feat: add tests for Ansible Verifier

.config/molecule/config.yml

@@ -44,4 +44,3 @@ scenario:
 
 verifier:
   name: ansible
-  enabled: false # TODO

molecule/default/group_vars/all.yml

@@ -0,0 +1,4 @@
+---
+postgres_db_name: postgres
+postgres_user: postgres
+postgres_password: postgres

molecule/default/verify.yml

@@ -0,0 +1,20 @@
+---
+- name: Molecule | Verify | All
+  hosts: all
+
+  tasks:
+    - name: Molecule | Verify | Include all tests
+      ansible.builtin.include_tasks: "{{ item }}"
+      with_fileglob:
+        - ../tests/postgres/postgres.yml
+        - ../tests/patroni/*.yml
+        - ../tests/etcd/*.yml
+
+- name: Molecule | Verify | Replica
+  hosts: replica
+
+  tasks:
+    - name: Molecule | Verify | Include replica tests
+      ansible.builtin.include_tasks: "{{ item }}"
+      with_fileglob:
+        - ../tests/postgres/replication.yml

molecule/tests/etcd/etcd.yml

@@ -0,0 +1,7 @@
+---
+- name: Check etcd health
+  uri:
+    url: "http://{{ inventory_hostname }}:2379/health"
+    return_content: true
+  register: etcd_health_status
+  failed_when: "(etcd_health_status.content | from_json).health != 'true'"

molecule/tests/patroni/patroni.yml

@@ -0,0 +1,7 @@
+---
+- name: Check Patroni status
+  uri:
+    url: "http://{{ inventory_hostname }}:8008/patroni"
+    return_content: true
+  register: patroni_status
+  failed_when: "'running' not in patroni_status.content"

molecule/tests/postgres/postgres.yml

@@ -0,0 +1,23 @@
+---
+- name: Check if PostgreSQL process is running
+  command: pgrep -u postgres
+  register: result
+  failed_when: result.rc != 0
+
+- name: Check if PostgreSQL is listening on the default port
+  wait_for:
+    port: 5432
+    timeout: 5
+  register: is_listening
+  failed_when: not is_listening
+
+- name: Try to connect to PostgreSQL
+  postgresql_ping:
+    login_user: "{{ postgres_user }}"
+    login_password: "{{ postgres_password }}"
+    db: postgres
+
+- name: Check if the database exists
+  postgresql_db:
+    name: "{{ postgres_db_name }}"
+    state: present

molecule/tests/postgres/replication.yml

@@ -0,0 +1,9 @@
+---
+- name: Check PostgreSQL replication status
+  postgresql_query:
+    db: "{{ postgres_db_name }}"
+    login_user: "{{ postgres_user }}"
+    login_password: "{{ postgres_password }}"
+    query: "SELECT * FROM pg_stat_wal_receiver;"
+  register: pg_replication_status
+  failed_when: "pg_replication_status.rowcount == 0"