This image shows a multicloud architecture featuring Oracle Cloud Infrastructure (OCI), Microsoft Azure, a third-party cloud with financial systems, and the internet used by Gas South customers. The data flow through the architecture is documented in the surrounding text.

Microsoft Azure provides a self-service portal for customers, an SQL database, and Microsoft Business Intelligence.

The OCI region has 1 availability domain and 1 VCN. The region has access to Oracle Utilities Customer Cloud Service (CCS) and its generalized data export (GDE). The region provides the following services:

• Oracle Cloud Infrastructure Backup and Restore
• Oracle Cloud Infrastructure Events
• Oracle Integration Cloud Service
• Oracle Cloud Infrastructure Monitoring
• Oracle Cloud Infrastructure Object Storage
• Oracle Cloud Infrastructure Vault

The VCN provides the following gateways:

• Internet gateway: Provides communications between public subnets and internet hosts. In this architecture, it handles the communication traffic between OCI and the financial systems cloud.
• Service gateway: VCNs communicate with services such as object storage over the Oracle network fabric without traversing the internet.
• Dynamic routing gateway (DRG): Provides private connectivity between on-premises networks and VCNs by using Site-to-Site VPN or FastConnect. In this architecture, the DRG handles the communication traffic between OCI and Azure, which is connected by site-to-site VPN.

The VCN provides the following subnets:

• Load balancer public subnet: Provides load balancing for SOA integration traffic from the financial cloud and from Microsoft Business Intelligence and passes it to SOA managed servers in the SOA subnet.
• SOA private subnet: Provides Oracle SOA Cloud Service Marketplace with a managed file transfer (MFT) cluster, business activity monitoring (BAM), and SOA with service bus (SB) and business-to-business (B2B) clusters. Data from the managed servers is stored in a database in the database subnet.
• Data private subnet: Provides Oracle Cloud Infrastructure Data Integration and Oracle Cloud Infrastructure Functions instances.
• Database private subnet: Provides a Oracle Base Database Service instances for SOA data.