Update readmes for modules 1-3

Author: sidpalas

01-cloud-and-iac/README.md

@@ -1 +1,3 @@
+# 01 - Evolution of Cloud + Infrastructure as Code
+
 This module doesn't have any corresponding code.

02-overview/README.md

@@ -1,8 +1,22 @@
+## 02 - Overview + Setup
+
 ## Install Terraform
-1) install terraform
+
+Official installation instructions from HashiCorp: https://learn.hashicorp.com/tutorials/terraform/install-cli
 
 ## AWS Account Setup
-2) create non-root AWS user
-3) Add AmazonEC2FullAccess
-4) Save Access key + secret key (or use AWS CLI `aws configure` -- https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html)
 
+AWS Terraform provider documentation: https://registry.terraform.io/providers/hashicorp/aws/latest/docs#authentication
+
+1) create non-root AWS user
+2) Add the necessary IAM roles (e.g. AmazonEC2FullAccess)
+3) Save Access key + secret key (or use AWS CLI `aws configure` -- https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html)
+
+## Hello World
+
+`./main.tf` contains minimal configuration to provision an EC2 instance.
+
+1) `aws configure`
+2) `terraform init`
+3) `terraform plan`
+4) `terraform apply`

03-basics/README.md

@@ -1,4 +1,45 @@
-1) Create account credentials
+## 03 - Basics
 
+## Remote Backends
 
+Remote backends enable storage of TF state in a remote, location to enable secure collaboration.
 
+### Terraform Cloud
+
+https://www.terraform.io/cloud
+
+`./terraform-cloud-backend/main.tf`
+
+### AWS S3 + Dynamo DB
+
+Steps to initialize backend in AWS and manage it with Terraform:
+
+1) Use config from `./aws-backend/` (init, plan, apply) to provision s3 bucket and dynamoDB table with local state
+2) Uncomment the remote backend configuration
+3) Reinitialize with `terraform init`:
+
+```
+Do you want to copy existing state to the new backend?
+  Pre-existing state was found while migrating the previous "local" backend to the
+  newly configured "s3" backend. No existing state was found in the newly
+  configured "s3" backend. Do you want to copy this state to the new "s3"
+  backend? Enter "yes" to copy and "no" to start with an empty state.
+
+  Enter a value: yes 
+```
+
+Now the S3 bucket and dynamoDB table are mam and are able to be used as the state backend!
+
+## Web-App
+
+Generic web application architecture including:
+- EC2 instances
+- S3 bucket
+- RDS instance
+- Load balancer
+- Route 53 DNS config
+
+This example will be refined and improved in later modules.
+
+## Architecture
+![](./web-app/architecture.png)

03-basics/aws-backend/README.md

@@ -10,11 +10,11 @@ High level overview of the evolution of cloud computing and infrastructure as co
 
 This module does not have any corresponding code.
 
-## 02 - Overview
+## 02 - Overview + Setup
 
 Terraform overview and setup instructions.
 
-Includes super basic `hello world` terraform config to provision a single AWS EC2 instance.
+Includes basic `hello world` terraform config to provision a single AWS EC2 instance.
 
 ## 03 - Basics