From 3b18a9193d06f23e6ff0ad6a2d5458fdc914589c Mon Sep 17 00:00:00 2001
From: Daniel Tomlinson <dtomlinson@panaetius.co.uk>
Date: Tue, 28 Jul 2020 23:01:23 +0100
Subject: [PATCH] Adding terraform

---
 .gitignore                           |  39 +++++
 infrastructure/LICENSE               |  19 +++
 infrastructure/Makefile              | 215 +++++++++++++++++++++++++++
 infrastructure/Makefile.env          |   4 +
 infrastructure/README.md             |  11 ++
 infrastructure/main.tf               |  64 ++++++++
 infrastructure/outputs.tf            |   0
 infrastructure/prod-eu-west-1.tfvars |   5 +
 infrastructure/variables.tf          |  15 ++
 9 files changed, 372 insertions(+)
 create mode 100644 infrastructure/LICENSE
 create mode 100644 infrastructure/Makefile
 create mode 100644 infrastructure/Makefile.env
 create mode 100644 infrastructure/README.md
 create mode 100644 infrastructure/main.tf
 create mode 100644 infrastructure/outputs.tf
 create mode 100644 infrastructure/prod-eu-west-1.tfvars
 create mode 100644 infrastructure/variables.tf

diff --git a/.gitignore b/.gitignore
index 778b4b8..e4a4c2f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -115,3 +115,42 @@ build
 .elasticbeanstalk/*
 !.elasticbeanstalk/*.cfg.yml
 !.elasticbeanstalk/*.global.yml
+
+############################
+# Terraform
+############################
+
+# Local .terraform directories
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Crash log files
+crash.log
+
+# Exclude all .tfvars files, which are likely to contain sentitive data, such as
+# password, private keys, and other secrets. These should not be part of version
+# control as they are data points which are potentially sensitive and subject
+# to change depending on the environment.
+#
+# *.tfvars
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negated pattern
+#
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+# example: *tfplan*
+
+# Ignore CLI configuration files
+.terraformrc
+terraform.rc
diff --git a/infrastructure/LICENSE b/infrastructure/LICENSE
new file mode 100644
index 0000000..204b93d
--- /dev/null
+++ b/infrastructure/LICENSE
@@ -0,0 +1,19 @@
+MIT License Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/infrastructure/Makefile b/infrastructure/Makefile
new file mode 100644
index 0000000..41847f5
--- /dev/null
+++ b/infrastructure/Makefile
@@ -0,0 +1,215 @@
+# Copyright 2016 Philip G. Porada
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+.ONESHELL:
+.SHELL := /usr/bin/bash
+.PHONY: apply destroy-backend destroy destroy-target plan-destroy plan plan-target prep
+
+-include Makefile.env
+# VARS="variables/$(ENV)-$(REGION).tfvars"
+VARS="$(ENV)-$(REGION).tfvars"
+CURRENT_FOLDER=$(shell basename "$$(pwd)")
+S3_BUCKET="$(ENV)-$(REGION)-$(PROJECT)-terraform"
+DYNAMODB_TABLE="$(ENV)-$(REGION)-$(PROJECT)-terraform"
+WORKSPACE="$(ENV)-$(REGION)"
+BOLD=$(shell tput bold)
+RED=$(shell tput setaf 1)
+GREEN=$(shell tput setaf 2)
+YELLOW=$(shell tput setaf 3)
+RESET=$(shell tput sgr0)
+
+help:
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+
+set-env:
+	@if [ -z $(ENV) ]; then \
+		echo "$(BOLD)$(RED)ENV was not set$(RESET)"; \
+		ERROR=1; \
+	 fi
+	@if [ -z $(REGION) ]; then \
+		echo "$(BOLD)$(RED)REGION was not set$(RESET)"; \
+		ERROR=1; \
+	 fi
+	@if [ -z $(AWS_PROFILE) ]; then \
+		echo "$(BOLD)$(RED)AWS_PROFILE was not set.$(RESET)"; \
+		ERROR=1; \
+	 fi
+	@if [ ! -z $${ERROR} ] && [ $${ERROR} -eq 1 ]; then \
+		echo "$(BOLD)Example usage: \`AWS_PROFILE=whatever ENV=demo REGION=us-east-2 make plan\`$(RESET)"; \
+		exit 1; \
+	 fi
+	@if [ ! -f "$(VARS)" ]; then \
+		echo "$(BOLD)$(RED)Could not find variables file: $(VARS)$(RESET)"; \
