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feat: add module to install otel in eks cluster (#30)
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‎modules/integrations/splunk_otel_eks/README.md‎

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<!-- BEGIN_TF_DOCS -->
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## Requirements
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| Name | Version |
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|------|---------|
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| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.9.1 |
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| <a name="requirement_aws"></a> [aws](#requirement\_aws) | ~> 5.90 |
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| <a name="requirement_helm"></a> [helm](#requirement\_helm) | 2.17.0 |
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| <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | 2.36.0 |
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## Providers
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| Name | Version |
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|------|---------|
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| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.99.1 |
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| <a name="provider_helm"></a> [helm](#provider\_helm) | 2.17.0 |
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## Modules
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No modules.
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## Resources
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| Name | Type |
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|------|------|
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| [helm_release.splunk_otel_collector](https://registry.terraform.io/providers/hashicorp/helm/2.17.0/docs/resources/release) | resource |
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| [aws_eks_cluster.cluster](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/eks_cluster) | data source |
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| [aws_eks_cluster_auth.cluster](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/eks_cluster_auth) | data source |
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| [aws_secretsmanager_secret.secrets](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/secretsmanager_secret) | data source |
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| [aws_secretsmanager_secret_version.secrets](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/secretsmanager_secret_version) | data source |
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## Inputs
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| Name | Description | Type | Default | Required |
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|------|-------------|------|---------|:--------:|
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| <a name="input_aws_profile"></a> [aws\_profile](#input\_aws\_profile) | AWS profile to use. | `string` | n/a | yes |
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| <a name="input_aws_region"></a> [aws\_region](#input\_aws\_region) | Default AWS region. | `string` | n/a | yes |
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| <a name="input_cluster_name"></a> [cluster\_name](#input\_cluster\_name) | The name of the EKS cluster | `string` | n/a | yes |
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| <a name="input_default_tags"></a> [default\_tags](#input\_default\_tags) | A map of tags to apply to resources. | `map(string)` | n/a | yes |
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| <a name="input_splunk_otel_collector"></a> [splunk\_otel\_collector](#input\_splunk\_otel\_collector) | Configuration for the Splunk OpenTelemetry Collector | <pre>object({<br/> splunk_observability_realm = string<br/> splunk_platform_endpoint = string<br/> splunk_platform_index = string<br/> gateway = bool<br/> splunk_observability_profiling = bool<br/> environment = string<br/> discovery = bool<br/> })</pre> | n/a | yes |
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## Outputs
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No outputs.
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<!-- END_TF_DOCS -->

‎modules/integrations/splunk_otel_eks/backend.tf‎

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terraform {
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# Intentionally empty. Will be filled by Terragrunt.
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backend "s3" {}
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}

‎modules/integrations/splunk_otel_eks/data.tf‎

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data "aws_eks_cluster" "cluster" {
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name = var.cluster_name
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}
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data "aws_eks_cluster_auth" "cluster" {
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name = var.cluster_name
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}

‎modules/integrations/splunk_otel_eks/otel.tf‎

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resource "helm_release" "splunk_otel_collector" {
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name = "splunk-otel-collector"
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repository = "https://signalfx.github.io/splunk-otel-collector-chart"
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chart = "splunk-otel-collector"
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version = "0.122.0"
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namespace = "splunk-otel-collector"
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create_namespace = true
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set {
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name = "cloudProvider"
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value = "aws"
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}
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set {
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name = "distribution"
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value = "eks"
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}
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set {
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name = "splunkObservability.accessToken"
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value = data.aws_secretsmanager_secret_version.secrets["splunk_access_ingest_token"].secret_string
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}
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set {
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name = "clusterName"
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value = var.cluster_name
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}
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set {
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name = "splunkObservability.realm"
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value = var.splunk_otel_collector.splunk_observability_realm
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}
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set {
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name = "splunkPlatform.endpoint"
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value = var.splunk_otel_collector.splunk_platform_endpoint
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}
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set {
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name = "splunkPlatform.index"
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value = var.splunk_otel_collector.splunk_platform_index
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}
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set {
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name = "splunkPlatform.token"
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value = data.aws_secretsmanager_secret_version.secrets["splunk_cloud_hec_token_eks"].secret_string
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}
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set {
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name = "gateway.enabled"
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value = var.splunk_otel_collector.gateway
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}
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set {
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name = "splunkObservability.profilingEnabled"
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value = var.splunk_otel_collector.splunk_observability_profiling
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}
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set {
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name = "environment"
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value = var.splunk_otel_collector.environment
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}
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set {
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name = "agent.discovery.enabled"
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value = var.splunk_otel_collector.discovery
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}
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}

‎modules/integrations/splunk_otel_eks/providers.tf‎

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# Re-use AWS settings from root module.
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provider "aws" {
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region = var.aws_region
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profile = var.aws_profile
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# Required, as per security guidelines.
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default_tags {
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tags = var.default_tags
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}
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}
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provider "kubernetes" {
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host = data.aws_eks_cluster.cluster.endpoint
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cluster_ca_certificate = base64decode(data.aws_eks_cluster.cluster.certificate_authority[0].data)
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token = data.aws_eks_cluster_auth.cluster.token
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}
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provider "helm" {
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kubernetes {
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host = data.aws_eks_cluster.cluster.endpoint
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cluster_ca_certificate = base64decode(data.aws_eks_cluster.cluster.certificate_authority[0].data)
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token = data.aws_eks_cluster_auth.cluster.token
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}
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}

‎modules/integrations/splunk_otel_eks/secrets.tf‎

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locals {
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secrets = {
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splunk_access_ingest_token = {
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name = "/app/tf/splunk_access_ingest_token"
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}
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splunk_cloud_hec_token_eks = {
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name = "/app/tf/splunk_cloud_hec_token_eks"
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}
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}
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}
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data "aws_secretsmanager_secret" "secrets" {
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for_each = local.secrets
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name = each.value.name
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}
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data "aws_secretsmanager_secret_version" "secrets" {
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for_each = data.aws_secretsmanager_secret.secrets
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secret_id = each.value.id
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}

‎modules/integrations/splunk_otel_eks/variables.tf‎

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variable "aws_profile" {
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type = string
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description = "AWS profile to use."
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}
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variable "aws_region" {
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type = string
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description = "Default AWS region."
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}
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variable "cluster_name" {
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description = "The name of the EKS cluster"
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type = string
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}
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variable "splunk_otel_collector" {
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description = "Configuration for the Splunk OpenTelemetry Collector"
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type = object({
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splunk_observability_realm = string
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splunk_platform_endpoint = string
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splunk_platform_index = string
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gateway = bool
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splunk_observability_profiling = bool
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environment = string
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discovery = bool
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})
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}
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variable "default_tags" {
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type = map(string)
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description = "A map of tags to apply to resources."
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}

‎modules/integrations/splunk_otel_eks/versions.tf‎

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terraform {
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# Provider versions.
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required_providers {
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aws = {
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source = "hashicorp/aws"
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version = "~> 5.90"
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}
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helm = {
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source = "hashicorp/helm"
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version = "2.17.0"
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}
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kubernetes = {
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source = "hashicorp/kubernetes"
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version = "2.36.0"
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}
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}
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# OpenTofu version.
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required_version = ">= 1.9.1"
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}

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