README.md

terraform_privisioning

This folder contains terraform scripts to manage openstack configurations
These require a clouds.yaml in ~/.config/openstack/ to provide authentication

The scripts require the terraform package to be installed
- To install terraform on ubuntu or any ubuntu derivative with snap installed:

snap install terraform --classic

If you are confused please find further info here
To actually run the script, start by entering the directory of the script you want to run, e.g.:

cd load_balancing_application

Then generate a plan, this will also tell you what actions terraform will perform:
- Note this will generate a plan file in the current directory

terraform plan -out plan --var-file=vars.tfvars

terraform apply plan

terraform destroy --var-file=vars.tfvars

This terraform script creates a private network with a subnet domain of 10.0.0.x
It also adds a router to connect the private network to the external network
You must provide a external_network_id to connect to router to
The script must be run with --var-file=vars.tfvars to pass through the required variables

This terraform script creates a private network and sets up two pools along with a load balancer
In one of the pools ssh traffic will be directed to a bastion vm to access the application vm's
The other pool contains the application vm's which the load balancer can pick from
A private key is created in the script and then passed into the bastion vm to provide access to the application vm's
You must provide:
- A external_network_id to connect to router to
- A floating IP for the load balancer in order to connect to the vm's and bastion
- A image name for the bastion and web vm's
- A flavour name for the bastion and web vm's also
- A key pair to place on the bastion vm in order for you to access it
- The number of instances of the web vm to be created in order for effective load balancing
Note you must use the ssh jumphost to access an application vm