Two tier Design Part 2 Install services

Updated Dec 08, 2020 ·

Overview

This lab continues the two-tier application build by installing and starting the services required by the web and load balancer hosts.

Diagram:

Here we'll be installing services on our webservers and loadbalancer.

webservers: Apache and PHP
loadbalancers: Apache

After installing the services, they would also need to be started.

For the playbook:

install-services.yml

# install-services.yml
---
# install-services.yml
---

- name: Install Apache on loadbalancer
  become: true
  hosts: loadbalancers
  tasks:
    - name: Install Apache on loadbalancer
      yum:  
        name: httpd
        state: present
    - name: Starts the service/s
      service:
        name: httpd
        state: started
        enabled: yes

- name: Install Apache and PHP on webservers
  become: true
  hosts: webservers
  tasks:
    - name: Install Apache and PHP on webservers
      yum:  
        name: 
          - httpd
          - php
        state: present
    - name: Starts the service/s
      service:
        name: httpd
        state: started
        enabled: yes      

To test,

$ ansible-playbook playbooks/install-services.yml

Now, as our playbooks get longer as we add more plays and tasks, it will be troublesome to check all the playbooks. One way to easily point out on which Nodes something went wrong or which part failed, is to check the play recap and summary once the playbook is done.

Overview​

Overview