[NEW added postgresql installation ansible playbook

Ansible/postgresql/inventory.ini

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+[postgresql_servers]
+server1 ansible_host=34.69.104.233 ansible_user=ismoilovdev
+server2 ansible_host=34.27.32.115 ansible_user=ismoilovdev
+server3 ansible_host=34.170.180.55 ansible_user=ismoilovdev

Ansible/postgresql/main.yml

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+---
+postgresql_version: 16
+postgresql_password: "oasjofdjqpwe"
+listen_address: "*"  # Postgresql.conf'da kiritiladi
+expose_address: "0.0.0.0/0"  # pg_hba.conf'da kiritiladi

Ansible/postgresql/postgresql_install.yml

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+---
+- name: Install and configure PostgreSQL
+  hosts: postgresql_servers
+  become: yes
+  vars_files:
+    - main.yml
+
+  tasks:
+    - name: Detect operating system family
+      set_fact:
+        os_family: "{{ ansible_os_family }}"
+
+    - name: Include Debian-based tasks if OS family is Debian
+      include_tasks: tasks/install_postgresql_debian.yml
+      when: ansible_os_family == "Debian"
+
+    - name: Include Red Hat-based tasks if OS family is RedHat
+      include_tasks: tasks/install_postgresql_redhat.yml
+      when: ansible_os_family == "RedHat"
+
+    - name: Configure PostgreSQL after installation
+      include_tasks: tasks/configure_postgresql.yml

Ansible/postgresql/tasks/configure_postgresql.yml

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+---
+- name: Set PostgreSQL user password using psql as root
+  become: yes
+  shell: su - postgres -c "psql -c \"ALTER USER postgres PASSWORD '{{ postgresql_password }}';\""
+
+- name: Configure PostgreSQL to listen on all interfaces
+  lineinfile:
+    path: "/etc/postgresql/{{ postgresql_version }}/main/postgresql.conf"
+    regexp: "^#listen_addresses ="
+    line: "listen_addresses = '{{ listen_address }}'"
+    state: present
+
+- name: Add pg_hba.conf rules
+  lineinfile:
+    path: "/etc/postgresql/{{ postgresql_version }}/main/pg_hba.conf"
+    line: "host    all             all              {{ expose_address }}              md5"
+    state: present
+
+- name: Restart PostgreSQL service
+  systemd:
+    name: "postgresql"
+    state: restarted

Ansible/postgresql/tasks/install_postgresql_debian.yml

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+---
+- name: Install prerequisites on Debian-based systems
+  apt:
+    name:
+      - curl
+      - ca-certificates
+      - postgresql-common
+    state: present
+    update_cache: yes
+
+# - name: Run PostgreSQL repository setup script
+#   command: /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh
+
+- name: Create directory for PostgreSQL keys
+  file:
+    path: /usr/share/postgresql-common/pgdg
+    state: directory
+    mode: '0755'
+
+- name: Download PostgreSQL GPG key
+  command: >
+    curl -o /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc --fail https://www.postgresql.org/media/keys/ACCC4CF8.asc
+
+- name: Add PostgreSQL repository
+  shell: |
+    echo "deb [signed-by=/usr/share/postgresql-common/pgdg/apt.postgresql.org.asc] https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
+
+- name: Update apt and install PostgreSQL (latest version)
+  apt:
+    name: postgresql
+    state: present
+    update_cache: yes
+
+- name: Enable and start PostgreSQL service
+  systemd:
+    name: postgresql
+    enabled: yes
+    state: started

Ansible/postgresql/tasks/install_postgresql_redhat.yml

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+---
+- name: Install PostgreSQL repository on Red Hat-based systems
+  yum:
+    name: "https://download.postgresql.org/pub/repos/yum/reporpms/EL-{{ ansible_distribution_major_version }}-x86_64/pgdg-redhat-repo-latest.noarch.rpm"
+    state: present
+
+- name: Disable default PostgreSQL module on Red Hat 8 or higher
+  when: ansible_distribution_major_version | int >= 8
+  shell: dnf -qy module disable postgresql
+
+- name: Install PostgreSQL server on Red Hat-based systems
+  yum:
+    name: "postgresql{{ postgresql_version }}-server"
+    state: present
+
+- name: Initialize PostgreSQL database on Red Hat-based systems
+  command: >
+    /usr/pgsql-{{ postgresql_version }}/bin/postgresql-{{ postgresql_version }}-setup initdb
+  when: ansible_distribution_major_version | int >= 7
+
+- name: Enable and start PostgreSQL service on Red Hat-based systems
+  systemd:
+    name: "postgresql-{{ postgresql_version }}"
+    enabled: yes
+    state: started
+
+- name: Enable PostgreSQL service for RHEL/CentOS 6
+  when: ansible_distribution_major_version | int == 6
+  service:
+    name: "postgresql-{{ postgresql_version }}"
+    enabled: yes
+    state: started