This terraform-aws-eks-spotinst-ocean-nodepool module provides the scaffolding for provisioning a Spotinst Ocean connected to an AWS EKS cluster.

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Usage

Here's how to invoke this module in your projects

module "spotinst_oceans" {
  source = "cloudposse/eks-spotinst-ocean-nodepool/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  disk_size           = var.disk_size
  instance_types      = var.instance_types
  instance_profile    = var.instance_profile_name
  kubernetes_version = var.kubernetes_version
  min_size           = var.min_group_size == null ? local.so_def.min_group_size : var.min_group_size
  max_size           = var.max_group_size == null ? local.so_def.max_group_size : var.max_group_size
  desired_capacity    = var.desired_group_size == null ? local.so_def.desired_group_size : var.desired_group_size

  eks_cluster_id      = module.eks_cluster.eks_cluster_id
  ocean_controller_id = module.eks_cluster.eks_cluster_id
  region              = var.region
  subnet_ids          = module.vpc.private_subnet_ids
  security_group_ids  = [module.eks_cluster.eks_cluster_managed_security_group_id]

  context = module.this.context
}

Important

In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.

Examples

Here is an example of using this module:

• examples/complete - complete example of using this module

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name	Version
terraform	>= 0.13
aws	>= 3.18
kubernetes	>= 1.0
local	>= 1.2
random	>= 2.2
spotinst	>= 1.56

Providers

Name	Version
aws	>= 3.18
spotinst	>= 1.56

Modules

Name	Source	Version
this	cloudposse/label/null	0.25.0
worker_label	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_iam_instance_profile.worker	resource
aws_iam_role.worker	resource
aws_iam_role_policy_attachment.amazon_ec2_container_registry_read_only	resource
aws_iam_role_policy_attachment.amazon_eks_cni_policy	resource
aws_iam_role_policy_attachment.amazon_eks_worker_node_policy	resource
aws_iam_role_policy_attachment.existing_policies_for_eks_workers_role	resource
spotinst_ocean_aws.this	resource
aws_ami.selected	data source
aws_iam_policy_document.assume_role	data source
aws_partition.current	data source

