Add variables to README

README.md

@@ -9,3 +9,22 @@
 * Copy `terraform.tfvars.example` to `terraform.tfvars` and edit in appropriate values
 * Run `terraform init`
 * Run `terraform apply`
+
+# Variables
+
+| Variable             | Type         | Required | Default              | Description                                                     |
+| :---                 | :---         | :---     | :---                 | :---                                                            |
+| `user_name`          | string       | yes      |                      | OpenStack username                                              |
+| `user_domain_name`   | string       | no       | `uab`                | The login domain to use for the user                            |
+| `appcred_id`         | string       | yes      |                      | Application credential ID. Get one from the openstack dashboard |
+| `appcred_name`       | string       | yes      |                      | Name of the application credential                              |
+| `appcred_secret`     | string       | yes      |                      | Application credential secret                                   |
+| `ssh_keypair`        | string       | yes      |                      | ssh keypair name to use for authentication                      |
+| `base_image_name`    | string       | no       | `sles-15-sp2-x86_64` | Base image to use for all instances                             |
+| `osd_node_count`     | number       | no       | 3                    | Amount of OSD node(s) to provision                              |
+| `public_network_dns` | list(string) | no       | \["138.26.134.2"\]   | DNS to use for hosts                                            |
+| `sles_reg_code`      | string       | yes      |                      | SUSE Enterprise registration code                               |
+| `sles_reg_email`     | string       | yes      |                      | email for use with SUSE registration                            |
+| `sles_ses_reg`       | string       | yes      |                      | code to register for the storage package in SUSE                |
+| `osd_disk_sizes`     | list(number) | no       | \[8, 8\]             | Amount/size of disks to add, in GB                              |
+