+		exit 1; \
+	 fi
+
+prep: set-env ## Prepare a new workspace (environment) if needed, configure the tfstate backend, update any modules, and switch to the workspace
+	@echo "$(BOLD)Verifying that the S3 bucket $(S3_BUCKET) for remote state exists$(RESET)"
+	@if ! aws --profile $(AWS_PROFILE) s3api head-bucket --region $(REGION) --bucket $(S3_BUCKET) > /dev/null 2>&1 ; then \
+		echo "$(BOLD)S3 bucket $(S3_BUCKET) was not found, creating new bucket with versioning enabled to store tfstate$(RESET)"; \
+		aws --profile $(AWS_PROFILE) s3api create-bucket \
+			--bucket $(S3_BUCKET) \
+			--acl private \
+			--region $(REGION) \
+			--create-bucket-configuration LocationConstraint=$(REGION) > /dev/null 2>&1 ; \
+		aws --profile $(AWS_PROFILE) s3api put-bucket-versioning \
+			--bucket $(S3_BUCKET) \
+			--versioning-configuration Status=Enabled > /dev/null 2>&1 ; \
+		echo "$(BOLD)$(GREEN)S3 bucket $(S3_BUCKET) created$(RESET)"; \
+	 else
+		echo "$(BOLD)$(GREEN)S3 bucket $(S3_BUCKET) exists$(RESET)"; \
+	 fi
+	@echo "$(BOLD)Verifying that the DynamoDB table exists for remote state locking$(RESET)"
+	@if ! aws --profile $(AWS_PROFILE) --region $(REGION) dynamodb describe-table --table-name $(DYNAMODB_TABLE) > /dev/null 2>&1 ; then \
+		echo "$(BOLD)DynamoDB table $(DYNAMODB_TABLE) was not found, creating new DynamoDB table to maintain locks$(RESET)"; \
+		aws --profile $(AWS_PROFILE) dynamodb create-table \
+        	--region $(REGION) \
+        	--table-name $(DYNAMODB_TABLE) \
+        	--attribute-definitions AttributeName=LockID,AttributeType=S \
+        	--key-schema AttributeName=LockID,KeyType=HASH \
+        	--provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5 > /dev/null 2>&1 ; \
+		echo "$(BOLD)$(GREEN)DynamoDB table $(DYNAMODB_TABLE) created$(RESET)"; \
+		echo "Sleeping for 10 seconds to allow DynamoDB state to propagate through AWS"; \
+		sleep 10; \
+	 else
+		echo "$(BOLD)$(GREEN)DynamoDB Table $(DYNAMODB_TABLE) exists$(RESET)"; \
+	 fi
+	@aws ec2 --profile=$(AWS_PROFILE) describe-key-pairs | jq -r '.KeyPairs[].KeyName' | grep "$(ENV)_infra_key" > /dev/null 2>&1; \
+	if [ $$? -ne 0 ]; then \
+	    echo "$(BOLD)$(RED)EC2 Key Pair $(INFRA_KEY)_infra_key was not found$(RESET)"; \
+	    read -p '$(BOLD)Do you want to generate a new keypair? [y/Y]: $(RESET)' ANSWER && \
+    	if [ "$${ANSWER}" == "y" ] || [ "$${ANSWER}" == "Y" ]; then \
+	        mkdir -p ~/.ssh; \
+	        ssh-keygen -t rsa -b 4096 -N '' -f ~/.ssh/$(ENV)_infra_key; \
+        	aws ec2 --profile=$(AWS_PROFILE) import-key-pair --key-name "$(ENV)_infra_key" --public-key-material "file://~/.ssh/$(ENV)_infra_key.pub"; \
+    	fi; \
+	  else \
+	      echo "$(BOLD)$(GREEN)EC2 Key Pair $(ENV)_infra_key exists$(RESET)";\
+	  fi
+	@echo "$(BOLD)Configuring the terraform backend$(RESET)"
+	@terraform init \
+		-input=false \
+		-force-copy \
+		-lock=true \
+		-upgrade \
+		-verify-plugins=true \
+		-backend=true \
+		-backend-config="profile=$(AWS_PROFILE)" \
+		-backend-config="region=$(REGION)" \
+		-backend-config="bucket=$(S3_BUCKET)" \
+		-backend-config="key=$(ENV)/$(CURRENT_FOLDER)/terraform.tfstate" \
+		-backend-config="dynamodb_table=$(DYNAMODB_TABLE)"\
+	    -backend-config="acl=private"
+	@echo "$(BOLD)Switching to workspace $(WORKSPACE)$(RESET)"
+	@terraform workspace select $(WORKSPACE) || terraform workspace new $(WORKSPACE)
+
+plan: prep ## Show what terraform thinks it will do
+	@terraform plan \
+		-lock=true \
+		-input=false \
+		-refresh=true \
+		-var-file="$(VARS)"
+
+format: prep ## Rewrites all Terraform configuration files to a canonical format.
