ver 4

ansible.cfg

@@ -2,3 +2,4 @@
 inventory = inventory.yml
 roles_path = ./roles
 force_color = true
+interpreter_python = /usr/bin/python3

inventory.yml

@@ -1,6 +1,4 @@
 all:
-  children:
-    postgres_servers:
   hosts:
     192.168.0.71:
       ansible_user: ansible

roles/postgresql/tasks/configure.yml

@@ -1,4 +1,4 @@
-- name: Configure postgresql.conf with template
+- name: Configure postgresql.conf
   template:
     src: postgresql.conf.j2
     dest: /var/lib/pgsql/data/postgresql.conf
@@ -7,7 +7,7 @@
     mode: '0644'
   notify: Restart PostgreSQL
 
-- name: Configure pg_hba.conf with template
+- name: Configure pg_hba.conf
   template:
     src: pg_hba.conf.j2
     dest: /var/lib/pgsql/data/pg_hba.conf

roles/postgresql/tasks/databases.yml

@@ -5,7 +5,7 @@
     encoding: UTF8
     state: present
 
-- name: Create contacts table in PostgreSQL
+- name: Create contacts table
   community.postgresql.postgresql_query:
     db: '{{ postgres_db }}'
     query: |

roles/postgresql/tasks/insert_data.yml

@@ -1,4 +1,4 @@
-- name: Insert data into PostgreSQL database idempotently
+- name: Insert data into PostgreSQL database
   community.postgresql.postgresql_query:
     db: '{{ postgres_db }}'
     query: |

roles/postgresql/tasks/open_firewall.yml

@@ -5,6 +5,8 @@
     state: enabled
   become: true
 
-- name: Reload firewall using command
+- name: Reload firewalld
-  command: firewall-cmd --reload
+  systemd:
+    name: firewalld
+    state: reloaded
   become: true

roles/postgresql/templates/postgresql.conf.j2

@@ -1,12 +1,11 @@
-listen_addresses = '{{ postgres_listen_addresses | default("*") }}'
+listen_addresses = '{{ postgres_listen_addresses }}'
 
-port = {{ postgres_port | default(5432) }}
+port = {{ postgres_port }}
 
-
+max_connections = {{ postgres_max_connections }}
-max_connections = {{ postgres_max_connections | default(100) }}
+shared_buffers = {{ postgres_shared_buffers }}
-shared_buffers = {{ postgres_shared_buffers | default("128MB") }}
+effective_cache_size = {{ postgres_effective_cache_size }}
-effective_cache_size = {{ postgres_effective_cache_size | default("4GB") }}
+maintenance_work_mem = {{ postgres_maintenance_work_mem }}
-maintenance_work_mem = {{ postgres_maintenance_work_mem | default("64MB") }}
+checkpoint_completion_target = {{ postgres_checkpoint_completion_target }}
-checkpoint_completion_target = {{ postgres_checkpoint_completion_target | default(0.7) }}
+wal_buffers = {{ postgres_wal_buffers }}
-wal_buffers = {{ postgres_wal_buffers | default("16MB") }}
+default_statistics_target = {{ postgres_default_statistics_target }}
-default_statistics_target = {{ postgres_default_statistics_target | default(100) }}

roles/postgresql/vars/main.yml

@@ -8,3 +8,11 @@ postgres_hba_entries:
 backup_dir: "/var/backups/postgresql"
 postgres_user: "postgres"
 postgres_db: "mydb"
+
+postgres_max_connections: 100
+postgres_shared_buffers: '128MB'
+postgres_effective_cache_size: '4GB'
+postgres_maintenance_work_mem: '64MB'
+postgres_checkpoint_completion_target: 0.7
+postgres_wal_buffers: '16MB'
+postgres_default_statistics_target: 100