The image shows the topology requited to build a CI/CD pipeline by using Oracle Cloud Infrastructure DevOps and OCI Instances. It comprises four components:

• The Internet, containing an administrator.
• An generic third-party cloud.
• Oracle Cloud, containing an OCI compartment, a Data Safe Service VCN, and a virtual cloud network (VCN).
  • The OCI compartment contains an Auditing Service, database targets, and on-premises connectors.
  • The Data Safe Service VCN contains a Data Safe instance.
  • The VCN comprises two subnets, one containing a Linux VM, the other a database running on a compute instance.
• An on-premises implementation that contains customer-provided equipment (CPE), a VM, and the on-premises databases.

Traffic flows from the OCI compartment to the Data Safe Service VCN. Its then passed through either a dynamic routing gateway (DRG) or, via a TLS tunnel, to the Oracle Cloud VCN and also, via the DRG, to the on-premises CPE. Traffic directed to the VCN moves through the Linux VM, over TLS/TCP to the database running on a compute instance. Traffic directed to the CPE is processed in the VM and passed on to the on-premises databases.