Compose EKS monitoring modules (#115)

* Move modules around

* Update amp billing source

* Merge Java monitoring to EKS

* Update docs

* Merge nginx pattern

* Pre-commit

* Add save and test URL output

* Move EKS dependencies to EKS monitoring module

* update docs

* Update examples and docs

* Add java doc

* Add NGINX doc

* Update nginx doc

* Fix amp monitoring example path

* Fix pre-commit

* Todo: move to main after merge

* Update docs, fix tags

modules/eks-monitoring/patterns/java/README.md

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+# Java patterns module
+
+Provides monitoring for Java based workloads with the following resources:
+
+- AWS Managed Grafana Dashboard and data source
+- Alerts and recording rules with AWS Managed Service for Prometheus
+
+<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.1.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 4.0.0 |
+| <a name="requirement_grafana"></a> [grafana](#requirement\_grafana) | >= 1.25.0 |
+| <a name="requirement_helm"></a> [helm](#requirement\_helm) | >= 2.4.1 |
+| <a name="requirement_kubectl"></a> [kubectl](#requirement\_kubectl) | >= 1.14 |
+| <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | >= 2.10 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 4.0.0 |
+| <a name="provider_grafana"></a> [grafana](#provider\_grafana) | >= 1.25.0 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_prometheus_rule_group_namespace.alerting_rules](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/prometheus_rule_group_namespace) | resource |
+| [aws_prometheus_rule_group_namespace.recording_rules](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/prometheus_rule_group_namespace) | resource |
+| [grafana_dashboard.this](https://registry.terraform.io/providers/grafana/grafana/latest/docs/resources/dashboard) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_dashboards_folder_id"></a> [dashboards\_folder\_id](#input\_dashboards\_folder\_id) | Grafana folder ID for automatic dashboards | `string` | n/a | yes |
+| <a name="input_enable_alerting_rules"></a> [enable\_alerting\_rules](#input\_enable\_alerting\_rules) | Enables or disables Managed Prometheus alerting rules | `bool` | `true` | no |
+| <a name="input_managed_prometheus_workspace_id"></a> [managed\_prometheus\_workspace\_id](#input\_managed\_prometheus\_workspace\_id) | Amazon Managed Prometheus Workspace ID | `string` | `null` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| <a name="output_grafana_dashboard_urls"></a> [grafana\_dashboard\_urls](#output\_grafana\_dashboard\_urls) | URLs for dashboards created |
+<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

modules/eks-monitoring/patterns/java/main.tf

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+resource "aws_prometheus_rule_group_namespace" "recording_rules" {
+  name         = "accelerator-java-rules"
+  workspace_id = var.managed_prometheus_workspace_id
+  data         = <<EOF
+groups:
+  - name: default-metric
+    rules:
+      - record: metric:recording_rule
+        expr: avg(rate(container_cpu_usage_seconds_total[5m]))
+EOF
+}
+
+resource "aws_prometheus_rule_group_namespace" "alerting_rules" {
+  count = var.enable_alerting_rules ? 1 : 0
+
+  name         = "accelerator-java-alerting"
+  workspace_id = var.managed_prometheus_workspace_id
+  data         = <<EOF
+groups:
+  - name: default-alert
+    rules:
+      - alert: metric:alerting_rule
+        expr: jvm_memory_bytes_used{job="java", area="heap"} / jvm_memory_bytes_max * 100 > 80
+        for: 1m
+        labels:
+            severity: warning
+        annotations:
+            summary: "JVM heap warning"
+            description: "JVM heap of instance `{{$labels.instance}}` from application `{{$labels.application}}` is above 80% for one minute. (current=`{{$value}}%`)"
+EOF
+}
+
+resource "grafana_dashboard" "this" {
+  folder      = var.dashboards_folder_id
+  config_json = file("${path.module}/dashboards/default.json")
+}

modules/eks-monitoring/patterns/java/outputs.tf

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+output "grafana_dashboard_urls" {
+  value = [concat(
+    grafana_dashboard.this[*].url,
+  )]
+  description = "URLs for dashboards created"
+}

modules/eks-monitoring/patterns/java/variables.tf

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+variable "enable_alerting_rules" {
+  description = "Enables or disables Managed Prometheus alerting rules"
+  type        = bool
+  default     = true
+}
+
+variable "managed_prometheus_workspace_id" {
+  description = "Amazon Managed Prometheus Workspace ID"
+  type        = string
+  default     = null
+}
+
+variable "dashboards_folder_id" {
+  description = "Grafana folder ID for automatic dashboards"
+  type        = string
+}

modules/eks-monitoring/patterns/java/versions.tf

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+terraform {
+  required_version = ">= 1.1.0"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 4.0.0"
+    }
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = ">= 2.10"
+    }
+    kubectl = {
+      source  = "gavinbunney/kubectl"
+      version = ">= 1.14"
+    }
+    helm = {
+      source  = "hashicorp/helm"
+      version = ">= 2.4.1"
+    }
+    grafana = {
+      source  = "grafana/grafana"
+      version = ">= 1.25.0"
+    }
+  }
+}