[New Template] ecs/cluster-cost-optimized.yaml (widdix#437)

* ECS Scaling 2.0

* keep old cluster template

* fixing template id

* adding test

* fixing IAM policy

Co-authored-by: Michael Wittig <[email protected]>

Author: andreaswittig

Diff for: .gitignore

@@ -0,0 +1 @@
+.DS_Store

Diff for: docs/ecs.md

@@ -34,6 +34,30 @@ This template describes a fault tolerant and scalable ECS cluster on AWS. The cl
 * `state/s3.yaml`
 * `state/client-sg.yaml`
 
+# ECS cluster (cost optimzed)
+This template describes a fault tolerant, scalable, and cost optimized ECS cluster on AWS. The cluster scales out event driven and scales in based on memory and CPU reservation. In case of a scale down, the instance drains all containers before it is terminated.
+
+![Architecture](./img/ecs-cluster.png)
+
+## Installation Guide
+1. This templates depends on one of our [`vpc-*azs.yaml`](./vpc/) templates. [![Launch Stack](./img/launch-stack.png)](https://console.aws.amazon.com/cloudformation/home#/stacks/create/review?templateURL=https://s3-eu-west-1.amazonaws.com/widdix-aws-cf-templates-releases-eu-west-1/__VERSION__/vpc/vpc-2azs.yaml&stackName=vpc)
+1. [![Launch Stack](./img/launch-stack.png)](https://console.aws.amazon.com/cloudformation/home#/stacks/create/review?templateURL=https://s3-eu-west-1.amazonaws.com/widdix-aws-cf-templates-releases-eu-west-1/__VERSION__/ecs/cluster-cost-optimized.yaml&stackName=ecs-cluster&param_ParentVPCStack=vpc)
+1. Click **Next** to proceed with the next step of the wizard.
+1. Specify a name and all parameters for the stack.
+1. Click **Next** to proceed with the next step of the wizard.
+1. Click **Next** to skip the **Options** step of the wizard.
+1. Check the **I acknowledge that this template might cause AWS CloudFormation to create IAM resources.** checkbox.
+1. Click **Create** to start the creation of the stack.
+1. Wait until the stack reaches the state **CREATE_COMPLETE**
+
+## Dependencies
+* `vpc/vpc-*azs.yaml` (**required**)
+* `vpc/vpc-*-bastion.yaml` (recommended)
+* `operations/alert.yaml` (recommended)
+* `security/auth-proxy-*.yaml`
+* `state/s3.yaml`
+* `state/client-sg.yaml`
+
 # ECS service
 This template describes a fault tolerant and scalable ECS service on AWS. The service scales based on CPU utilization.