aws-node-termination-handler

This component creates a Helm release for aws-node-termination-handler on a Kubernetes cluster. aws-node-termination-handler is a Kubernetes addon that (by default) monitors the EC2 IMDS endpoint for scheduled maintenance events, spot instance termination events, and rebalance recommendation events, and drains and/or cordons nodes upon such events. This ensures that workloads on Kubernetes are evicted gracefully when a node needs to be terminated.

Usage

Stack Level: Regional

Once the catalog file is created, the file can be imported as follows.

import:
  - catalog/eks/aws-node-termination-handler
  ...

The default catalog values

components:
  terraform:
    aws-node-termination-handler:
      backend:
        s3:
          workspace_key_prefix: aws-node-termination-handler
      vars:
        enabled: true
        chart_version: 0.15.3
        rbac_enabled: true

        # You can use `chart_values` to set any other chart options. Treat `chart_values` as the root of the doc.
        #
        # # For example
        # ---
        # chart_values:
        #   enableShield: false
        chart_values: {}

Requirements

Name	Version
terraform	>= 1.0.0
aws	>= 4.0
helm	>= 2.0
kubernetes	>= 2.0, != 2.21.0

Providers

Name	Version
aws	>= 4.0
kubernetes	>= 2.0, != 2.21.0

Modules

Name	Source	Version
aws_node_termination_handler	cloudposse/helm-release/aws	0.10.0
eks	cloudposse/stack-config/yaml//modules/remote-state	1.5.0
iam_roles	../../account-map/modules/iam-roles	n/a
this	cloudposse/label/null	0.25.0

Resources

Name	Type
kubernetes_namespace.default	resource
aws_eks_cluster_auth.eks	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
atomic	If set, installation process purges chart on fail. The wait flag will be set automatically if atomic is used.	bool	true	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
chart	Chart name to be installed. The chart name can be local path, a URL to a chart, or the name of the chart if repository is specified. It is also possible to use the <repository>/<chart> format here if you are running Terraform on a system that the repository has been added to with helm repo add but this is not recommended.	string	"aws-node-termination-handler"	no
chart_description	Set release description attribute (visible in the history).	string	null	no
chart_repository	Repository URL where to locate the requested chart.	string	"https://aws.github.io/eks-charts"	no
chart_values	Additional values to yamlencode as helm_release values.	any	{}	no
chart_version	Specify the exact chart version to install. If this is not specified, the latest version is installed.	string	"0.15.3"	no
cleanup_on_fail	Allow deletion of new resources created in this upgrade when upgrade fails.	bool	true	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
create_namespace	Create the namespace if it does not yet exist. Defaults to false.	bool	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
eks_component_name	The name of the eks component	string	"eks/cluster"	no
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
helm_manifest_experiment_enabled	Enable storing of the rendered manifest for helm_release so the full diff of what is changing can been seen in the plan	bool	false	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
kube_data_auth_enabled	If true, use an aws_eks_cluster_auth data source to authenticate to the EKS cluster. Disabled by kubeconfig_file_enabled or kube_exec_auth_enabled.	bool	false	no
kube_exec_auth_aws_profile	The AWS config profile for aws eks get-token to use	string	""	no
kube_exec_auth_aws_profile_enabled	If true, pass kube_exec_auth_aws_profile as the profile to aws eks get-token	bool	false	no
kube_exec_auth_enabled	If true, use the Kubernetes provider exec feature to execute aws eks get-token to authenticate to the EKS cluster. Disabled by kubeconfig_file_enabled, overrides kube_data_auth_enabled.	bool	true	no
kube_exec_auth_role_arn	The role ARN for aws eks get-token to use	string	""	no
kube_exec_auth_role_arn_enabled	If true, pass kube_exec_auth_role_arn as the role ARN to aws eks get-token	bool	true	no
kubeconfig_context	Context to choose from the Kubernetes config file. If supplied, kubeconfig_context_format will be ignored.	string	""	no
kubeconfig_context_format	A format string to use for creating the kubectl context name when kubeconfig_file_enabled is true and kubeconfig_context is not supplied. Must include a single %s which will be replaced with the cluster name.	string	""	no
kubeconfig_exec_auth_api_version	The Kubernetes API version of the credentials returned by the exec auth plugin	string	"client.authentication.k8s.io/v1beta1"	no
kubeconfig_file	The Kubernetes provider config_path setting to use when kubeconfig_file_enabled is true	string	""	no
kubeconfig_file_enabled	If true, configure the Kubernetes provider with kubeconfig_file and use that kubeconfig file for authenticating to the EKS cluster	bool	false	no
kubernetes_namespace	The namespace to install the release into.	string	n/a	yes
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
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
rbac_enabled	Service Account for pods.	bool	true	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
resources	The cpu and memory of the deployment's limits and requests.	object({ limits = object({ cpu = string memory = string }) requests = object({ cpu = string memory = string }) })	{ "limits": { "cpu": "100m", "memory": "128Mi" }, "requests": { "cpu": "50m", "memory": "64Mi" } }	no
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	string	null	no
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
timeout	Time in seconds to wait for any individual kubernetes operation (like Jobs for hooks). Defaults to 300 seconds	number	null	no
wait	Will wait until all resources are in a ready state before marking the release as successful. It will wait for as long as timeout. Defaults to true.	bool	null	no

Outputs

Name	Description
metadata	Block status of the deployed release

References

• aws-node-termination-handler - Helm Chart
• aws-node-termination-handler - AWS Node Termination Handler