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Creating Soft Links Using Ansible.md

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Problem Statement

The Nautilus DevOps team is practicing some of the Ansible modules and creating and testing different Ansible playbooks to accomplish tasks. Recently they started testing an Ansible file module to create soft links on all app servers. Below you can find more details about it.

  • Write a playbook.yml under /home/thor/ansible directory on jump host, an inventory file is already present under /home/thor/ansible directory on jump host itself. Using this playbook accomplish below given tasks:

  • Create an empty file /opt/dba/blog.txt on app server 1; its user owner and group owner should be tony. Create a symbolic link of source path /opt/dba to destination /var/www/html.

  • Create an empty file /opt/dba/story.txt on app server 2; its user owner and group owner should be steve. Create a symbolic link of source path /opt/dba to destination /var/www/html.

  • Create an empty file /opt/dba/media.txt on app server 3; its user owner and group owner should be banner. Create a symbolic link of source path /opt/dba to destination /var/www/html.

Note: Validation will try to run the playbook using command ansible-playbook -i inventory playbook.yml so please make sure playbook works this way without passing any extra arguments.

Solution

Step 1: Navigate to the Ansible Directory

  1. Open a terminal on the jump host.

  2. Change directory to /home/thor/ansible:

    cd /home/thor/ansible

Step 2: Create the Ansible Playbook

  1. Create a new file named playbook.yml:

    vi playbook.yml

  2. Add the following content to playbook.yml:

    ---
- hosts: all
  become: yes
  tasks:
    - name: Create an empty file on stapp01
      file:
        path: /opt/dba/blog.txt
        state: touch
        owner: tony
        group: tony
      when: inventory_hostname == 'stapp01'

    - name: Create an empty file on stapp02
      file:
        path: /opt/dba/story.txt
        state: touch
        owner: steve
        group: steve
      when: inventory_hostname == 'stapp02'

    - name: Create an empty file on stapp03
      file:
        path: /opt/dba/media.txt
        state: touch
        owner: banner
        group: banner
      when: inventory_hostname == 'stapp03'
    
    - name: Create a symbolic link on all the app_servers
      ansible.builtin.file:
        src: /opt/dba/
        dest: /var/www/html
        state: link

Step 3: Validate the Inventory File

Ensure the inventory file is correctly set up in /home/thor/ansible directory. It should contain:

stapp01 ansible_host=172.16.238.10 ansible_ssh_pass=Ir0nM@n ansible_user=tony
stapp02 ansible_host=172.16.238.11 ansible_ssh_pass=Am3ric@ ansible_user=steve
stapp03 ansible_host=172.16.238.12 ansible_ssh_pass=BigGr33n ansible_user=banner

Step 4: Run the Ansible Playbook

Execute the playbook using the ansible-playbook command:

ansible-playbook -i inventory playbook.yml

Expected Output


PLAY [all] ******************************************************************************

TASK [Gathering Facts] ******************************************************************
ok: [stapp03]
ok: [stapp01]
ok: [stapp02]

TASK [Create an empty file /opt/dba/blog.txt on stapp03] *****************************
skipping: [stapp02]
skipping: [stapp03]
changed: [stapp01]

TASK [Create an empty file /opt/dba/story.txt on stapp02] ****************************
skipping: [stapp01]
skipping: [stapp03]
changed: [stapp02]

TASK [Create an empty file /opt/dba/media.txt on stapp03] ****************************
skipping: [stapp01]
skipping: [stapp02]
changed: [stapp03]

TASK [Create a symbolic link on all the app_servers] ************************************
changed: [stapp02]
changed: [stapp01]
changed: [stapp03]

PLAY RECAP ******************************************************************************
stapp01                    : ok=3    changed=2    unreachable=0    failed=0    skipped=2    rescued=0    ignored=0
stapp02                    : ok=3    changed=2    unreachable=0    failed=0    skipped=2    rescued=0    ignored=0
stapp03                    : ok=3    changed=2    unreachable=0    failed=0    skipped=2    rescued=0    ignored=0