This repo contains material to conduct a Terraform Workshop.

We run all of our terraform commands though docker.

• Install docker
• Run docker pull hashicorp/terraform to download terraform
• Create an AWS account, instuctions available here

All terraform commands can be run through docker using

docker run --rm -ti -v "$PWD:/app" -w "/app" hashicorp/terraform

Try running the below command to get help,

docker run --rm -ti -v "$PWD:/app" -w "/app" hashicorp/terraform --help

Alternatively, to make your life in a shell easier you can alias the command to terraform

alias terraform='docker run --rm -ti -v $PWD:/app -w /app hashicorp/terraform'

You can set this alias in your profile file to automatically run everytime you log into a shell.

Now run,

terraform --help

This is the typical execution cycle of an application managed by terraform

   +-----------+          +----------+
   | Plan      | -------> |  Apply   |
   +-----------+          +----------+
                            |     |
                            |     \------------\  +-----+
                            |                  |  |  *  |
                            V                  V  V     |
                      +-----------+           +--------------+              +---------------+
                      |  Create   | ------->  |   Upgrade    |  --------->  |  Destroy      |
                      +-----------+           +--------------+              +---------------+

terraform plan and terraform apply commands are used to mange the application infrastructure on the cloud.

• Ssh into public instance ssh -i ~/.ssh/[.pem file] ubuntu@[instance ip]
• Scp a file into an instance scp -i ~/.ssh/[.pem file] ./file(src) ubuntu@[instance ip]:/tmp/(dest)
• Scp a file from an instance scp -i ~/.ssh/[.pem file] ubuntu@[instance ip]:/tmp/(src) ./file(dest)

• iTerm2
• CIDR Wiki
• CIDR Calculator
• Packer