# Infrastructure monitoring This module provides EKS cluster monitoring with the following resources: - AWS Distro For OpenTelemetry Operator and Collector for Metrics and Traces - Logs with [AWS for FluentBit](https://github.com/aws/aws-for-fluent-bit) - Installs Grafana Operator to add AWS data sources and create Grafana Dashboards to Amazon Managed Grafana. - Installs FluxCD to perform GitOps sync of a Git Repo to EKS Cluster. We will use this later for creating Grafana Dashboards and AWS datasources to Amazon Managed Grafana. - Installs External Secrets Operator to retrieve and Sync the Grafana API keys. - Amazon Managed Grafana Dashboard and data source - Alerts and recording rules with AWS Managed Service for Prometheus This module makes use of the open source [kube-prometheus-stack](https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack) ## Requirements | Name | Version | |------|---------| | [terraform](#requirement\_terraform) | >= 1.1.0 | | [aws](#requirement\_aws) | >= 4.0.0 | | [grafana](#requirement\_grafana) | >= 1.25.0 | | [helm](#requirement\_helm) | >= 2.4.1 | | [kubectl](#requirement\_kubectl) | >= 1.14 | | [kubernetes](#requirement\_kubernetes) | >= 2.10 | ## Providers | Name | Version | |------|---------| | [aws](#provider\_aws) | >= 4.0.0 | | [helm](#provider\_helm) | >= 2.4.1 | | [kubectl](#provider\_kubectl) | >= 1.14 | ## Modules | Name | Source | Version | |------|--------|---------| | [external\_secrets](#module\_external\_secrets) | ./add-ons/external-secrets | n/a | | [fluentbit\_logs](#module\_fluentbit\_logs) | ./add-ons/aws-for-fluentbit | n/a | | [helm\_addon](#module\_helm\_addon) | github.com/aws-ia/terraform-aws-eks-blueprints//modules/kubernetes-addons/helm-addon | v4.32.0 | | [java\_monitoring](#module\_java\_monitoring) | ./patterns/java | n/a | | [nginx\_monitoring](#module\_nginx\_monitoring) | ./patterns/nginx | n/a | | [operator](#module\_operator) | ./add-ons/adot-operator | n/a | ## 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 | | [helm_release.fluxcd](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource | | [helm_release.grafana_operator](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource | | [helm_release.kube_state_metrics](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource | | [helm_release.prometheus_node_exporter](https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release) | resource | | [kubectl_manifest.flux_gitrepository](https://registry.terraform.io/providers/gavinbunney/kubectl/latest/docs/resources/manifest) | resource | | [kubectl_manifest.flux_kustomization](https://registry.terraform.io/providers/gavinbunney/kubectl/latest/docs/resources/manifest) | resource | | [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source | | [aws_eks_cluster.eks_cluster](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/eks_cluster) | data source | | [aws_partition.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/partition) | data source | | [aws_region.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/region) | data source | ## Inputs | Name | Description | Type | Default | Required | |------|-------------|------|---------|:--------:| | [custom\_metrics\_config](#input\_custom\_metrics\_config) | Configuration object to enable custom metrics collection |

object({
    ports = list(number)
    # paths = optional(list(string), ["/metrics"])
    # list of samples to be dropped by label prefix, ex: go_ -> discards go_.*
    dropped_series_prefixes = list(string)
  })

{
  "dropped_series_prefixes": [
    "unspecified"
  ],
  "ports": []
}

object({
    create_namespace   = bool
    k8s_namespace      = string
    helm_chart_name    = string
    helm_chart_version = string
    helm_release_name  = string
    helm_repo_url      = string
    helm_settings      = map(string)
    helm_values        = map(any)
  })

{
  "create_namespace": true,
  "helm_chart_name": "flux2",
  "helm_chart_version": "2.7.0",
  "helm_release_name": "observability-fluxcd-addon",
  "helm_repo_url": "https://fluxcd-community.github.io/helm-charts",
  "helm_settings": {},
  "helm_values": {},
  "k8s_namespace": "flux-system"
}

object({
    create_namespace   = bool
    helm_chart         = string
    helm_name          = string
    k8s_namespace      = string
    helm_release_name  = string
    helm_chart_version = string
  })

