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 }}