# Spot Ocean k8s Terraform Module

Spotinst Terraform Module to integrate existing k8s with Ocean

Prerequisites

Installation of the Ocean controller is required by this resource. You can accomplish this by using the spotinst/ocean-controller module. The kubernetes provider will need to be initilaized before calling the ocean-controller module as follows:

terraform {
  required_providers {
    spotinst = {
      source = "spotinst/spotinst"
    }
  }
}

provider "spotinst" {
  token   = "redacted"
  account = "redacted"
}

module "ocean-aws-k8s" {
  source  = "spotinst/ocean-aws-k8s/spotinst"
  ...
}

# Data Resources for kubernetes provider
data "aws_eks_cluster" "cluster" {
  name    = "cluster name"
}
data "aws_eks_cluster_auth" "cluster" {
  name    = "cluster name"
}
provider "kubernetes" {
  host                   = data.aws_eks_cluster.cluster.endpoint
  cluster_ca_certificate = base64decode(data.aws_eks_cluster.cluster.certificate_authority.0.data)
  token                  = data.aws_eks_cluster_auth.cluster.token
}
##################

module "ocean-controller" {
  source = "spotinst/ocean-controller/spotinst"

  # Credentials.
  spotinst_token   = "redacted"
  spotinst_account = "redacted"

  # Configuration.
  tolerations = []
  cluster_identifier = "cluster name"
}

~> You must configure the same cluster_identifier both for the Ocean controller and for the spotinst_ocean_aws resource. The ocean-aws-k8s module will use the cluster name as the identifier. Ensure this is also used in the controller config

Usage

module "ocean-aws-k8s" {
  source = "spotinst/ocean-aws-k8s/spotinst"

  # Configuration
  cluster_name = "Sample-EKS"
  region = "us-west-2"
  subnet_ids = ["subnet-12345678","subnet-12345678"]
  #Fetch the instance profile from existing eks managed node group IAM role
  worker_instance_profile_arn = tolist(data.aws_iam_instance_profiles.profile.arns)[0]
  security_groups = ["sg-123456789","sg-123456789"]
  should_tag_volumes = true
  health_check_unhealthy_duration_before_replacement = 60
  
  # Shutdown hours block
  shutdown_hours = {
  is_enabled = false
  time_windows = ["Sat:08:00-Sun:08:00"]
  }
  
  # Scheduling tasks parameters block (amiAutoUpdate and clusterRoll)
  tasks = [
    {
      is_enabled = false
      cron_expression = "0 9 * * *"
      task_type = "amiAutoUpdate"
       ami_auto_update = [{
          apply_roll = false
          minor_version = false
          patch = true
          ami_auto_update_cluster_roll = [{
             batch_min_healthy_percentage = 50
             batch_size_percentage = 20
             comment = "Comments for AmiAutUpdate Cluster Roll"
             respect_pdb = true
          }]
       }]
    },
   {
       is_enabled = false
       cron_expression = "0 5 * * *"
       task_type = "clusterRoll"
       parameters_cluster_roll = [{
          batch_min_healthy_percentage = 50
          batch_size_percentage = 20
          comment = "Comments for Parameters Cluster Roll"
          respect_pdb = false
       }]
    }
  ]
     
  # Overwrite Name Tag and add additional
  tags = {Name = "Ocean-Nodes", CreatedBy = "Terraform"}

  # Block Device Mappings
  block_device_mappings = [
  {
    device_name = "/dev/xvda"
    delete_on_termination = false
    encrypted = true
    kms_key_id = "alias/aws/ebs"
    snapshot_id = null
    volume_type = "gp3"
    volume_size = null
    throughput = 125
    dynamic_volume_size = [{
        base_size = 30
        resource = "CPU"
        size_per_resource_unit = 25
    }]
    dynamic_iops = [{
        base_size = 20
        resource = "CPU"
        size_per_resource_unit = 12
    }]
  },
  {
     device_name = "/dev/xvda"
     encrypted = true
     iops = 100
     volume_type = "gp3"
     dynamic_volume_size = [{
        base_size = 50
        resource = "CPU"
        size_per_resource_unit = 20
     }]
  }
  ]
}

data "aws_iam_instance_profiles" "profile" {
  depends_on = [module.eks]
  role_name = module.eks.eks_managed_node_groups["one"].iam_role_name
}

Modules

• ocean-aws-k8s - Creates Ocean Cluster
• ocean-controller - Create and installs Spot Ocean controller pod Doc
• ocean-aws-k8s-vng - (Optional) Add custom virtual node groups Doc

Documentation

If you're new to Spot and want to get started, please checkout our Getting Started guide, available on the Spot Documentation website.

