Multi-Cloud is a cloud computing strategy where an organization uses services from more than one public cloud provider, such as:
- Amazon Web Services (AWS)
- Microsoft Azure
- Google Cloud Platform (GCP)
Each provider is used for different workloads based on cost, performance, features, or reliability.
Multi-Cloud architecture means:
- Applications and data are distributed across multiple cloud platforms
- No dependency on a single vendor (no vendor lock-in)
- Workloads are optimized per cloud provider strengths
- Centralized security and monitoring
Organization creates:
- AWS account
- Azure subscription
- GCP project
- Each cloud has its own virtual network (VPC/VNet)
- Secure VPN connections between clouds
- Central firewall and monitoring
- Web servers on AWS
- Databases on Azure
- AI services on GCP
¶ Step 4: Secure Access and Identity
- Central identity provider (Azure AD / IAM)
- Role-based access control
- Encrypted connections
- Use tools like Prometheus, Grafana, Datadog
- Monitor all cloud workloads from one dashboard
¶ Step 6: Disaster Recovery and Backup
- Replicate data between clouds
- Failover to another cloud if one fails
- Avoid vendor lock-in
- Higher availability
- Better performance optimization
- Cost flexibility
- Strong disaster recovery
A SaaS company wants high availability and best-in-class services from different providers.
- Deploy website on AWS EC2
- Use AWS Load Balancer
- Store static files in S3
- Deploy Azure SQL Database
- Enable automatic backups and geo-replication
- Use Google AI APIs for analytics and recommendations
- Create VPN between AWS and Azure
- Secure API connection to GCP services
- Web app on AWS connects to Azure SQL Database
- Analytics data sent to GCP AI platform
- If AWS fails, spin up backup web server on Azure
- Database remains available on Azure
Multi-Cloud strategy enables organizations to:
- Use the best services from each provider
- Improve reliability and uptime
- Optimize cost and performance
- Reduce dependency on a single cloud vendor
It is ideal for modern, resilient, and scalable applications.