Cloud Native Microservices Tutorial | A Comprehensive Guide

Introduction:

The Cloud-Native applications are a group of independent, small, loosely-coupled services. Cloud-native applications are created for delivering well-identified business value, as an ability to incorporate the response of users for extended improvements.

Cloud-native applications improvement is a way for speeding-up how applications users wish at the pace an enterprise needs.

Cloud meaning in Cloud-native Applications

• If an application is Cloud-native, particularly, it’s created for facilitating automated management and consistent development experience across hybrid, public, and private clouds.
• Organizations use cloud computing for increasing the availability and scalability of applications.
• These aspects are finished through on-demand and self-service provisioning of various resources.
• It is automating the lifecycle of an application to production from development.
• It takes a fresh approach to application development to fully leverage these features.
• The development of Cloud-native applications is an approach for rapidly updating and building applications while reducing risk and improving quality.
• It is a way to run and build fault-tolerant, scalable, and responsive applications anywhere inside the hybrid, public, and private clouds.

Twelve-factor methodology: why use it?

These rules are created for building portable, scalable, and resilient applications that thrive in cloud environments, particularly Software as a Service (SaaS) applications.

The twelve-factor methodology can be applied to applications written in any programming language and can be used to any combination of backing services, such as databases, queues, memory caches, and so on.

The twelve factors are:

1. 1. Codebase: Every microservice should have a separate repository so that it can evolve on its own.
2. 2. Dependencies: Every microservice has its own dependencies declared. The application does not include libraries in its packaging.
3. 3. Configuration: Save configuration in the environment and externalize your configuration.
4. 4. Backing services: Treat backing services, like MySQL, Amazon S3, and Twitter, as attached resources.
5. 5. Build, release, run: Must separate build and run stages.
6. 6. Processes: Treat processes as RESTful APIs. They should be stateless and share nothing so that they can scale up and down simply without losing data.
7. 7. Port binding: Export services used port binding. The ports should never be hard-coded and always be configurable.
8. 8. Concurrency: Applications use processes independently from each other to permit for load balancing.
9. 9. Disposability: Maximize robustness with fast startup and grateful shutdown.
10. 10. Development and production parity: Maintain development, staging, and production as similar as possible.
11. 11. Logs: Treat logs as event streams.
12. 12. Admin processes: Run administrative and management tasks as one-off processes and package them alongside with the application.

Benefits of Cloud-native applications

The few benefits of using cloud-native applications:

• Faster deployment shows responsiveness and agility, which are necessary to remain connected in today’s changing business world rapidly.
• If I need to explain faster deployment, I need to explain DevOps because it provides collaboration and finds the way for fast delivery.
• The Cloud-native applications are often the outcome of successful DevOps as operations, development.
• Testing groups can efficiently and simply coordinate for each release, even within geographically distinct places.

• It is needed to build a business model, i.e., customer-centric.
• Constant incremental developments are critical to the applications for improving customer satisfaction.
• These iterations and changes can be easily carried out.
• So, it provides us a competitive edge needed to be customer-friendly and more engaging.

• Different cloud automation comes with advanced and comprehensive ecosystems that create framework management easily.
• Constantly, the cloud is evolving to contain even the difficult application over its own.

• The cloud offers Containerization.
• The containerization process is supported by Container-orchestration open-source systems such as Kubernetes.
• Kubernetes currently is an industry-standard to maintain resources on any cloud.Containerization allows us to build Cloud-native abilities like compute time (pay-per-use) and server-less in milliseconds.
• It will provide pricing flexibility for developing and deploying apps.

• It can use the architecture of micro-services which can isolate and identify the failure impact to minimize the downtime using Cloud-native applications.
• With Containerization and microservices, applications can be made to become self-heal and fault-tolerant.
• Also, it increases customer-experience as the customers can like a more reliable achievement.

Cloud-Native Applications key attributes

• These applications are the group of private and dependent services that can be bound as light-weight containers.
• It may scale-in and scale-out quickly unlike the virtual machines.
• The utilization of infrastructure is optimized as the scaling unit shifts towards containers.

• All cloud-native application services improved using the framework and language best suited to the implementation.
• Cloud-native services can apply the language variety, frameworks, and runtime because the cloud-native application is polyglot.
• The fine-grained method for improving micro-services provides them to select the best framework and language for a specific task.

• Different services that reside inside the same application identify each other from the runtime of an application.
• Application architecture and elastic infrastructure, if integrated properly, may be scaled-out with more performance and efficiency.

• These applications do not have any closeness for a single machine or a specific operating system.
• They implement at a larger level of abstraction.
• Only, the exception is if any micro-service needs certain abilities, including GPUs (Graphics Processing Units) and SSDs (Solid-State Drives) that can be facilitated by the machine’s sunset exclusively.

• Cloud-native applications deployed on elastic, shared, and virtual infrastructure.
• It can be aligned using underlying infrastructure for shrinking and developing dynamically.

• Durable and persistent services follow a distinct format that ensures more resiliency and availability.
• Stateless services are independent of the stateful services.
• Persistence can be explained as an aspect that should be displayed inside the context increasingly with statelessness, state, and micro-storage environments.

Microservices

Cloud-native systems embrace microservices, a famous architectural style for constructing modern applications.

• Each implements a particular business capability within a high domain context.
• Each is developed privately and can be deployed independently.
• Each one is independent and has its own data storage technologies and dependencies.
• Each runs in its own process and communicates with others using standard communication protocols HTTP/HTTPS, gRPC, WebSockets, or AMQP.

They compose together to create an application.

Microservice challenges:

While distributed cloud-native microservices can offers immense agility and speed, they present more challenges:

Resiliency

• A microservices architecture moves the system from in-process to out-of-process network communication.

Distributed Data

• By design, every microservice encapsulates its own data, exposing operations by its public interface.
• If so, how do you query data or implement a transaction across multiple services?

Microservices pros and cons:

Cloud-native microservices offer several benefits, including:

• Applications that run as a set of distributed microservices are highly flexible because developers can update and scale every microservice independently.

• Microservices usually break codebases into little parts that are simpler for developers to work with. Microservice pose some challenges.
• The biggest is that they increase application difficulty.
• An application with high moving parts is more complex to orchestrate.
• For this reason, it’s not worth implementing microservices for relatively simpler applications.
• These include applications with small codebases, and those with small scalability or resiliency demands.

Migration Strategies for Microservices

When it comes to migration strategies for microservices, few approaches that are available. The usage of an approach varies based on the conditions and the team within the organization to take the appropriate decision.

• Parallel redesign
• Standard microservices
• Self-contained systems.