Stop relying on old legacy sub_nodes_private

Add subnodes to the inventory.

Change-Id: I335f0bba2ca9c3e7e427e9247692c5c0d17b4087

config/nodes/1ctlr.yml

@@ -9,7 +9,7 @@ node_count: 1
 
 deployed_server_overcloud_roles:
   - name: Controller
-    hosts: "$(sed -n 1,1p /etc/nodepool/sub_nodes_private)"
+    hosts: "{{ subnodes.0 }}"
 
 topology: >-
   --compute-scale 0

config/nodes/2ctlr.yml

@@ -13,9 +13,9 @@ node_count: 2
 
 deployed_server_overcloud_roles:
   - name: ControllerApi
-    hosts: $(sed -n 1,1p /etc/nodepool/sub_nodes_private)
+    hosts: "{{ subnodes.0 }}"
   - name: Controller
-    hosts: "$(sed -n 2,2p /etc/nodepool/sub_nodes_private)"
+    hosts: "{{ subnodes.1 }}"
 
 topology: >-
   --compute-scale 0

roles/tripleo-inventory/tasks/inventory.yml

@@ -39,21 +39,60 @@
         ansible_private_key_file: "{{ overcloud_key }}"
         ansible_ssh_extra_args: '-F "{{ local_working_dir }}/ssh.config.ansible"'
 
-- when: inventory == 'multinode'
+- name: check existence of legacy nodepool directory
+  stat:
+    path: /etc/nodepool/sub_nodes_private
+  register: stat_subnodes_private_result
+
+- when: inventory == 'multinode' and stat_subnodes_private_result.stat.exists == True
   block:
     - name: Get subnodes
       command: cat /etc/nodepool/sub_nodes_private
       register: nodes
 
-    - name: Add subnode to ansible inventory
-      with_indexed_items: '{{ nodes.stdout_lines | default([]) }}'
+    - name: Create empty subnodes
+      set_fact:
+        subnodes: "[]"
+
+    - name: Add subnodes info from legacy nodepool directory
+      set_fact:
+        subnodes: "{{ subnodes }} + [item]"
+      with_items: '{{ nodes.stdout_lines | default([]) }}'
+
+- name: Add subnode to ansible inventory
+  with_indexed_items: "{{ subnodes }}"
+  add_host:
+    name: 'subnode-{{ item.0 + 2 }}'
+    groups: "overcloud"
+    ansible_host: "{{ item.1 }}"
+    inventory_ip: "{{ item.1 }}"
+    ansible_user: "{{ lookup('env','USER') }}"
+    ansible_private_key_file: "/home/{{ ansible_user }}/.ssh/id_rsa"
+  when: inventory == 'multinode'
+
+- name: check existence of legacy nodepool primary node file
+  stat:
+    path: /etc/nodepool/primary_node_private
+  register: stat_primary_node_result
+
+- when: inventory == 'multinode' and stat_primary_node_result.stat.exists == True
+  block:
+    - name: Get primary nodes
+      command: cat /etc/nodepool/primary_node_private
+      register: primary_node_private
+
+    - name: Create primary_node
+      set_fact:
+        primary_node: "{{ primary_node_private.stdout | default('') }}"
+
+    - name: Add primary_node to ansible inventory
       add_host:
-        name: 'subnode-{{ item.0 + 2 }}'
-        groups: "overcloud"
-        ansible_host: '{{ item.1 }}'
-        inventory_ip: '{{ item.1 }}'
+        name: 'primary_node'
+        groups: "undercloud"
+        ansible_host: "{{ primary_node }}"
+        inventory_ip: "{{ primary_node }}"
         ansible_user: "{{ lookup('env','USER') }}"
-        ansible_private_key_file: "/etc/nodepool/id_rsa"
+        ansible_private_key_file: "/home/{{ ansible_user }}/.ssh/id_rsa"
 
 #required for regeneration of ssh.config.ansible
 - name: set_fact for undercloud ip