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Create Ansible Inventory for App Server Testing.md

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Problem Statement

The Nautilus DevOps team is testing Ansible playbooks on various servers within their stack. They've placed some playbooks under /home/thor/playbook/ directory on the jump host and now intend to test them on app server 3 in Stratos DC. However, an inventory file needs creation for Ansible to connect to the respective app. Here are the requirements:

  • a. Create an ini type Ansible inventory file _/home/thor/playbook/inventory_on jump host.

  • b. Include App Server 3 in this inventory along with necessary variables for proper functionality.

  • c. Ensure the inventory hostname corresponds to the server name as per the wiki, for example stapp01 for app server 1 in Stratos DC.

Note: Validation will execute the playbook using the command ansible-playbook -i inventory playbook.yml. Ensure the playbook functions properly without any extra arguments.

Solution

1. Create the Inventory File

# Use a text editor to create or edit the inventory file
vi /home/thor/playbook/inventory

Add the following content to the file:

# /home/thor/playbook/inventory
[app_servers]
stapp03 ansible_host=172.16.238.12 ansible_user=banner ansible_ssh_pass=BigGr33n

2. Verify the Playbook

The provided playbook.yml is used to install and start the httpd service. Ensure that the playbook syntax and indentation are correct.

# /home/thor/playbook/playbook.yml
---
- hosts: all
  become: yes
  become_user: root
  tasks:
    - name: Install httpd package
      yum:
        name: httpd
        state: installed

    - name: Start service httpd
      service:
        name: httpd
        state: started

3. Test the Playbook Execution

Run the playbook to ensure everything is working as expected:

ansible-playbook -i inventory playbook.yml

Final Validation

Make sure that after executing the playbook, the following output is produced:

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

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

TASK [Install httpd package] ************************************************************
changed: [stapp03]

TASK [Start service httpd] **************************************************************
changed: [stapp03]

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