Migrate to README.yaml format, add travis (#13)

.gitignore

@@ -6,3 +6,6 @@
 .terraform
 .idea
 *.iml
+
+**/.build-harness
+**/build-harness
\ No newline at end of file

.travis.yml

+addons:
+  apt:
+    packages:
+      - git
+      - make
+      - curl
+
+install:
+  - make init
+
+script:
+  - make terraform:install
+  - make terraform:get-plugins
+  - make terraform:get-modules
+  - make terraform:lint
+  - make terraform:validate

Makefile

+SHELL := /bin/bash
+
+# List of targets the `readme` target should call before generating the readme
+export README_DEPS ?= docs/targets.md docs/terraform.md
+
+-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
+
+## Lint terraform code
+lint:
+	$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate
\ No newline at end of file

README.yaml

+---
+#
+# This is the canonical configuration for the `README.md`
+# Run `make readme` to rebuild the `README.md`
+#
+
+# Name of this project
+name: terraform-aws-elasticache-redis
+
+# Logo for this project
+#logo: docs/logo.png
+
+# License of this project
+license: "APACHE2"
+
+# Canonical GitHub repo
+github_repo: cloudposse/terraform-aws-elasticache-redis
+
+# Badges to display
+badges:
+  - name: "Build Status"
+    image: "https://travis-ci.org/cloudposse/terraform-aws-elasticache-redis.svg?branch=master"
+    url: "https://travis-ci.org/cloudposse/terraform-aws-elasticache-redis"
+  - name: "Latest Release"
+    image: "https://img.shields.io/github/release/cloudposse/terraform-aws-elasticache-redis.svg"
+    url: "https://travis-ci.org/cloudposse/terraform-aws-elasticache-redis/releases"
+  - name: "Slack Community"
+    image: "https://slack.cloudposse.com/badge.svg"
+    url: "https://slack.cloudposse.com"
+
+# Short description of this project
+description: |-
+  Terraform module to provision an [`ElastiCache`](https://aws.amazon.com/elasticache/) Redis Cluster
+
+# How to use this project
+usage: |-
+  Include this repository as a module in your existing terraform code:
+
+  ```hcl
+  module "example_redis" {
+    source          = "git::https://github.com/cloudposse/terraform-aws-elasticache-redis.git?ref=master"
+    namespace       = "general"
+    name            = "redis"
+    stage           = "prod"
+    zone_id         = "${var.route53_zone_id}"
+    security_groups = ["${var.security_group_id}"]
+
+    vpc_id                       = "${var.vpc_id}"
+    subnets                      = "${var.private_subnets}"
+    maintenance_window           = "wed:03:00-wed:04:00"
+    cluster_size                 = "2"
+    instance_type                = "cache.t2.micro"
+    engine_version               = "3.2.4"
+    alarm_cpu_threshold_percent  = "${var.cache_alarm_cpu_threshold_percent}"
+    alarm_memory_threshold_bytes = "${var.cache_alarm_memory_threshold_bytes}"
+    apply_immediately            = "true"
+    availability_zones           = "${var.availability_zones}"
+
+    automatic_failover = "false"
+  }
+  ```
+
+
+include:
+  - "docs/targets.md"
+  - "docs/terraform.md"
+
+# Contributors to this project
+contributors:
+  - name: "Erik Osterman"
+    github: "osterman"
+  - name: "Igor Rodionov"
+    github: "goruha"
+  - name: "Andriy Knysh"
+    github: "aknysh"
+  - name: "Daren Desjardins"
+    github: "darend"
+  - name: "Max Moon"
+    github: "MoonMoon1919"
+  - name: "Christopher Riley"
+    github: "christopherriley"
\ No newline at end of file

docs/targets.md

+## Makefile Targets
+```
+Available targets:
+
+  help                                This help screen
+  help/all                            Display help for all targets
+  lint                                Lint terraform code
+
+```