{
  "create_namespace": true,
  "helm_chart": "oci://ghcr.io/grafana-operator/helm-charts/grafana-operator",
  "helm_chart_version": "v5.0.0-rc1",
  "helm_name": "grafana-operator",
  "helm_release_name": "grafana-operator",
  "k8s_namespace": "grafana-operator"
}

| no | | [grafana\_api\_key](#input\_grafana\_api\_key) | Grafana API key for the Amazon Managed Grafana workspace | `string` | n/a | yes | | [grafana\_cluster\_dashboard\_url](#input\_grafana\_cluster\_dashboard\_url) | Dashboard URL for Cluster Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/1d731aca31cdeb26e9fe9d017e609a5ba1621a30/artifacts/grafana-dashboards/cluster.json"` | no | | [grafana\_kubelet\_dashboard\_url](#input\_grafana\_kubelet\_dashboard\_url) | Dashboard URL for Kubelet Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/1d731aca31cdeb26e9fe9d017e609a5ba1621a30/artifacts/grafana-dashboards/kubelet.json"` | no | | [grafana\_namespace\_workloads\_dashboard\_url](#input\_grafana\_namespace\_workloads\_dashboard\_url) | Dashboard URL for Namespace Workloads Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/1d731aca31cdeb26e9fe9d017e609a5ba1621a30/artifacts/grafana-dashboards/namespace-workloads.json"` | no | | [grafana\_node\_exporter\_dashboard\_url](#input\_grafana\_node\_exporter\_dashboard\_url) | Dashboard URL for Node Exporter Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/main/artifacts/grafana-dashboards/nodeexporter-nodes.json"` | no | | [grafana\_nodes\_dashboard\_url](#input\_grafana\_nodes\_dashboard\_url) | Dashboard URL for Nodes Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/1d731aca31cdeb26e9fe9d017e609a5ba1621a30/artifacts/grafana-dashboards/nodes.json"` | no | | [grafana\_url](#input\_grafana\_url) | Endpoint URL of Amazon Managed Grafana workspace | `string` | n/a | yes | | [grafana\_workloads\_dashboard\_url](#input\_grafana\_workloads\_dashboard\_url) | Dashboard URL for Workloads Grafana Dashboard JSON | `string` | `"https://raw.githubusercontent.com/aws-observability/aws-observability-accelerator/1d731aca31cdeb26e9fe9d017e609a5ba1621a30/artifacts/grafana-dashboards/workloads.json"` | no | | [helm\_config](#input\_helm\_config) | Helm Config for Prometheus | `any` | `{}` | no | | [irsa\_iam\_permissions\_boundary](#input\_irsa\_iam\_permissions\_boundary) | IAM permissions boundary for IRSA roles | `string` | `null` | no | | [irsa\_iam\_role\_path](#input\_irsa\_iam\_role\_path) | IAM role path for IRSA roles | `string` | `"/"` | no | | [java\_config](#input\_java\_config) | Configuration object for Java/JMX monitoring |

object({
    enable_alerting_rules  = bool
    enable_recording_rules = bool
    scrape_sample_limit    = number
  })

{
  "enable_alerting_rules": true,
  "enable_recording_rules": true,
  "scrape_sample_limit": 1000
}

object({
    create_namespace   = bool
    k8s_namespace      = string
    helm_chart_name    = string
    helm_chart_version = string
    helm_release_name  = string
    helm_repo_url      = string
    helm_settings      = map(string)
    helm_values        = map(any)

    scrape_interval = string
    scrape_timeout  = string
  })

{
  "create_namespace": true,
  "helm_chart_name": "kube-state-metrics",
  "helm_chart_version": "4.24.0",
  "helm_release_name": "kube-state-metrics",
  "helm_repo_url": "https://prometheus-community.github.io/helm-charts",
  "helm_settings": {},
  "helm_values": {},
  "k8s_namespace": "kube-system",
  "scrape_interval": "60s",
  "scrape_timeout": "15s"
}

object({
    cw_log_retention_days = number
  })

{
  "cw_log_retention_days": 90
}

object({
    create_namespace   = bool
    k8s_namespace      = string
    helm_chart_name    = string
    helm_chart_version = string
    helm_release_name  = string
    helm_repo_url      = string
    helm_settings      = map(string)
    helm_values        = map(any)

    scrape_interval = string
    scrape_timeout  = string
  })

