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terraform-aws-eks-spotinst-ocean-nodepool

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Cloud Posse

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

This project is part of our comprehensive "SweetOps" approach towards DevOps.

Terraform Open Source Modules

It's 100% Open Source and licensed under the APACHE2.

We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!

Security & Compliance

Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.

Benchmark Description
Infrastructure Security Infrastructure Security Compliance
CIS KUBERNETES Center for Internet Security, KUBERNETES Compliance
CIS AWS Center for Internet Security, AWS Compliance
CIS AZURE Center for Internet Security, AZURE Compliance
PCI-DSS Payment Card Industry Data Security Standards Compliance
NIST-800-53 National Institute of Standards and Technology Compliance
ISO27001 Information Security Management System, ISO/IEC 27001 Compliance
SOC2 Service Organization Control 2 Compliance
CIS GCP Center for Internet Security, GCP Compliance
HIPAA Health Insurance Portability and Accountability Compliance

Usage

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

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
}

Examples

Here is an 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)

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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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Copyrights

Copyright © 2020-2022 Cloud Posse, LLC

License

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
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  https://www.apache.org/licenses/LICENSE-2.0

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Contributors

Erik Osterman
Erik Osterman

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