OSDOCS-6720: Adding upgrade book to MicroShift

Author: ShaunaDiaz

_topic_maps/_topic_map_ms.yml

@@ -58,6 +58,13 @@ Topics:
 - Name: Greenboot health check
   File: microshift-greenboot
 ---
+Name: Updating clusters
+Dir: microshift_updating
+Distros: microshift
+Topics:
+- Name: About MicroShift updates
+  File: microshift-about-updates
+---
 Name: Support
 Dir: microshift_support
 Distros: microshift

microshift_updating/_attributes

@@ -0,0 +1 @@
+../_attributes

microshift_updating/images

@@ -0,0 +1 @@
+../images

microshift_updating/microshift-about-updates.adoc

@@ -0,0 +1,48 @@
+:_content-type: ASSEMBLY
+[id="microshift-about-updates"]
+=  About {product-title} updates
+include::_attributes/attributes-microshift.adoc[]
+:context: microshift-about-updates
+
+toc::[]
+
+You can update a {product-title} cluster by using the OpenShift CLI (`oc`).
+// This PR is for the book build. Note that the OCP structure consists of a landing page of xrefs to other major sections within the book. MicroShift likely does not require that depth of structure, so starting simply with one page.
+
+[id="microshift-about-updates-understanding-microshift-updates"]
+== Understanding {product-title} updates
+{product-title} updates are available as either RPMs or by embedding the {product-title} image in an RPM OSTree blueprint.
+You can update an {product-title} cluster by using the OpenShift CLI (`oc`).
+//Platform administrators can view new update options by looking at the output of the `oc adm upgrade` command.
+//An update begins when...
+
+[NOTE]
+====
+Operators previously installed must be reinstalled using manifests.
+====
+
+[id="microshift-about-updates-rpm-updates"]
+=== RPM updates
+Using the RPM update method replaces your existing version. No rollback is possible with this update type.
+//we can call a module here or xref out; not sure the best method for our use case until we have the content
+
+[id="microshift-about-updates-rpm-ostree-updates"]
+=== RPM OSTree updates
+Using the RPM OSTree update path allows for system rollback.
+//we can call a module here or xref out; not sure the best method for our use case until we have the content
+
+[id="microshift-about-updates-checking-version-update-compatibility"]
+== Checking version update compatibility
+Before attempting an update, determine which version of {product-title} you have installed. Only the following update paths are supported:
+
+* Version 4.13 to 4.14
+//replace with matrix including RHEL versions?
+//place xref here to version-check assembly
+
+[id="microshift-about-updates-update-disconnected-environment"]
+== Updating a cluster in a disconnected environment
+//sample topic only
+
+[id="microshift-about-updates-troubleshooting-updates"]
+== Troubleshooting updates
+//sample topic only

microshift_updating/modules

@@ -0,0 +1 @@
+../modules

microshift_updating/snippets

@@ -0,0 +1 @@
+../snippets/