What Is ServiceStage?

ServiceStage is an application management and O&M platform that lets you deploy, roll out, monitor, and maintain applications all in one place. Java, Go, PHP, Node.js, Python, Docker, and Tomcat are supported. Web applications, microservice applications such as Apache ServiceComb, Spring Cloud, Dubbo, and service mesh, and common applications make it easier to migrate enterprise applications to the cloud.

ServiceStage provides the following capabilities:

Application management: supports application lifecycle management and environment management.
Microservice application access: supports Java Chassis, Go Chassis, Spring Cloud and Dubbo microservice frameworks and ServiceComb Mesher; works with the microservice engine to implement service registry and discovery, configuration management, and service governance.
AOM: supports application O&M through logs, monitoring, and alarms.

Application Development

The microservice engine of ServiceStage supports access and governance of mainstream microservice frameworks. You can select a suitable microservice technology to quickly develop cloud applications to achieve complex and ever-changing service requirements.

Supports the native ServiceComb microservice framework.
Microservices developed by using the ServiceComb framework can be seamlessly connected to microservice engines.

Compatible with mainstream microservice open-source frameworks.
Provides a simple access mode for microservices developed by using Spring Cloud and Dubbo. You only need to modify the dependencies and configurations to access microservice engines and use the unified governance policies.

Application Management

After an application is developed, it can be hosted on ServiceStage, which provides you with complete application lifecycle management:

Application creation by using the source code, software packages (JAR, WAR, or ZIP), and container images, achieving application deployment.
Entire process management from application creation to logout, covering application creation, deployment, start, upgrade, rollback, scaling, stop, and deletion.
Multi-dimensional metrics monitoring for application components, helping you understand the running status of online applications.
GUI-based log query and search, help you quickly locate faults.

Microservice Governance

After an application developed using the microservice framework is managed on ServiceStage, the microservice will be registered with the service center after the application instance starts. You can govern microservices. The supported service governance policies are described in Table 1.

**Table 1** Service governance policies
Name	Description
Load Balancing	When the access traffic and traffic volume are large and one server cannot be loaded, you can configure load balancing to distribute traffic to multiple servers for load balancing. This reduces latency and prevents server overload.
Rate Limiting	When the number of requests sent per second by the rate limiting object to the current service instance exceeds the specified value, the current service instance no longer accepts requests from the rate limiting object.
Fault Tolerance	Fault tolerance is a processing policy when an exception occurs in a service instance. After an exception occurs, the system retries or accesses a new service instance based on the defined policy.
Service Degradation	Service degradation is a special form of fault tolerance. When the service throughput is large and resources are insufficient, you can use service degradation to disable some services that are not important and have poor performance to avoid occupying resources and ensure that the main services are normal.
Circuit Breaker	If the service is overloaded due to certain reasons, you can use circuit breaker to protect the system from being faulty.
Fault Injection	Fault injection is used to test the fault tolerance capability of microservices. This helps the user ensure whether the system can run properly when latency or fault occurs.
Black and white list	Blacklist and whitelist allow you to set the information that is associated with routes.