Before installing a management agent for the OCI Database Management Service, you need to perform the following steps1:
* Create or copy an Agent Install Key. An Agent Install Key is a unique identifier that is used to authenticate the management agent installation process. You can create or copy an Agent Install Key from the OCI Console or the API. You need to provide the Agent Install Key when you run the installation script on the host where you want to install the management agent2.
* Confirm the OS and networking requirements. You need to ensure that the host where you want to install the management agent meets the minimum OS and networking requirements. The OS requirements include the supported OS versions, packages, and permissions. The networking requirements include the firewall rules, proxy settings, and DNS resolution. You can use the preinstall script to verify the OS and networking requirements on the host3.
Therefore, statements A and D are correct, and statements B, C, and E are incorrect. Creating or copying an Agent OCID is not a prerequisite for installing a management agent, as the Agent OCID is generated automatically after the installation is completed4. Patching the database to be managed is not a prerequisite for installing a management agent, as the management agent does not depend on the database version or patch level. Installing TLS 1.3 on the database system is not a prerequisite for installing a management agent, as the management agent uses TLS 1.2 to communicate with the Database Management Service. References:
1: Install Management Agents 2: Create or Copy an Agent Install Key, Section 2.1 3: Confirm the OS and Networking Requirements, Section 2.2 4: View Management Agent Details, Section 3.1 : [Oracle Cloud Infrastructure Documentation], Database Management Service Overview : [Oracle Cloud Infrastructure Documentation], Security in Database Management Service