Add charts templates for k8s config

Add in prod config libcluster:
config :libcluster,
  topologies: [
    default: [
      strategy: Cluster.Strategy.Kubernetes,
      config: [
        mode: :dns,
        kubernetes_node_basename: "claper",
        kubernetes_selector: "app=claper",
        kubernetes_namespace: "default",
        polling_interval: 10_000
      ]
    ]
  ]

charts/claper/Chart.yaml

@@ -0,0 +1,5 @@
+apiVersion: v2
+appVersion: 1.0.0
+description: Claper app
+name: claper
+version: 1.0.0

charts/claper/templates/_env.yaml

@@ -0,0 +1,31 @@
+{{- define "env" -}}
+- name: SECRET_KEY_BASE
+  valueFrom:
+    secretKeyRef:
+      name: claper-secret
+      key: secret-key-base
+- name: POD_IP
+  valueFrom:
+    fieldRef:
+      fieldPath: status.podIP
+- name: NAMESPACE
+  valueFrom:
+    fieldRef:
+      fieldPath: metadata.namespace
+- name: ENDPOINT_HOST
+  value: claper.co
+- name: DATABASE_URL
+  value: postgresql://claper:claper@10.0.0.6:6432/claper
+- name: AWS_ACCESS_KEY_ID
+  value: XXX
+- name: AWS_PRES_BUCKET
+  value: XXX
+- name: POOL_SIZE
+  value: "20"
+- name: AWS_REGION
+  value: eu-west-3
+- name: AWS_SECRET_ACCESS_KEY
+  value: XXX
+- name: PRESENTATION_STORAGE
+  value: s3
+{{- end -}}

charts/claper/templates/autoscaling.yaml

@@ -0,0 +1,18 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: claper-hpa
+spec:
+  maxReplicas: 5
+  minReplicas: 1
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: claper-app
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 50

charts/claper/templates/deployment.yaml

@@ -0,0 +1,37 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: claper-app
+  labels:
+    app: claper
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: claper
+  template:
+    metadata:
+      labels:
+        app: claper
+    spec:
+      serviceAccountName: sa-claper
+      containers:
+      - name: claper
+        image: ghcr.io/claperco/claper:latest
+        imagePullPolicy: Always
+        resources:
+          requests:
+            cpu: "300m"
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 4000
+          initialDelaySeconds: 60
+          periodSeconds: 20
+        ports:
+          - containerPort: 4000
+          - name: epmd
+            containerPort: 4369
+            protocol: TCP
+        env:
+{{ include "env" . | indent 10 }}

charts/claper/templates/headless.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: claper-svc-headless
+spec:
+  ports:
+    - port: 4369
+      targetPort: epmd
+      protocol: TCP
+      name: epmd
+  selector:
+    app: claper
+  clusterIP: None

charts/claper/templates/ingress.yaml

@@ -0,0 +1,23 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: claper-ingress
+  annotations:
+    kubernetes.io/ingress.class: nginx
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+spec:
+  tls:
+  - hosts:
+    - claper.co
+    secretName: claper-tls
+  rules:
+    - host: claper.co
+      http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: claper-svc
+                port:
+                  number: 80

charts/claper/templates/rbac.yaml

@@ -0,0 +1,29 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: sa-claper
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: role-claper
+rules:
+  - apiGroups:
+      - ""
+    resources:
+      - endpoints
+    verbs:
+      - list
+      - get
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: rb-claper
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: role-claper
+subjects:
+  - kind: ServiceAccount
+    name: sa-claper

charts/claper/templates/service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: claper-svc
+  labels:
+    app: claper
+spec:
+  type: ClusterIP
+  ports:
+  - name: cowboy
+    port: 80
+    targetPort: 4000
+  - port: 4369
+    name: epmd
+    targetPort: 4369
+  selector:
+    app: claper