Lab 002: Ansible Install Package

Requirements

The Nautilus Application development team wanted to test some applications on app servers in Stratos Datacenter. They shared some pre-requisites with the DevOps team, and packages need to be installed on app servers. Since we are already using Ansible for automating such tasks, please perform this task using Ansible as per details mentioned below:

• Create an inventory file /home/thor/playbook/inventory on jump host and add all app servers in it.

• Create an Ansible playbook /home/thor/playbook/playbook.yml to install httpd package on all app servers using Ansible yum module.

• Make sure user thor should be able to run the playbook on jump host.

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

CheckCompleteIncompleteTry Later

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Steps

On the jump host, create the inventory file. For the server credentials, check out the Project Nautilus documentation.

cd /home/thor/playbook/ 

$ cat > inventory 

## /home/thor/playbook/inventory 
[app_servers]
app_server1 ansible_host=172.16.238.10  ansible_user=tony   ansible_ssh_pass=******    ansible_pkg_mgr=yum
app_server2 ansible_host=172.16.238.11  ansible_user=steve  ansible_ssh_pass=******    ansible_pkg_mgr=yum
app_server3 ansible_host=172.16.238.12  ansible_user=banner ansible_ssh_pass=******    ansible_pkg_mgr=yum

Run a simple ping test. Each app server should return a pong.

thor@jump_host ~/playbook$ ansible -m ping all -i inventory 
app_server1 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/libexec/platform-python"
    }, 
    "changed": false, 
    "ping": "pong"
}
app_server2 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/libexec/platform-python"
    }, 
    "changed": false, 
    "ping": "pong"
}
app_server3 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/libexec/platform-python"
    }, 
    "changed": false, 
    "ping": "pong"
}  

Create the playbook.yml.

$ cat > playbook.yml

---
- name: Install httpd package on app servers
  hosts: app_servers
  become: true  # To run tasks as sudo/root
  tasks:
    - name: Install httpd package
      yum:
        name: httpd
        state: present  # This line should be separate from the "name" parameter

Run the playbook.

ansible-playbook -i inventory playbook.yml 

thor@jump_host ~/playbook$ ansible-playbook -i inventory playbook.yml 

PLAY [Install httpd package on app servers] **************************************************************

TASK [Gathering Facts] ***********************************************************************************
ok: [app_server2]
ok: [app_server1]
ok: [app_server3]

TASK [Install httpd package] *****************************************************************************
changed: [app_server3]
changed: [app_server1]
changed: [app_server2]

PLAY RECAP ***********************************************************************************************
app_server1                : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
app_server2                : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
app_server3                : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

To verify,

ansible all -a "sudo systemctl status httpd" -i inventory 

It should return:

app_server1 | FAILED | rc=3 >>
* httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:httpd.service(8)

app_server2 | FAILED | rc=3 >>
* httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:httpd.service(8)

app_server3 | FAILED | rc=3 >>
* httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:httpd.service(8)            

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