+	@terraform fmt \
+		-write=true \
+    -recursive
+
+# https://github.com/terraform-linters/tflint
+lint: prep ## Check for possible errors, best practices, etc in current directory!
+	@tflint
+
+# https://github.com/liamg/tfsec
+check-security: prep ## Static analysis of your terraform templates to spot potential security issues.
+	@tfsec .
+
+documentation: prep ## Generate README.md for a module
+	@terraform-docs \
+		markdown table \
+		--sort-by-required  . > README.md
+
+plan-target: prep ## Shows what a plan looks like for applying a specific resource
+	@echo "$(YELLOW)$(BOLD)[INFO]   $(RESET)"; echo "Example to type for the following question: module.rds.aws_route53_record.rds-master"
+	@read -p "PLAN target: " DATA && \
+		terraform plan \
+			-lock=true \
+			-input=true \
+			-refresh=true \
+			-var-file="$(VARS)" \
+			-target=$$DATA
+
+plan-destroy: prep ## Creates a destruction plan.
+	@terraform plan \
+		-input=false \
+		-refresh=true \
+		-destroy \
+		-var-file="$(VARS)"
+
+apply: prep ## Have terraform do the things. This will cost money.
+	@terraform apply \
+		-lock=true \
+		-input=false \
+		-refresh=true \
+		-var-file="$(VARS)"
+
+destroy: prep ## Destroy the things
+	@terraform destroy \
+		-lock=true \
+		-input=false \
+		-refresh=true \
+		-var-file="$(VARS)"
+
+destroy-target: prep ## Destroy a specific resource. Caution though, this destroys chained resources.
+	@echo "$(YELLOW)$(BOLD)[INFO] Specifically destroy a piece of Terraform data.$(RESET)"; echo "Example to type for the following question: module.rds.aws_route53_record.rds-master"
+	@read -p "Destroy target: " DATA && \
+		terraform destroy \
+		-lock=true \
+		-input=false \
+		-refresh=true \
+		-var-file=$(VARS) \
+		-target=$$DATA
+
+destroy-backend: ## Destroy S3 bucket and DynamoDB table
+	@if ! aws --profile $(AWS_PROFILE) dynamodb delete-table \
+		--region $(REGION) \
+		--table-name $(DYNAMODB_TABLE) > /dev/null 2>&1 ; then \
+			echo "$(BOLD)$(RED)Unable to delete DynamoDB table $(DYNAMODB_TABLE)$(RESET)"; \
+	 else
+		echo "$(BOLD)$(RED)DynamoDB table $(DYNAMODB_TABLE) does not exist.$(RESET)"; \
+	 fi
+	@if ! aws --profile $(AWS_PROFILE) s3api delete-objects \
+		--region $(REGION) \
+		--bucket $(S3_BUCKET) \
+		--delete "$$(aws --profile $(AWS_PROFILE) s3api list-object-versions \
+						--region $(REGION) \
+						--bucket $(S3_BUCKET) \
+						--output=json \
+						--query='{Objects: Versions[].{Key:Key,VersionId:VersionId}}')" > /dev/null 2>&1 ; then \
+			echo "$(BOLD)$(RED)Unable to delete objects in S3 bucket $(S3_BUCKET)$(RESET)"; \
+	 fi
+	@if ! aws --profile $(AWS_PROFILE) s3api delete-objects \
+		--region $(REGION) \
+		--bucket $(S3_BUCKET) \
+		--delete "$$(aws --profile $(AWS_PROFILE) s3api list-object-versions \
+						--region $(REGION) \
+						--bucket $(S3_BUCKET) \
+						--output=json \
+						--query='{Objects: DeleteMarkers[].{Key:Key,VersionId:VersionId}}')" > /dev/null 2>&1 ; then \
+			echo "$(BOLD)$(RED)Unable to delete markers in S3 bucket $(S3_BUCKET)$(RESET)"; \
+	 fi
+	@if ! aws --profile $(AWS_PROFILE) s3api delete-bucket \
+		--region $(REGION) \
+		--bucket $(S3_BUCKET) > /dev/null 2>&1 ; then \
+			echo "$(BOLD)$(RED)Unable to delete S3 bucket $(S3_BUCKET) itself$(RESET)"; \
+	 fi
diff --git a/infrastructure/Makefile.env b/infrastructure/Makefile.env
new file mode 100644
index 0000000..081352a
--- /dev/null
+++ b/infrastructure/Makefile.env
@@ -0,0 +1,4 @@
+ENV="prod"
+REGION="eu-west-1"
+PROJECT="strapi-elb"
+AWS_PROFILE="admin"
diff --git a/infrastructure/README.md b/infrastructure/README.md
new file mode 100644
index 0000000..efa691d
--- /dev/null
+++ b/infrastructure/README.md
@@ -0,0 +1,11 @@
+# terraform
+
+Boilerplate for TF
+
+Usage:
+
+- Clone into a project at root level.