Getting Help

We use GitHub issues for tracking bugs and feature requests. Please use these community resources for getting help:

• Ask a question on Stack Overflow and tag it with terraform-spotinst.
• Join our Spot community on Slack.
• Open an issue.

Community

• Slack
• Twitter

Contributing

Please see the contribution guidelines.

Requirements

Name	Version
terraform	>= 1.6.3
aws	>= 3.70
spotinst	>= 1.139

Providers

Name	Version
aws	>= 3.70
spotinst	>= 1.139

Modules

No modules.

Resources

Name	Type
spotinst_ocean_aws.ocean	resource
aws_ami.eks_worker	data source
aws_default_tags.default_tags	data source
aws_eks_cluster.cluster	data source
aws_eks_cluster_auth.cluster	data source

Inputs

Name	Description	Type	Default	Required
ami_id	The image ID for the EKS worker nodes. If none is provided, Terraform will search for the latest version of their EKS optimized worker AMI based on platform	string	null	no
associate_ipv6_address	(Optional, Default: false) Configure IPv6 address allocation.	bool	false	no
associate_public_ip_address	(Optional, Default: false) Configure public IP address allocation.	bool	false	no
auto_apply_tags	Default: false. Will update instance tags on the fly without rolling the cluster.	bool	null	no
auto_headroom_percentage	Set the auto headroom percentage (a number in the range [0, 200]) which controls the percentage of headroom from the cluster.	number	5	no
autoscale_cooldown	Cooldown period between scaling actions.	number	null	no
autoscale_is_auto_config	Automatically configure and optimize headroom resources.	bool	true	no
autoscale_is_enabled	Enable the Ocean Kubernetes Auto Scaler.	bool	true	no
availability_vs_cost	(Optional, Default: balanced) You can control the approach that Ocean takes while launching nodes by configuring this value. Possible values: costOriented,balanced,cheapest.	string	"balanced"	no
batch_min_healthy_percentage	Default: 50. Indicates the threshold of minimum healthy instances in single batch. If the amount of healthy instances in single batch is under the threshold, the cluster roll will fail. If exists, the parameter value will be in range of 1-100. In case of null as value, the default value in the backend will be 50%. Value of param should represent the number in percentage (%) of the batch.	number	null	no
batch_size_percentage	Sets the percentage of the instances to deploy in each batch.	number	20	no
blacklist	List of instance types not allowed in the Ocean cluster (whitelist and blacklist are mutually exclusive)	list(string)	null	no
cluster_name	Cluster name	string	n/a	yes
conditioned_roll	Default: false. Spot will perform a cluster Roll in accordance with a relevant modification of the cluster’s settings. When set to true , only specific changes in the cluster’s configuration will trigger a cluster roll (such as AMI, Key Pair, user data, instance types, load balancers, etc).	bool	null	no
conditioned_roll_params	(Optional) A custom list of attributes will trigger the cluster roll operation (overrides the predefined list of parameters). Valid only when the conditioned_roll parameter is set to true.	list(string)	null	no
controller_id	Unique identifier for the Ocean controller. If not specified the cluster name will be used.	string	null	no
cpu_per_unit	Optionally configure the number of CPUs to allocate the headroom. CPUs are denoted in millicores, where 1000 millicores = 1 vCPU.	number	null	no
data_integration_id	The identifier of The S3 data integration to export the logs to.	string	null	no
desired_capacity	The number of worker nodes to launch and maintain in the Ocean cluster	number	1	no
draining_timeout	Draining timeout before terminating a node	number	120	no
ebs_optimized	launch specification defined on the Ocean object will function only as a template for virtual node groups.	bool	false	no
enable_automatic_and_manual_headroom	Default: false. Enables automatic and manual headroom to work in parallel. When set to false, automatic headroom overrides all other headroom definitions manually configured, whether they are at cluster or VNG level.	bool	null	no
extended_resource_definitions	List of Ocean extended resource definitions to use in this cluster.	list(string)	null	no
fallback_to_ondemand	Launch On-Demand in the event there are no EC2 spot instances available	bool	true	no
filters	List of filters. The Instance types that match with all filters compose the Ocean's whitelist parameter. Cannot be configured together with whitelist/blacklist.	object({ architectures = list(string) categories = list(string) disk_types = list(string) exclude_families = list(string) exclude_metal = bool hypervisor = list(string) include_families = list(string) is_ena_supported = bool max_gpu = number min_gpu = number max_memory_gib = number max_network_performance = number max_vcpu = number min_enis = number min_memory_gib = number min_network_performance = number min_vcpu = number root_device_types = list(string) virtualization_types = list(string) })	null	no
gpu_per_unit	Optionally configure the number of GPUs to allocate the headroom.	number	null	no
