Run "Create stanza" only on master if it's not posix (#786)

This update modifies the stanza creation process for pgbackrest to run on all nodes only if repo1-type is posix. For other types (e.g., S3), the stanza creation is limited to the primary node, addressing errors caused by running stanza creation on multiple hosts in non-posix setups.

Author: vitabaks

automation/roles/pgbackrest/stanza-create/tasks/main.yml

@@ -2,10 +2,10 @@
 
 # Create a stanza locally (if "pgbackrest_repo_host" is not set)
 - block:
-    - name: Get repo1-path value
+    - name: Get repo1-path and repo1_type value
       ansible.builtin.set_fact:
         repo1_path: "{{ pgbackrest_conf['global'] | selectattr('option', 'equalto', 'repo1-path') | map(attribute='value') | list | first }}"
-      when: pgbackrest_repo_type | lower == 'posix'
+        repo1_type: "{{ pgbackrest_conf['global'] | selectattr('option', 'equalto', 'repo1-type') | map(attribute='value') | list | first }}"
 
     - name: "Make sure the {{ repo1_path }} directory exists"
       ansible.builtin.file:
@@ -14,7 +14,7 @@
         owner: postgres
         group: postgres
         mode: "0750"
-      when: repo1_path | default('') | length > 0
+      when: repo1_type | lower == 'posix'
 
     - name: Create stanza "{{ pgbackrest_stanza }}"
       become: true
@@ -24,6 +24,8 @@
       changed_when:
         - stanza_create_result.rc == 0
         - stanza_create_result.stdout is not search("already exists")
+      when: repo1_type | lower == 'posix' or
+            (repo1_type | lower != 'posix' and inventory_hostname == groups['master'][0])  # run only on master if it's not posix
   when:
     - pgbackrest_repo_host | length < 1
     - "'postgres_cluster' in group_names"