From 358191904954c1568f8e7545ea19c0764c338fb0 Mon Sep 17 00:00:00 2001
From: Erickson Silva de Oliveira <Erickson.SilvadeOliveira@windriver.com>
Date: Tue, 13 Feb 2024 09:13:29 -0300
Subject: [PATCH 1/2] Add sample app to metrics-server

This patch allows the creation of a metrics-server sample-app. It adds
the necessary elements to templates to create a sample-app pod on a
metrics-server namespace.

Signed-off-by: Erickson Silva de Oliveira <Erickson.SilvadeOliveira@windriver.com>
Signed-off-by: Luiz Felipe Kina <LuizFelipe.EiskeKina@windriver.com>
---
 templates/sample-app-cluster-role-binding.yml | 16 ++++++++++++
 templates/sample-app-cluster-role.yml         | 17 +++++++++++++
 templates/sample-app-deployment.yml           | 25 +++++++++++++++++++
 templates/sample-app-service-account.yml      | 11 ++++++++
 values.yaml                                   |  8 ++++++
 5 files changed, 77 insertions(+)
 create mode 100644 templates/sample-app-cluster-role-binding.yml
 create mode 100644 templates/sample-app-cluster-role.yml
 create mode 100644 templates/sample-app-deployment.yml
 create mode 100644 templates/sample-app-service-account.yml

diff --git a/templates/sample-app-cluster-role-binding.yml b/templates/sample-app-cluster-role-binding.yml
new file mode 100644
index 00000000..cffc2f1a
--- /dev/null
+++ b/templates/sample-app-cluster-role-binding.yml
@@ -0,0 +1,16 @@
+{{- if .Values.sampleApp.create -}}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    app: metrics-server-test-app
+  name: access-metrics-api
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: access-metrics-api
+subjects:
+- kind: ServiceAccount
+  name: metrics-server-test-app
+  namespace: metrics-server
+{{- end }}
diff --git a/templates/sample-app-cluster-role.yml b/templates/sample-app-cluster-role.yml
new file mode 100644
index 00000000..c78fb282
--- /dev/null
+++ b/templates/sample-app-cluster-role.yml
@@ -0,0 +1,17 @@
+{{- if .Values.sampleApp.create -}}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app: metrics-server-test-app
+  name: access-metrics-api
+rules:
+- apiGroups:
+    - metrics.k8s.io
+  resources:
+    - pods
+    - nodes
+  verbs:
+    - get
+    - list
+{{- end }}
\ No newline at end of file
diff --git a/templates/sample-app-deployment.yml b/templates/sample-app-deployment.yml
new file mode 100644
index 00000000..26de1cc9
--- /dev/null
+++ b/templates/sample-app-deployment.yml
@@ -0,0 +1,25 @@
+{{- if .Values.sampleApp.create -}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: metrics-server-test-app-deployment
+  namespace: metrics-server
+spec:
+  selector:
+    matchLabels:
+      app: metrics-server-test-app
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: metrics-server-test-app
+    spec:
+      containers:
+      - name: sample-app
+        image: {{ printf "%s:%s" .Values.sampleApp.image.repository (.Values.sampleApp.image.tag | default "latest") }}
+        imagePullPolicy: IfNotPresent
+        env:
+        - name: TOKEN_PATH
+          value: /var/run/secrets/kubernetes.io/serviceaccount/token
+      serviceAccountName: metrics-server-test-app
+{{- end -}}
diff --git a/templates/sample-app-service-account.yml b/templates/sample-app-service-account.yml
new file mode 100644
index 00000000..81b0ef6a
--- /dev/null
+++ b/templates/sample-app-service-account.yml
@@ -0,0 +1,11 @@
+{{- if .Values.sampleApp.create -}}
+apiVersion: v1
+imagePullSecrets:
+- name: default-registry-key
+kind: ServiceAccount
+metadata:
+  labels:
+    app: metrics-server-test-app
+  name: metrics-server-test-app
+  namespace: metrics-server
+{{- end }}
diff --git a/values.yaml b/values.yaml
index 4f6b9219..54567451 100644
--- a/values.yaml
+++ b/values.yaml
@@ -195,5 +195,13 @@ deploymentAnnotations: {}

 schedulerName: ""

+# If you want to deploy a sample app application to test metrics server
+# Set the create value to true
+sampleApp:
+  create: false
+  image:
+    repository: docker.io/starlingx/stx-metrics-server-sample-app
+    tag: stx.7.0-v1.0.0
+
 tmpVolume:
   emptyDir: {}
--
2.34.1