Merge pull request #23 from markmc/plan

README: document what scripts will be included here

Author: markmc

README.md

@@ -1,6 +1,99 @@
 # install-scripts
 Installation scripts for OpenShift KNI clusters
 
+## What's going on here?
+
+KNI clusters consist of:
+
+* OpenShift deployed on physical hardware using OpenShift's [bare
+  metal
+  IPI](https://github.com/openshift/installer/blob/master/docs/user/metal/install_ipi.md)
+  platform based on [Metal³](http://metal3.io/).
+* OpenShift Container Storage (OCS) based on [Ceph
+  Rook](https://rook.io/) and using the [OCS
+  Operator](https://github.com/openshift/ocs-operator).
+* Container Native Virtualization (CNV) based on
+  [KubeVirt](https://kubevirt.io/) and using the [Hyperconverged
+  Cluster Operator
+  (HCO)](https://github.com/kubevirt/hyperconverged-cluster-operator).
+* 4x Dell PowerEdge R640 nodes, each with 2x Mellanox NICs, and 2x
+  Mellanox ethernet switches, all in a 12U rack. 1 node is used as a
+  "provisioning host", while the other 3 nodes are OpenShift control
+  plane machines.
+
+The goal of this repository is to provide scripts and tooling to ease
+the initial installation and validation of one of these clusters.
+
+The current target is OpenShift 4.2, OCS 4.2, and CNV 2.1. The scripts
+will need to support both published releases and [pre-release versions
+(#12)](https://github.com/openshift-kni/install-scripts/issues/12) of
+each of these.
+
+The scripts will:
+
+1. [Creates an admin user
+   (#21)](https://github.com/openshift-kni/install-scripts/issues/21)
+   with passwordless sudo on the provisioning host.
+1. Ensure the provisioning host has all [required software
+   installed](https://github.com/openshift-kni/install-scripts/blob/master/01_install_requirements.sh). This
+   script will also be used to [prepare an ISO image
+   (#20)](https://github.com/openshift-kni/install-scripts/issues/20)
+   to speed up this part of the installation process.
+1. [Validate any environment requirements
+   (#22)](https://github.com/openshift-kni/install-scripts/issues/22) -
+   the [bare metal IPI network
+   requirements](https://github.com/openshift/installer/blob/master/docs/user/metal/install_ipi.md#network-requirements)
+   are a good example of environment requirements.
+1. Apply any [configuration changes to the provisioning
+   host](https://github.com/openshift-kni/install-scripts/blob/master/02_configure_host.sh)
+   that are required for the OpenShift installer - for example,
+   creating the `default` libvirt storage pool and the `baremetal` and
+   `provisioning` bridges.
+1. [Prepare the node information
+   (#19)](https://github.com/openshift-kni/install-scripts/issues/19)
+   required for the [bare metal IPI
+   install-config](https://github.com/openshift/installer/blob/master/docs/user/metal/install_ipi.md#install-config).
+1. Launch the OpenShift installer and wait for the cluster
+   installation to complete.
+1. Complete some post-install configuration - including [machine/node
+   linkage
+   (#14)](https://github.com/openshift-kni/install-scripts/issues/14),
+   and [configuring a storage VLAN on the `provisioning` interface on
+   the OpenShift nodes
+   (#4)](https://github.com/openshift-kni/install-scripts/issues/4).
+1. [Deploy OCS
+   (#7)](https://github.com/openshift-kni/install-scripts/issues/7)
+   and [configure a Ceph cluster and
+   StorageClass](https://github.com/openshift-kni/install-scripts/blob/master/OCS/customize-ocs.sh). [Configure
+   the image registry to use an OCS PVC
+   (#5)](https://github.com/openshift-kni/install-scripts/issues/5)
+   for image storage.
+1. [Deploy
+   CNV](https://github.com/openshift-kni/install-scripts/blob/master/CNV/deploy-cnv.sh). [Configure
+   a bridge on the `baremetal` interface on OpenShift nodes
+   (#18)](https://github.com/openshift-kni/install-scripts/issues/18)
+   to allow VMs access this network.
+1. Temporarily install Ripsaw, carry out some performance tests, and
+   capture the results.
+
+The following environment-specific information will be required for
+each installation:
+
+1. A pull secret - used to access OpenShift content - and an SSH key
+   that will be used to authenticate SSH access to the control plane
+   machines.
+1. The cluster name and the domain name under which it will be
+   available.
+1. The network CIDR in which the machines will be allocated IPs on the
+   `baremetal` network interface.
+1. The [3 IP addresses
+   reserved](https://github.com/openshift/installer/blob/master/docs/user/metal/install_ipi.md#network-requirements)
+   for API, Ingress, and DNS access.
+1. The BMC IPMI addresses and credentials for the 3 control plane
+   machines.
+1. Optionally, a Network Time Protocol (NTP) server where the default
+   public server is not accessible
+
 ## Provisioning Host Setup
 
 The provisioning host must be a RHEL-8 machine.