Cloud Application Disaster Recovery via DNS Failover
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Solution Overview
Problem
Enabling disaster recovery for cloud-based applications is a time-consuming and convoluted process that requires frequent manual intervention, especially in the event of natural or manmade disasters, leading to potential data loss and service interruptions.
Innovation Solution
A system that automates disaster recovery by replicating a cloud-based application to a secondary cloud platform, using a DNS service to redirect traffic from a primary instance to a secondary instance in case of failure, and includes testing to ensure compliance with recovery point objective (RPO) and recovery time objective (RTO) metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual disaster recovery procedures are used, then flexibility and control are maintained, but the process becomes time-consuming and complex
Solution Approach 1:
The system performs preliminary actions by automatically replicating the cloud-based application and its data to a secondary cloud platform landscape before any disaster occurs. This advance preparation ensures that when a disaster strikes, the recovery process is already substantially complete, eliminating the need for time-consuming manual setup and configuration during the actual disaster recovery event.
Solution Approach 2:
The disaster recovery system operates autonomously without requiring manual intervention. The system automatically detects failures, triggers replication processes, and manages the failover to the secondary instance. This self-service capability eliminates the time-consuming manual operations while maintaining precise control over the recovery process through automated decision-making and execution.
2Reliability
If data replication to a secondary cloud platform is implemented, then data loss is minimized, but system complexity increases
Solution Approach 1:
The system creates a complete copy of the cloud-based application and its associated data in a second cloud platform landscape. This copying approach ensures that an identical, fully functional replica exists that can immediately take over in case of disaster, minimizing data loss and service interruption while maintaining operational reliability.
Solution Approach 2:
A domain name system (DNS) service acts as an intermediary between users and the cloud-based application instances. The DNS service manages the complexity of failover by automatically redirecting traffic from the primary instance to the secondary instance when a disaster occurs, abstracting the complex replication and failover mechanisms from end users and simplifying the overall system interaction.
3Productivity
If automated failover is configured, then service interruption is reduced, but configuration complexity increases
Solution Approach 1:
The system implements automated feedback mechanisms that continuously monitor the health and availability of the primary cloud-based application instance. When failures or disruptions are detected, the system automatically triggers the failover process to the secondary instance. This feedback-driven approach ensures rapid response to disasters, minimizing service interruption and maintaining productivity without requiring complex manual intervention or configuration.
Data Source
AI summary
In one respect, there is provided a method. The method can include: determining that a second instance of the cloud-based application is deployed at a second cloud platform landscape; replicating, at a second database at the second cloud platform landscape, at least a portion of data from a first database at the first cloud platform landscape, the data from the first database being associated with the first instance of the cloud-based application; and configuring a domain name system (DNS) service to include a primary universal resource locator (URL) for the first instance of the cloud-based application and a secondary URL for the second instance of the cloud-based application, the primary URL and the secondary URL both being associated with a custom domain of the cloud-based application. Related systems and articles of manufacture are also disclosed.