microservices gateway architecture

The microservice registration center is a basic component of the microservice architecture. It is used for automatic discovery and dynamic route of services. It can receive registration requests for microservice instances and store the instance information in the registration table. Through the registration center, service consumers can find and call the services they need according to the service name or other identification. The registration center can also achieve Load Balancer and fail over to ensure high service utilization. A microservice gateway is a component used in a separate or independent application in a microservice architecture. Its main function was to uniformly register and access the internal microservice component modules 'API interface capabilities to the gateway, and provide a unified interface service to the outside world. Through the gateway, the client only needs to access the exposed interface of the gateway, and there is no need to directly call the interface of each microservice. The gateway could also achieve security isolation, permission verification, monitoring, Load Balancer, and other functions to provide a better user experience and system performance. In the microservice architecture, the registrar and gateway were two independent components, each with different functions and application scenarios. The registration center was mainly used for automatic discovery and route of services, while the gateway was used for unified management and exposure of interface services. They play an important role in the microservice architecture, improving the system's flexibility, flexibility, and reliability. (Source: Doc3, Doc4, Doc7)

Consul is a service registration discovery tool launched by HashiCorp, written in Golang and open source. Consul is naturally cross-platform and easy to deploy. It has a web management background for users to view and maintain the Consul cluster. In addition to the service registration discovery function, Consul also supports Key/Value storage, which can be used as a simple configuration center. Consul's architecture supports multi-data center deployment, and each data center has multiple Consul nodes. Consul's nodes were divided into Server mode and Client mode. The Server mode nodes were cluster nodes in the true sense, and the CARs in the CAP were implemented through the RAFT algorithm. Consul also provided a health check function and a web management page. Overall, Consul was a powerful and simple microservice registrar.

The main microservice registration centers were Eureka, Consul, ZooKeeper, and Nacos.

Eureka is a microservice registration center for communication between microservices. It consists of the Eureka server and the Eureka client. The Eureka server was responsible for the registration and discovery of services, while the Eureka client was responsible for interacting with service suppliers and service consumers. When a microservice starts, it will register its service information with the Eureka server and send a heartbeat regularly to keep the contract renewed. If the Eureka server does not receive a heartbeat within a certain period of time, the service will be removed from the service list. When a service consumer needs to call a service supplier, it will obtain the service supplier's address from the Eureka server and store the address in the local buffer so that it can be directly retrieved from the local buffer the next time it is called. Eureka was easy to use, stable, and reliable, so it was widely welcomed. It is a component of the Spring Cloud framework that implements service registration and discovery functions.

One horror story could be when the communication between microservices breaks down. For example, if there is a misconfiguration in the API calls. Suddenly, data stops flowing properly between services and the whole application starts to malfunction. The end - user experience becomes terrible as parts of the app stop working.

Well, start by clearly defining the user and their goal. Then describe the actions they'll take and the expected outcome. Keep it simple and focused.

A 'gateway novel' is a novel that can lead a reader to explore more works within a genre or by an author. It might be a book with broad appeal and accessible writing style. For instance, J.K. Rowling's 'Harry Potter' series can be seen as gateway novels. They are easy to get into for a wide range of ages and reading levels. Once a reader enjoys this series, they might be more likely to explore other fantasy novels.

To write good user stories for microservices, you need to understand the microservice's functionality and the user's context. Focus on the value the user gets from the service and break it down into manageable chunks. Also, make sure the stories are testable and have acceptance criteria.

Gothic architecture was a medieval European architectural style that originated in France and was popular in Europe from the 13th to the 15th century. It was featured by tall spires, flying buttresses, and pointed arch. It expressed human reverence for God and yearning for the future. Gothic architecture was mainly used in churches, monasteries, castles, palaces and other buildings. Its basic components were pointed arch and rib vault. Gothic architecture had an important position in the history of architecture because of its superb technology and artistic achievements. Its unique features included its towering spires, the huge stained glass paintings on the windows, the dim light, and the suspended space structure. Gothic architecture had a major impact on the architectural style of later generations and provided valuable design inspiration for later architects.

The architectural features of Minnan temples were quite obvious, and they were very different from the architectural styles of other regions. They were usually built with red bricks and tiles, and they looked gorgeous and magnificent. The architectural style of Minnan temples was described as " red bricks and white stones with double slopes, with bricks and stone swallowtail ridges, carved beams and painted palaces." In addition, the layout of the temple buildings was also one of the important features of the temple buildings. According to the information provided, the basic parts of the temple buildings were divided into basic blocks and advanced blocks to show the level and style of the buildings in the temple. Ordinary seats were usually used in the Heaven King Hall, and as the courtyard went deeper, the base gradually rose. In summary, the architectural features of Minnan temples included the appearance of red bricks and tiles, and the layout of basic and advanced seats.