System Architecture

RDS provides primary and secondary availability architectures by default, and there are two available deployment, namely, single-availability zone deployment and multiple availability zone deployment:

Single Availability Zone Deployment

Multiple Availability Zone Deployment

Architecture Analysis

• DNS: Domain Name Resolution service, used to access RDS instance through domain name in the intranet.
• DMS: Database Management service, providing a WEB management interface, convenient for simple management on cloud database instances.
• Console: JD Cloud console service, providing RDS management interface.
• Master Node and Subnode: The default master node provides external services, and the subnode exists as a disaster recovery instance. When the master node fails to provide services, the subnode can be promoted as a new master node to ensure uninterrupted user services.
• Monitoring Service: To collect RDS instance information and physical machine information.
• Account Management Service: It is responsible for the creation, deletion and authorization of the RDS instance account.
• Database Management Service: It is responsible for the creation, deletion, and authorization of the RDS instance database.
• Backup Service: Automatic scheduled backup, supporting customized backup.
• Performance Optimization Service: To collect RDS slow log information for analysis and system optimization.
• SQL Audit: It is responsible for collecting SQL execution statements for safety audit.