add first part

deploy_postgres.yaml

+- name: Deploy postgres
+  hosts: all
+  become: true
+  roles:
+    - pg_install
\ No newline at end of file

inventories/openstack.yaml

 all:
   hosts:
     vm1:
-      ansible_host: 172.24.42.8
-      ansible_user: myusername
+      ansible_host: 10.129.178.113
+      ansible_user: root
       ansible_port: 22
-      ansible_password: password
-
+      ansible_password: .16*U3w

roles/pg_install/tasks/main.yaml

+    - name: Install PostgreSQL repository
+      ansible.builtin.apt:
+        update_cache: yes
+    - name: Install postgresql
+      ansible.builtin.apt:
+        name: postgresql
+        state: present
+    - name: Install python3-psycopg2
+      ansible.builtin.apt:
+        name: python3-psycopg2
+        state: present
+    - name: Start and enable the service
+      ansible.builtin.service:
+        name: postgresql
+        state: started
+        enabled: yes
+    - name: "Create app database"
+      postgresql_db:
+        state: present
+        name: "bdd"
+      become_user: postgres
+    - name: "Create db user"
+      postgresql_user:
+        state: present
+        name: postgres
+        password: postgres
+      become_user: postgres
+    - name: "Grant db user access to app db"
+      postgresql_privs:
+        type: database
+        database: postgres
+        privs: all
+        roles: postgres
+      become_user: postgres
+    - name: "Allow md5 connection for the db user"
+      postgresql_pg_hba:
+        dest: "/etc/postgresql/16/main/pg_hba.conf"
+        contype: host
+        method: md5
+        address: all
+      become_user: postgres
+    - name: "Define Listen address"
+      postgresql_set:
+        name: listen_addresses
+        value: '0.0.0.0'
+      become_user: postgres
+    - name: "Restart Postgresql"
+      ansible.builtin.service:
+        name: postgresql
+        state: restarted
+