Creating two environment using roles with monolith application at two instanses:

• app-prod/app-stage - Ubuntu 16.04 (required for Ruby 2.3.8)
• db-prod/app-stage - Ubuntu 20.04

Used enviroment:

• Application code https://github.com/express42/reddit
• Ruby 2.3.8 (required by this version of the application)
• MongoDB 4.4
• Firewall rules to open ports:
  • 22 SSH connection
  • 9292 Application work port
  • 27017 Database connection
  • 80 HTTP port

Steps:

1. Create instances:

• Set terraform vars at ./terraform/prod/terraform.tfvars
  • Required: project, public_key_path, user_ssh
  • Optional: region, zone, machine_type

mv ./terraform/prod/terraform.tfvars.example ./terraform/prod/terraform.tfvars
cd terraform/prod
terraform apply -auto-approve

2. Configure Ansible:

• Read Ansible docs to add GCE service account key.
• Set service account JSON and project id at playbooks/dynamo.gcp.yml
• Set ssh private key path and ssh username at playbooks/ansible.cfg
• Install role jdauphant.nginx:

  ansible-galaxy install -r environments/stage/requirements.yml
  

3. Deploy:

ansible-playbook playbooks/site.yaml environments/stage/dynamo.gcp.yml
ansible-playbook playbooks/site.yaml environments/prod/dynamo.gcp.yml