Consistent hashing to a subset of nodes. It works like consistent hash,

but instead of mapping to a single node, we map to a subset of nodes.

docs/examples/chashsubset/deployment.yaml

@@ -0,0 +1,70 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  labels:
+    app: nginxhello
+spec:
+  replicas: 10
+  selector:
+    matchLabels:
+      app: nginxhello
+  template:
+    metadata:
+      labels:
+        app: nginxhello
+    spec:
+      containers:
+        - name: nginxhello
+          image: gcr.io/kubernetes-e2e-test-images/echoserver:2.2
+          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
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: nginxhello
+  labels:
+    app: nginxhello
+spec:
+  selector:
+    app: nginxhello
+  ports:
+    - name: http
+      port: 80
+      targetPort: 8080
+
+---
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  annotations:
+    nginx.ingress.kubernetes.io/upstream-hash-by: "$arg_predictorid"
+    nginx.ingress.kubernetes.io/upstream-hash-by-subset: "true"
+    nginx.ingress.kubernetes.io/upstream-hash-by-subset-size: "3"
+  name: nginxhello-ingress
+  namespace: default
+spec:
+  backend:
+    serviceName: nginxhello
+    servicePort: 80
+