The image shows a hybrid disaster recovery topology with an on-premises environment and a DR site on an OCI Region. A DNS
for local name resolution sends data to the cloud and through port 443 (HTTPS) to the on-premises load balancer and dotted
line to an Internet Gateway on OCI.
The on-premises environment is as follows:
- Data flows from the Load Balancer (10.10.10.10) to WebHost1 (10.10.10.11) and WebHost2 (10.10.10.12).
- Two-way data flow between the WebHosts and WebLogic (which contains AppHost1 (10.10.10.13) and AppHost2 (10.10.10.14).
- Two-way data flow between WebLogic and NFS Storage.
- Two-way data flow between WebLogic and Oracle RAC. Oracle RAC has DBHost1 (10.10.10.15), DBHost2 (10.10.10.16), and PDB1.
The OCI Region has VCN with an Internet Gateway, Service Gateway, NAT Gateway, and DRG. The following subnets are configured
for the secondary environment:
- Bastion Subnet (Bastion tier) that has a Bastion Host (100.70.0.10) with SSH to on-premises and SSH to OCI.
- Public or Private Subnet 1 (web-tier) with a Load Balancer (100.100.100.10) that serves Ports 7001 (Admin Server) and 443
(HTTPS). The web-tier also has WebHost1 (100.70.10.11) and WebHost2 (100.70.10.12).
- Private Subnet 2 (mid-tier) with AppHost1 (100.70.20.11), AppHost2 (100.70.20.12), Block Volume 1 and Block Volume 2.
- Private Subnet 3 (FSS-tier) with OCI FSS: products1, products2, shared config, and shared runtime.
- Private Subnet 4 (db-tier) with a DB System (RAC) that has DBHost1 (100.80.10.15), DBHost2 (100.80.10.16), and PDB1.
Data flows as follows in OCI:
- Two-way data flows between the mid-tier and the FSS-tier.
- Data flows from the web-tier through ports 7001 (Admin Server), 8001 (WLS Cluster 1), and 9001 (WLS Cluster 2) to the mid-tier.
- Data flows from the mid-tier through ports 1521 (SQL *NET) and 6299 (ONS) to the db-tier. Data also flows bi-directionally
between the mid-tier and FSS-tier.
- Data also flows bi-directionally between the PDB1 on-premises and the PDB1 in the db-tier through Data Guard Port 1521 (SQL
*NET).
- OCI Fast Connect facilitates two-way data flow between the customer's on-premises equipment (CPE) and DRG on OCI.
