Solution for exam added.

module2/final_exam/exam-playbook/main.yml

@@ -0,0 +1,11 @@
+---
+- hosts: nodepgs
+  become: yes
+  tasks: 
+    - import_tasks: tasks/setup_grub.yml
+      vars:
+        grub_timeout: 1
+    - import_tasks: tasks/install_selinux.yml
+    - import_tasks: tasks/setup_raid1_for_postgres.yml
+    - import_tasks: tasks/install_postgres.yml
+    - import_tasks: tasks/setup_weather_db.yml

module2/final_exam/exam-playbook/tasks/install_postgres.yml

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+- name: Install gnupg
+  apt:
+    pkg: gnupg
+
+- name: Install key
+  apt_key:
+    url: https://www.postgresql.org/media/keys/ACCC4CF8.asc
+    state: present
+
+- name: Add postgresql repository into sources list as pgdg file
+  ansible.builtin.apt_repository:
+    repo: "deb http://apt.postgresql.org/pub/repos/apt {{ ansible_distribution_release }}-pgdg main" 
+    state: present
+    filename: pgdg
+
+- name: Install postgre
+  apt:
+    pkg: postgresql-15*
+  register: postgre_installation
+
+- name: Delete old configuration
+  shell: rm -rf /var/lib/postgresql/*
+  when: postgre_installation.changed
+
+- name: Init PostgreSQL
+  shell: pg_createcluster 15 main --start
+  when: postgre_installation.changed

module2/final_exam/exam-playbook/tasks/install_selinux.yml

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+- name: 'Install SELinux'
+  apt:
+    pkg:
+      - selinux-basics
+      - selinux-policy-default
+      - auditd
+    state: present
+
+- name: 'Activate SELinux'
+  shell: selinux-activate
+  when: ansible_selinux.status == "disabled"
+
+- name: 'Reboot after SElLinux install'
+  reboot:
+  when: ansible_selinux.status == "disabled"
+  
+- name: 'Check SELinux in permissive mode'
+  ansible.posix.selinux:
+    policy: default
+    state: permissive  

module2/final_exam/exam-playbook/tasks/setup_grub.yml

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+- name: "Get grub timeout value"
+  shell: cat /etc/default/grub | grep GRUB_TIMEOUT | sed 's/GRUB_TIMEOUT=//g'
+  register: current_grub_timeout
+
+- name: 'Configure grub timeout if not already'
+  shell: sed 's/^GRUB_TIMEOUT=.*/GRUB_TIMEOUT={{ timeout }}/g' -i /etc/default/grub
+  when: current_grub_timeout.stdout != "{{ grub_timeout }}"
+  
+- name: 'Update grub'
+  shell: update-grub
+  when: current_grub_timeout.stdout != "{{ grub_timeout }}"

module2/final_exam/exam-playbook/tasks/setup_raid1_for_postgres.yml

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+- name: 'Install mdadm'
+  apt: 
+    pkg: mdadm
+
+- name: 'Check raid 1 has mount point at /var/lib/postgresql'
+  command: /bin/mountpoint -q /var/lib/postgresql/
+  register: raid1_mounted
+  failed_when: False
+
+- name: 'Configure md raid 1'
+  shell: mdadm --create /dev/md0 --raid-devices=2 --level=1 /dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi[1,2] --run
+  register: "array_created"
+  when: ansible_facts['devices']['md0'] is undefined and
+        raid1_mounted.rc == 1
+
+- name: 'Get configuration strings for configured raids'
+  command: "mdadm --detail --scan"
+  register: array_details
+  changed_when: false
+
+- name: 'Persist configuration in /etc/mdadm/mdadm.conf '
+  lineinfile:
+    dest: "/etc/mdadm/mdadm.conf"
+    regexp: "^{{ item }}"
+    line: "{{ item }}"
+    state: "present"
+  with_items: '{{ array_details.stdout_lines }}'
+  when: array_created.changed
+  register: updated_mdadm_conf
+
+- name: 'Updating Initramfs'
+  command: update-initramfs -u
+  when: updated_mdadm_conf is defined and
+        updated_mdadm_conf.changed
+
+- name: 'Format raid1, ext4 filesystem'
+  community.general.filesystem:
+    fstype: ext4
+    dev: /dev/md0
+
+- name: 'Update facts about node.'
+  setup:
+
+- name: 'Create postrgresql folder'
+  file:
+    path: /var/lib/postgresql
+    state: directory
+
+- name: 'Setup permanent mountpoint /var/lib/postgresql for raid1'
+  ansible.posix.mount:
+    path: /var/lib/postgresql
+    src: UUID={{ ansible_facts['devices']['md0']['links']['uuids'][0] }}
+    fstype: ext4
+    state: present
+  register: permanent_raid1_mount
+    
+- name: reboot 
+  reboot:
+  when: permanent_raid1_mount.changed

module2/final_exam/exam-playbook/tasks/setup_weather_db.yml

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+- name: Copy weather.sql
+  copy:
+    src: ./files/weather.sql
+    dest: /tmp/weather.sql
+    
+- name: import wether db to pg
+  shell: sudo -u postgres psql -f /tmp/weather.sql