{
  "create_namespace": true,
  "helm_chart_name": "prometheus-node-exporter",
  "helm_chart_version": "4.14.0",
  "helm_release_name": "prometheus-node-exporter",
  "helm_repo_url": "https://prometheus-community.github.io/helm-charts",
  "helm_settings": {},
  "helm_values": {},
  "k8s_namespace": "prometheus-node-exporter",
  "scrape_interval": "60s",
  "scrape_timeout": "60s"
}

object({
    enable_alerting_rules       = bool
    scrape_sample_limit         = number
    prometheus_metrics_endpoint = string
  })

{
  "enable_alerting_rules": true,
  "prometheus_metrics_endpoint": "metrics",
  "scrape_sample_limit": 1000
}

| no | | [prometheus\_config](#input\_prometheus\_config) | Controls default values such as scrape interval, timeouts and ports globally |

object({
    global_scrape_interval = string
    global_scrape_timeout  = string
  })

{
  "global_scrape_interval": "60s",
  "global_scrape_timeout": "15s"
}

| no | | [tags](#input\_tags) | Additional tags (e.g. `map('BusinessUnit`,`XYZ`) | `map(string)` | `{}` | no | | [target\_secret\_name](#input\_target\_secret\_name) | Target secret in Kubernetes to store the Grafana API Key Secret | `string` | `"grafana-admin-credentials"` | no | | [target\_secret\_namespace](#input\_target\_secret\_namespace) | Target namespace of secret in Kubernetes to store the Grafana API Key Secret | `string` | `"grafana-operator"` | no | | [tracing\_config](#input\_tracing\_config) | Configuration object for traces collection to AWS X-Ray |

object({
    otlp_grpc_endpoint = string
    otlp_http_endpoint = string
    send_batch_size    = number
    timeout            = string
  })

{
  "otlp_grpc_endpoint": "0.0.0.0:4317",
  "otlp_http_endpoint": "0.0.0.0:4318",
  "send_batch_size": 50,
  "timeout": "30s"
}