docs/terraform.md

+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| alarm_actions | Alarm action list | list | `<list>` | no |
+| alarm_cpu_threshold_percent | CPU threshold alarm level | string | `75` | no |
+| alarm_memory_threshold_bytes | Ram threshold alarm level | string | `10000000` | no |
+| apply_immediately | Apply changes immediately | string | `true` | no |
+| attributes | Additional attributes (_e.g._ "1") | list | `<list>` | no |
+| automatic_failover | Automatic failover (Not available for T1/T2 instances) | string | `false` | no |
+| availability_zones | Availability zone ids | list | `Availability zone ids` | no |
+| cluster_size | Count of nodes in cluster | string | `1` | no |
+| delimiter | Delimiter between `name`, `namespace`, `stage` and `attributes` | string | `-` | no |
+| enabled | Set to false to prevent the module from creating any resources | string | `true` | no |
+| engine_version | Redis engine version | string | `4.0.10` | no |
+| family | Redis family | string | `redis4.0` | no |
+| instance_type | Elastic cache instance type | string | `cache.t2.micro` | no |
+| maintenance_window | Maintenance window | string | `wed:03:00-wed:04:00` | no |
+| name | Name | string | `redis` | no |
+| namespace | Namespace | string | `global` | no |
+| notification_topic_arn | Notification topic arn | string | `10000000` | no |
+| port | Redis port | string | `6379` | no |
+| security_groups | AWS security group ids | list | `<list>` | no |
+| stage | Stage | string | `default` | no |
+| subnets | AWS subnet ids | list | `<list>` | no |
+| tags | Additional tags (_e.g._ map("BusinessUnit","ABC") | map | `<map>` | no |
+| vpc_id | AWS VPC id | string | `REQUIRED` | no |
+| zone_id | Route53 DNS Zone id | string | `false` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| host | Redis host |
+| id | Redis cluster id |
+| port | Redis port |
+| security_group_id | Security group id |
+

output.tf

 output "id" {
   value       = "${join("", aws_elasticache_replication_group.default.*.id)}"
+  description = "Redis cluster id"
 }
 
 output "security_group_id" {
   value       = "${join("", aws_security_group.default.*.id)}"
+  description = "Security group id"
 }
 
 output "port" {
   value       = "${var.port}"
+  description = "Redis port"
 }
 
 output "host" {
   value       = "${module.dns.hostname}"
+  description = "Redis host"
 }

variables.tf

 variable "namespace" {
   default     = "global"
+  description = "Namespace"
 }
 
 variable "enabled" {
@@ -9,92 +10,118 @@ variable "enabled" {
 
 variable "stage" {
   default     = "default"
+  description = "Stage"
 }
 
 variable "name" {
   default     = "redis"
+  description = "Name"
 }
 
 variable "security_groups" {
   type        = "list"
+  default     = []
+  description = "AWS security group ids"
 }
 
 variable "vpc_id" {
-  default = ""
+  default     = "REQUIRED"
+  description = "AWS VPC id"
 }
 
 variable "subnets" {
   type        = "list"
+  description = "AWS subnet ids"
   default     = []
 }
 
 variable "maintenance_window" {
   default     = "wed:03:00-wed:04:00"
+  description = "Maintenance window"
 }
 
 variable "cluster_size" {
   default     = "1"
+  description = "Count of nodes in cluster"
 }
 
 variable "port" {
   default     = "6379"
+  description = "Redis port"
 }
 
 variable "instance_type" {
   default     = "cache.t2.micro"
+  description = "Elastic cache instance type"
 }
 
 variable "family" {
   default     = "redis4.0"
+  description = "Redis family "
 }
 
 variable "engine_version" {
   default     = "4.0.10"
+  description = "Redis engine version"
 }
 
 variable "notification_topic_arn" {
-  default = ""
+  default     = "10000000"
+  description = "Notification topic arn"
 }
 
 variable "alarm_cpu_threshold_percent" {
   default     = "75"
+  description = "CPU threshold alarm level"
 }
 
 variable "alarm_memory_threshold_bytes" {
   # 10MB
   default     = "10000000"
+  description = "Ram threshold alarm level"
 }
 
 variable "alarm_actions" {
   type        = "list"
+  description = "Alarm action list"
   default     = []
 }
 
 variable "apply_immediately" {
   default     = "true"
+  description = "Apply changes immediately"
 }
 
 variable "automatic_failover" {
   default     = "false"
+  description = "Automatic failover (Not available for T1/T2 instances)"
 }
 
 variable "availability_zones" {
   type        = "list"
+  description = "Availability zone ids"
+  default     = "Availability zone ids"
 }
 
-variable "zone_id" {}
+variable "zone_id" {
+  default     = "false"
+  description = "Route53 DNS Zone id"
+}
 
 variable "delimiter" {
   type        = "string"
   default     = "-"
+  description = "Delimiter between `name`, `namespace`, `stage` and `attributes`"
 }
 
 variable "attributes" {
   type        = "list"
+  description = "Additional attributes (_e.g._ \"1\")"
   default     = []
 }
 
 variable "tags" {
   type        = "map"
+  description = "Additional tags (_e.g._ map(\"BusinessUnit\",\"ABC\")"
   default     = {}
 }