At https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/17.1/html-single/performing_a_minor_update_of_red_hat_openstack_platform/index#assembly_preparing-for-a-minor-update_keeping-updated
, the doc describes the workflow of minor update.

There is a sentence about composable roles with pacemaker services.
~~~
Overcloud update of Controller nodes and composable nodes that contain Pacemaker services
~~~

However, composable roles "without Pacemaker services", e.g. Networker, are not mentioned.
We should have what timing is the best for composable nodes with no pacemaker services.