainstorming ideas to address these issues but were unsuccessful at doing so. Older container frameworks did offer similar solutions but failed to grab the attention of developers as the industry was not concerned about flexibility and scalability as much in the 2000s.
Just like how Linux’s success was driven by its competition being in disarray, Docker achieved similar success by offering an innovative approach to development. A decentralized development strategy was welcomed by the industry with open arms and it led to Docker being the undisputed champion for container-based development.