Add node problem detector as an addon pod.

cluster/addons/node-problem-detector/MAINTAINERS.md

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+# Maintainers
+
+Lantao Liu <lantaol@google.com>
+
+
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/cluster/addons/node-problem-detector/MAINTAINERS.md?pixel)]()

cluster/addons/node-problem-detector/README.md

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+# Node Problem Detector
+==============
+
+Node Problem Detector is a DaemonSet running on each node, detecting node
+problems.
+
+Learn more at: https://github.com/kubernetes/node-problem-detector
+
+
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/cluster/addons/node-problem-detector/README.md?pixel)]()

cluster/addons/node-problem-detector/node-problem-detector.yaml.in

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+apiVersion: extensions/v1beta1
+kind: DaemonSet
+metadata:
+  name: node-problem-detector-v0.1
+  namespace: kube-system
+  labels:
+    k8s-app: node-problem-detector
+    version: v0.1
+    kubernetes.io/cluster-service: "true"
+spec:
+  template:
+    metadata:
+      labels:
+        k8s-app: node-problem-detector
+        version: v0.1
+        kubernetes.io/cluster-service: "true"
+    spec:
+      hostNetwork: true
+      containers:
+      - name: node-problem-detector
+        image: gcr.io/google_containers/node-problem-detector:v0.1
+        env:
+        # Config the host ip and port of apiserver.
+        - name: "KUBERNETES_SERVICE_HOST"
+          value: "{{ pillar['master_node'] }}"
+        - name: "KUBERNETES_SERVICE_PORT"
+          value: "443"
+        securityContext:
+          privileged: true
+        resources:
+          limits:
+            cpu: "200m"
+            memory: "100Mi"
+          requests:
+            cpu: "50m"
+            memory: "20Mi"
+        volumeMounts:
+        - name: log
+          mountPath: /log
+          readOnly: true
+      volumes:
+      - name: log
+        hostPath:
+          path: /var/log/