# Ansible Playbooks
[toc]

#### 1. ping.yaml

vi ping.yaml

Put the following content in the file:

--- ## Using playbook to run ping on all nodes
- hosts: all
  remote_user: ansible
  become: yes
  tasks: 
    - name: Ping all nodes
      action: ping


Run the playbook via the following command:

ansible-playbook ping.yaml

#### 2. elinks.yml

--- # Basic play to install a package
- hosts: nodes
  become: yes
  tasks:
    - name: install elinks
      yum:
        name: elinks
        state: latest

#### 3. vars.yaml

---
- hosts: '{{ myhosts }}'
  become: yes
  tasks:
  - name: Install below mentioned software on above mentioned nodes
    apt:
      name: '{{ pkg }}'
      state: latest

:mag: Run above playbook using the following command:

$ ansible-playbook vars.yaml --extra-vars "myhosts=nodes pkg=telnet"
or
$ ansible-playbook vars.yaml -e "myhosts=nodes pkg=telnet"

#### 4. user.yaml

---
- name: create user sk12k
  hosts: all

  tasks:
  - name: Create users
    user:
      name: sk12k
      home: /home/sk12k
      shell: /bin/bash

#### 5. loop.yaml

--- ## Using loop to create 
- name: create user
  hosts: nodes
  become: yes
  tasks:
  - name: create multiple users listed
    user:
      name: "{{item}}"
      state: present
    loop:
    - sk12k
    - saif
    - hari
    - juarez
    - dani

## Play to install multiple packages
- name: install packages
  hosts: nodes
  become: yes
  tasks:
    - name: install packages mentioned below
      apt:
        name: "{{item}}"
        state: latest
      loop:
      - tree
      - git
      - elinks
      - telnet

#### 6. handlers.yaml

--- ## Playbook to show how handlers work in Ansible
- name: install and configure apache
  hosts: nodes
  become: yes
  tasks: 
    - name: install apache2 ## Apache installation
      apt:
        name: apache2
        state: latest
        update_cache: yes

    - name: Upload index file ## Index.html page copied from controller to all webservers
      copy:
        src: index.html
        dest: /var/www/html/index.html
        mode: 0755
      notify: restart apache2

handlers:
    - name: restart apache2 ## Make sure the service is running
      service:
        name: apache2
        state: restarted

#### 7. get_url.yaml

--- ## use get_url module to download tomcat package from Apache portal
- name: Download Tomcat from tomcat.apache.org
  hosts: nodes
  become: yes
  tasks:
    - name: Create a directory for Tomcat
      file:
        path: /tmp/tomcat
        state: directory

    - name: Download tomcat
      get_url:
        url: https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.83/bin/apache-tomcat-8.5.83.tar.gz
        dest: /tmp/tomcat
        mode: '0755'
        group: sk12k
        owner: sk12k
    

#### facts.yaml

--- ## Playbook to take action based on ansible facts
- name: using facts
  hosts: nodes
  become: yes
  tasks:
    - name: worker1 folder
      ansible.builtin.command: mkdir /tmp/worker1
      when: ansible_facts['hostname'] == "ip-172-31-57-187"

    - name: folder on worker2
      ansible.builtin.command: mkdir /tmp/worker2
      when: ansible_facts['hostname'] == "ip-172-31-49-9"

#### apache_conditional.yaml

--- ## Playbook to install apache on both Debian and Redhat systems
- name: Install apache
  hosts: nodes
  become: yes
  tasks:
    - name: Apache on Debian
      when: ansible_facts['os_family'] == "Debian"
      ansible.builtin.package:
        name: apache2
        state: present

    - name: Apache on Redhat
      when: ansible_facts['os_family'] == "RedHat"
      ansible.builtin.package:
        name: httpd
        state: present

#### NodeJS installation using Ansible Playbook

--- ## Install NodeJS using Ansible Playbook
- name: install nodejs
  hosts: nodes
  gather_facts: True
  become: true
  tasks:
   - name: add apt key for nodesource
     apt_key: url=https://deb.nodesource.com/gpgkey/nodesource.gpg.key
   - name: add repo for nodesource
     apt_repository:
      repo: 'deb https://deb.nodesource.com/node_0.10 {{ ansible_distribution_release }} main'
      update_cache: no
   - name: install nodejs
     apt: name=nodejs