From 4a930b284303979fd47b7ee6ac18647e2c2b06c6 Mon Sep 17 00:00:00 2001
From: Brian On <brian.on@addepar.com>
Date: Sun, 2 Jan 2022 22:35:06 -0800
Subject: [PATCH] sample hpa

---
 deploy/Makefile                               |  2 +-
 deploy/addepar/custom-metrics-namespace.json  | 10 ---
 deploy/addepar/prometheus/Makefile            |  5 ++
 deploy/addepar/prometheus/prometheus.yaml     | 63 +++++++++++++++++++
 deploy/addepar/sample-hpa/Makefile            | 25 ++++++++
 .../addepar/sample-hpa/sample-app.deploy.yaml | 22 +++++++
 deploy/addepar/sample-hpa/sample-app.hpa.yaml | 24 +++++++
 .../sample-hpa/sample-app.service.yaml        | 15 +++++
 .../addepar/sample-hpa/service-monitor.yaml   | 12 ++++
 9 files changed, 167 insertions(+), 11 deletions(-)
 delete mode 100644 deploy/addepar/custom-metrics-namespace.json
 create mode 100644 deploy/addepar/prometheus/Makefile
 create mode 100644 deploy/addepar/prometheus/prometheus.yaml
 create mode 100644 deploy/addepar/sample-hpa/Makefile
 create mode 100644 deploy/addepar/sample-hpa/sample-app.deploy.yaml
 create mode 100644 deploy/addepar/sample-hpa/sample-app.hpa.yaml
 create mode 100644 deploy/addepar/sample-hpa/sample-app.service.yaml
 create mode 100644 deploy/addepar/sample-hpa/service-monitor.yaml

diff --git a/deploy/Makefile b/deploy/Makefile
index e249f819..e1573d12 100644
--- a/deploy/Makefile
+++ b/deploy/Makefile
@@ -7,7 +7,7 @@ delete-adapter-local:
 	kubectl delete -f manifests/
 
 namespace:
-	kubectl create -f addepar/custom-metrics-namespace.json
+	kubectl create namespace custom-metrics
 
