nitanka

name: host mapping /etc/hosts of server
  hosts: <hostgroup>
  become: true
  tasks:
  - name: adding hostname mapping /etc/hosts
    lineinfile:
      dest: /etc/hosts
      insertbefore: '^127.0.0.1'
      line: '{{ item.0 }} {{ item.1 }}'
    with_together:

nitanka

- name: Installing HADOOP CLUSTER
  hosts: <hostgroup>
  become: yes 
  gather_facts: true
  tasks: 
  - name: Clearing the cache  
    shell: sync; echo 3 > /proc/sys/vm/drop_caches 

nitanka

---
- name: Creating a Volume
  hosts: localhost
  become: yes
  tasks: 
    - name: Creating a Volume
      ec2_vol:
        aws_access_key: "{{ lookup('env', 'AWS_ACCESS_KEY_ID') }}"
        aws_secret_key: "{{ lookup('env', 'AWS_SECRET_ACCESS_KEY') }}"
        instance: '<instance-id>'

nitanka

---
- name: creating an instance in AWS using default VPC and Security Group
  hosts: localhost
  vars:
    instance_info:
      - name: "< instance name >"
        image: "ami-835b4efa" # Ubuntu 14.04
        group_id: '<security-group>'
        region: '<region-name' #us-west-2, ap-northeast-1
        instance_type: '< instance type >' # t2.micro, mx.xlarge etc

nitanka

---
 - name: Creating new user
   user:
     name: <username>
     group: <groupname>
     state: present
     shell: /bin/bash #default shell 
     home: <path_to_home> #example /home/username
     #if we donot want home directory to be created,then use createhome: no
     password: "{{ lookup('env', 'PASSWD') }}" #set the password for the user

nitanka

---
- name: Changing ssh default port
  lineinfile:
    dest: /etc/ssh/sshd_config
    regexp: '^Port\s'
    state: present
    line: 'Port {{ubuntu_ssh_port}}' #give the port number you want to use
                                     #note we need to restart the ssh service
                                     #existing ssh connection will get disconnected
                                     

nitanka

- name: To set up internet gateway
  hosts: localhost
  tasks:
     - name: example nat group
       ec2_group:
         name: natsecuritygrp
         description: an example EC2 group
         #vpc_id: 12345
         region: eu-central-1
         ec2_access_key: "{{ lookup('env', 'AWS_ACCESS_KEY_ID') }}"

nitanka

---
- name: To set up internet gateway
  hosts: all
  tasks:
    - name: creating vpc
      ec2_vpc:
        region: ap-northeast-1
        state: present
        cidr_block: 20.0.0.0/16
        resource_tags: { "Name":"Test" }

nitanka

---
- hosts: 172.30.1.237
  name: Create subnet for database servers
  tasks:
    - name: Creating public subent 
      ec2_vpc_subnet:
        state: present
        cidr: 10.3.1.0/24
        resource_tags: { "Environment":"Dev", "Name":"public"}
        vpc_id: vpc-6c31ac09

nitanka

---
- hosts: localhost
  tasks:
    - ec2_vpc:
        state: present
        cidr_block: 10.3.0.0/16
        resource_tags: { "Environment":"Development" }
        region: ap-northeast-1
        state: present
        instance_tenancy: dedicated