Add Consul Helm chart for cluster

consul/README.md

@@ -0,0 +1,16 @@
+# Consul `doks`
+
+> This directory contains [Digital Ocean](https://registry.terraform.io/providers/digitalocean/digitalocean) Resources.
+
+## Requirements
+
+* Terraform CLI `1.0.8` or newer
+* a Digital Ocean [account](https://m.do.co/c/b73b4af31c09)
+
+## Deployment
+
+This deploys the following components to a Digital Ocean Kubernetes cluster.
+
+- Consul and Prometheus (via Helm chart)
+- Grafana (via Helm chart)
+- Jaeger (via Kubernetes resource)

consul/data-sources.tf

@@ -0,0 +1,18 @@
+# see https://www.terraform.io/docs/language/state/remote-state-data.html#example-usage-remote-backend-
+data "terraform_remote_state" "clusters" {
+  backend = "remote"
+
+  config = {
+    organization = "a-demo-organization"
+
+    workspaces = {
+      name = "multi-cloud-k8s-outputs"
+    }
+  }
+}
+
+# see https://registry.terraform.io/providers/digitalocean/digitalocean/latest/docs/data-sources/kubernetes_cluster
+data "digitalocean_kubernetes_cluster" "cluster" {
+  # dynamically retrieve the DOKS Cluster Name from Terraform State from the `outputs` Workspace
+  name = data.terraform_remote_state.clusters.outputs.clusters.doks.cluster_name
+}

consul/main.tf

@@ -0,0 +1,26 @@
+module "consul_on_doks" {
+  source = "./modules/consul"
+
+  providers = {
+    helm       = helm.doks
+    kubernetes = kubernetes.doks
+  }
+}
+
+module "grafana_on_doks" {
+  source = "./modules/grafana"
+
+  providers = {
+    helm       = helm.doks
+    kubernetes = kubernetes.doks
+  }
+}
+
+module "jaeger_on_doks" {
+  source = "./modules/jaeger"
+
+  providers = {
+    helm       = helm.doks
+    kubernetes = kubernetes.doks
+  }
+}

consul/modules/consul/README.md

@@ -0,0 +1,18 @@
+# Helm Deployment of HashiCorp Consul
+
+See [hashicorp/consul-k8s](https://github.com/hashicorp/consul-k8s) for more information.
+
+It enables the following:
+
+### Consul
+
+- Access control lists
+- Agent metrics
+- Proxy metrics
+- Transparent proxy
+- Consul UI at a load balancer
+- Controller for CRDs
+
+### Prometheus
+
+- For collecting metrics from applications and Consul.

consul/modules/consul/main.tf

@@ -0,0 +1,13 @@
+# see https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release
+resource "helm_release" "consul" {
+  chart      = "consul"
+  name       = "consul"
+  repository = "https://helm.releases.hashicorp.com/"
+
+  # see https://github.com/hashicorp/consul-k8s/tags
+  version = var.chart_version # NOTE: this is NOT the version of Consul to use
+
+  values = [
+    file("${path.module}/values.yml")
+  ]
+}

consul/modules/consul/providers.tf

@@ -0,0 +1,16 @@
+terraform {
+  # see https://www.terraform.io/docs/language/settings/index.html#specifying-provider-requirements
+  required_providers {
+    # see https://registry.terraform.io/providers/hashicorp/helm/2.3.0/docs
+    helm = {
+      source  = "hashicorp/helm"
+      version = "2.3.0"
+    }
+
+    # see https://registry.terraform.io/providers/hashicorp/kubernetes/2.5.0/docs
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "2.5.0"
+    }
+  }
+}

consul/modules/consul/values.yml

@@ -0,0 +1,31 @@
+---
+
+global:
+  name: consul
+  acls:
+    manageSystemACLs: true
+  metrics:
+    enabled: true
+    enableAgentMetrics: true
+
+prometheus:
+  enabled: true
+
+server:
+  replicas: 1
+
+client:
+  enabled: true
+
+connectInject:
+  enabled: true
+  transparentProxy:
+    defaultEnabled: true
+
+ui:
+  enabled: true
+  service:
+    type: LoadBalancer
+
+controller:
+  enabled: true

consul/modules/consul/variables.tf

@@ -0,0 +1,5 @@
+variable "chart_version" {
+  type        = string
+  description = "Specify the exact chart version to install."
+  default     = "0.34.1"
+}

consul/modules/grafana/README.md

@@ -0,0 +1,10 @@
+# Helm Deployment of Grafana
+
+See [grafana/helm-charts](https://github.com/grafana/helm-charts) for more information.
+
+It enables the following:
+
+### Grafana
+
+- Dashboard for [Kong API Gateway](https://grafana.com/grafana/dashboards/7424)
+- Dashboard for the [joatmon08/expense-report](https://github.com/joatmon08/expense-report/blob/main/grafana/app.json)

consul/modules/grafana/main.tf

@@ -0,0 +1,13 @@
+# see https://registry.terraform.io/providers/hashicorp/helm/latest/docs/resources/release
+resource "helm_release" "grafana" {
+  chart      = "grafana"
+  name       = "grafana"
+  repository = "https://grafana.github.io/helm-charts/"
+
+  # see https://github.com/grafana/helm-charts/tags
+  version = var.chart_version # NOTE: this is NOT the version of Grafana to use
+
+  values = [
+    file("${path.module}/values.yml")
+  ]
+}

consul/modules/grafana/providers.tf

@@ -0,0 +1,16 @@
+terraform {
+  # see https://www.terraform.io/docs/language/settings/index.html#specifying-provider-requirements
+  required_providers {
+    # see https://registry.terraform.io/providers/hashicorp/helm/2.3.0/docs
+    helm = {
+      source  = "hashicorp/helm"
+      version = "2.3.0"
+    }
+
+    # see https://registry.terraform.io/providers/hashicorp/kubernetes/2.5.0/docs
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "2.5.0"
+    }
+  }
+}

consul/modules/grafana/values.yml

@@ -0,0 +1,39 @@
+---
+
+adminPassword: password
+persistence:
+  enabled: true
+
+service:
+  type: LoadBalancer
+
+datasources:
+  datasources.yaml:
+    apiVersion: 1
+    datasources:
+    - name: Prometheus
+      type: prometheus
+      url: http://prometheus-server
+      access: proxy
+      isDefault: true
+
+dashboardProviders:
+  dashboardproviders.yaml:
+    apiVersion: 1
+    providers:
+    - name: 'default'
+      orgId: 1
+      folder: ''
+      type: file
+      disableDeletion: false
+      editable: true
+      options:
+        path: /var/lib/grafana/dashboards/default
+dashboards:
+  default:
+    kong-dash:
+      gnetId: 7424
+      revision: 5
+      datasource: Prometheus
+    app-dash:
+      url: https://raw.githubusercontent.com/joatmon08/expense-report/main/grafana/app.json

consul/modules/grafana/variables.tf

@@ -0,0 +1,5 @@
+variable "chart_version" {
+  type        = string
+  description = "Specify the exact chart version to install."
+  default     = "6.16.10"
+}

consul/modules/jaeger/README.md

@@ -0,0 +1,5 @@
+# Kubernetes Deployment of Jaeger All-in-One
+
+See [jaegertracing/jaeger-kubernetes](https://github.com/jaegertracing/jaeger-kubernetes/tree/master/all-in-one) for more information.
+
+It enables a Jaeger collector with an all-in-one deployment. Supports Zipkin HTTP spans.