Add EKS Istio Dashboards (#194)

* Update readme

* checking in new readme example

* new istio readme

* Updated mkdocs.yml

* checking in readme files

* checking in all changes

* Test

* Test

* Test

* Testing

* Testing

* test

* Update main.tf

* Update outputs.tf

* Adding Istio dashboards

* Updating URL's

* Removing dashboards

* Updates from pre-commit

* Update istio.md

* Removing empty file

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update README.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update README.md

* Update README.md

* Istio Documentation Updates

Added istioctl prereq, updated dashboards image

* Updated setup and cleanup of Istio Bookinfo

Updated Istio Bookinfo sample app instructions, included clean up of Bookinfo resources

* Updating image and removing advanced configuration

-Switching image to Github generated link
-Removing advanced configuration section

---------

Co-authored-by: Prithvi Reddy <ypreddy@amazon.com>
Co-authored-by: Prithvi Reddy <47993564+preddy727@users.noreply.github.com>

modules/eks-monitoring/variables.tf

@@ -305,6 +305,40 @@ variable "nginx_config" {
   default = null
 }
 
+variable "enable_istio" {
+  description = "Enable ISTIO workloads monitoring, alerting and default dashboards"
+  type        = bool
+  default     = false
+}
+
+
+variable "istio_config" {
+  description = "Configuration object for ISTIO monitoring"
+  type = object({
+    enable_alerting_rules  = bool
+    enable_recording_rules = bool
+    enable_dashboards      = bool
+    scrape_sample_limit    = number
+
+    flux_gitrepository_name   = string
+    flux_gitrepository_url    = string
+    flux_gitrepository_branch = string
+    flux_kustomization_name   = string
+    flux_kustomization_path   = string
+
+    grafana_url                             = string
+    grafana_istio_cp_dashboard_url          = string
+    grafana_istio_mesh_dashboard_url        = string
+    grafana_istio_performance_dashboard_url = string
+    grafana_istio_service_dashboard_url     = string
+
+    prometheus_metrics_endpoint = string
+  })
+
+  # defaults are pre-computed in locals.tf, provide a full definition to override
+  default = null
+}
+
 variable "enable_logs" {
   description = "Using AWS For FluentBit to collect cluster and application logs to Amazon CloudWatch"
   type        = bool