Provision EC2 instance in AWS using Terraform - Create Terraform files for provisioning resources on AWS

Terraform can provision resources on any cloud platform. We will see how you can use Terraform to provision EC2 instance.

1. Login to AWS console, click on username and go to My security credentials. 2. Continue on security credentials, click on access keys 3. Create a new access key if you don't have one. Make sure you download the keys.

4. create aws.tf file with below content. make sure you update with your Access key and secret keys.
replace red marked with keys you received from step # 3 above.
sudo vi aws.tf

provider "aws" {

access_key = "xx"
  secret_key = "xx"
  region     = "us-east-2"
}

Now execute the below command:

terraform init

the above command should load the AWS plug-ins.

sudo vi create_ec2.tf

copy the below code in yellow color:

resource "aws_instance" "myFirstInstance" {
  ami           = "ami-916f59f4"

  key_name = "my_key"
  instance_type = "t2.micro"
  security_groups= [ "security_jenkins_grp"]

  tags= {
    Name = "jenkins_instance"
  }

}

resource "aws_security_group" "security_jenkins_grp" {
  name        = "security_jenkins_grp"
  description = "security group for jenkins"

  ingress {
    from_port   = 8080
    to_port     = 8080
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

 ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

 # outbound from jenkis server
  egress {
    from_port   = 0
    to_port     = 65535
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  tags= {
    Name = "security_jenkins_grp"
  }
}

terraform plan

the above command will show you what Terraform is going to do..

terraform apply

type yes

Now login to EC2 console to see newly provisioned EC2 instance.

Install Docker from Ubuntu Repositories

You can install Docker from Ubuntu repositories.

sudo apt-get update 
sudo apt-get install -y docker.io
Docker —version
Docker version 1.13.1, build 092cba3

sudo docker run hello-world

 

How to make sure if Puppet agent does pull from master after configuration change?

How to make sure if Puppet agent does pull from master after configuration change?

Login to Puppet Agent node
Remove apache first..

1. sudo apt-get remove apache2 -y

2. Make sure apache is not running by going to browser running public dns name. Once verified,

3. edit the below file

sudo vi /etc/puppetlabs/puppet/puppet.conf

#Add below entry
runinterval = 120

4. Now stop the agent

sudo systemctl stop puppet

5. start puppet agent again

sudo systemctl start puppet

Now after 2 mins Apache will be installed on the Agent and you will be able to see the Apache web page in the browser