fix: add Loki template validation and resource debugging

ansible/roles/observability/tasks/main.yml

@@ -64,8 +64,22 @@
     --namespace {{ observability_namespace }}
     --version {{ loki_chart_version }}
     --values /tmp/loki-values.yaml
+  register: loki_template
   changed_when: false
 
+- name: Show Loki template output (check for StatefulSet)
+  debug:
+    msg: "Loki template contains StatefulSet: {{ 'kind: StatefulSet' in loki_template.stdout }}"
+  when: "'kind: StatefulSet' not in loki_template.stdout"
+
+- name: Fail if Loki template produces no StatefulSet
+  fail:
+    msg: |
+      Loki Helm template produces no StatefulSet. Check values configuration.
+      Template output (first 100 lines):
+      {{ loki_template.stdout.split('\n')[:100] | join('\n') }}
+  when: "'kind: StatefulSet' not in loki_template.stdout"
+
 - name: Remove legacy Loki scalable workloads (if present)
   command: >-
     kubectl -n {{ observability_namespace }} delete
@@ -116,7 +130,7 @@
   failed_when: false
   changed_when: true
 
-- name: Show Loki Helm install output
+- name: Show Loki Helm install result
   debug:
     msg: |
       Helm install rc: {{ loki_install.rc }}
@@ -124,7 +138,17 @@
       {{ loki_install.stdout }}
       Helm install stderr:
       {{ loki_install.stderr }}
-  when: loki_install.rc != 0
+
+- name: Show all Loki resources after install
+  command: kubectl -n {{ observability_namespace }} get all -l app.kubernetes.io/name=loki
+  register: loki_resources
+  changed_when: false
+  failed_when: false
+
+- name: Debug Loki resources
+  debug:
+    msg: "{{ loki_resources.stdout }}"
+  when: loki_resources.stdout | length > 0
 
 - name: Wait for Loki statefulset rollout
   command: kubectl -n {{ observability_namespace }} rollout status statefulset/loki --timeout=10m