Support minimalistic 3-node OCP config (#67)

Fixes #65

Signed-off-by: Yussuf Shaikh <yussuf@us.ibm.com>

docs/quickstart.md

@@ -44,7 +44,7 @@ Update the following variables specific to your cluster requirement. All the var
     * `memory` : Memory in MBs required for master nodes.
     * `vcpu` : Number of VCPUs to use for master  nodes.
     * `count` : Number of master nodes.
- * `worker` : Map of below parameters for worker hosts. (Atleaset 2 Workers are required for running router pods in HA mode)
+ * `worker` : Map of below parameters for worker hosts.
     * `memory` : Memory in MBs required for worker nodes.
     * `vcpu` : Number of VCPUs to use for worker nodes.
     * `count` : Number of worker nodes.

modules/5_install/templates/helpernode_vars.yaml

@@ -25,15 +25,19 @@ masters:
     ipaddr: "${m.ip}"
     macaddr: "${m.mac}"
 %{ endfor ~}
+%{ if length(worker_info) > 0 }
 workers:
 %{ for w in worker_info ~}
   - name: "${w.name}"
     ipaddr: "${w.ip}"
     macaddr: "${w.mac}"
 %{ endfor ~}
-
+%{ endif }
 ppc64le: true
 ssh_gen_key: false
 
 ocp_client: "${client_tarball}"
 ocp_installer: "${install_tarball}"
+
+# This is required for latest helpernode. TODO: Remove when https://github.com/RedHatOfficial/ocp4-helpernode/pull/140 is merged
+helm_source: "https://get.helm.sh/helm-v3.4.0-linux-ppc64le.tar.gz"

variables.tf

@@ -150,13 +150,13 @@ variable "installer_log_level" {
 variable "helpernode_tag" {
     description = "Set the branch/tag name or commit# for using ocp4-helpernode repo"
     # Checkout level for https://github.com/RedHatOfficial/ocp4-helpernode which is used for setting up services required on bastion node
-    default = "fddbbc651153ef2966e5cb4d4167990b31c01ceb"
+    default = "dd8a0767c677fc862e45b6d70e5d04656ced5d28"
 }
 
 variable "install_playbook_tag" {
     description = "Set the branch/tag name or commit# for using ocp4-playbooks repo"
     # Checkout level for https://github.com/ocp-power-automation/ocp4-playbooks which is used for running ocp4 installations steps
-    default = "02a598faa332aa2c3d53e8edd0e840440ff74bd5"
+    default = "b07c89deacb04f996834403b1efdafb1f9a3d7c4"
 }
 
 variable "ansible_extra_options" {