1. Administering Oracle Java Cloud Service
  2. Get Started with Oracle Java Cloud Service
  3. About Java Cloud Service Instances in Oracle Cloud Infrastructure

About Java Cloud Service Instances in Oracle Cloud Infrastructure

When you create an Oracle Java Cloud Service instance, you can choose the infrastructure that the instance must use: Oracle Cloud Infrastructure or Oracle Cloud Infrastructure Classic. The Oracle WebLogic Server environment that the instance provides in either type of infrastructure is substantially the same. A few differences exist in the supported capabilities and the instance-creation workflows.

Topics:

Workflow for Creating an Instance in Oracle Cloud Infrastructure

Task More Information
Task 1: Understand the differences between instances created in Oracle Cloud Infrastructure and in Oracle Cloud Infrastructure Classic. Knowing these differences will help you select an appropriate region while creating your Oracle Java Cloud Service instance. Differences Between Instances in Oracle Cloud Infrastructure and Oracle Cloud Infrastructure Classic
Task 2: Create the required network, object storage, and security resources in the Oracle Cloud Infrastructure region where you intend to create the Oracle Java Cloud Service instance.

Documentation: Prerequisites for Oracle Platform Services on Oracle Cloud Infrastructure

Tutorial: Tutorial icon Creating the Infrastructure Resources Required for Oracle Platform Services
Task 3: Create an Oracle Cloud database instance in the region where you created the Oracle Cloud Infrastructure resources.

This database is required to store the schema required for Oracle Java Cloud Service.

Use the appropriate documentation, depending on the Oracle Database service that you want to associate with the Oracle Java Cloud Service instance:

Oracle Database Cloud Service: Create an Oracle Database Cloud Service Database Deployment

Oracle Cloud Infrastructure Database: Managing DB Systems

Oracle Autonomous Database: Provisioning Autonomous Database in Using Oracle Autonomous Database on Shared Exadata Infrastructure
Task 4: Create the Oracle Java Cloud Service instance in the same Oracle Cloud Infrastructure region and virtual cloud network (VCN) as the Oracle Cloud database instance. Use the appropriate documentation, depending on whether you want to attach the Oracle Java Cloud Service instance to a public subnet or a private subnet:

Create an Oracle Java Cloud Service Instance Attached to a Public Subnet on Oracle Cloud Infrastructure

Create an Oracle Java Cloud Service Instance Attached to a Private Subnet on Oracle Cloud Infrastructure

Differences Between Instances in Oracle Cloud Infrastructure and Oracle Cloud Infrastructure Classic

Feature Oracle Cloud Infrastructure Oracle Cloud Infrastructure Classic
Availability domains Each region has multiple isolated availability domains, with separate power and cooling. The availability domains within a region are interconnected using a low-latency network. When creating an instance, you can select the availability domain that the instance should be placed in. Not applicable
Compute shapes VM.Standard and BM.Standard shapes

Note: The shapes available might vary by region.

Standard and high memory shapes

Note: The shapes available might vary by region.

Database options for the infrastructure schema
  • Oracle Autonomous Database
  • Oracle Cloud Infrastructure Database
  • Oracle Database Cloud Service
  • Oracle Database Cloud Service
  • Oracle Database Exadata Cloud Service
Associating an instance with a RAC database for high availability Use Oracle Cloud Infrastructure Database Use Oracle Database Cloud Service
Networking You must attach each instance to a subnet, in a virtual cloud network created in Oracle Cloud Infrastructure. If you specify a private subnet, the nodes of the instance can't be assigned public IP addresses. You can attach instances to IP networks defined in Oracle Cloud Infrastructure Compute Classic. For such instances, you can choose to not assign public IP addresses.
Public IP addresses You can’t reserve and assign public IP addresses. The addresses are auto-assigned when the service instance is created, but won’t change when you restart the nodes or the instance. You can reserve public IP addresses and assign them while creating an instance, or you can have the addresses auto-assigned. With either choice, the public IP addresses won’t change when you restart the nodes or the instance.
Private IP addresses The private IP addresses are auto-assigned when the service instance is created. The addresses will not change when you restart the nodes or the instance. The private IP addresses are auto-assigned when the service instance is created. The addresses might change when you restart the nodes or the instance. For an instance attached to an IP network, when you restart a node, you can assign a fixed private IP address.
Cloning Supported for all service instances, except instances associated with Oracle Cloud Infrastructure Database or Oracle Autonomous Database. Supported for all service instances.
Restrictions when using colocated snapshots No restrictions for colocated snapshots. Colocated snapshots (stored in block storage) impose the following restrictions:
  • You can’t delete or scale-in an instance that has a snapshot.
  • You can’t delete a snapshot if a clone created from it exists.
  • You can’t create a snapshot of a clone.
Scaling a cluster automatically Not supported Supported
Adding block storage You can perform the add-storage operation up to 29 times for a node. In each operation, you can add 50 GB or a multiple of 50. You can perform the add-storage operation up to 6 times for a node. In each operation, you can add from 1 to 2048 GB.
Managing access rules Configure security rules using the Oracle Cloud Infrastructure interfaces. Use the Oracle Java Cloud Service interfaces to configure access rules.
Load balancer options available within Oracle Java Cloud Service While creating an instance, if you enable Oracle Identity Cloud Service as the identity provider, an Oracle-managed load balancer in Oracle Cloud Infrastructure Load Balancing is created and configured automatically for the instance.

If you don’t enable Oracle Identity Cloud Service, then you can create an instance with an Oracle-managed load balancer or an Oracle Traffic Director load balancer. Or you can choose not to configure a load balancer.

If you don't add any load balancer at the time of instance provisioning, you can add an Oracle Traffic Director load balancer to the existing instance later.

You cannot use the Oracle Java Cloud Service Console to add an Oracle-managed load balancer to an existing service instance.

You cannot use the Oracle Java Cloud Service Console to remove an Oracle-managed load balancer from an existing service instance.

You can use the Oracle Java Cloud Service REST API to remove an Oracle-managed load balancer from an existing service instance.

While creating an instance, if you enable Oracle Identity Cloud Service as the identity provider, an Oracle-managed load balancer is created and configured automatically for the instance.

If you don’t enable Oracle Identity Cloud Service, then you can add Oracle Traffic Director as a user-managed load balancer, either while creating the instance or later. Or you can choose not to configure a load balancer.

You cannot use the Oracle Java Cloud Service Console to add an Oracle-managed load balancer to an existing service instance.

You cannot use the Oracle Java Cloud Service Console or REST API to remove an Oracle-managed load balancer from an existing service instance.

Object storage for backups You must create the object storage bucket in Oracle Cloud Infrastructure before creating the instance. You can create the object storage container either before or during instance creation.
Changing the database association for an instance Not supported After creating an instance, you can change the infrastructure database (Oracle Database Cloud Service deployment) that the instance is associated with.

Migrating to Oracle Cloud Infrastructure

To migrate your existing Oracle Java Cloud Service instances to Oracle WebLogic Server for Oracle Cloud Infrastructure (Oracle WebLogic Server for OCI), use the following methods: