Regenerate code with READMEs

Author: brikis98

code/bash/01-why-terraform/README.md

@@ -0,0 +1,17 @@
+# setup-webserver.sh
+
+This folder contains an example of a Bash script that can be used to install and Apache, PHP, and a sample PHP app
+on an Ubuntu server. 
+
+For more info, please see Chapter 1, "Why Terraform", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+This script should be run on an Ubuntu server. 
+
+## Quick start
+
+```
+./setup-webserver.sh
+```

code/bash/02-intro-to-terraform-syntax/README.md

@@ -0,0 +1,18 @@
+# run-webserver.sh
+
+This folder contains an example of a Bash script that can be used to start a web server that listens on port 8080
+and returns the text "Hello, World" for the URL `/`. 
+
+For more info, please see Chapter 2, "An Introduction to Terraform Syntax", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+You must have [busybox](https://busybox.net/) installed on your computer. 
+
+## Quick start
+
+```
+./run-webserver.sh
+curl http://localhost:8080
+```

code/bash/03-terraform-state/README.md

@@ -0,0 +1,19 @@
+# bash-unit-test-example.sh
+
+This folder shows how extracting your [User Data 
+script](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html) into a separate file allows you to write 
+unit tests for that file. The folder contains a sample `user-data.sh` Bash script, which fires up a web server on port
+8080, plus a simple unit test for it, `bash-unit-test-example.sh`, that runs that server and checks that it works.
+
+For more info, please see Chapter 3, "How to Manage Terraform State", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+You must have [busybox](https://busybox.net/) installed on your computer. 
+
+## Quick start
+
+```
+./bash-unit-test-example.sh
+```

code/bash/03-terraform-state/bash-unit-test-example.sh

@@ -8,6 +8,8 @@ export server_port=8888
 
 output=$(curl "http://localhost:$server_port")
 
-if [[ $output != *"Hello, World"* ]]; then
-  echo "Did not get back expected text 'Hello, World'"
+if [[ $output == *"Hello, World"* ]]; then
+  echo "Success! Got expected text from server."
+else
+  echo "Error. Did not get back expected text 'Hello, World'."
 fi

code/packer/01-why-terraform/README.md

@@ -0,0 +1,34 @@
+# Packer example
+
+This folder shows an example [Packer](https://www.packer.io/) template that can be used to create an [Amazon Machine
+Image (AMI)](http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AMIs.html) of an Ubuntu server with Apache, PHP, and
+a sample PHP app installed.
+
+For more info, please see Chapter 1, "Why Terraform", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+* You must have [Packer](https://www.packer.io/) installed on your computer. 
+* You must have an [Amazon Web Services (AWS) account](http://aws.amazon.com/).
+
+## Quick start
+
+**Please note that this example will deploy real resources into your AWS account. We have made every effort to ensure 
+all the resources qualify for the [AWS Free Tier](https://aws.amazon.com/free/), but we are not responsible for any
+charges you may incur.** 
+
+Configure your [AWS access 
+keys](http://docs.aws.amazon.com/general/latest/gr/aws-sec-cred-types.html#access-keys-and-secret-access-keys) as 
+environment variables:
+
+```
+export AWS_ACCESS_KEY_ID=(your access key id)
+export AWS_SECRET_ACCESS_KEY=(your secret access key)
+```
+
+To build the AMI:
+
+```
+packer build webserver.json
+```