Inputs

Name	Description	Type	Default	Required
additional_tag_map	Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id. This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration.	map(string)	{}	no
after_cluster_joining_userdata	Additional bash commands to execute on each worker node after joining the EKS cluster (after executing the bootstrap.sh script). For more info, see https://kubedex.com/90-days-of-aws-eks-in-production	string	""	no
ami_image_id	AMI to use. Ignored of launch_template_id is supplied.	string	null	no
ami_release_version	EKS AMI version to use, e.g. "1.16.13-20200821" (no "v"). Defaults to latest version for Kubernetes version.	string	null	no
ami_type	Type of Amazon Machine Image (AMI) associated with the Ocean. Defaults to AL2_x86_64. Valid values: AL2_x86_64, AL2_x86_64_GPU, and AL2_ARM_64.	string	"AL2_x86_64"	no
associate_public_ip_address	Associate a public IP address to worker nodes	bool	false	no
attributes	ID element. Additional attributes (e.g. workers or cluster) to add to id, in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiter and treated as a single ID element.	list(string)	[]	no
before_cluster_joining_userdata	Additional bash commands to execute on each worker node before joining the EKS cluster (before executing the bootstrap.sh script). For more info, see https://kubedex.com/90-days-of-aws-eks-in-production	string	""	no
bootstrap_additional_options	Additional options to bootstrap.sh. DO NOT include --kubelet-additional-args, use kubelet_additional_args var instead.	string	""	no
context	Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value. Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged.	any	{ "additional_tag_map": {}, "attributes": [], "delimiter": null, "descriptor_formats": {}, "enabled": true, "environment": null, "id_length_limit": null, "label_key_case": null, "label_order": [], "label_value_case": null, "labels_as_tags": [ "unset" ], "name": null, "namespace": null, "regex_replace_chars": null, "stage": null, "tags": {}, "tenant": null }	no
delimiter	Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all.	string	null	no
descriptor_formats	Describe additional descriptors to be output in the descriptors output map. Map of maps. Keys are names of descriptors. Values are maps of the form {<br/> format = string<br/> labels = list(string)<br/>} (Type is any so the map values can later be enhanced to provide additional options.) format is a Terraform format string to be passed to the format() function. labels is a list of labels, in order, to pass to format() function. Label values will be normalized before being passed to format() so they will be identical to how they appear in id. Default is {} (descriptors output will be empty).	any	{}	no
desired_capacity	The number of worker nodes to launch and maintain in the Ocean cluster	number	1	no
disk_size	Disk size in GiB for worker nodes. Defaults to 20. Ignored it launch_template_id is supplied. Terraform will only perform drift detection if a configuration value is provided.	number	20	no
ec2_ssh_key	SSH key pair name to use to access the worker nodes launced by Ocean	string	null	no
eks_cluster_id	EKS Cluster identifier	string	n/a	yes
enabled	Set to false to prevent the module from creating any resources	bool	null	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	string	null	no
existing_workers_role_policy_arns	List of existing policy ARNs that will be attached to the workers default role on creation	list(string)	[]	no
fallback_to_ondemand	If no Spot instance markets are available, enable Ocean to launch On-Demand instances instead.	bool	true	no
id_length_limit	Limit id to this many characters (minimum 6). Set to 0 for unlimited length. Set to null for keep the existing setting, which defaults to 0. Does not affect id_full.	number	null	no
instance_profile	The AWS Instance Profile to use for Spotinst Worker instances. If not set, one will be created.	string	null	no
instance_types	List of instance type to use for this node group. Defaults to null, which allows all instance types.	list(string)	null	no
kubelet_additional_options	Additional flags to pass to kubelet. DO NOT include --node-labels or --node-taints, use kubernetes_labels and kubernetes_taints to specify those."	string	""	no
kubernetes_labels	Key-value mapping of Kubernetes labels. Only labels that are applied with the EKS API are managed by this argument. Other Kubernetes labels applied to the EKS Node Group will not be managed.	map(string)	{}	no
kubernetes_taints	Key-value mapping of Kubernetes taints.	map(string)	{}	no
kubernetes_version	Kubernetes version. Required unless ami_image_id is provided.	string	null	no
label_key_case	Controls the letter case of the tags keys (label names) for tags generated by this module. Does not affect keys of tags passed in via the tags input. Possible values: lower, title, upper. Default value: title.	string	null	no
label_order	The order in which the labels (ID elements) appear in the id. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.	list(string)	null	no
label_value_case	Controls the letter case of ID elements (labels) as included in id, set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input. Possible values: lower, title, upper and none (no transformation). Set this to title and set delimiter to "" to yield Pascal Case IDs. Default value: lower.	string	null	no
labels_as_tags	Set of labels (ID elements) to include as tags in the tags output. Default is to include all labels. Tags with empty values will not be included in the tags output. Set to [] to suppress all generated tags. Notes: The value of the name tag, if included, will be the id, not the name. Unlike other null-label inputs, the initial setting of labels_as_tags cannot be changed in later chained modules. Attempts to change it will be silently ignored.	set(string)	[ "default" ]	no
max_size	The upper limit of worker nodes the Ocean cluster can scale up to	number	null	no
metadata_http_put_response_hop_limit	The desired HTTP PUT response hop limit (between 1 and 64) for instance metadata requests.	number	2	no
metadata_http_tokens_required	Whether or not the metadata service requires session tokens, also referred to as Instance Metadata Service Version 2.	bool	true	no
min_size	The lower limit of worker nodes the Ocean cluster can scale down to	number	1	no
module_depends_on	Can be any value desired. Module will wait for this value to be computed before creating node group.	any	null	no
name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag. The "name" tag is set to the full id string. There is no tag with the value of the name input.	string	null	no
namespace	ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique	string	null	no
ocean_controller_id	Ocean Cluster identifier, used by cluster controller to target this cluster. If unset, will use EKS cluster identifier	string	null	no
regex_replace_chars	Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.	string	null	no
region	AWS Region	string	n/a	yes
security_group_ids	List of security groups that will be attached to the autoscaling group	list(string)	n/a	yes
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	string	null	no
subnet_ids	A list of subnet IDs to launch resources in	list(string)	n/a	yes
tags	Additional tags (e.g. {'BusinessUnit': 'XYZ'}). Neither the tag keys nor the tag values will be modified by this module.	map(string)	{}	no
tenant	ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for	string	null	no
update_policy_batch_size_percentage	When rolling the cluster due to an update, the percentage of the instances to deploy in each batch.	number	25	no
update_policy_should_roll	If true, roll the cluster when its configuration is updated	bool	true	no
userdata_override_base64	Many features of this module rely on the bootstrap.sh provided with Amazon Linux, and this module may generate "user data" that expects to find that script. If you want to use an AMI that is not compatible with the Amazon Linux bootstrap.sh initialization, then use userdata_override_base64 to provide your own (Base64 encoded) user data. Use "" to prevent any user data from being set. Setting userdata_override_base64 disables kubernetes_taints, kubelet_additional_options, before_cluster_joining_userdata, after_cluster_joining_userdata, and bootstrap_additional_options.	string	null	no

Outputs

Name	Description
ocean_controller_id	The ID of the Ocean controller
ocean_id	The ID of the Ocean (o-123b567c), if created by this module (local.enabled)
worker_ami	The AMI ID that the worker instance uses, if determined by this module (var.ami_image_id == null)
worker_instance_profile_arn	The ARN of the profile for worker instances, if created by this module (var.instance_profile == null)
worker_instance_profile_name	The name of the profile for worker instances, if created by this module (var.instance_profile == null)
worker_role_arn	The ARN of the role for worker instances, if created by this module (var.instance_profile == null)
worker_role_name	The name of the role for worker instances, if created by this module (var.instance_profile == null)

Related Projects

Check out these related projects.

• terraform-aws-eks-cluster - Terraform module to provision an EKS cluster on AWS
• terraform-aws-eks-workers - Terraform module to provision an AWS AutoScaling Group, IAM Role, and Security Group for EKS Workers
• terraform-null-label - Terraform module designed to generate consistent names and tags for resources. Use terraform-null-label to implement a strict naming convention.

References

For additional context, refer to some of these links.

• Terraform Standard Module Structure - HashiCorp's standard module structure is a file and directory layout we recommend for reusable modules distributed in separate repositories.
• Terraform Module Requirements - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.
• Terraform Version Pinning - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration

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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

Licensed to the Apache Software Foundation (ASF) under one
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regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
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