8_aconditional.txt

install nginx on only redhat based system
-----------------------------------------
- name: playbok for automate script
  hosts: all
  become: true
  tasks:
  - name: copy from master to node
    yum:
      name: nginx
      state: present
    when: ansible_os_family == "RedHat"

-----------------------------------------------
create one ubuntu server one amaozn linux
-----------------------------------------
- name: playbok for automate script
  hosts: all
  become: true
  tasks:
  - name: install epel
    command: amazon-linux-extras install epel -y
    when: ansible_os_family == "RedHat"
  - name: copy from master to node
    yum:
      name: nginx
      state: present
    when: ansible_os_family == "RedHat"


it is going to install epel and nginx in amaozn linux2, and it will skip from ubuntu



ansible when condition for ubuntu
----------------------------------
- name: condition playbook
  hosts: all
  become: true
  tasks:
  - name: install nginx
    apt:
      name: nginx
      state: present
    when: ansible_os_family == "Debian"

-------------------------------------------------------------------------
install multiple packages on ansible by using loop
---------------------------------------------------
- name: condition playbook
  hosts: all
  become: true
  vars:
    packages:
    - name: nginx
      required: true
    - name: apache2
      required: true
  tasks:
  - name: install '{{packages}}'
    apt:
      name: '{{item.name}}'
      state: present
    loop: '{{packages}}'
    when: ansible_os_family == 'Debian'


-----------------------------------------------------------
register module
---------------
it used to capture system data
eg: service up or down,  system ip table status                                                                                  
target node should be linux

- name: condition playbook
  hosts: all
  become: true
  tasks:
    - name: my task
      command: cat /file
      register: result
    - name: create directory
      command: mkdir /created
      when: result.stdout.find('ashiq1') != -1

resister module example:
------------------------
create one linex machine an start aapche srever:

- name: condition playbook
  hosts: all
  become: true
  tasks:
    - name: my task
      command: systemctl status httpd
      register: result
      when: ansible_os_family == "RedHat"
    - name: create directory
      shell: echo "yes it is active" > /report
      when: result.stdout.find('active') != -1 and
      when: ansible_os_family == "RedHat"