Description of the Illustration psft_multi_ad_withCallouts.png

This image is an architectural diagram of the deployment of a PeopleSoft application across two availability domains while ensuring high availability.

The architecture consists of a virtual cloud network (VCN) within an Oracle Cloud Infrastructure region. The region is connected to the Internet, the customer's existing network, and a web client. Within the VCN, there are two virtually identical availability domains. The VCN is linked to the region via a NAT gateway, an Internet gateway, and a dynamic routing gateway, which ensures the connectivity of the availability domains. Each availability domain contains a bastion and load balancer. The application tier within each availability domain contains servers for the Web and for ElasticSeach. The tiers also contain subnets comprising process scheduler servers and application servers. Each availability domain also contains a PeopleTools server and a database tier, which communicates with Oracle Cloud Infrastructure object storage through a service gateway. The database tier for Availability Domain 2 is disabled in this illustration.

There are five numbered callouts on the illustration:
  1. Active-Active Components across ADs
  2. Regional Subnets across ADs
  3. Load Balancing across ADs
  4. Storage Synchronization across AD
  5. Database DR across ADs
Each callout is described in the surrounding text.

The bastion host receives requests through the dynamic routing gateway (DRG) and internet gateway. The DRG is the gateway that connects your on-premises network to your cloud network. To enable communication between the DRG and the customer-premises equipment, use IPSec VPN or Oracle Cloud Infrastructure FastConnect. To access your bastion host from the internet, set up an internet gateway (IGW). An IGW is a software-defined router that provides a path for network traffic from your VCN to the internet.

The load balancer instances receive requests over port 8000 or 8443, and then send it to the web servers in the application tier in Availability Domain 1 or 2. The application tier consists of two web server instances in subnet, ElasticSearch servers in another subnet, two application servers and two process scheduler servers in a third subnet. To ensure high availability, redundant instances are deployed in the application tier and all instances are active. The web servers receive application requests from the web environment, the internet and the intranet, through the load balancer. It forwards the requests to the application server. The application servers submit the SQL to database servers in Availability Domain 1 over port 1521. The ElasticSearch servers interacts with PeopleSoft web servers and process scheduler servers. PeopleTools client is placed in a separate subnet and it interacts with the PeopleSoft database over port 1521.