grace_period	The amount of time, in seconds, after the instance has launched to start checking its health.	number	600	no
http_put_response_hop_limit	An integer from 1 through 64. The desired HTTP PUT response hop limit for instance metadata requests. The larger the number, the further the instance metadata requests can travel.	number	1	no
http_tokens	Determines if a signed token is required or not. Valid values: optional or required.	string	"optional"	no
key_name	The key pair to attach the instances.	string	null	no
launch_spec_ids	List of virtual node group identifiers to be rolled.	list(string)	null	no
load_balancer	load_balancer object	list(object({ arn = string name = string type = string }))	null	no
max_memory_gib	The maximum memory in GiB units that can be allocated to the cluster.	number	100000	no
max_scale_down_percentage	Would represent the maximum % to scale-down. Number between 1-100.	number	10	no
max_size	The upper limit of worker nodes the Ocean cluster can scale up to	number	1000	no
max_vcpu	The maximum cpu in vCPU units that can be allocated to the cluster.	number	20000	no
memory_per_unit	Optionally configure the amount of memory (MB) to allocate the headroom.	number	null	no
min_size	The lower limit of worker nodes the Ocean cluster can scale down to	number	1	no
monitoring	Enable detailed monitoring for cluster. Flag will enable Cloud Watch detailed monitoring (one minute increments). Note: there are additional hourly costs for this service based on the region used.	bool	false	no
num_of_unit	The number of units to retain as headroom, where each unit has the defined headroom CPU and memory.	number	null	no
region	The region the cluster is located	string	n/a	yes
respect_pdb	Default: false. During the roll, if the parameter is set to True we honor PDB during the instance replacement.	bool	null	no
root_volume_size	The size (in Gb) to allocate for the root volume. Minimum 20.	number	null	no
security_groups	One or more security group ids.	list(string)	n/a	yes
should_roll	Should the cluster be rolled for configuration updates	string	false	no
shutdown_hours	shutdown_hours object	object({ is_enabled = bool time_windows = list(string) })	null	no
spot_percentage	The % of the cluster should be running on Spot vs OD. 100 means 100% of the cluster will be ran on Spot instances	number	null	no
spread_nodes_by	(Optional, Default: count) Ocean will spread the nodes across markets by this value. Possible values: vcpu or count.	string	"count"	no
subnet_ids	List of subnet IDs	list(string)	n/a	yes
tags	Additional Tags to be added to resources	map(string)	null	no
tasks	task object	list(object({ is_enabled = bool cron_expression = string task_type = string ami_auto_update = set(object({ apply_roll = bool minor_version = bool patch = bool ami_auto_update_cluster_roll = set(object({ batch_min_healthy_percentage = number batch_size_percentage = number comment = string respect_pdb })), []) })), []) parameters_cluster_roll = set(object({ batch_min_healthy_percentage = number batch_size_percentage = number comment = string respect_pdb })), []) }))	null	no
use_as_template_only	launch specification defined on the Ocean object will function only as a template for virtual node groups.	bool	false	no
user_data	n/a	string	null	no
utilize_commitments	If savings plans commitment has available capacity, Ocean will utilize them alongside RIs (if exist) to maximize cost efficiency.	bool	false	no
utilize_reserved_instances	If there are any vacant Reserved Instances, launch On-Demand to consume them	bool	true	no
whitelist	List of instance types allowed in the Ocean cluster (whitelist and blacklist are mutually exclusive)	list(string)	null	no
worker_instance_profile_arn	The instance profile iam role.	string	n/a	yes
block_device_mappings	block_device_mapping object	list(object({ device_name = string delete_on_termination = bool encrypted = bool kms_key_id = string snapshot_id = string volume_type = string iops = number volume_size = number throughput = number dynamic_iops = set(object({ base_size = number resource = string size_per_resource_unit = number })), []) dynamic_volume_size = set(object({ base_size = number resource = string size_per_resource_unit = number })), []) }))	[]	no
should_tag_volumes	(Optional, Default: false) Specify if Volume resources will be tagged with Virtual Node Group tags or Ocean tags.	bool	false	no
is_aggressive_scale_down_enabled	(Optional, Default: false) When set to true, Enables and customize the Aggressive Scale Down feature. This allows nodes to be promptly scaled down by the Ocean Autoscaler as soon as they become eligible, without any waiting period.	bool	false	no
health_check_unhealthy_duration_before_replacement	The amount of time, in seconds, an existing instance should remain active after becoming unhealthy. After the set time out the instance will be replaced. The minimum value allowed is 60, and it must be a multiple of 60.	number	120	no

Outputs

Name	Description
ocean_controller_id	The Ocean controller ID
ocean_id	The Ocean cluster ID