The image shows an Oracle Cloud Infrastructure region which comprises of one Availability Domain with three Fault Domains, Fault Domain 1, Fault Domain 2, and Fault Domain 3. These Fault Domains are within a virtual cloud network (VCN), which extends into the region. The VCN contains one public/private, and two private subnets. Access to each subnet is managed by a routing table and a security list.

The public/private subnet contains Siebel Cloud manager in Fault Domain 1, an OCI load balancer in Fault Domain 2 , and a Gitlab instance in Fault Domain 3.

The first private subnet contains an OCI Kubernetes Engine cluster comprising three Kubernetes nodes, one in each Fault Domain.

The node in Fault Domain 1 contains Siebel Application Interface 1, Siebel Cloud Gateway 1, and Siebel Application Server 1, each containing a server and a pod.
The node in Fault Domain 2 contains Siebel Cloud Gateway 2, and Siebel Application Server 2, each containing a server and a pod.
The node in Fault Domain 3 contains Siebel Cloud Gateway 3, and Siebel Application Server 2, each containing a server and a pod.

The third private subnet contains a Primary Siebel Database in Fault Domain 1 and a Standby Siebel Database in Fault Domain 2. They are synchronized by Data Guard. It also contains a File System in Fault Domain 3.