<p>The pending maintenance action to apply to this resource.</p> <p>Valid values: <code>os-upgrade</code>, <code>system-update</code>, <code>db-upgrade</code> </p>

<p>A value that specifies the type of opt-in request, or undoes an opt-in request. You can't undo an opt-in request of type <code>immediate</code>.</p> <p>Valid values:</p> <ul> <li> <p> <code>immediate</code> - Apply the maintenance action immediately.</p> </li> <li> <p> <code>next-maintenance</code> - Apply the maintenance action during the next maintenance window for the resource.</p> </li> <li> <p> <code>undo-opt-in</code> - Cancel any existing <code>next-maintenance</code> opt-in requests.</p> </li> </ul>