| no | ## Outputs | Name | Description | |------|-------------| | [eks\_cluster\_id](#output\_eks\_cluster\_id) | EKS Cluster Id | | [eks\_cluster\_version](#output\_eks\_cluster\_version) | EKS Cluster version | | [grafana\_dashboard\_urls](#output\_grafana\_dashboard\_urls) | URLs for dashboards created | ## Troubleshooting 1. When you upgrade the eks-monitoring module from v2.1.0 or earlier, the following error may occur. ```bash Error: cannot patch "prometheus-node-exporter" with kind DaemonSet: DaemonSet.apps "prometheus-node-exporter" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string{"app.kubernetes.io/instance":"prometheus-node-exporter", "app.kubernetes.io/name":"prometheus-node-exporter"}, MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable ``` This is due to the upgrade of the node-exporter chart from v2 to v4. Manually delete the node-exporter's DaemonSet as described in [the link here](https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-node-exporter#3x-to-4x), and then apply. ```bash kubectl -n prometheus-node-exporter delete daemonset -l app=prometheus-node-exporter terraform apply ``` 2. In case you dont see the grafana dashboards in your Amazon Managed Grafana console, check on the logs on your grafana operator pod using the below command : ```bash kubectl get pods -n grafana-operator ``` Output: ``` NAME READY STATUS RESTARTS AGE grafana-operator-866d4446bb-nqq5c 1/1 Running 0 3h17m ``` ```bash kubectl logs grafana-operator-866d4446bb-nqq5c -n grafana-operator ``` Output: ``` 1.6857285045556655e+09 ERROR error reconciling datasource {"controller": "grafanadatasource", "controllerGroup": "grafana.integreatly.org", "controllerKind": "GrafanaDatasource", "GrafanaDatasource": {"name":"grafanadatasource-sample-amp","namespace":"grafana-operator"}, "namespace": "grafana-operator", "name": "grafanadatasource-sample-amp", "reconcileID": "72cfd60c-a255-44a1-bfbd-88b0cbc4f90c", "datasource": "grafanadatasource-sample-amp", "grafana": "external-grafana", "error": "status: 401, body: {\"message\":\"Expired API key\"}\n"} github.com/grafana-operator/grafana-operator/controllers.(*GrafanaDatasourceReconciler).Reconcile ``` If you observe, the the above `grafana-api-key error` in the logs, your grafana API key is expired. Please use the operational procedure to update your `grafana-api-key` : - First, lets create a new Grafana API key. ```bash export GO_AMG_API_KEY=$(aws grafana create-workspace-api-key \ --key-name "grafana-operator-key-new" \ --key-role "ADMIN" \ --seconds-to-live 432000 \ --workspace-id \ --query key \ --output text) ``` - Next, lets grab the Grafana API key secret name from AWS Secrets Manager. The keyname should start with `terraform-..` ```bash aws secretsmanager list-secrets ``` - Finally, update the Grafana API key secret in AWS Secrets Manager using the above new Grafana API key: ```bash aws secretsmanager update-secret \ --secret-id \ --secret-string "${GO_AMG_API_KEY}" \ --region ``` ## Grafana datasources and dashboards via GitOps on Amazon Managed Grafana We have upgraded out solution to use [grafana-operator](https://github.com/grafana-operator/grafana-operator#:~:text=The%20grafana%2Doperator%20is%20a,an%20easy%20and%20scalable%20way.) and [Flux](https://fluxcd.io/) to create Grafana datasources, folder and dashboards via GitOps on Amazon Managed Grafana. The grafana-operator is a Kubernetes operator built to help you manage your Grafana instances inside and outside Kubernetes. Grafana Operator makes it possible for you to manage and create Grafana dashboards, datasources etc. declaratively between multiple instances in an easy and scalable way. Using grafana-operator it will be possible to add AWS data sources such as Amazon Managed Service for Prometheus, Amazon CloudWatch, AWS X-Ray to Amazon Managed Grafana and create Grafana dashboards on Amazon Managed Grafana from your Amazon EKS cluster. This enables us to use our Kubernetes cluster to create and manage the lifecycle of resources in Amazon Managed Grafana in a Kubernetes native way. This ultimately enables us to use GitOps mechanisms using CNCF projects such as Flux to create and manage the lifecycle of resources in Amazon Managed Grafana. GitOps is a way of managing application and infrastructure deployment so that the whole system is described declaratively in a Git repository. It is an operational model that offers you the ability to manage the state of multiple Kubernetes clusters leveraging the best practices of version control, immutable artifacts, and automation. Flux is a declarative, GitOps-based continuous delivery tool that can be integrated into any CI/CD pipeline. It gives users the flexibility of choosing their Git provider (GitHub, GitLab, BitBucket). Now, with grafana-operator supporting the management of external Grafana instances such as Amazon Managed Grafana, operations personas can use GitOps mechanisms using CNCF projects such as Flux to create and manage the lifecycle of resources in Amazon Managed Grafana. We have setup a [GitRepository](https://fluxcd.io/flux/components/source/gitrepositories/) and [Kustomization](https://fluxcd.io/flux/components/kustomize/kustomization/) using flux to sync our GitHub Repository to add Grafana Datasources, folder and Dashboards to Amazon Managed Grafana using Grafana Operator. GitRepository defines a Source to produce an Artifact for a Git repository revision. Kustomization defines a pipeline for fetching, decrypting, building, validating and applying Kustomize overlays or plain Kubernetes manifests. we are also using [Flux Post build variable substitution](https://fluxcd.io/flux/components/kustomize/kustomization/#post-build-variable-substitution) to dynamically render variables such as AMG_AWS_REGION, AMP_ENDPOINT_URL, AMG_ENDPOINT_URL,GRAFANA_NODEEXP_DASH_URL on the YAML manifests during deployment time to avoid hardcoding on the YAML manifests stored in Git repo. We have placed our declarative code snippet to create an Amazon Managed Service For Promethes datasource and Grafana Dashboard in Amazon Managed Grafana in our [AWS Observabiity Accelerator GitHub Repository](https://github.com/aws-observability/aws-observability-accelerator/tree/main/artifacts/grafana-operator-manifests). We have setup a GitRepository to point to the AWS Observabiity Accelerator GitHub Repository and `Kustomization` for flux to sync Git Repository with artifacts in `./artifacts/grafana-operator-manifests` path in the AWS Observabiity Accelerator GitHub Repository. You can use this extension of our solution to point your own Kubernetes manifests to create Grafana Datasources and personified Grafana Dashboards of your choice using GitOps with Grafana Operator and Flux in Kubernetes native way with altering and redeploying this solution for changes to Grafana resources.