code/ruby/06-terraform-team/README.md

@@ -0,0 +1,48 @@
+# Terraform automated test example
+
+This folder shows an example of how to write automated tests for a web server cluster defined in 
+[Terraform](https://www.terraform.io/) templates. The folder contains a Ruby script, `terraform-test.rb`, that will 
+apply your Terraform templates and then test the web server cluster URL to make sure it returns "Hello, World". 
+
+For more info, please see Chapter 6, "How to use Terraform as a Team", of 
+*[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+* You must have [Ruby](https://www.ruby-lang.org/) installed on your computer.
+* You must have [Terraform](https://www.terraform.io/) installed on your computer. 
+* You must have an [Amazon Web Services (AWS) account](http://aws.amazon.com/).
+
+## Quick start
+
+**Please note that this example will deploy real resources into your AWS account. We have made every effort to ensure 
+all the resources qualify for the [AWS Free Tier](https://aws.amazon.com/free/), but we are not responsible for any
+charges you may incur.** 
+
+Configure your [AWS access 
+keys](http://docs.aws.amazon.com/general/latest/gr/aws-sec-cred-types.html#access-keys-and-secret-access-keys) as 
+environment variables:
+
+```
+export AWS_ACCESS_KEY_ID=(your access key id)
+export AWS_SECRET_ACCESS_KEY=(your secret access key)
+```
+
+Deploy a test database of some sort that the web server cluster can connect to. For example, you could deploy the
+Terraform templates under 
+[code/terraform/06-terraform-team/live/stage/data-stores/mysql](/code/terraform/06-terraform-team/live/stage/data-stores/mysql).
+Make sure to note down the AWS region you're deploying into (e.g. `us-east-1`) as well as the S3 bucket name (e.g.
+`my-terraform-state`) and key (e.g. `qa/stage/data-stores/mysql/terraform.tfstate`) you use to store the remote state 
+data of the database.
+
+To run the Ruby automated test, navigate to a folder that contains the web server cluster templates, such as 
+[code/terraform/06-terraform-team/live/stage/services/webserver-cluster](/code/terraform/06-terraform-team/live/stage/services/webserver-cluster),
+and run the following:
+
+```
+ruby \
+  ../../../../../../ruby/06-terraform-team/terraform-test.rb \
+  us-east-1 \
+  my-terraform-state \
+  qa/stage/data-stores/mysql/terraform.tfstate
+```

code/ruby/06-terraform-team/terraform-test.rb

@@ -13,31 +13,30 @@
 }
 vars_string = vars.map{|key, value| "-var '#{key} = \"#{value}\"'"}.join(', ')
 
+def test_url(url, expected_text, retries)
+  retries.times do
+    begin
+      output = Net::HTTP.get(URI.parse(url))
+      puts "Output from #{url}: #{output}"
+      return 'Success!' if output.include? expected_text
+    rescue => e
+      puts "Error from #{url}: #{e}"
+    end
+
+    puts 'Sleeping for 30 seconds and trying again'
+    sleep 30
+  end
+
+  raise "Response didn't contain '#{expected_text}' after #{retries} retries"
+end
+
 begin
   puts "Deploying code in #{Dir.pwd}"
   puts `terraform get 2>&1`
   puts `terraform apply #{vars_string} 2>&1`
 
   elb_dns_name = `terraform output -no-color elb_dns_name`
-  url = "http://#{elb_dns_name.strip}/"
-
-  retries = 0
-  loop do
-    retries += 1
-    raise "Didn't get expected response after 10 retries"  if retries > 10
-
-    puts "Checking #{url}"
-    output = Net::HTTP.get(url)
-    puts "Output: #{output}"
-
-    if output.include? 'Hello, World'
-      puts 'Success!'
-      break
-    end
-
-    puts 'Sleeping for 30 seconds and trying again'
-    sleep(30.seconds)
-  end
+  puts test_url("http://#{elb_dns_name.strip}/", 'Hello, World', 10)
 ensure
   puts "Undeploying code in #{Dir.pwd}"
   puts `terraform destroy -force #{vars_string} 2>&1`

code/terraform/00-preface/hello-world/README.md

@@ -0,0 +1,46 @@
+# Terraform "Hello, World" example
+
+This folder contains a "Hello, World" example of a [Terraform](https://www.terraform.io/) template. The template 
+deploys a single server in an [Amazon Web Services (AWS) account](http://aws.amazon.com/). 
+
+For more info, please see the preface of *[Terraform: Up and Running](http://www.terraformupandrunning.com)*.
+
+## Pre-requisites
+
+* You must have [Terraform](https://www.terraform.io/) installed on your computer. 
+* You must have an [Amazon Web Services (AWS) account](http://aws.amazon.com/).
+
+Please note that this code was written for Terraform {{ terraform_version }}.
+
+## Quick start
+
+**Please note that this example will deploy real resources into your AWS account. We have made every effort to ensure 
+all the resources qualify for the [AWS Free Tier](https://aws.amazon.com/free/), but we are not responsible for any
+charges you may incur.** 
+
+Configure your [AWS access 
+keys](http://docs.aws.amazon.com/general/latest/gr/aws-sec-cred-types.html#access-keys-and-secret-access-keys) as 
+environment variables:
+
+```
+export AWS_ACCESS_KEY_ID=(your access key id)
+export AWS_SECRET_ACCESS_KEY=(your secret access key)
+```
+
+Validate the templates:
+
+```
+terraform plan
+```
+
+Deploy the code:
+
+```
+terraform apply
+```
+
+Clean up when you're done:
+
+```
+terraform destroy
+```