Oracle Cloud Infrastructure (OCI) is a public cloud service provided by Oracle that enables users to utilize hardware, networks, disks and storage. The service can be used on Windows and Linux operating systems, web servers, RDBMS, and other middleware, groupware, server applications, and application runtime environments such as .Net framework on demand over a network.

With OCI, users can easily create, deploy, and manage server applications over the Internet in Oracle-managed data centers around the world. You can use only the required amount of computing resources, such as memory and disk without having your own servers or infrastructure. Pricing is grouped by resource and usage is based on hourly pay-as-you-go.

OCI provides a web browser-based OCI Cloud console (the management portal site) that allows users to operate intuitively.



The configuration described below uses LifeKeeper for Windows to build an active/standby cluster.


VM Configuration (Cluster Nodes)

Active System (SIOS20-NODE1) Standby System (SIOS20-NODE2)
Virtual Machine Size VM.Standard.E4.Flex (*1)
Data Disk 50 GB (for application use) (*1)
Private IP Address
[VIP Protected by IP Resource]
[VIP Configured by NLB] (*2)
Ports Forwarded by NLB
(i.e. ports on which application listens)
(if using Oracle) 1521
(if using PostgreSQL) 5432
NLB Load Balancing (if using Oracle)
(if using PostgreSQL)
(if using Oracle)
(if using PostgreSQL)
Software Windows Server 2022 Standard Edition
LifeKeeper for Windows v8.9.1
Oracle Database 19c for Microsoft Windows x64 (64-bit)
PostgreSQL 14.7

*1: Ensure that your instance size and virtual machine disks meet the installation requirements for applications (Oracle, PostgreSQL, etc.) you want to protect.
*2: Cannot be customized: assigned automatically when NLB is created. Use in this document because it was generated when creating this guide.


VM Configuration (Client)

Virtual Machine Size VM.Standard.E4.Flex
Private IP Address
Software Windows Server 2022 Standard Edition
Oracle Database 19c Client (19.3) for Microsoft Windows x64 (64-bit)
PostgreSQL 14.7


Network Configuration

OCI is used to create a virtual cloud network (VCN) to enable communication between virtual machines (VMs). VCN enables communication between VMs within this subnet by specifying a subnet.

When configuring a network for VMs in OCI, it is common to create a VCN and subnet beforehand and specify these for the VM. With VCT you can provide a virtual private network (VPN) to your VMs. VCN can be used to control network topologies, including DNS and IP address range configurations, through OCI Cloud console (the management portal site) etc.


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