As part of the Enterprise Deployment Guide (EDG) Oracle recommend using a virtual IP (VIP) for the admin server. This article explains the steps to setup a VIP and failover the admin server (collocated).
There is no need to create a new compute node for the admin server. Compute nodes in MyST are represented as physical servers.
Start by setting the machine listen address which MyST references for the AdminServer listen address.
In order to failover the Adminserver you will need to move the Admin Server product within the Compute Nodes.
Moving the Admin Server product in older versions of MyST caused invalid auto computed properties to be generated. Upgrade to 6.5.0-rc8+ for an improved experience.
MyST uses the admin server machine's listen address to also set the admin server listen address. Here we set the machine listen address.
Configuration change sin MyST are required to fail over the admin server to another node in the domain.
Force MyST to update the platform model [pmNN] revision (which contains the above compute node changes) you can use the reprovision option while selecting 'Environment already pre-provisioned' checkbox.
The MyST actions are expected to work as normal. No changes are required.