Enable some debugging if no DNS records

It seems some scenarios might lead to no DNS records. This isn't normal,
and we need to know why we're hitting that issue.

This patch should help tracking down the issue.

roles/libvirt_manager/tasks/reserve_dnsmasq_ips.yml

@@ -42,59 +42,94 @@
     label: "{{ host_data.key }} - {{ net.name }}"
     loop_var: "host_data"
 
-- name: Create host records
-  when:
-    - host_data.value.networks[_cleaned_netname] is defined
+- name: Manage common parameters
   vars:
-    _net_name: >-
-      {{ (net.name is match '.*osp_trunk$') | ternary('ctlplane', net.name) }}
-    _cleaned_netname: "{{ _net_name | regex_replace('^cifmw[_-]', '') }}"
-    _net_data: "{{ host_data.value.networks[_cleaned_netname] }}"
-    _ocp_name: >-
-      {{
-        host_data.key | replace('_', '-') |
-        replace('ocp-worker', 'worker') |
-        replace('ocp', 'master')
-      }}
-    _hostname: >-
-      {{
-        (host_data.key is match('^ocp.*')) |
-        ternary(_ocp_name, host_data.key)
-      }}
     _translate: >-
       {{ cifmw_networking_mapper_interfaces_info_translations | default({}) }}
     _net_domain: >-
       {{
         (net.name in _translate) |
         ternary(_translate[net.name], [net.name])
       }}
-    _fqdn: >-
-      {%- if net.name == cifmw_libvirt_manager_pub_net -%}
-      {{ [_hostname ~ '.' ~ cifmw_reproducer_domain | default('local')] }}
-      {%- else -%}
-      {{
-        [_hostname] | product(_net_domain) |
-        map('join', '.') |
-        product([cifmw_reproducer_domain | default('local')]) |
-        map('join', '.')
-      }}
-      {%- endif -%}
-    _record:
-      - state: present
-        ips: >-
+    _net_name: >-
+      {{ (net.name is match '.*osp_trunk$') | ternary('ctlplane', net.name) }}
+    _cleaned_netname: "{{ _net_name | regex_replace('^cifmw[_-]', '') }}"
+  block:
+    - name: Create host records
+      when:
+        - host_data.value.networks[_cleaned_netname] is defined
+      vars:
+        _net_data: "{{ host_data.value.networks[_cleaned_netname] }}"
+        _ocp_name: >-
           {{
-            [
-              _net_data.ip_v4 | default(''),
-              _net_data.ip_v6 | default('')
-            ]
+            host_data.key | replace('_', '-') |
+            replace('ocp-worker', 'worker') |
+            replace('ocp', 'master')
           }}
-        names: "{{ _fqdn }}"
-  ansible.builtin.set_fact:
-    host_records: "{{ host_records | default([]) + _record }}"
-  loop: "{{ cifmw_networking_env_definition.instances | dict2items }}"
-  loop_control:
-    label: "{{ host_data.key }} - {{ net.name }}"
-    loop_var: "host_data"
+        _hostname: >-
+          {{
+            (host_data.key is match('^ocp.*')) |
+            ternary(_ocp_name, host_data.key)
+          }}
+        _fqdn: >-
+          {%- if net.name == cifmw_libvirt_manager_pub_net -%}
+          {{ [_hostname ~ '.' ~ cifmw_reproducer_domain | default('local')] }}
+          {%- else -%}
+          {{
+            [_hostname] | product(_net_domain) |
+            map('join', '.') |
+            product([cifmw_reproducer_domain | default('local')]) |
+            map('join', '.')
+          }}
+          {%- endif -%}
+        _record:
+          - state: present
+            ips: >-
+              {{
+                [
+                  _net_data.ip_v4 | default(''),
+                  _net_data.ip_v6 | default('')
+                ]
+              }}
+            names: "{{ _fqdn }}"
+      ansible.builtin.set_fact:
+        host_records: "{{ host_records | default([]) + _record }}"
+      loop: "{{ cifmw_networking_env_definition.instances | dict2items }}"
+      loop_control:
+        label: "{{ host_data.key }} - {{ net.name }}"
+        loop_var: "host_data"
+
+    - name: Debugging block/rescue
+      block:
+        - name: Assert we have records
+          ansible.builtin.assert:
+            that:
+              - host_records is defined
+
+      rescue:
+        - name: Debug net.name
+          ansible.builtin.debug:
+            msg: "net.name: {{ net.name }}"
+
+        - name: Debug _translate
+          ansible.builtin.debug:
+            var: _translate
+
+        - name: Debug _net_domain
+          ansible.builtin.debug:
+            var: _net_domain
+
+        - name: Debug _net_name
+          ansible.builtin.debug:
+            var: _net_name
+
+        - name: Debug _cleaned_netname
+          ansible.builtin.debug:
+            var: _cleaned_netname
+
+        - name: Fail for good
+          ansible.builtin.fail:
+            msg: "Error detected, please check debug above"
 
 - name: Inject host records
   vars: