Execute Script Install httpd and Edit a File

Updated Jan 04, 2021 ·

Overview

This lab practices common Ansible operations such as running scripts, installing httpd, and editing files on managed hosts.

Inventory

# Sample Inventory File

# Web Servers
sql_db1 ansible_host=sql01.xyz.com ansible_connection=ssh ansible_user=root ansible_ssh_pass=Lin$Pass
sql_db2 ansible_host=sql02.xyz.com ansible_connection=ssh ansible_user=root ansible_ssh_pass=Lin$Pass
web_node1 ansible_host=web01.xyz.com ansible_connection=ssh ansible_user=administrator ansible_ssh_pass=Win$Pass
web_node2 ansible_host=web02.xyz.com ansible_connection=ssh ansible_user=administrator ansible_ssh_pass=Win$Pass
web_node3 ansible_host=web03.xyz.com ansible_connection=ssh ansible_user=administrator ansible_ssh_pass=Win$Pass

[db_nodes]
sql_db1
sql_db2

[web_nodes]
web_node1
web_node2
web_node3

[all_nodes:children]
db_nodes
web_nodes

Task 1

Update the playbook with a play to Execute a script on all web server nodes.
The script is located at /tmp/install_script.sh
Use the Script module

Task 2

Add a new task to start httpd services on all web nodes
Use the Service module

Task 3

Add a new task in the beginning to add an entry into /etc/resolv.conf file for hosts.
The line to be added is nameserver 10.1.250.10
Note: The new task must be executed first, so place it accordingly.
Use the Lineinfile module

Task 4

Add a new task at second position to create a new web user.
Use the user module for this.
User details to be used are given below:
- Username: web_user
- uid: 1040
- group: developers

Solutions:

Solution 1

# Execute a script on all web server nodes.
---

- name: Execute a script on all web server nodes
  hosts: web_nodes
  tasks:
    - name: Execute scripts
      script: /tmp/install_script.sh
    

Solution 2

# Execute a script on all web server nodes.
---

- name: Execute a script on all web server nodes
  hosts: web_nodes
  tasks:
    - name: Execute script
      script: /tmp/install_script.sh
    
    - name: Start httpd
      service:
        name: httpd
        state: started

Solution 3

# Execute a script on all web server nodes.
---

- name: Execute a script on all web server nodes
  hosts: web_nodes
  tasks:
    - name: Add entry to /etc/resolv.conf
      lineinfile:
        line: 'nameserver 10.1.250.10'
        path: /etc/resolv.conf
        
    - name: Execute script
      script: /tmp/install_script.sh
    
    - name: Start httpd
      service:
        name: httpd
        state: present

Solution 4

# Execute a script on all web server nodes.
---

- name: Execute a script on all web server nodes
  hosts: web_nodes
  tasks:
    - name: Add entry to /etc/resolv.conf
      lineinfile:
        path: /etc/resolv.conf
        line: 'nameserver 10.1.250.10'
    
    - name: Add web user
      user:
        name: web_user
        uid: 1040
        group: developers
      
    - name: Execute script
      script: /tmp/install_script.sh
    
    - name: Start httpd
      service:
        name: httpd
        state: present

Overview​

Overview