I am sure you have already guessed what this blog is about but before I start, I must state that application development is not my thing. Good job I realised it quite early on when doing an undergrad university assignment of solving 4 x 4 arithmetic matrix equation, I wrote a 16 lines of code for solving that matrix instead of using a for/loop( probably 1 line code) in C language. That was embarrassing 😊. After that, I vowed to only read programming to pass my exams!
The cloud revolution has been into our lives for over a decade now. It can be said that Cloud Native is a path to innovation, established in order to take complete advantage of Cloud Computing. Cloud Native is recently one of the biggest trends in the software industry.
Before going further into cloud native, one concern that I get quite a lot from customers is Cloud based vs cloud native application development. Cloud-based development refers to application development executed by means of a browser that points to a cloud-based infrastructure, whereas, cloud-native development refers more specifically to application development grounded in containers, microservices, and dynamic orchestration. I will explain containers, microservices and orchestration in the next few lines.
So, to simplify, some definitions:-
Cloud-Native Development
Cloud-native development was designed with the goal to facilitate and utilize the cloud to its maximum potential. When we communicate with the cloud and deploy our applications, we need a service which can enable better execution. Cloud-native helps in designing, building and running applications on the cloud. It consists of continuous integration, container engines, and orchestrators.
Cloud-Based Development
A cloud platform is a compelling mixture of cloud computing, networking, storage and business utilization that promotes IT and consumer satisfaction. Microsoft has enabled the fast track of resources with its Azure platform. Google started preparing for these challenges by launching their Google Cloud Platform.
Cloud-Enabled Development
A cloud-enabled application is an application that was moved to cloud, but it was originally developed for deployment in a traditional data center. Some characteristics of the application had to be changed or customized for the cloud. When developing an application that will be deployed in the cloud, you must keep the cloud principles in mind. They should be taken into account as part of the application.
What Is Cloud Native?
Cloud Native is totally about how the applications are created and deployed, not where the applications are developed. There are tons of definition but the two that I really like ;
A) Cloud native is an approach to building and running applications that fully exploit the advantages of the cloud computing model. (extract from Pivotal)
B) According to Cloud native Foundation, Cloud native computing uses an open source software stack to be:
- Each part (applications, processes, etc) is packaged in its own container. This facilitates reproducible, transparency, and resource isolation.
- Dynamically orchestrated. Containers are actively scheduled and managed to optimize resource utilization.
- Microservices-oriented. Applications are segmented into microservices. This significantly increases the overall agility and maintainability of applications.”
Before we go any further, lets understand Containers, Orchestration and Microservices.
Container
The basic idea of containers is to package software with everything is needed to execute it into one executable package, e.g., a Java VM, an application server, and the application itself. Then, run this container in a virtualized environment and isolate the contained application from its environment.
The main benefit of this approach is that the application becomes independent of the environment and that the container is highly portable. The same container can run on development, test or production system. And if application design supports horizontal scaling, multiple instances of a container can start or stop to add or remove instances of the application based on the current user demand.
The Docker project is currently the most popular container implementation. It’s so popular that the terms Docker and container are often used interchangeably. But keep in mind that the Docker project is just one implementation of the container concept and could be replaced in the future.
Orchestration
Deploying application with all dependencies into a container is just the first step. It solves the deployment problems but in order to benefit from a cloud platform fully, it comes with new challenges.
Starting additional or shutting down running application nodes based on the current load of system isn’t that easy. It requires,
- monitoring,
- triggering the startup or shutdown of a container,
- making sure that all required configuration parameters are in place,
- balancing the load between the active application instances
- sharing authentication secrets between your containers.
Doing all of that manually requires a lot of effort and is too slow to react to unexpected changes in system load. It needs the right tools in place that automatically do all of this. This is what the different orchestration solutions are built for. A few popular ones are Docker Swarm, Kubernetes, Apache Mesos and Amazon’s ECS
Microservices
The approach utilized for developing the Cloud Native application by gathering various small independent services that run its own processes and implements their business capabilities is called microservice. All these works together and manage the overall functionality of the whole system. The development of Cloud Native applications is done as a system of Microservices. With this approach, scaling can be made highly efficient as each of them has one functionality, well-defined boundary, and API.
Why Use Cloud Native? Benefits of Cloud Native
Below mentioned are the certain benefits of using Cloud Native applications.
Competitive Advantage: Stay Ahead Of The Competition :Cloud Native application tends to offer a competitive advantage as it lets businesses build and deliver applications quickly in response to customer requirements.
Great Flexibility: Works Everywhere : Cloud Native applications aren’t just meant to work on public clouds, but applications built can run on both public as well as private clouds without any modification.
Auto Scalability, Reduce Expenditure: Cloud Native applications come with the auto-scale feature in order to let you handle continuous business requirements. With this, the enterprises deal with the pay-as-you-go model letting them pay for computing services utilized by them based on the time frame they used. Along with that, the downtime with Cloud Native applications is very less or not at all.
Auto Redundancy, Avoid Failures : With Cloud Native applications being resilient to failures, they handle the outages and enable corrective actions. The application starts processing instant moves from one data center to another without any interruption to the service in case of any failure.
Speed, Be As Fast As Flash : Quick deliverables are the aim of every company in the software industry. SME or large scale enterprise, all of them achieve this aim with the use of Cloud Native. With Cloud Native, the time utilized for the development of the application can be moved from months to days or hours. Ultimately, Cloud Native is the reason for organizations to be more responsive to the client’s requirements.
Margin, Always A Concern : With Cloud Native, highly efficient applications usually cost less. This application lets you pay for additional resources only when it is required. You do not need to pay for the resources even when you don’t have a large number of visitors.
Summary
The ideas and concepts of cloud-native computing introduced a new way to implement complex, scalable systems. Even if you’re not hosting your application on a cloud platform, these new ideas will influence how you develop applications in the future.
Containers make it a lot easier to distribute an application. You can use them during your development process to share applications between team members, or to run them in different environments. And after all tests have been executed, you can easily deploy the same container to production.
Microservices provide a new way to structure your system. They introduce new challenges, but they also shift the attention to the design of each component. That improves encapsulation and allows you to implement maintainable components that you can quickly adapt to new requirements.
And if you decide to use containers to run a system of microservices in production, you need an orchestration solution that helps you to manage the system.
Thanks for reading !