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Category: terraform

Provisioning EC2 key pairs with terraform.

In the previous example, we created an EC2 instance, which we wouldn’t be able to access, that is because we neither provisioned a new key pair nor used existing one, which we could see from the state report:

➜  terraform_demo grep key_name terraform.tfstate
                            "key_name": "",
➜  terraform_demo

As you can see key_name is empty.

Now, if you already have a key pair which you are using to connect to your instance, which you will find
in EC2 Dashboard, NETWORK & SECURITY – Key Pairs:

then we can specify it in aws_instance section so EC2 can be accessed with that key:

resource "aws_instance" "ubuntu_zesty" {
  ami           = "ami-6b7f610f"
  instance_type = "t2.micro"
  key_name = "myec2key"
}

Let’s create an instance:

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Spinning up an EC2 with Terraform and Vault.

Today we will look at how to setup EC2 instance with Terraform.

  1. Set up Terraform
  2. Spin up EC2
  3. Externalise secrets and other resources with terraform variables.
  4. Set up Vault as secret repo

1. Set up Terraform

So first thing first, quick installation guide, visit https://www.terraform.io/downloads.html , pick up right version and download:

➜  apps wget https://releases.hashicorp.com/terraform/0.11.1/terraform_0.11.1_darwin_amd64.zip\?_ga\=2.1738614.654909398.1512400028-228831855.1511115744
--2017-12-04 15:16:06--  https://releases.hashicorp.com/terraform/0.11.1/terraform_0.11.1_darwin_amd64.zip?_ga=2.1738614.654909398.1512400028-228831855.1511115744
Resolving releases.hashicorp.com... 151.101.17.183, 2a04:4e42:4::439
Connecting to releases.hashicorp.com|151.101.17.183|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 15750266 (15M) [application/zip]
Saving to: ‘terraform_0.11.1_darwin_amd64.zip?_ga=2.1738614.654909398.1512400028-228831855.1511115744’

terraform_0.11.1_darwin_amd64.zip?_ga=2.17386 100%[=================================================================================================>]  15.02M   499KB/s    in 30s

2017-12-04 15:16:36 (517 KB/s) - ‘terraform_0.11.1_darwin_amd64.zip?_ga=2.1738614.654909398.1512400028-228831855.1511115744’ saved [15750266/15750266]

Then unzip:

➜  apps unzip terraform_0.11.1_darwin_amd64.zip\?_ga=2.1738614.654909398.1512400028-228831855.1511115744
Archive:  terraform_0.11.1_darwin_amd64.zip?_ga=2.1738614.654909398.1512400028-228831855.1511115744
  inflating: terraform

Finally make sure location added to PATH:

➜  ~ export PATH=~/apps:$PATH

Check installation works:

➜  ~ terraform -v
Terraform v0.11.1

2. Spin up EC2

The plan is to spin up latest Ubuntu.

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