Merge pull request #170 from weaveworks/nginx

Add support for nginx ingress controller

Makefile

@@ -18,6 +18,12 @@ run-appmesh:
 	-slack-url=https://hooks.slack.com/services/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 \
 	-slack-channel="devops-alerts"
 
+run-nginx:
+	go run cmd/flagger/* -kubeconfig=$$HOME/.kube/config -log-level=info -mesh-provider=nginx -namespace=nginx \
+	-metrics-server=http://prometheus-weave.istio.weavedx.com \
+	-slack-url=https://hooks.slack.com/services/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 \
+	-slack-channel="devops-alerts"
+
 build:
 	docker build -t weaveworks/flagger:$(TAG) . -f Dockerfile
 

artifacts/flagger/account.yaml

@@ -31,6 +31,12 @@ rules:
     resources:
       - horizontalpodautoscalers
     verbs: ["*"]
+  - apiGroups:
+      - "extensions"
+    resources:
+      - ingresses
+      - ingresses/status
+    verbs: ["*"]
   - apiGroups:
       - flagger.app
     resources:

artifacts/flagger/crd.yaml

@@ -69,6 +69,18 @@ spec:
                   type: string
                 name:
                   type: string
+            ingressRef:
+              anyOf:
+                - type: string
+                - type: object
+              required: ['apiVersion', 'kind', 'name']
+              properties:
+                apiVersion:
+                  type: string
+                kind:
+                  type: string
+                name:
+                  type: string
             service:
               type: object
               required: ['port']

artifacts/nginx/canary.yaml

@@ -0,0 +1,59 @@
+apiVersion: flagger.app/v1alpha3
+kind: Canary
+metadata:
+  name: podinfo
+  namespace: test
+spec:
+  # deployment reference
+  targetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: podinfo
+  # ingress reference
+  ingressRef:
+    apiVersion: extensions/v1beta1
+    kind: Ingress
+    name: podinfo
+  # HPA reference (optional)
+  autoscalerRef:
+    apiVersion: autoscaling/v2beta1
+    kind: HorizontalPodAutoscaler
+    name: podinfo
+  # the maximum time in seconds for the canary deployment
+  # to make progress before it is rollback (default 600s)
+  progressDeadlineSeconds: 60
+  service:
+    # container port
+    port: 9898
+  canaryAnalysis:
+    # schedule interval (default 60s)
+    interval: 10s
+    # max number of failed metric checks before rollback
+    threshold: 10
+    # max traffic percentage routed to canary
+    # percentage (0-100)
+    maxWeight: 50
+    # canary increment step
+    # percentage (0-100)
+    stepWeight: 5
+    # NGINX Prometheus checks
+    metrics:
+    - name: request-success-rate
+      # minimum req success rate (non 5xx responses)
+      # percentage (0-100)
+      threshold: 99
+      interval: 1m
+    - name: request-duration
+      # maximum avg req duration
+      # milliseconds
+      threshold: 500
+      interval: 1m
+    # external checks (optional)
+    webhooks:
+      - name: load-test
+        url: http://flagger-loadtester.test/
+        timeout: 5s
+        metadata:
+          type: cmd
+          cmd: "hey -z 1m -q 10 -c 2 http://app.example.com/"
+          logCmdOutput: "true"

artifacts/nginx/deployment.yaml

@@ -0,0 +1,69 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podinfo
+  namespace: test
+  labels:
+    app: podinfo
+spec:
+  replicas: 1
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: podinfo
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+      labels:
+        app: podinfo
+    spec:
+      containers:
+      - name: podinfod
+        image: quay.io/stefanprodan/podinfo:1.4.0
+        imagePullPolicy: IfNotPresent
+        ports:
+        - containerPort: 9898
+          name: http
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --level=info
+        - --random-delay=false
+        - --random-error=false
+        env:
+        - name: PODINFO_UI_COLOR
+          value: green
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          failureThreshold: 3
+          periodSeconds: 10
+          successThreshold: 1
+          timeoutSeconds: 2
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          failureThreshold: 3
+          periodSeconds: 3
+          successThreshold: 1
+          timeoutSeconds: 2
+        resources:
+          limits:
+            cpu: 1000m
+            memory: 256Mi
+          requests:
+            cpu: 100m
+            memory: 16Mi

artifacts/nginx/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: podinfo
+  namespace: test
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: podinfo
+  minReplicas: 2
+  maxReplicas: 4
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      # scale up if usage is above
+      # 99% of the requested CPU (100m)
+      targetAverageUtilization: 99

artifacts/nginx/ingress.yaml

@@ -0,0 +1,17 @@
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: podinfo
+  namespace: test
+  labels:
+    app: podinfo
+  annotations:
+    kubernetes.io/ingress.class: "nginx"
+spec:
+  rules:
+    - host: app.exmaple.com
+      http:
+        paths:
+          - backend:
+              serviceName: podinfo
+              servicePort: 9898

charts/flagger/templates/crd.yaml

@@ -70,6 +70,18 @@ spec:
                   type: string
                 name:
                   type: string
+            ingressRef:
+              anyOf:
+                - type: string
+                - type: object
+              required: ['apiVersion', 'kind', 'name']
+              properties:
+                apiVersion:
+                  type: string
+                kind:
+                  type: string
+                name:
+                  type: string
             service:
               type: object
               required: ['port']

charts/flagger/templates/deployment.yaml

@@ -38,7 +38,11 @@ spec:
           {{- if .Values.meshProvider }}
           - -mesh-provider={{ .Values.meshProvider }}
           {{- end }}
+          {{- if .Values.prometheus.install }}
+          - -metrics-server=http://{{ template "flagger.fullname" . }}-prometheus:9090
+          {{- else }}
           - -metrics-server={{ .Values.metricsServer }}
+          {{- end }}
           {{- if .Values.namespace }}
           - -namespace={{ .Values.namespace }}
           {{- end }}