 raw:
 	kubectl get --raw /apis/custom.metrics.k8s.io/v1beta1
diff --git a/deploy/addepar/custom-metrics-namespace.json b/deploy/addepar/custom-metrics-namespace.json
deleted file mode 100644
index 472b9f11..00000000
--- a/deploy/addepar/custom-metrics-namespace.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "apiVersion": "v1",
-  "kind": "Namespace",
-  "metadata": {
-    "name": "custom-metrics",
-    "labels": {
-      "name": "custom-metrics"
-    }
-  }
-}
diff --git a/deploy/addepar/prometheus/Makefile b/deploy/addepar/prometheus/Makefile
new file mode 100644
index 00000000..2f772ede
--- /dev/null
+++ b/deploy/addepar/prometheus/Makefile
@@ -0,0 +1,5 @@
+deploy:
+	kubectl create -n prom -f prometheus.yaml
+
+namespace:
+	kubectl create namespace prom
diff --git a/deploy/addepar/prometheus/prometheus.yaml b/deploy/addepar/prometheus/prometheus.yaml
new file mode 100644
index 00000000..f9df65f1
--- /dev/null
+++ b/deploy/addepar/prometheus/prometheus.yaml
@@ -0,0 +1,63 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: prometheus
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: prometheus
+rules:
+  - apiGroups: [""]
+    resources:
+      - nodes
+      - services
+      - endpoints
+      - pods
+    verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources:
+      - configmaps
+    verbs: ["get"]
+  - nonResourceURLs: ["/metrics"]
+    verbs: ["get"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: prometheus
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: prometheus
+subjects:
+  - kind: ServiceAccount
+    name: prometheus
+    namespace: prom
+---
+apiVersion: monitoring.coreos.com/v1
+kind: Prometheus
+metadata:
+  name: prometheus
+spec:
+  # Match all service monitors in all namespaces
+  serviceMonitorNamespaceSelector: {}
+  serviceMonitorSelector: {}
+  resources:
+    requests:
+      memory: 400Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: prometheus
+spec:
+  type: NodePort
+  ports:
+    - name: web
+      nodePort: 30900
+      port: 9090
+      protocol: TCP
+      targetPort: web
+  selector:
+    prometheus: prometheus
diff --git a/deploy/addepar/sample-hpa/Makefile b/deploy/addepar/sample-hpa/Makefile
new file mode 100644
index 00000000..995c5070
--- /dev/null
+++ b/deploy/addepar/sample-hpa/Makefile
@@ -0,0 +1,25 @@
+sample-app:
+	kubectl create -n default -f sample-app.deploy.yaml
+	kubectl create -n default -f sample-app.service.yaml
+
+delete-sample-app:
+	kubectl delete -n default -f sample-app.deploy.yaml
+	kubectl delete -n default -f sample-app.service.yaml
+
+monitor:
+	kubectl create -n default -f service-monitor.yaml
+
+hpa:
+	kubectl delete -f sample-app.hpa.yaml
+	kubectl create -f sample-app.hpa.yaml
+
+test:
+	kubectl get --raw "/apis/custom.metrics.k8s.io/v1beta1/namespaces/default/pods/*/http_requests?selector=app%3Dsample-app"
+
+get-ip:
+	kubectl get service sample-app -o jsonpath='{ .spec.clusterIP }'
+
+busybox:
+	# run wget -qO- IP_ADDRESS
+	kubectl run -it --rm --restart=Never busybox --image=gcr.io/google-containers/busybox sh
+
diff --git a/deploy/addepar/sample-hpa/sample-app.deploy.yaml b/deploy/addepar/sample-hpa/sample-app.deploy.yaml
new file mode 100644
index 00000000..3a0ad13e
--- /dev/null
+++ b/deploy/addepar/sample-hpa/sample-app.deploy.yaml
@@ -0,0 +1,22 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: sample-app
+  labels:
+    app: sample-app
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: sample-app
+  template:
+    metadata:
+      labels:
+        app: sample-app
+    spec:
+      containers:
+        - image: luxas/autoscale-demo:v0.1.2
+          name: metrics-provider
+          ports:
+            - name: http
+              containerPort: 8080
diff --git a/deploy/addepar/sample-hpa/sample-app.hpa.yaml b/deploy/addepar/sample-hpa/sample-app.hpa.yaml
new file mode 100644
index 00000000..674ffbde
--- /dev/null
+++ b/deploy/addepar/sample-hpa/sample-app.hpa.yaml
@@ -0,0 +1,24 @@
+kind: HorizontalPodAutoscaler
+apiVersion: autoscaling/v2beta1
+metadata:
+  name: sample-app
+spec:
+  scaleTargetRef:
+    # point the HPA at the sample application
+    # you created above
+    apiVersion: apps/v1
+    kind: Deployment
+    name: sample-app
+  # autoscale between 1 and 10 replicas
+  minReplicas: 1
+  maxReplicas: 10
+  metrics:
+    # use a "Pods" metric, which takes the average of the
+    # given metric across all pods controlled by the autoscaling target
+    - type: Pods
+      pods:
+        # use the metric that you used above: pods/http_requests
+        metricName: http_requests
+        # target 500 milli-requests per second,
+        # which is 1 request every two seconds
+        targetAverageValue: 20m
diff --git a/deploy/addepar/sample-hpa/sample-app.service.yaml b/deploy/addepar/sample-hpa/sample-app.service.yaml
new file mode 100644
index 00000000..04710a8c
--- /dev/null
+++ b/deploy/addepar/sample-hpa/sample-app.service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: sample-app
+  name: sample-app
+spec:
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: 8080
+  selector:
+    app: sample-app
+  type: ClusterIP
diff --git a/deploy/addepar/sample-hpa/service-monitor.yaml b/deploy/addepar/sample-hpa/service-monitor.yaml
new file mode 100644
index 00000000..2b4b4efe
--- /dev/null
+++ b/deploy/addepar/sample-hpa/service-monitor.yaml
@@ -0,0 +1,12 @@
+kind: ServiceMonitor
+apiVersion: monitoring.coreos.com/v1
+metadata:
+  name: sample-app
+  labels:
+    app: sample-app
+spec:
+  selector:
+    matchLabels:
+      app: sample-app
+  endpoints:
+    - port: http