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Terraform for Oracle Cloud Free Tier

Terraform project to create the VMs allowed by the Oracle Cloud Free Tier + Ansible post deployment automation

This repo will deploy:

  • default VCN with default subnet
  • default port 22 open
  • optional security groups for 443, wireguard
  • two VM.Standard.E2.1.Micro instances allowed by the Oracle free tier. (no need to have billing account)
  • one VM.Standard.A1.Flex with 24GB RAM, 4 OCPUs allowed by the Oracle free tier.

All you need is an empty account.

Steps to deploy

Step 1. Create API key

# if you want the password protected key
openssl genrsa -out ~/.ssh/not_ssh_oci_api_key.pem -aes128 2048                    
# if you want the non-password protected key
#openssl genrsa -out ~/.ssh/not_ssh_oci_api_key.pem 2048
chmod go-rwx ~/.ssh/not_ssh_oci_api_key.pem
openssl rsa -pubout -in ~/.ssh/not_ssh_oci_api_key.pem -out ~/.ssh/not_ssh_oci_api_key_public.pem

Or follow here: https://docs.oracle.com/en-us/iaas/Content/API/Concepts/apisigningkey.htm

NOTE: Remember your user, tenancy and region , they will need to go into terraform variables.

Note: availability_domain == tenancy-ocid == compartment_id.

It will save you time I wasted to understand that.

Step 2. Add your variables

Create a variables.tf file with the necessary information as follow:

locals {
  availability_domain  = "ocid1.tenancy.oc..... CHANGEME"
  # this one you can keep
  ubuntu2204ocid       = "ocid1.image.oc1.eu-stockholm-1.aaaaaaaaueqwi7bpc5teyemjxum2eqsy566w4cam3jjsdcgakbwi6zanzwia"
  user_ocid            = "ocid1.user.CHANGEME"
  fingerprint          = "CHANGEME"
  private_api_key_path = pathexpand("~/CHANGEME")
  region               = "CHANGEME"
  ssh_pubkey_path      = pathexpand("~/.ssh/CHANGEME")
  ssh_pubkey_data      = file(pathexpand("~/.ssh/CHANGEME"))
}

You can also see your availability_domain from: https://cloud.oracle.com/tenancy under OCID.

More info on how to gather these ids: https://docs.oracle.com/en-us/iaas/developer-tutorials/tutorials/tf-compute/01-summary.htm

Step 3. Deploy

terraform init -upgrade
terraform plan
terraform apply

At the end, terraform will generate an ansible inventory file ready for use in ./ansible

Want to store terraform state on the cloud bucket?

Uncomment state.tf.bak to state.tf and follow instructions within to enable proper access.

Copy the secret key, then click on the generated secret and copy the key id. Create a profile then.

You need to generate "customer secret keys" from the portal and create a "[oracle]" profile in ~/.aws/credentials OR use env variables.

Note

20GB of storage buckets are free.

Post deployment?

cd ansible && ansible-playbook playbook.yml

Have fun!

WIP - In case you want to export current setup?

.terraform/providers/registry.terraform.io/oracle/oci/5.3.0/linux_amd64/terraform-provider-oci_v5.3.0 -command export -compartment_id="ocid1.tenancyCHANGEME" -output_path=./export