+- Rename `./terraform` to `infrastructure` (if needed).
+- Delete `./infrastructure/.git/` and `./infrastructure/.gitignore`
+
+Commit to project.
\ No newline at end of file
diff --git a/infrastructure/main.tf b/infrastructure/main.tf
new file mode 100644
index 0000000..55d15c2
--- /dev/null
+++ b/infrastructure/main.tf
@@ -0,0 +1,64 @@
+# aws config
+provider "aws" {
+  region  = var.region
+  profile = var.profile
+  version = "~> 2.70.0"
+}
+
+# tags
+locals {
+  tags = {
+    "Project"     = "strapi-elb"
+    "Description" = "Terraform resources for strapi in Elastic Beanstalk"
+  }
+}
+
+# Network
+
+module "vpc" {
+  source = "git::https://github.com/cloudposse/terraform-aws-vpc?ref=tags/0.14.0"
+  stage  = var.stage
+  name   = var.name
+
+  cidr_block                                      = "172.16.0.0/16"
+  enable_default_security_group_with_custom_rules = false
+}
+
+module "subnets" {
+  source = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets?ref=tags/0.23.0"
+  stage  = var.stage
+  name   = var.name
+
+  availability_zones   = ["eu-west-1a", "eu-west-1b", "eu-west-1c"]
+  vpc_id               = module.vpc.vpc_id
+  igw_id               = module.vpc.igw_id
+  cidr_block           = module.vpc.vpc_cidr_block
+  nat_gateway_enabled  = false
+  nat_instance_enabled = false
+}
+
+# RDS instance
+
+module "rds_instance" {
+  source = "git::https://github.com/cloudposse/terraform-aws-rds.git?ref=tags/0.20.0"
+  stage  = var.stage
+  name   = var.name
+
+  allocated_storage   = 5
+  database_name       = "postgres"
+  database_user       = "mainuser"
+  database_password   = "password"
+  database_port       = 5432
+  db_parameter_group  = "postgres12"
+  engine              = "postgres"
+  engine_version      = "12.3"
+  instance_class      = "db.t2.micro"
+  subnet_ids          = module.subnets.public_subnet_ids
+  vpc_id              = module.vpc.vpc_id
+  publicly_accessible = true
+  tags                = local.tags
+}
+
+# Set maintenance window
+# subnet_ids and vpc_id required
+# need a security group for the DB with ingress rule allowing inbound from the autoscaler/EB security group (does a single instance have an SC?) - use 0.0.0.0 for initial creation then change the TF stack with the EB security group once it's created.
diff --git a/infrastructure/outputs.tf b/infrastructure/outputs.tf
new file mode 100644
index 0000000..e69de29
diff --git a/infrastructure/prod-eu-west-1.tfvars b/infrastructure/prod-eu-west-1.tfvars
new file mode 100644
index 0000000..5d72c46
--- /dev/null
+++ b/infrastructure/prod-eu-west-1.tfvars
@@ -0,0 +1,5 @@
+# module
+name    = "strapi-elb"
+region  = "eu-west-1"
+stage   = "prod"
+profile = "admin"
diff --git a/infrastructure/variables.tf b/infrastructure/variables.tf
new file mode 100644
index 0000000..c47410c
--- /dev/null
+++ b/infrastructure/variables.tf
@@ -0,0 +1,15 @@
+variable "name" {
+
+}
+
+variable "region" {
+
+}
+
+variable "stage" {
+
+}
+
+variable "profile" {
+
+}