update readme

README.md

@@ -1,19 +1,119 @@
 # ScyllaDB 1 million operations/second DEMOs
 
-Set up 1 million operations/second DEMO with different flavours of ScyllaDB:
-* [1 million operations/second with ScyllaDB Cloud](/scylladb-cloud)
-* [1 million operations/second with ScyllaDB Enterprise](/scylladb-enterprise)
+This repository contains Terraform and Ansible based projects to help you
+set up DEMOs and POCs with ScyllaDB in a cloud environment.
 
-Scale a cluster from 3 to 6 nodes with Tablets enabled:
-* [ScyllaDB Tablets DEMO on AWS](/tablets-scaling)
+Currently supported DEMOs:
+* [ScyllaDB Cloud 1 million operations/second (AWS and ScyllaDB Cloud account needed)](/scylladb-cloud)
+* [ScyllaDB Enterprise 1 million operations/second (AWS account needed)](/scylladb-enterprise)
+* [Scaling from 3 to 6 nodes (AWS account needed))](/tablets-scaling)
+
+
+## Prerequisites
+* [Terraform](https://developer.hashicorp.com/terraform/install)
+* [Python 3](https://www.python.org/downloads/)
+* [NodeJS](https://nodejs.org/en/download)
+* [AWS CLI](https://aws.amazon.com/cli/) and [ScyllaDB Cloud API key](https://cloud.scylladb.com/)
 
 ## Usage
 1. Clone the repository
     ```
     git clone https://github.com/scylladb/1m-ops-demo.git
     ```
-1. Open a folder and follow the instructions in the corresponding readme.
+1. Open the DEMO folder that you want to run (e.g. for ScyllaDB Cloud 1M ops/sec demo):
+    ```
+    cd scylladb-cloud
+    ```
+1. Edit the `variables.tf` file, for example:
+    ```terraform
+    # ScyllaDB Cloud API token
+    variable "scylla_cloud_token" {
+    description = "ScyllaDB Cloud API token"
+    type        = string
+    default     = "YOUR-API-TOKEN"
+    }
+
+    # ScyllaDB Cloud region
+    variable "scylla_cloud_region" {
+    description = "ScyllaDB Cloud region of the cluster"
+    type        = string
+    default     = "us-east-1"
+    }
+
+    # SSH private key for EC2 instance access
+    variable "ssh_private_key" {
+    description = "SSH private key location for EC2 instance access"
+    type        = string
+    default     = "key.pem"
+    }
+
+    variable "aws_key_pair" {
+    description = "Key pair name in AWS"
+    type        = string
+    default     = "my-key-pair"
+    }
+
+    # AWS credentials file
+    variable "aws_creds" {
+    description = "AWS credentials location"
+    type        = string
+    default     = "/home/user/.aws/credentials"
+    }
+
+    # AWS Profile to Use
+    variable "aws_profile" {
+    description = "AWS Profile to Use"
+    type        = string
+    default     = "DeveloperAccessRole"
+    }
+    ```
+1. Run Terraform
+
+    Initialize Terraform project:
+    ```
+    terraform init
+    ```
+    Review infrastrcuture that Terraform is planning to build out:
+    ```
+    terraform plan
+    ```
+    Finally, start Terraform:
+    ```
+    terraform apply
+    ```
+    Wait for Terraform to finish setting up
+1. Install DEMO UI application dependencies
+
+    Make sure your are in the root folder.
+    
+    Install backend dependencies (virtual environment is recommended):
+    ```bash
+    virtualenv env && source env/bin/activate && pip install -r requirements.txt
+    ```
+
+    Install frontend dependencies (use `npm` or `yarn`):
+    ```bash
+    cd frontend
+    npm install
+    ```
+1. Run DEMO UI application
+    
+    Start backend
+    ```bash
+    python app.py
+    ```
+
+    Start frontend
+    ```bash
+    cd frontend
+    npm run dev 
+    ```
+1. Open DEMO UI application
+    
+    Go to http://localhost:5173
+    ![demo ui](/docs/source/_static/img/demo_ui.png)
+1. Click through the scenarios one by one.
+
 
 ## Relevant links
-* [ScyllaDB Open Source docs](https://opensource.docs.scylladb.com/stable/)
-* [ScyllaDB Enterprise docs](https://enterprise.docs.scylladb.com)
+* [ScyllaDB docs](https://docs.scylladb.com/stable/)