RHV-16816 make 120GiB disk size more prominent and help users notice vm template prerequisite

installing/installing_rhv/installing-rhv-default.adoc

@@ -44,8 +44,6 @@ include::modules/ssh-agent-using.adoc[leveloffset=+1]
 
 include::modules/installation-obtaining-installer.adoc[leveloffset=+1]
 
-include::modules/installation-initializing.adoc[leveloffset=+1]
-
 include::modules/installation-launching-installer.adoc[leveloffset=+1]
 
 [IMPORTANT]

modules/installation-launching-installer.adoc

@@ -86,7 +86,7 @@ ifeval::["{context}" == "installing-rhv-default"]
 endif::[]
 
 [id="installation-launching-installer_{context}"]
-= Deploy the cluster
+= Deploying the cluster
 
 You can install {product-title} on a compatible cloud platform.
 
@@ -101,6 +101,10 @@ ifndef::osp,rhv[* Configure an account with the cloud platform that hosts your c
 
 * Obtain the {product-title} installation program and the pull secret for your
 cluster.
+ifdef::rhv[]
+* xref:../../installing/installing_rhv/installing-rhv-creating-custom-vm.adoc#installing-rhv-creating-custom-vm[Create a custom virtual machine template on {rh-virtualization}]. Otherwise, the {product-title} cluster will fail.
+endif::rhv[]
+
 
 .Procedure
 

modules/installing-rhv-requirements.adoc

@@ -29,7 +29,7 @@ If you increase the resources when you create the virtual machine template, or i
 *** 16 GiB or more for each of the three control plane machines which provide the control plane.
 *** 16 GiB or more for each of the three compute machines, which run the application workloads.
 * The {rh-virtualization} storage domain must meet link:https://access.redhat.com/solutions/4770281[these etcd backend performance requirements].
-* The {rh-virtualization} storage domain must have 230 GiB or more for the {product-title} cluster. For production environments, where each virtual machine must have 120 GiB or more, the storage domain must have 840 GiB or more for the {product-title} cluster.
+* In production environments, each virtual machine must have 120 GiB or more, so the storage domain must have 840 GiB or more for the {product-title} cluster. In resource-constrained or non-production environments, each virtual machine must have 32 GiB or more, so the storage domain must have 230 GiB or more for the {product-title} cluster.
 * The {rh-virtualization} cluster must have access to an Internet connection to download images from the Red Hat Ecosystem Catalog during installation and updates, and for the Telemetry service to simplify the subscription and entitlement process.
 * The {rh-virtualization} cluster has a virtual network with access to the REST API on the {rh-virtualization} Manager.
 

modules/installing-rhv-using-ansible-playbook.adoc

@@ -39,7 +39,7 @@ $ vi upload_rhcos_disk.yaml
       ovirt_disk:
         auth: "{{ ovirt_auth }}"
         name: <rhcos_44-81_img-diskname> <4>
-        size: 32GiB <5>
+        size: 120GiB <5>
         interface: virtio_scsi
         storage_domain: <SSD_RAID_10> <6>
         bootable: yes
@@ -51,7 +51,7 @@ $ vi upload_rhcos_disk.yaml
 <2> For `<username@profile>`, specify the admin user name and profile.
 <3> For `<password>`, specify the admin password.
 <4> For `<rhcos_44-81_img-diskname>`, specify a disk name.
-<5> Specify `32GiB`, the default value, or more. `120GiB` is the minimum for production environments.
+<5> Specify `120GiB` or more for production environments. For resource-constrained or non-production environments, specify `32GiB` or more.
 <6> For `<SSD_RAID_10>`, specify a data storage domain name.
 <7> Specify a timeout period, in seconds, that gives your {rh-virtualization} environment enough time to upload a 2.4 GB image to storage. The default value, `3600` seconds, gives one hour.
 <8> For `</custom/rhcos-44.81.202003110027-0-openstack.x86_64.qcow2>`, specify the image path and file name.