add kustomize canary

canary/base/deployment.yml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: echo
+  labels:
+    app: echo
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: echo
+  template:
+    metadata:
+      labels:
+        app: echo
+    spec:
+      containers:
+      - name: echo
+        image: gcr.io/google-containers/echoserver:1.10
+        ports:
+        - containerPort: 8080
+        env:
+        - name: NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        - name: POD_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.name
+        - name: POD_NAMESPACE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: POD_IP
+          valueFrom:
+            fieldRef:
+              fieldPath: status.podIP
+

canary/base/ingress.yml

+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: echo
+spec:
+  rules:
+  - host: echo.imt-atlantique.fr
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: echo
+            port:
+              number: 80

canary/base/kustomization.yml

+resources:
+  - deployment.yml
+  - service.yml
+  - ingress.yml

canary/base/service.yml

+apiVersion: v1
+kind: Service
+metadata:
+  name: echo
+  labels:
+    app: echo
+spec:
+  ports:
+  - port: 80
+    targetPort: 8080
+    protocol: TCP
+    name: http
+  selector:
+    app: echo

canary/overlays/canary/ingress.yml

+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: echo
+  annotations:
+    nginx.ingress.kubernetes.io/canary: "true"
+    nginx.ingress.kubernetes.io/canary-weight: "30"
+    nginx.ingress.kubernetes.io/canary-by-header: canary

canary/overlays/canary/kustomization.yml

+bases:
+  - ../../base
+
+nameprefix: canary-
+
+commonLabels:
+  variant: canary
+
+patchesStrategicMerge:
+  - ingress.yml
+

canary/overlays/production/kustomization.yml

+bases:
+  - ../../base
+
+commonLabels:
+  variant: production

canary/tests.sh

+#!/bin/bash
+
+printf "No headers\n"
+for i in $(seq 1 10);
+do
+curl -s --resolve echo.imt-atlantique.fr:80:127.0.0.1 echo.imt-atlantique.fr | grep "Hostname";
+done
+
+printf "\ncanary: never\n"
+for i in $(seq 1 10);
+do
+curl -s -H "canary: never" --resolve echo.imt-atlantique.fr:80:127.0.0.1 echo.imt-atlantique.fr | grep "Hostname";
+done
+
+printf "\ncanary: always\n"
+for i in $(seq 1 10);
+do
+curl -s -H "canary: always" --resolve echo.imt-atlantique.fr:80:127.0.0.1 echo.imt-atlantique.fr | grep "Hostname";
+done