add node-exporter, kube-state-metrics, and alertmanager controller

Also ensure that all workloads have memory requirements and limits.

manifests/controllers/alertmanager-controller.yaml

+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: alertmanager-controller
+  labels:
+    controller: alertmanager
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        controller: alertmanager
+    spec:
+      containers:
+       - name: alertmanager-controller
+         image: quay.io/coreos/kube-alertmanager-controller:latest
+         resources:
+           requests:
+             cpu: 100m
+             memory: 50Mi
+           limits:
+             cpu: 200m
+             memory: 100Mi
+

manifests/controllers/prometheus-controller.yaml

@@ -18,4 +18,7 @@ spec:
            requests:
              cpu: 100m
              memory: 50Mi
+           limits:
+             cpu: 200m
+             memory: 100Mi
       

manifests/exporters/kube-state-metrics-bundle.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    prometheus.io/scrape: 'true'
+  labels:
+    app: kube-state-metrics
+    name: kube-state-metrics
+  name: kube-state-metrics
+spec:
+  clusterIP: None
+  ports:
+  - name: scrape
+    port: 8080
+    protocol: TCP
+  selector:
+    app: kube-state-metrics
+  type: ClusterIP
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: kube-state-metrics
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: kube-state-metrics
+      annotations:
+        prometheus.io/scrape: 'true'
+    spec:
+      containers:
+      - name: kube-state-metrics
+        image: gcr.io/google_containers/kube-state-metrics:v0.3.0
+        ports:
+        - containerPort: 8080
+        resources:
+          requests:
+            memory: 30Mi
+            cpu: 100m
+          limits:
+            memory: 50Mi
+            cpu: 200m
+

manifests/exporters/node-exporter-bundle.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    prometheus.io/scrape: 'true'
+  labels:
+    app: node-exporter
+    name: node-exporter
+  name: node-exporter
+spec:
+  clusterIP: None
+  ports:
+  - name: scrape
+    port: 9100
+    protocol: TCP
+  selector:
+    app: node-exporter
+  type: ClusterIP
+---
+apiVersion: extensions/v1beta1
+kind: DaemonSet
+metadata:
+  name: node-exporter
+spec:
+  template:
+    metadata:
+      labels:
+        app: node-exporter
+      name: node-exporter
+    spec:
+      hostNetwork: true
+      hostPID: true
+      containers:
+      - image:  quay.io/prometheus/node-exporter:0.12.0
+        name: node-exporter
+        ports:
+        - containerPort: 9100
+          hostPort: 9100
+          name: scrape
+        resources:
+          requests:
+            memory: 30Mi
+            cpu: 100m
+          limits:
+            memory: 50Mi
+            cpu: 200m
+