Patching Oracle Database Appliance (ODA)

Oracle Database Appliance (ODA) is a rack mounted "all-in-one" box supplied by Oracle. It contains 2 nodes, 2 networks, 2 power supplies and a bunch of storage accessible to both nodes.
It can be virtualised or bare-metal. You can setup single instance databases, RAC-One (active-passive) or RAC databases (active-active).
A whole new set of commands is used to interact with ODA - oakcli.
For example to create a database on ODA, it's no longer

dbca

it's

oakcli create database -d <database name>

Patching ODA means patching the O/S, the Grid Infrastructure (GI) and the RDBMS.
Useful ODA documents:

• Database Appliance Administration and Reference Guide
• Master ODA document
• Oracle Database Appliance - 12.1.2 and 2.X Supported ODA Versions & Known Issues (Doc ID 888888.1)