Provisioning EC2 Instances using Ansible 2.0.

Posted By : Ankit Arora | 25-Sep-2017

Ansible AWS

Provisioning EC2 Instances using Ansible 2.0.

Ansible is a great tool to provision EC2 instances. Ansible provisioning gives us the power to automate

or perform tasks easily on AWS architecture.

Requirements:

Python boto
Ansible 2.0

Set up AWS access & secret keys in the ~/.boto file. If file is not present then create it.

Now writing host file:



[local]

localhost


[testserver]

Now writing ec2-playbook.yml to perform task:



---   

  - name: Provisioning an EC2 Instance

 
    hosts: local

 
    connection: local 

 
    gather_facts: False  # For making provisioning faster.

 
    tags: provision

 
    # Below are the variables for creating/provisioning the EC2 Instance

 
    vars:

 
      instance_type: t1.micro

 
      security_group: testserver # Change the security group name here

 
      image: ami-98aa1cf0 # Change the AMI, from which you want to launch the server

 
      region: us-east-1 # Change the Region

 
      keypair: ansible # Change the keypair name

 
      count: 2 # This will create 2 servers.

 
 

 
    # Task that will be used to Launch/Create an EC2 Instance

 
    tasks:

 
      - name: Create a security group

 
        local_action: 

 
          module: ec2_group

 
          name: "{{ security_group }}"

 
          description: Security Group for webserver Servers

 
          region: "{{ region }}"

 
          rules:

 
            - proto: tcp

 
              type: ssh

 
              from_port: 22

 
              to_port: 22

 
              cidr_ip: 0.0.0.0/0

 
            - proto: tcp

 
              from_port: 80

 
              to_port: 80

 
              cidr_ip: 0.0.0.0/0

 
          rules_egress:

 
            - proto: all

 
              type: all

 
              cidr_ip: 0.0.0.0/0

 
 

 
 

 
      - name: Launching the new EC2 Instance

 
        local_action: ec2 

 
                      group={{ security_group }} 

 
                      instance_type={{ instance_type}} 

 
                      image={{ image }} 

 
                      wait=true 

 
                      region={{ region }} 

 
                      keypair={{ keypair }}

 
                      count={{count}}

 
        register: ec2

 
 

 
      - name: Add the newly created EC2 instance(s) to the local host group (located inside the directory)

 
        local_action: lineinfile 

 
                      dest="./hosts" 

 
                      regexp={{ item.public_ip }} 

 
                      insertafter="[webserver]" line={{ item.public_ip }}

 

        with_items: "{{ ec2.instances }}" 

 
       - name: Wait for SSH to come up

 
        local_action: wait_for 

 
                      host={{ item.public_ip }} 

 
                      port=22 

 
                      state=started

 
        with_items: "{{ ec2.instances }}"

 
 

 
      - name: Add tag to Instance(s)

 
        local_action: ec2_tag resource={{ item.id }} region={{ region }} state=present

 
        with_items: "{{ ec2.instances }}"

 
        args:

 
          tags:

 
            Name: testserver

Now spinning up the instances using: