From 699afe20c86fcf16014c72351b64dbe6e7352389 Mon Sep 17 00:00:00 2001
From: Scott Murray <scott@murray.kiwi>
Date: Sat, 29 Jul 2023 15:18:44 +1200
Subject: [PATCH] add monitoring stack

---
 Makefile                       | 16 +++++++
 stacks/monitoring/Pulumi.yaml  |  5 ++
 stacks/monitoring/grafana.yaml | 88 ++++++++++++++++++++++++++++++++++
 stacks/monitoring/main.go      | 45 +++++++++++++++++
 4 files changed, 154 insertions(+)
 create mode 100644 stacks/monitoring/Pulumi.yaml
 create mode 100644 stacks/monitoring/grafana.yaml
 create mode 100644 stacks/monitoring/main.go

diff --git a/Makefile b/Makefile
index b65f522..29d2c52 100644
--- a/Makefile
+++ b/Makefile
@@ -38,10 +38,26 @@ apps-up:
 apps-down:
 	cd stacks/applications && pulumi stack select "applications" -c && pulumi destroy -y
 
+.PHONY: monitoring-preview
+monitoring-preview:
+	cd stacks/monitoring && pulumi stack select "monitoring" -c && pulumi preview
+
+.PHONY: monitoring-up
+monitoring-up:
+	cd stacks/monitoring && pulumi stack select "monitoring" -c && pulumi up
+
+.PHONY: monitoring-down
+monitoring-down:
+	cd stacks/monitoring && pulumi stack select "monitoring" -c && pulumi destroy -y
+
 .PHONY: load-config
 load-config:
 	cd stacks/cluster && pulumi stack output kubeconfig --show-secrets > $$HOME/.kube/config
 
+.PHONY: grafana
+grafana:
+	kubectl port-forward -n monitoring svc/grafana 3000:3000
+
 .PHONY: nuke
 nuke:
 	./kubernetes/resources/nuke.sh
diff --git a/stacks/monitoring/Pulumi.yaml b/stacks/monitoring/Pulumi.yaml
new file mode 100644
index 0000000..b6571cd
--- /dev/null
+++ b/stacks/monitoring/Pulumi.yaml
@@ -0,0 +1,5 @@
+name: meshed
+runtime:
+  name: go
+description: A collection of monitoring applications
+
diff --git a/stacks/monitoring/grafana.yaml b/stacks/monitoring/grafana.yaml
new file mode 100644
index 0000000..d7f6cac
--- /dev/null
+++ b/stacks/monitoring/grafana.yaml
@@ -0,0 +1,88 @@
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: grafana-pvc
+  namespace: monitoring
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: grafana
+  name: grafana
+  namespace: monitoring
+spec:
+  selector:
+    matchLabels:
+      app: grafana
+  template:
+    metadata:
+      labels:
+        app: grafana
+    spec:
+      securityContext:
+        fsGroup: 472
+        supplementalGroups:
+          - 0
+      containers:
+        - name: grafana
+          image: grafana/grafana:9.1.0
+          imagePullPolicy: IfNotPresent
+          ports:
+            - containerPort: 3000
+              name: http-grafana
+              protocol: TCP
+          readinessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /robots.txt
+              port: 3000
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 30
+            successThreshold: 1
+            timeoutSeconds: 2
+          livenessProbe:
+            failureThreshold: 3
+            initialDelaySeconds: 30
+            periodSeconds: 10
+            successThreshold: 1
+            tcpSocket:
+              port: 3000
+            timeoutSeconds: 1
+          resources:
+            requests:
+              cpu: 250m
+              memory: 750Mi
+            limits:
+              cpu: 500m
+              memory: 1Gi
+          volumeMounts:
+            - mountPath: /var/lib/grafana
+              name: grafana-pv
+      volumes:
+        - name: grafana-pv
+          persistentVolumeClaim:
+            claimName: grafana-pvc
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: grafana
+  namespace: monitoring
+spec:
+  ports:
+    - port: 3000
+      protocol: TCP
+      targetPort: http-grafana
+  selector:
+    app: grafana
+  sessionAffinity: None
+  type: LoadBalancer
diff --git a/stacks/monitoring/main.go b/stacks/monitoring/main.go
new file mode 100644
index 0000000..ab3dcc3
--- /dev/null
+++ b/stacks/monitoring/main.go
@@ -0,0 +1,45 @@
+package main
+
+import (
+	"meshed/kubernetes"
+
+	corev1 "github.com/pulumi/pulumi-kubernetes/sdk/v3/go/kubernetes/core/v1"
+	metav1 "github.com/pulumi/pulumi-kubernetes/sdk/v3/go/kubernetes/meta/v1"
+	"github.com/pulumi/pulumi-kubernetes/sdk/v3/go/kubernetes/yaml"
+	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
+)
+
+func main() {
+	pulumi.Run(func(ctx *pulumi.Context) error {
+		clusterStack, err := pulumi.NewStackReference(ctx, "scott-the-programmer/meshed/cluster", nil)
+		if err != nil {
+			return err
+		}
+		config := clusterStack.GetStringOutput(pulumi.String("kubeconfig"))
+
+		provider, err := kubernetes.NewKubernetesProvider(ctx, config)
+		if err != nil {
+			return err
+		}
+
+		ns, err := corev1.NewNamespace(ctx, "monitoring",
+			&corev1.NamespaceArgs{
+				Metadata: metav1.ObjectMetaArgs{
+					Name: pulumi.String("monitoring"),
+				}}, pulumi.Provider(provider))
+		if err != nil {
+			return err
+		}
+
+		_, err = yaml.NewConfigFile(ctx, "monitoring-deployment",
+			&yaml.ConfigFileArgs{
+				File: "grafana.yaml",
+			},
+			pulumi.Provider(provider), pulumi.Parent(ns))
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+}