Update default override instance types to work with Cluster Autoscaler (#425)

CHANGELOG.md

@@ -17,6 +17,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+ - Update default override instance types to work with Cluster Autoscaler (by @nauxliu on behalf of RightCapital)
  - Write your awesome change here (by @you)
 
 # History

docs/autoscaling.md

@@ -27,3 +27,7 @@ To install the chart, simply run helm with the `--values` option:
 ```
 helm install stable/cluster-autoscaler --values=path/to/your/values-file.yaml
 ```
+
+## See More
+
+[Using AutoScalingGroup MixedInstancesPolicy](https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/cloudprovider/aws/README.md#using-autoscalinggroup-mixedinstancespolicy)

examples/spot_instances/main.tf

@@ -58,7 +58,7 @@ module "eks" {
   worker_groups_launch_template_mixed = [
     {
       name                    = "spot-1"
-      override_instance_types = ["m5.large", "c5.large", "t3.large", "r5.large"]
+      override_instance_types = ["m5.large", "m5a.large", "m5d.large", "m5ad.large"]
       spot_instance_pools     = 4
       asg_max_size            = 5
       asg_desired_capacity    = 5

local.tf

@@ -73,7 +73,7 @@ locals {
     root_encrypted                    = ""                                       # Whether the volume should be encrypted or not
     eni_delete                        = true                                     # Delete the ENI on termination (if set to false you will have to manually delete before destroying)
     # Settings for launch templates with mixed instances policy
-    override_instance_types                  = ["m5.large", "c5.large", "t3.large", "r5.large"] # A list of override instance types for mixed instances policy
+    override_instance_types                  = ["m5.large", "m5a.large", "m5d.large", "m5ad.large"] # A list of override instance types for mixed instances policy
     on_demand_allocation_strategy            = "prioritized"                                        # Strategy to use when launching on-demand instances. Valid values: prioritized.
     on_demand_base_capacity                  = "0"                                                  # Absolute minimum amount of desired capacity that must be fulfilled by on-demand instances
     on_demand_percentage_above_base_capacity = "0"                                                  # Percentage split between on-demand and Spot instances above the base on-demand capacity